// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2020 Bootlin
 * Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/videodev2.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-image-sizes.h>
#include <media/v4l2-mediabus.h>

/* Clock rate */

#define OV5648_XVCLK_RATE                       24000000

/* Register definitions */

/* System */

#define OV5648_SW_STANDBY_REG                   0x100
#define OV5648_SW_STANDBY_STREAM_ON             BIT(0)

#define OV5648_SW_RESET_REG                     0x103
#define OV5648_SW_RESET_RESET                   BIT(0)

#define OV5648_PAD_OEN0_REG                     0x3000
#define OV5648_PAD_OEN1_REG                     0x3001
#define OV5648_PAD_OEN2_REG                     0x3002
#define OV5648_PAD_OUT0_REG                     0x3008
#define OV5648_PAD_OUT1_REG                     0x3009

#define OV5648_CHIP_ID_H_REG                    0x300a
#define OV5648_CHIP_ID_H_VALUE                  0x56
#define OV5648_CHIP_ID_L_REG                    0x300b
#define OV5648_CHIP_ID_L_VALUE                  0x48

#define OV5648_PAD_OUT2_REG                     0x300d
#define OV5648_PAD_SEL0_REG                     0x300e
#define OV5648_PAD_SEL1_REG                     0x300f
#define OV5648_PAD_SEL2_REG                     0x3010
#define OV5648_PAD_PK_REG                       0x3011
#define OV5648_PAD_PK_PD_DATO_EN                BIT(7)
#define OV5648_PAD_PK_DRIVE_STRENGTH_1X         (0 << 5)
#define OV5648_PAD_PK_DRIVE_STRENGTH_2X         (2 << 5)
#define OV5648_PAD_PK_FREX_N                    BIT(1)

#define OV5648_A_PWC_PK_O0_REG                  0x3013
#define OV5648_A_PWC_PK_O0_BP_REGULATOR_N       BIT(3)
#define OV5648_A_PWC_PK_O1_REG                  0x3014

#define OV5648_MIPI_PHY0_REG                    0x3016
#define OV5648_MIPI_PHY1_REG                    0x3017
#define OV5648_MIPI_SC_CTRL0_REG                0x3018
#define OV5648_MIPI_SC_CTRL0_MIPI_LANES(v)      (((v) << 5) & GENMASK(7, 5))
#define OV5648_MIPI_SC_CTRL0_PHY_HS_TX_PD       BIT(4)
#define OV5648_MIPI_SC_CTRL0_PHY_LP_RX_PD       BIT(3)
#define OV5648_MIPI_SC_CTRL0_MIPI_EN            BIT(2)
#define OV5648_MIPI_SC_CTRL0_MIPI_SUSP          BIT(1)
#define OV5648_MIPI_SC_CTRL0_LANE_DIS_OP        BIT(0)
#define OV5648_MIPI_SC_CTRL1_REG                0x3019
#define OV5648_MISC_CTRL0_REG                   0x3021
#define OV5648_MIPI_SC_CTRL2_REG                0x3022
#define OV5648_SUB_ID_REG                       0x302a

#define OV5648_PLL_CTRL0_REG                    0x3034
#define OV5648_PLL_CTRL0_PLL_CHARGE_PUMP(v)     (((v) << 4) & GENMASK(6, 4))
#define OV5648_PLL_CTRL0_BITS(v)                ((v) & GENMASK(3, 0))
#define OV5648_PLL_CTRL1_REG                    0x3035
#define OV5648_PLL_CTRL1_SYS_DIV(v)             (((v) << 4) & GENMASK(7, 4))
#define OV5648_PLL_CTRL1_MIPI_DIV(v)            ((v) & GENMASK(3, 0))
#define OV5648_PLL_MUL_REG                      0x3036
#define OV5648_PLL_MUL(v)                       ((v) & GENMASK(7, 0))
#define OV5648_PLL_DIV_REG                      0x3037
#define OV5648_PLL_DIV_ROOT_DIV(v)              ((((v) - 1) << 4) & BIT(4))
#define OV5648_PLL_DIV_PLL_PRE_DIV(v)           ((v) & GENMASK(3, 0))
#define OV5648_PLL_DEBUG_REG                    0x3038
#define OV5648_PLL_BYPASS_REG                   0x3039

#define OV5648_PLLS_BYPASS_REG                  0x303a
#define OV5648_PLLS_MUL_REG                     0x303b
#define OV5648_PLLS_MUL(v)                      ((v) & GENMASK(4, 0))
#define OV5648_PLLS_CTRL_REG                    0x303c
#define OV5648_PLLS_CTRL_PLL_CHARGE_PUMP(v)     (((v) << 4) & GENMASK(6, 4))
#define OV5648_PLLS_CTRL_SYS_DIV(v)             ((v) & GENMASK(3, 0))
#define OV5648_PLLS_DIV_REG                     0x303d
#define OV5648_PLLS_DIV_PLLS_PRE_DIV(v)         (((v) << 4) & GENMASK(5, 4))
#define OV5648_PLLS_DIV_PLLS_DIV_R(v)           ((((v) - 1) << 2) & BIT(2))
#define OV5648_PLLS_DIV_PLLS_SEL_DIV(v)         ((v) & GENMASK(1, 0))

#define OV5648_SRB_CTRL_REG                     0x3106
#define OV5648_SRB_CTRL_SCLK_DIV(v)             (((v) << 2) & GENMASK(3, 2))
#define OV5648_SRB_CTRL_RESET_ARBITER_EN        BIT(1)
#define OV5648_SRB_CTRL_SCLK_ARBITER_EN         BIT(0)

/* Group Hold */

#define OV5648_GROUP_ADR0_REG                   0x3200
#define OV5648_GROUP_ADR1_REG                   0x3201
#define OV5648_GROUP_ADR2_REG                   0x3202
#define OV5648_GROUP_ADR3_REG                   0x3203
#define OV5648_GROUP_LEN0_REG                   0x3204
#define OV5648_GROUP_LEN1_REG                   0x3205
#define OV5648_GROUP_LEN2_REG                   0x3206
#define OV5648_GROUP_LEN3_REG                   0x3207
#define OV5648_GROUP_ACCESS_REG                 0x3208

/* Exposure/gain/banding */

#define OV5648_EXPOSURE_CTRL_HH_REG             0x3500
#define OV5648_EXPOSURE_CTRL_HH(v)              (((v) & GENMASK(19, 16)) >> 16)
#define OV5648_EXPOSURE_CTRL_HH_VALUE(v)        (((v) << 16) & GENMASK(19, 16))
#define OV5648_EXPOSURE_CTRL_H_REG              0x3501
#define OV5648_EXPOSURE_CTRL_H(v)               (((v) & GENMASK(15, 8)) >> 8)
#define OV5648_EXPOSURE_CTRL_H_VALUE(v)         (((v) << 8) & GENMASK(15, 8))
#define OV5648_EXPOSURE_CTRL_L_REG              0x3502
#define OV5648_EXPOSURE_CTRL_L(v)               ((v) & GENMASK(7, 0))
#define OV5648_EXPOSURE_CTRL_L_VALUE(v)         ((v) & GENMASK(7, 0))
#define OV5648_MANUAL_CTRL_REG                  0x3503
#define OV5648_MANUAL_CTRL_FRAME_DELAY(v)       (((v) << 4) & GENMASK(5, 4))
#define OV5648_MANUAL_CTRL_AGC_MANUAL_EN        BIT(1)
#define OV5648_MANUAL_CTRL_AEC_MANUAL_EN        BIT(0)
#define OV5648_GAIN_CTRL_H_REG                  0x350a
#define OV5648_GAIN_CTRL_H(v)                   (((v) & GENMASK(9, 8)) >> 8)
#define OV5648_GAIN_CTRL_H_VALUE(v)             (((v) << 8) & GENMASK(9, 8))
#define OV5648_GAIN_CTRL_L_REG                  0x350b
#define OV5648_GAIN_CTRL_L(v)                   ((v) & GENMASK(7, 0))
#define OV5648_GAIN_CTRL_L_VALUE(v)             ((v) & GENMASK(7, 0))

#define OV5648_ANALOG_CTRL0_REG_BASE            0x3600
#define OV5648_ANALOG_CTRL1_REG_BASE            0x3700

#define OV5648_AEC_CTRL0_REG                    0x3a00
#define OV5648_AEC_CTRL0_DEBUG                  BIT(6)
#define OV5648_AEC_CTRL0_DEBAND_EN              BIT(5)
#define OV5648_AEC_CTRL0_DEBAND_LOW_LIMIT_EN    BIT(4)
#define OV5648_AEC_CTRL0_START_SEL_EN           BIT(3)
#define OV5648_AEC_CTRL0_NIGHT_MODE_EN          BIT(2)
#define OV5648_AEC_CTRL0_FREEZE_EN              BIT(0)
#define OV5648_EXPOSURE_MIN_REG                 0x3a01
#define OV5648_EXPOSURE_MAX_60_H_REG            0x3a02
#define OV5648_EXPOSURE_MAX_60_L_REG            0x3a03
#define OV5648_AEC_CTRL5_REG                    0x3a05
#define OV5648_AEC_CTRL6_REG                    0x3a06
#define OV5648_AEC_CTRL7_REG                    0x3a07
#define OV5648_BANDING_STEP_50_H_REG            0x3a08
#define OV5648_BANDING_STEP_50_L_REG            0x3a09
#define OV5648_BANDING_STEP_60_H_REG            0x3a0a
#define OV5648_BANDING_STEP_60_L_REG            0x3a0b
#define OV5648_AEC_CTRLC_REG                    0x3a0c
#define OV5648_BANDING_MAX_60_REG               0x3a0d
#define OV5648_BANDING_MAX_50_REG               0x3a0e
#define OV5648_WPT_REG                          0x3a0f
#define OV5648_BPT_REG                          0x3a10
#define OV5648_VPT_HIGH_REG                     0x3a11
#define OV5648_AVG_MANUAL_REG                   0x3a12
#define OV5648_PRE_GAIN_REG                     0x3a13
#define OV5648_EXPOSURE_MAX_50_H_REG            0x3a14
#define OV5648_EXPOSURE_MAX_50_L_REG            0x3a15
#define OV5648_GAIN_BASE_NIGHT_REG              0x3a17
#define OV5648_AEC_GAIN_CEILING_H_REG           0x3a18
#define OV5648_AEC_GAIN_CEILING_L_REG           0x3a19
#define OV5648_DIFF_MAX_REG                     0x3a1a
#define OV5648_WPT2_REG                         0x3a1b
#define OV5648_LED_ADD_ROW_H_REG                0x3a1c
#define OV5648_LED_ADD_ROW_L_REG                0x3a1d
#define OV5648_BPT2_REG                         0x3a1e
#define OV5648_VPT_LOW_REG                      0x3a1f
#define OV5648_AEC_CTRL20_REG                   0x3a20
#define OV5648_AEC_CTRL21_REG                   0x3a21

#define OV5648_AVG_START_X_H_REG                0x5680
#define OV5648_AVG_START_X_L_REG                0x5681
#define OV5648_AVG_START_Y_H_REG                0x5682
#define OV5648_AVG_START_Y_L_REG                0x5683
#define OV5648_AVG_WINDOW_X_H_REG               0x5684
#define OV5648_AVG_WINDOW_X_L_REG               0x5685
#define OV5648_AVG_WINDOW_Y_H_REG               0x5686
#define OV5648_AVG_WINDOW_Y_L_REG               0x5687
#define OV5648_AVG_WEIGHT00_REG                 0x5688
#define OV5648_AVG_WEIGHT01_REG                 0x5689
#define OV5648_AVG_WEIGHT02_REG                 0x568a
#define OV5648_AVG_WEIGHT03_REG                 0x568b
#define OV5648_AVG_WEIGHT04_REG                 0x568c
#define OV5648_AVG_WEIGHT05_REG                 0x568d
#define OV5648_AVG_WEIGHT06_REG                 0x568e
#define OV5648_AVG_WEIGHT07_REG                 0x568f
#define OV5648_AVG_CTRL10_REG                   0x5690
#define OV5648_AVG_WEIGHT_SUM_REG               0x5691
#define OV5648_AVG_READOUT_REG                  0x5693

#define OV5648_DIG_CTRL0_REG                    0x5a00
#define OV5648_DIG_COMP_MAN_H_REG               0x5a02
#define OV5648_DIG_COMP_MAN_L_REG               0x5a03

#define OV5648_GAINC_MAN_H_REG                  0x5a20
#define OV5648_GAINC_MAN_L_REG                  0x5a21
#define OV5648_GAINC_DGC_MAN_H_REG              0x5a22
#define OV5648_GAINC_DGC_MAN_L_REG              0x5a23
#define OV5648_GAINC_CTRL0_REG                  0x5a24

#define OV5648_GAINF_ANA_NUM_REG                0x5a40
#define OV5648_GAINF_DIG_GAIN_REG               0x5a41

/* Timing */

#define OV5648_CROP_START_X_H_REG               0x3800
#define OV5648_CROP_START_X_H(v)                (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_CROP_START_X_L_REG               0x3801
#define OV5648_CROP_START_X_L(v)                ((v) & GENMASK(7, 0))
#define OV5648_CROP_START_Y_H_REG               0x3802
#define OV5648_CROP_START_Y_H(v)                (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_CROP_START_Y_L_REG               0x3803
#define OV5648_CROP_START_Y_L(v)                ((v) & GENMASK(7, 0))
#define OV5648_CROP_END_X_H_REG                 0x3804
#define OV5648_CROP_END_X_H(v)                  (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_CROP_END_X_L_REG                 0x3805
#define OV5648_CROP_END_X_L(v)                  ((v) & GENMASK(7, 0))
#define OV5648_CROP_END_Y_H_REG                 0x3806
#define OV5648_CROP_END_Y_H(v)                  (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_CROP_END_Y_L_REG                 0x3807
#define OV5648_CROP_END_Y_L(v)                  ((v) & GENMASK(7, 0))
#define OV5648_OUTPUT_SIZE_X_H_REG              0x3808
#define OV5648_OUTPUT_SIZE_X_H(v)               (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_OUTPUT_SIZE_X_L_REG              0x3809
#define OV5648_OUTPUT_SIZE_X_L(v)               ((v) & GENMASK(7, 0))
#define OV5648_OUTPUT_SIZE_Y_H_REG              0x380a
#define OV5648_OUTPUT_SIZE_Y_H(v)               (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_OUTPUT_SIZE_Y_L_REG              0x380b
#define OV5648_OUTPUT_SIZE_Y_L(v)               ((v) & GENMASK(7, 0))
#define OV5648_HTS_H_REG                        0x380c
#define OV5648_HTS_H(v)                         (((v) & GENMASK(12, 8)) >> 8)
#define OV5648_HTS_L_REG                        0x380d
#define OV5648_HTS_L(v)                         ((v) & GENMASK(7, 0))
#define OV5648_VTS_H_REG                        0x380e
#define OV5648_VTS_H(v)                         (((v) & GENMASK(15, 8)) >> 8)
#define OV5648_VTS_L_REG                        0x380f
#define OV5648_VTS_L(v)                         ((v) & GENMASK(7, 0))
#define OV5648_OFFSET_X_H_REG                   0x3810
#define OV5648_OFFSET_X_H(v)                    (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_OFFSET_X_L_REG                   0x3811
#define OV5648_OFFSET_X_L(v)                    ((v) & GENMASK(7, 0))
#define OV5648_OFFSET_Y_H_REG                   0x3812
#define OV5648_OFFSET_Y_H(v)                    (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_OFFSET_Y_L_REG                   0x3813
#define OV5648_OFFSET_Y_L(v)                    ((v) & GENMASK(7, 0))
#define OV5648_SUB_INC_X_REG                    0x3814
#define OV5648_SUB_INC_X_ODD(v)                 (((v) << 4) & GENMASK(7, 4))
#define OV5648_SUB_INC_X_EVEN(v)                ((v) & GENMASK(3, 0))
#define OV5648_SUB_INC_Y_REG                    0x3815
#define OV5648_SUB_INC_Y_ODD(v)                 (((v) << 4) & GENMASK(7, 4))
#define OV5648_SUB_INC_Y_EVEN(v)                ((v) & GENMASK(3, 0))
#define OV5648_HSYNCST_H_REG                    0x3816
#define OV5648_HSYNCST_H(v)                     (((v) >> 8) & 0xf)
#define OV5648_HSYNCST_L_REG                    0x3817
#define OV5648_HSYNCST_L(v)                     ((v) & GENMASK(7, 0))
#define OV5648_HSYNCW_H_REG                     0x3818
#define OV5648_HSYNCW_H(v)                      (((v) >> 8) & 0xf)
#define OV5648_HSYNCW_L_REG                     0x3819
#define OV5648_HSYNCW_L(v)                      ((v) & GENMASK(7, 0))

#define OV5648_TC20_REG                         0x3820
#define OV5648_TC20_DEBUG                       BIT(6)
#define OV5648_TC20_FLIP_VERT_ISP_EN            BIT(2)
#define OV5648_TC20_FLIP_VERT_SENSOR_EN         BIT(1)
#define OV5648_TC20_BINNING_VERT_EN             BIT(0)
#define OV5648_TC21_REG                         0x3821
#define OV5648_TC21_FLIP_HORZ_ISP_EN            BIT(2)
#define OV5648_TC21_FLIP_HORZ_SENSOR_EN         BIT(1)
#define OV5648_TC21_BINNING_HORZ_EN             BIT(0)

/* Strobe/exposure */

#define OV5648_STROBE_REG                       0x3b00
#define OV5648_FREX_EXP_HH_REG                  0x3b01
#define OV5648_SHUTTER_DLY_H_REG                0x3b02
#define OV5648_SHUTTER_DLY_L_REG                0x3b03
#define OV5648_FREX_EXP_H_REG                   0x3b04
#define OV5648_FREX_EXP_L_REG                   0x3b05
#define OV5648_FREX_CTRL_REG                    0x3b06
#define OV5648_FREX_MODE_SEL_REG                0x3b07
#define OV5648_FREX_MODE_SEL_FREX_SA1           BIT(4)
#define OV5648_FREX_MODE_SEL_FX1_FM_EN          BIT(3)
#define OV5648_FREX_MODE_SEL_FREX_INV           BIT(2)
#define OV5648_FREX_MODE_SEL_MODE1              0x0
#define OV5648_FREX_MODE_SEL_MODE2              0x1
#define OV5648_FREX_MODE_SEL_ROLLING            0x2
#define OV5648_FREX_EXP_REQ_REG                 0x3b08
#define OV5648_FREX_SHUTTER_DLY_REG             0x3b09
#define OV5648_FREX_RST_LEN_REG                 0x3b0a
#define OV5648_STROBE_WIDTH_HH_REG              0x3b0b
#define OV5648_STROBE_WIDTH_H_REG               0x3b0c

/* OTP */

#define OV5648_OTP_DATA_REG_BASE                0x3d00
#define OV5648_OTP_PROGRAM_CTRL_REG             0x3d80
#define OV5648_OTP_LOAD_CTRL_REG                0x3d81

/* PSRAM */

#define OV5648_PSRAM_CTRL1_REG                  0x3f01
#define OV5648_PSRAM_CTRLF_REG                  0x3f0f

/* Black Level */

#define OV5648_BLC_CTRL0_REG                    0x4000
#define OV5648_BLC_CTRL1_REG                    0x4001
#define OV5648_BLC_CTRL1_START_LINE(v)          ((v) & GENMASK(5, 0))
#define OV5648_BLC_CTRL2_REG                    0x4002
#define OV5648_BLC_CTRL2_AUTO_EN                BIT(6)
#define OV5648_BLC_CTRL2_RESET_FRAME_NUM(v)     ((v) & GENMASK(5, 0))
#define OV5648_BLC_CTRL3_REG                    0x4003
#define OV5648_BLC_LINE_NUM_REG                 0x4004
#define OV5648_BLC_LINE_NUM(v)                  ((v) & GENMASK(7, 0))
#define OV5648_BLC_CTRL5_REG                    0x4005
#define OV5648_BLC_CTRL5_UPDATE_EN              BIT(1)
#define OV5648_BLC_LEVEL_REG                    0x4009

/* Frame */

#define OV5648_FRAME_CTRL_REG                   0x4200
#define OV5648_FRAME_ON_NUM_REG                 0x4201
#define OV5648_FRAME_OFF_NUM_REG                0x4202

/* MIPI CSI-2 */

#define OV5648_MIPI_CTRL0_REG                   0x4800
#define OV5648_MIPI_CTRL0_CLK_LANE_AUTOGATE     BIT(5)
#define OV5648_MIPI_CTRL0_LANE_SYNC_EN          BIT(4)
#define OV5648_MIPI_CTRL0_LANE_SELECT_LANE1     0
#define OV5648_MIPI_CTRL0_LANE_SELECT_LANE2     BIT(3)
#define OV5648_MIPI_CTRL0_IDLE_LP00             0
#define OV5648_MIPI_CTRL0_IDLE_LP11             BIT(2)

#define OV5648_MIPI_CTRL1_REG                   0x4801
#define OV5648_MIPI_CTRL2_REG                   0x4802
#define OV5648_MIPI_CTRL3_REG                   0x4803
#define OV5648_MIPI_CTRL4_REG                   0x4804
#define OV5648_MIPI_CTRL5_REG                   0x4805
#define OV5648_MIPI_MAX_FRAME_COUNT_H_REG       0x4810
#define OV5648_MIPI_MAX_FRAME_COUNT_L_REG       0x4811
#define OV5648_MIPI_CTRL14_REG                  0x4814
#define OV5648_MIPI_DT_SPKT_REG                 0x4815
#define OV5648_MIPI_HS_ZERO_MIN_H_REG           0x4818
#define OV5648_MIPI_HS_ZERO_MIN_L_REG           0x4819
#define OV5648_MIPI_HS_TRAIN_MIN_H_REG          0x481a
#define OV5648_MIPI_HS_TRAIN_MIN_L_REG          0x481b
#define OV5648_MIPI_CLK_ZERO_MIN_H_REG          0x481c
#define OV5648_MIPI_CLK_ZERO_MIN_L_REG          0x481d
#define OV5648_MIPI_CLK_PREPARE_MIN_H_REG       0x481e
#define OV5648_MIPI_CLK_PREPARE_MIN_L_REG       0x481f
#define OV5648_MIPI_CLK_POST_MIN_H_REG          0x4820
#define OV5648_MIPI_CLK_POST_MIN_L_REG          0x4821
#define OV5648_MIPI_CLK_TRAIL_MIN_H_REG         0x4822
#define OV5648_MIPI_CLK_TRAIL_MIN_L_REG         0x4823
#define OV5648_MIPI_LPX_P_MIN_H_REG             0x4824
#define OV5648_MIPI_LPX_P_MIN_L_REG             0x4825
#define OV5648_MIPI_HS_PREPARE_MIN_H_REG        0x4826
#define OV5648_MIPI_HS_PREPARE_MIN_L_REG        0x4827
#define OV5648_MIPI_HS_EXIT_MIN_H_REG           0x4828
#define OV5648_MIPI_HS_EXIT_MIN_L_REG           0x4829
#define OV5648_MIPI_HS_ZERO_MIN_UI_REG          0x482a
#define OV5648_MIPI_HS_TRAIL_MIN_UI_REG         0x482b
#define OV5648_MIPI_CLK_ZERO_MIN_UI_REG         0x482c
#define OV5648_MIPI_CLK_PREPARE_MIN_UI_REG      0x482d
#define OV5648_MIPI_CLK_POST_MIN_UI_REG         0x482e
#define OV5648_MIPI_CLK_TRAIL_MIN_UI_REG        0x482f
#define OV5648_MIPI_LPX_P_MIN_UI_REG            0x4830
#define OV5648_MIPI_HS_PREPARE_MIN_UI_REG       0x4831
#define OV5648_MIPI_HS_EXIT_MIN_UI_REG          0x4832
#define OV5648_MIPI_REG_MIN_H_REG               0x4833
#define OV5648_MIPI_REG_MIN_L_REG               0x4834
#define OV5648_MIPI_REG_MAX_H_REG               0x4835
#define OV5648_MIPI_REG_MAX_L_REG               0x4836
#define OV5648_MIPI_PCLK_PERIOD_REG             0x4837
#define OV5648_MIPI_WKUP_DLY_REG                0x4838
#define OV5648_MIPI_LP_GPIO_REG                 0x483b
#define OV5648_MIPI_SNR_PCLK_DIV_REG            0x4843

/* ISP */

#define OV5648_ISP_CTRL0_REG                    0x5000
#define OV5648_ISP_CTRL0_BLACK_CORRECT_EN       BIT(2)
#define OV5648_ISP_CTRL0_WHITE_CORRECT_EN       BIT(1)
#define OV5648_ISP_CTRL1_REG                    0x5001
#define OV5648_ISP_CTRL1_AWB_EN                 BIT(0)
#define OV5648_ISP_CTRL2_REG                    0x5002
#define OV5648_ISP_CTRL2_WIN_EN                 BIT(6)
#define OV5648_ISP_CTRL2_OTP_EN                 BIT(1)
#define OV5648_ISP_CTRL2_AWB_GAIN_EN            BIT(0)
#define OV5648_ISP_CTRL3_REG                    0x5003
#define OV5648_ISP_CTRL3_BUF_EN                 BIT(3)
#define OV5648_ISP_CTRL3_BIN_MAN_SET            BIT(2)
#define OV5648_ISP_CTRL3_BIN_AUTO_EN            BIT(1)
#define OV5648_ISP_CTRL4_REG                    0x5004
#define OV5648_ISP_CTRL5_REG                    0x5005
#define OV5648_ISP_CTRL6_REG                    0x5006
#define OV5648_ISP_CTRL7_REG                    0x5007
#define OV5648_ISP_MAN_OFFSET_X_H_REG           0x5008
#define OV5648_ISP_MAN_OFFSET_X_L_REG           0x5009
#define OV5648_ISP_MAN_OFFSET_Y_H_REG           0x500a
#define OV5648_ISP_MAN_OFFSET_Y_L_REG           0x500b
#define OV5648_ISP_MAN_WIN_OFFSET_X_H_REG       0x500c
#define OV5648_ISP_MAN_WIN_OFFSET_X_L_REG       0x500d
#define OV5648_ISP_MAN_WIN_OFFSET_Y_H_REG       0x500e
#define OV5648_ISP_MAN_WIN_OFFSET_Y_L_REG       0x500f
#define OV5648_ISP_MAN_WIN_OUTPUT_X_H_REG       0x5010
#define OV5648_ISP_MAN_WIN_OUTPUT_X_L_REG       0x5011
#define OV5648_ISP_MAN_WIN_OUTPUT_Y_H_REG       0x5012
#define OV5648_ISP_MAN_WIN_OUTPUT_Y_L_REG       0x5013
#define OV5648_ISP_MAN_INPUT_X_H_REG            0x5014
#define OV5648_ISP_MAN_INPUT_X_L_REG            0x5015
#define OV5648_ISP_MAN_INPUT_Y_H_REG            0x5016
#define OV5648_ISP_MAN_INPUT_Y_L_REG            0x5017
#define OV5648_ISP_CTRL18_REG                   0x5018
#define OV5648_ISP_CTRL19_REG                   0x5019
#define OV5648_ISP_CTRL1A_REG                   0x501a
#define OV5648_ISP_CTRL1D_REG                   0x501d
#define OV5648_ISP_CTRL1F_REG                   0x501f
#define OV5648_ISP_CTRL1F_OUTPUT_EN             3
#define OV5648_ISP_CTRL25_REG                   0x5025

#define OV5648_ISP_CTRL3D_REG                   0x503d
#define OV5648_ISP_CTRL3D_PATTERN_EN            BIT(7)
#define OV5648_ISP_CTRL3D_ROLLING_BAR_EN        BIT(6)
#define OV5648_ISP_CTRL3D_TRANSPARENT_MODE      BIT(5)
#define OV5648_ISP_CTRL3D_SQUARES_BW_MODE       BIT(4)
#define OV5648_ISP_CTRL3D_PATTERN_COLOR_BARS    0
#define OV5648_ISP_CTRL3D_PATTERN_RANDOM_DATA   1
#define OV5648_ISP_CTRL3D_PATTERN_COLOR_SQUARES 2
#define OV5648_ISP_CTRL3D_PATTERN_INPUT         3

#define OV5648_ISP_CTRL3E_REG                   0x503e
#define OV5648_ISP_CTRL4B_REG                   0x504b
#define OV5648_ISP_CTRL4B_POST_BIN_H_EN         BIT(5)
#define OV5648_ISP_CTRL4B_POST_BIN_V_EN         BIT(4)
#define OV5648_ISP_CTRL4C_REG                   0x504c
#define OV5648_ISP_CTRL57_REG                   0x5057
#define OV5648_ISP_CTRL58_REG                   0x5058
#define OV5648_ISP_CTRL59_REG                   0x5059

#define OV5648_ISP_WINDOW_START_X_H_REG         0x5980
#define OV5648_ISP_WINDOW_START_X_L_REG         0x5981
#define OV5648_ISP_WINDOW_START_Y_H_REG         0x5982
#define OV5648_ISP_WINDOW_START_Y_L_REG         0x5983
#define OV5648_ISP_WINDOW_WIN_X_H_REG           0x5984
#define OV5648_ISP_WINDOW_WIN_X_L_REG           0x5985
#define OV5648_ISP_WINDOW_WIN_Y_H_REG           0x5986
#define OV5648_ISP_WINDOW_WIN_Y_L_REG           0x5987
#define OV5648_ISP_WINDOW_MAN_REG               0x5988

/* White Balance */

#define OV5648_AWB_CTRL_REG                     0x5180
#define OV5648_AWB_CTRL_FAST_AWB                BIT(6)
#define OV5648_AWB_CTRL_GAIN_FREEZE_EN          BIT(5)
#define OV5648_AWB_CTRL_SUM_FREEZE_EN           BIT(4)
#define OV5648_AWB_CTRL_GAIN_MANUAL_EN          BIT(3)

#define OV5648_AWB_DELTA_REG                    0x5181
#define OV5648_AWB_STABLE_RANGE_REG             0x5182
#define OV5648_AWB_STABLE_RANGE_WIDE_REG        0x5183
#define OV5648_HSIZE_MAN_REG                    0x5185

#define OV5648_GAIN_RED_MAN_H_REG               0x5186
#define OV5648_GAIN_RED_MAN_H(v)                (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_GAIN_RED_MAN_L_REG               0x5187
#define OV5648_GAIN_RED_MAN_L(v)                ((v) & GENMASK(7, 0))
#define OV5648_GAIN_GREEN_MAN_H_REG             0x5188
#define OV5648_GAIN_GREEN_MAN_H(v)              (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_GAIN_GREEN_MAN_L_REG             0x5189
#define OV5648_GAIN_GREEN_MAN_L(v)              ((v) & GENMASK(7, 0))
#define OV5648_GAIN_BLUE_MAN_H_REG              0x518a
#define OV5648_GAIN_BLUE_MAN_H(v)               (((v) & GENMASK(11, 8)) >> 8)
#define OV5648_GAIN_BLUE_MAN_L_REG              0x518b
#define OV5648_GAIN_BLUE_MAN_L(v)               ((v) & GENMASK(7, 0))
#define OV5648_GAIN_RED_LIMIT_REG               0x518c
#define OV5648_GAIN_GREEN_LIMIT_REG             0x518d
#define OV5648_GAIN_BLUE_LIMIT_REG              0x518e
#define OV5648_AWB_FRAME_COUNT_REG              0x518f
#define OV5648_AWB_BASE_MAN_REG                 0x51df

/* Macros */

#define ov5648_subdev_sensor(s) \
        container_of(s, struct ov5648_sensor, subdev)

#define ov5648_ctrl_subdev(c) \
        (&container_of((c)->handler, struct ov5648_sensor, \
                       ctrls.handler)->subdev)

/* Data structures */

struct ov5648_register_value {
        u16 address;
        u8 value;
        unsigned int delay_ms;
};

/*
 * PLL1 Clock Tree:
 *
 * +-< XVCLK
 * |
 * +-+ pll_pre_div (0x3037 [3:0], special values: 5: 1.5, 7: 2.5)
 *   |
 *   +-+ pll_mul (0x3036 [7:0])
 *     |
 *     +-+ sys_div (0x3035 [7:4])
 *       |
 *       +-+ mipi_div (0x3035 [3:0])
 *       | |
 *       | +-> MIPI_SCLK
 *       | |
 *       | +-+ mipi_phy_div (2)
 *       |   |
 *       |   +-> MIPI_CLK
 *       |
 *       +-+ root_div (0x3037 [4])
 *         |
 *         +-+ bit_div (0x3034 [3:0], 8 bits: 2, 10 bits: 2.5, other: 1)
 *           |
 *           +-+ sclk_div (0x3106 [3:2])
 *             |
 *             +-> SCLK
 *             |
 *             +-+ mipi_div (0x3035, 1: PCLK = SCLK)
 *               |
 *               +-> PCLK
 */

struct ov5648_pll1_config {
        unsigned int pll_pre_div;
        unsigned int pll_mul;
        unsigned int sys_div;
        unsigned int root_div;
        unsigned int sclk_div;
        unsigned int mipi_div;
};

/*
 * PLL2 Clock Tree:
 *
 * +-< XVCLK
 * |
 * +-+ plls_pre_div (0x303d [5:4], special values: 0: 1, 1: 1.5)
 *   |
 *   +-+ plls_div_r (0x303d [2])
 *     |
 *     +-+ plls_mul (0x303b [4:0])
 *       |
 *       +-+ sys_div (0x303c [3:0])
 *         |
 *         +-+ sel_div (0x303d [1:0], special values: 0: 1, 3: 2.5)
 *           |
 *           +-> ADCLK
 */

struct ov5648_pll2_config {
        unsigned int plls_pre_div;
        unsigned int plls_div_r;
        unsigned int plls_mul;
        unsigned int sys_div;
        unsigned int sel_div;
};

/*
 * General formulas for (array-centered) mode calculation:
 * - photo_array_width = 2624
 * - crop_start_x = (photo_array_width - output_size_x) / 2
 * - crop_end_x = crop_start_x + offset_x + output_size_x - 1
 *
 * - photo_array_height = 1956
 * - crop_start_y = (photo_array_height - output_size_y) / 2
 * - crop_end_y = crop_start_y + offset_y + output_size_y - 1
 */

struct ov5648_mode {
        unsigned int crop_start_x;
        unsigned int offset_x;
        unsigned int output_size_x;
        unsigned int crop_end_x;
        unsigned int hts;

        unsigned int crop_start_y;
        unsigned int offset_y;
        unsigned int output_size_y;
        unsigned int crop_end_y;
        unsigned int vts;

        bool binning_x;
        bool binning_y;

        unsigned int inc_x_odd;
        unsigned int inc_x_even;
        unsigned int inc_y_odd;
        unsigned int inc_y_even;

        /* 8-bit frame interval followed by 10-bit frame interval. */
        struct v4l2_fract frame_interval[2];

        /* 8-bit config followed by 10-bit config. */
        const struct ov5648_pll1_config *pll1_config[2];
        const struct ov5648_pll2_config *pll2_config;

        const struct ov5648_register_value *register_values;
        unsigned int register_values_count;
};

struct ov5648_state {
        const struct ov5648_mode *mode;
        u32 mbus_code;

        bool streaming;
};

struct ov5648_ctrls {
        struct v4l2_ctrl *exposure_auto;
        struct v4l2_ctrl *exposure;

        struct v4l2_ctrl *gain_auto;
        struct v4l2_ctrl *gain;

        struct v4l2_ctrl *white_balance_auto;
        struct v4l2_ctrl *red_balance;
        struct v4l2_ctrl *blue_balance;

        struct v4l2_ctrl *link_freq;
        struct v4l2_ctrl *pixel_rate;

        struct v4l2_ctrl_handler handler;
};

struct ov5648_sensor {
        struct device *dev;
        struct i2c_client *i2c_client;
        struct gpio_desc *reset;
        struct gpio_desc *powerdown;
        struct regulator *avdd;
        struct regulator *dvdd;
        struct regulator *dovdd;
        struct clk *xvclk;

        struct v4l2_fwnode_endpoint endpoint;
        struct v4l2_subdev subdev;
        struct media_pad pad;

        struct mutex mutex;

        struct ov5648_state state;
        struct ov5648_ctrls ctrls;
};

/* Static definitions */

/*
 * XVCLK = 24 MHz
 * SCLK  = 84 MHz
 * PCLK  = 84 MHz
 */
static const struct ov5648_pll1_config ov5648_pll1_config_native_8_bits = {
        .pll_pre_div    = 3,
        .pll_mul        = 84,
        .sys_div        = 2,
        .root_div       = 1,
        .sclk_div       = 1,
        .mipi_div       = 1,
};

/*
 * XVCLK = 24 MHz
 * SCLK  = 84 MHz
 * PCLK  = 84 MHz
 */
static const struct ov5648_pll1_config ov5648_pll1_config_native_10_bits = {
        .pll_pre_div    = 3,
        .pll_mul        = 105,
        .sys_div        = 2,
        .root_div       = 1,
        .sclk_div       = 1,
        .mipi_div       = 1,
};

/*
 * XVCLK = 24 MHz
 * ADCLK = 200 MHz
 */
static const struct ov5648_pll2_config ov5648_pll2_config_native = {
        .plls_pre_div   = 3,
        .plls_div_r     = 1,
        .plls_mul       = 25,
        .sys_div        = 1,
        .sel_div        = 1,
};

static const struct ov5648_mode ov5648_modes[] = {
        /* 2592x1944 */
        {
                /* Horizontal */
                .crop_start_x   = 16,
                .offset_x       = 0,
                .output_size_x  = 2592,
                .crop_end_x     = 2607,
                .hts            = 2816,

                /* Vertical */
                .crop_start_y   = 6,
                .offset_y       = 0,
                .output_size_y  = 1944,
                .crop_end_y     = 1949,
                .vts            = 1984,

                /* Subsample increase */
                .inc_x_odd      = 1,
                .inc_x_even     = 1,
                .inc_y_odd      = 1,
                .inc_y_even     = 1,

                /* Frame Interval */
                .frame_interval = {
                        { 1,    15 },
                        { 1,    15 },
                },

                /* PLL */
                .pll1_config    = {
                        &ov5648_pll1_config_native_8_bits,
                        &ov5648_pll1_config_native_10_bits,
                },
                .pll2_config    = &ov5648_pll2_config_native,
        },
        /* 1600x1200 (UXGA) */
        {
                /* Horizontal */
                .crop_start_x   = 512,
                .offset_x       = 0,
                .output_size_x  = 1600,
                .crop_end_x     = 2111,
                .hts            = 2816,

                /* Vertical */
                .crop_start_y   = 378,
                .offset_y       = 0,
                .output_size_y  = 1200,
                .crop_end_y     = 1577,
                .vts            = 1984,

                /* Subsample increase */
                .inc_x_odd      = 1,
                .inc_x_even     = 1,
                .inc_y_odd      = 1,
                .inc_y_even     = 1,

                /* Frame Interval */
                .frame_interval = {
                        { 1,    15 },
                        { 1,    15 },
                },

                /* PLL */
                .pll1_config    = {
                        &ov5648_pll1_config_native_8_bits,
                        &ov5648_pll1_config_native_10_bits,
                },
                .pll2_config    = &ov5648_pll2_config_native,
        },
        /* 1920x1080 (Full HD) */
        {
                /* Horizontal */
                .crop_start_x   = 352,
                .offset_x       = 0,
                .output_size_x  = 1920,
                .crop_end_x     = 2271,
                .hts            = 2816,

                /* Vertical */
                .crop_start_y   = 438,
                .offset_y       = 0,
                .output_size_y  = 1080,
                .crop_end_y     = 1517,
                .vts            = 1984,

                /* Subsample increase */
                .inc_x_odd      = 1,
                .inc_x_even     = 1,
                .inc_y_odd      = 1,
                .inc_y_even     = 1,

                /* Frame Interval */
                .frame_interval = {
                        { 1,    15 },
                        { 1,    15 },
                },

                /* PLL */
                .pll1_config    = {
                        &ov5648_pll1_config_native_8_bits,
                        &ov5648_pll1_config_native_10_bits,
                },
                .pll2_config    = &ov5648_pll2_config_native,
        },
        /* 1280x960 */
        {
                /* Horizontal */
                .crop_start_x   = 16,
                .offset_x       = 8,
                .output_size_x  = 1280,
                .crop_end_x     = 2607,
                .hts            = 1912,

                /* Vertical */
                .crop_start_y   = 6,
                .offset_y       = 6,
                .output_size_y  = 960,
                .crop_end_y     = 1949,
                .vts            = 1496,

                /* Binning */
                .binning_x      = true,

                /* Subsample increase */
                .inc_x_odd      = 3,
                .inc_x_even     = 1,
                .inc_y_odd      = 3,
                .inc_y_even     = 1,

                /* Frame Interval */
                .frame_interval = {
                        { 1,    30 },
                        { 1,    30 },
                },

                /* PLL */
                .pll1_config    = {
                        &ov5648_pll1_config_native_8_bits,
                        &ov5648_pll1_config_native_10_bits,
                },
                .pll2_config    = &ov5648_pll2_config_native,
        },
        /* 1280x720 (HD) */
        {
                /* Horizontal */
                .crop_start_x   = 16,
                .offset_x       = 8,
                .output_size_x  = 1280,
                .crop_end_x     = 2607,
                .hts            = 1912,

                /* Vertical */
                .crop_start_y   = 254,
                .offset_y       = 2,
                .output_size_y  = 720,
                .crop_end_y     = 1701,
                .vts            = 1496,

                /* Binning */
                .binning_x      = true,

                /* Subsample increase */
                .inc_x_odd      = 3,
                .inc_x_even     = 1,
                .inc_y_odd      = 3,
                .inc_y_even     = 1,

                /* Frame Interval */
                .frame_interval = {
                        { 1,    30 },
                        { 1,    30 },
                },

                /* PLL */
                .pll1_config    = {
                        &ov5648_pll1_config_native_8_bits,
                        &ov5648_pll1_config_native_10_bits,
                },
                .pll2_config    = &ov5648_pll2_config_native,
        },
        /* 640x480 (VGA) */
        {
                /* Horizontal */
                .crop_start_x   = 0,
                .offset_x       = 8,
                .output_size_x  = 640,
                .crop_end_x     = 2623,
                .hts            = 1896,

                /* Vertical */
                .crop_start_y   = 0,
                .offset_y       = 2,
                .output_size_y  = 480,
                .crop_end_y     = 1953,
                .vts            = 984,

                /* Binning */
                .binning_x      = true,

                /* Subsample increase */
                .inc_x_odd      = 7,
                .inc_x_even     = 1,
                .inc_y_odd      = 7,
                .inc_y_even     = 1,

                /* Frame Interval */
                .frame_interval = {
                        { 1,    30 },
                        { 1,    30 },
                },

                /* PLL */
                .pll1_config    = {
                        &ov5648_pll1_config_native_8_bits,
                        &ov5648_pll1_config_native_10_bits,
                },
                .pll2_config    = &ov5648_pll2_config_native,
        },
};

static const u32 ov5648_mbus_codes[] = {
        MEDIA_BUS_FMT_SBGGR8_1X8,
        MEDIA_BUS_FMT_SBGGR10_1X10,
};

static const struct ov5648_register_value ov5648_init_sequence[] = {
        /* PSRAM */
        { OV5648_PSRAM_CTRL1_REG, 0x0d },
        { OV5648_PSRAM_CTRLF_REG, 0xf5 },
};

static const s64 ov5648_link_freq_menu[] = {
        210000000,
        168000000,
};

static const char *const ov5648_test_pattern_menu[] = {
        "Disabled",
        "Random data",
        "Color bars",
        "Color bars with rolling bar",
        "Color squares",
        "Color squares with rolling bar"
};

static const u8 ov5648_test_pattern_bits[] = {
        0,
        OV5648_ISP_CTRL3D_PATTERN_EN | OV5648_ISP_CTRL3D_PATTERN_RANDOM_DATA,
        OV5648_ISP_CTRL3D_PATTERN_EN | OV5648_ISP_CTRL3D_PATTERN_COLOR_BARS,
        OV5648_ISP_CTRL3D_PATTERN_EN | OV5648_ISP_CTRL3D_ROLLING_BAR_EN |
        OV5648_ISP_CTRL3D_PATTERN_COLOR_BARS,
        OV5648_ISP_CTRL3D_PATTERN_EN | OV5648_ISP_CTRL3D_PATTERN_COLOR_SQUARES,
        OV5648_ISP_CTRL3D_PATTERN_EN | OV5648_ISP_CTRL3D_ROLLING_BAR_EN |
        OV5648_ISP_CTRL3D_PATTERN_COLOR_SQUARES,
};

/* Input/Output */

static int ov5648_read(struct ov5648_sensor *sensor, u16 address, u8 *value)
{
        unsigned char data[2] = { address >> 8, address & 0xff };
        struct i2c_client *client = sensor->i2c_client;
        int ret;

        ret = i2c_master_send(client, data, sizeof(data));
        if (ret < 0) {
                dev_dbg(&client->dev, "i2c send error at address %#04x\n",
                        address);
                return ret;
        }

        ret = i2c_master_recv(client, value, 1);
        if (ret < 0) {
                dev_dbg(&client->dev, "i2c recv error at address %#04x\n",
                        address);
                return ret;
        }

        return 0;
}

static int ov5648_write(struct ov5648_sensor *sensor, u16 address, u8 value)
{
        unsigned char data[3] = { address >> 8, address & 0xff, value };
        struct i2c_client *client = sensor->i2c_client;
        int ret;

        ret = i2c_master_send(client, data, sizeof(data));
        if (ret < 0) {
                dev_dbg(&client->dev, "i2c send error at address %#04x\n",
                        address);
                return ret;
        }

        return 0;
}

static int ov5648_write_sequence(struct ov5648_sensor *sensor,
                                 const struct ov5648_register_value *sequence,
                                 unsigned int sequence_count)
{
        unsigned int i;
        int ret = 0;

        for (i = 0; i < sequence_count; i++) {
                ret = ov5648_write(sensor, sequence[i].address,
                                   sequence[i].value);
                if (ret)
                        break;

                if (sequence[i].delay_ms)
                        msleep(sequence[i].delay_ms);
        }

        return ret;
}

static int ov5648_update_bits(struct ov5648_sensor *sensor, u16 address,
                              u8 mask, u8 bits)
{
        u8 value = 0;
        int ret;

        ret = ov5648_read(sensor, address, &value);
        if (ret)
                return ret;

        value &= ~mask;
        value |= bits;

        ret = ov5648_write(sensor, address, value);
        if (ret)
                return ret;

        return 0;
}

/* Sensor */

static int ov5648_sw_reset(struct ov5648_sensor *sensor)
{
        return ov5648_write(sensor, OV5648_SW_RESET_REG, OV5648_SW_RESET_RESET);
}

static int ov5648_sw_standby(struct ov5648_sensor *sensor, int standby)
{
        u8 value = 0;

        if (!standby)
                value = OV5648_SW_STANDBY_STREAM_ON;

        return ov5648_write(sensor, OV5648_SW_STANDBY_REG, value);
}

static int ov5648_chip_id_check(struct ov5648_sensor *sensor)
{
        u16 regs[] = { OV5648_CHIP_ID_H_REG, OV5648_CHIP_ID_L_REG };
        u8 values[] = { OV5648_CHIP_ID_H_VALUE, OV5648_CHIP_ID_L_VALUE };
        unsigned int i;
        u8 value;
        int ret;

        for (i = 0; i < ARRAY_SIZE(regs); i++) {
                ret = ov5648_read(sensor, regs[i], &value);
                if (ret < 0)
                        return ret;

                if (value != values[i]) {
                        dev_err(sensor->dev,
                                "chip id value mismatch: %#x instead of %#x\n",
                                value, values[i]);
                        return -EINVAL;
                }
        }

        return 0;
}

static int ov5648_avdd_internal_power(struct ov5648_sensor *sensor, int on)
{
        return ov5648_write(sensor, OV5648_A_PWC_PK_O0_REG,
                            on ? 0 : OV5648_A_PWC_PK_O0_BP_REGULATOR_N);
}

static int ov5648_pad_configure(struct ov5648_sensor *sensor)
{
        int ret;

        /* Configure pads as input. */

        ret = ov5648_write(sensor, OV5648_PAD_OEN1_REG, 0);
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_PAD_OEN2_REG, 0);
        if (ret)
                return ret;

        /* Disable FREX pin. */

        return ov5648_write(sensor, OV5648_PAD_PK_REG,
                            OV5648_PAD_PK_DRIVE_STRENGTH_1X |
                            OV5648_PAD_PK_FREX_N);
}

static int ov5648_mipi_configure(struct ov5648_sensor *sensor)
{
        struct v4l2_mbus_config_mipi_csi2 *bus_mipi_csi2 =
                &sensor->endpoint.bus.mipi_csi2;
        unsigned int lanes_count = bus_mipi_csi2->num_data_lanes;
        int ret;

        ret = ov5648_write(sensor, OV5648_MIPI_CTRL0_REG,
                           OV5648_MIPI_CTRL0_CLK_LANE_AUTOGATE |
                           OV5648_MIPI_CTRL0_LANE_SELECT_LANE1 |
                           OV5648_MIPI_CTRL0_IDLE_LP11);
        if (ret)
                return ret;

        return ov5648_write(sensor, OV5648_MIPI_SC_CTRL0_REG,
                            OV5648_MIPI_SC_CTRL0_MIPI_LANES(lanes_count) |
                            OV5648_MIPI_SC_CTRL0_PHY_LP_RX_PD |
                            OV5648_MIPI_SC_CTRL0_MIPI_EN);
}

static int ov5648_black_level_configure(struct ov5648_sensor *sensor)
{
        int ret;

        /* Up to 6 lines are available for black level calibration. */

        ret = ov5648_write(sensor, OV5648_BLC_CTRL1_REG,
                           OV5648_BLC_CTRL1_START_LINE(2));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_BLC_CTRL2_REG,
                           OV5648_BLC_CTRL2_AUTO_EN |
                           OV5648_BLC_CTRL2_RESET_FRAME_NUM(5));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_BLC_LINE_NUM_REG,
                           OV5648_BLC_LINE_NUM(4));
        if (ret)
                return ret;

        return ov5648_update_bits(sensor, OV5648_BLC_CTRL5_REG,
                                  OV5648_BLC_CTRL5_UPDATE_EN,
                                  OV5648_BLC_CTRL5_UPDATE_EN);
}

static int ov5648_isp_configure(struct ov5648_sensor *sensor)
{
        u8 bits;
        int ret;

        /* Enable black and white level correction. */
        bits = OV5648_ISP_CTRL0_BLACK_CORRECT_EN |
               OV5648_ISP_CTRL0_WHITE_CORRECT_EN;

        ret = ov5648_update_bits(sensor, OV5648_ISP_CTRL0_REG, bits, bits);
        if (ret)
                return ret;

        /* Enable AWB. */
        ret = ov5648_write(sensor, OV5648_ISP_CTRL1_REG,
                           OV5648_ISP_CTRL1_AWB_EN);
        if (ret)
                return ret;

        /* Enable AWB gain and windowing. */
        ret = ov5648_write(sensor, OV5648_ISP_CTRL2_REG,
                           OV5648_ISP_CTRL2_WIN_EN |
                           OV5648_ISP_CTRL2_AWB_GAIN_EN);
        if (ret)
                return ret;

        /* Enable buffering and auto-binning. */
        ret = ov5648_write(sensor, OV5648_ISP_CTRL3_REG,
                           OV5648_ISP_CTRL3_BUF_EN |
                           OV5648_ISP_CTRL3_BIN_AUTO_EN);
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_ISP_CTRL4_REG, 0);
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_ISP_CTRL1F_REG,
                           OV5648_ISP_CTRL1F_OUTPUT_EN);
        if (ret)
                return ret;

        /* Enable post-binning filters. */
        ret = ov5648_write(sensor, OV5648_ISP_CTRL4B_REG,
                           OV5648_ISP_CTRL4B_POST_BIN_H_EN |
                           OV5648_ISP_CTRL4B_POST_BIN_V_EN);
        if (ret)
                return ret;

        /* Disable debanding and night mode. Debug bit seems necessary. */
        ret = ov5648_write(sensor, OV5648_AEC_CTRL0_REG,
                           OV5648_AEC_CTRL0_DEBUG |
                           OV5648_AEC_CTRL0_START_SEL_EN);
        if (ret)
                return ret;

        return ov5648_write(sensor, OV5648_MANUAL_CTRL_REG,
                            OV5648_MANUAL_CTRL_FRAME_DELAY(1));
}

static unsigned long ov5648_mode_pll1_rate(struct ov5648_sensor *sensor,
                                           const struct ov5648_pll1_config *config)
{
        unsigned long xvclk_rate;
        unsigned long pll1_rate;

        xvclk_rate = clk_get_rate(sensor->xvclk);
        pll1_rate = xvclk_rate * config->pll_mul;

        switch (config->pll_pre_div) {
        case 5:
                pll1_rate *= 3;
                pll1_rate /= 2;
                break;
        case 7:
                pll1_rate *= 5;
                pll1_rate /= 2;
                break;
        default:
                pll1_rate /= config->pll_pre_div;
                break;
        }

        return pll1_rate;
}

static int ov5648_mode_pll1_configure(struct ov5648_sensor *sensor,
                                      const struct ov5648_mode *mode,
                                      u32 mbus_code)
{
        const struct ov5648_pll1_config *config;
        u8 value;
        int ret;

        value = OV5648_PLL_CTRL0_PLL_CHARGE_PUMP(1);

        switch (mbus_code) {
        case MEDIA_BUS_FMT_SBGGR8_1X8:
                config = mode->pll1_config[0];
                value |= OV5648_PLL_CTRL0_BITS(8);
                break;
        case MEDIA_BUS_FMT_SBGGR10_1X10:
                config = mode->pll1_config[1];
                value |= OV5648_PLL_CTRL0_BITS(10);
                break;
        default:
                return -EINVAL;
        }

        ret = ov5648_write(sensor, OV5648_PLL_CTRL0_REG, value);
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_PLL_DIV_REG,
                           OV5648_PLL_DIV_ROOT_DIV(config->root_div) |
                           OV5648_PLL_DIV_PLL_PRE_DIV(config->pll_pre_div));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_PLL_MUL_REG,
                           OV5648_PLL_MUL(config->pll_mul));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_PLL_CTRL1_REG,
                           OV5648_PLL_CTRL1_SYS_DIV(config->sys_div) |
                           OV5648_PLL_CTRL1_MIPI_DIV(config->mipi_div));
        if (ret)
                return ret;

        return ov5648_write(sensor, OV5648_SRB_CTRL_REG,
                            OV5648_SRB_CTRL_SCLK_DIV(config->sclk_div) |
                            OV5648_SRB_CTRL_SCLK_ARBITER_EN);
}

static int ov5648_mode_pll2_configure(struct ov5648_sensor *sensor,
                                      const struct ov5648_mode *mode)
{
        const struct ov5648_pll2_config *config = mode->pll2_config;
        int ret;

        ret = ov5648_write(sensor, OV5648_PLLS_DIV_REG,
                           OV5648_PLLS_DIV_PLLS_PRE_DIV(config->plls_pre_div) |
                           OV5648_PLLS_DIV_PLLS_DIV_R(config->plls_div_r) |
                           OV5648_PLLS_DIV_PLLS_SEL_DIV(config->sel_div));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_PLLS_MUL_REG,
                           OV5648_PLLS_MUL(config->plls_mul));
        if (ret)
                return ret;

        return ov5648_write(sensor, OV5648_PLLS_CTRL_REG,
                            OV5648_PLLS_CTRL_PLL_CHARGE_PUMP(1) |
                            OV5648_PLLS_CTRL_SYS_DIV(config->sys_div));
}

static int ov5648_mode_configure(struct ov5648_sensor *sensor,
                                 const struct ov5648_mode *mode, u32 mbus_code)
{
        int ret;

        /* Crop Start X */

        ret = ov5648_write(sensor, OV5648_CROP_START_X_H_REG,
                           OV5648_CROP_START_X_H(mode->crop_start_x));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_CROP_START_X_L_REG,
                           OV5648_CROP_START_X_L(mode->crop_start_x));
        if (ret)
                return ret;

        /* Offset X */

        ret = ov5648_write(sensor, OV5648_OFFSET_X_H_REG,
                           OV5648_OFFSET_X_H(mode->offset_x));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_OFFSET_X_L_REG,
                           OV5648_OFFSET_X_L(mode->offset_x));
        if (ret)
                return ret;

        /* Output Size X */

        ret = ov5648_write(sensor, OV5648_OUTPUT_SIZE_X_H_REG,
                           OV5648_OUTPUT_SIZE_X_H(mode->output_size_x));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_OUTPUT_SIZE_X_L_REG,
                           OV5648_OUTPUT_SIZE_X_L(mode->output_size_x));
        if (ret)
                return ret;

        /* Crop End X */

        ret = ov5648_write(sensor, OV5648_CROP_END_X_H_REG,
                           OV5648_CROP_END_X_H(mode->crop_end_x));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_CROP_END_X_L_REG,
                           OV5648_CROP_END_X_L(mode->crop_end_x));
        if (ret)
                return ret;

        /* Horizontal Total Size */

        ret = ov5648_write(sensor, OV5648_HTS_H_REG, OV5648_HTS_H(mode->hts));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_HTS_L_REG, OV5648_HTS_L(mode->hts));
        if (ret)
                return ret;

        /* Crop Start Y */

        ret = ov5648_write(sensor, OV5648_CROP_START_Y_H_REG,
                           OV5648_CROP_START_Y_H(mode->crop_start_y));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_CROP_START_Y_L_REG,
                           OV5648_CROP_START_Y_L(mode->crop_start_y));
        if (ret)
                return ret;

        /* Offset Y */

        ret = ov5648_write(sensor, OV5648_OFFSET_Y_H_REG,
                           OV5648_OFFSET_Y_H(mode->offset_y));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_OFFSET_Y_L_REG,
                           OV5648_OFFSET_Y_L(mode->offset_y));
        if (ret)
                return ret;

        /* Output Size Y */

        ret = ov5648_write(sensor, OV5648_OUTPUT_SIZE_Y_H_REG,
                           OV5648_OUTPUT_SIZE_Y_H(mode->output_size_y));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_OUTPUT_SIZE_Y_L_REG,
                           OV5648_OUTPUT_SIZE_Y_L(mode->output_size_y));
        if (ret)
                return ret;

        /* Crop End Y */

        ret = ov5648_write(sensor, OV5648_CROP_END_Y_H_REG,
                           OV5648_CROP_END_Y_H(mode->crop_end_y));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_CROP_END_Y_L_REG,
                           OV5648_CROP_END_Y_L(mode->crop_end_y));
        if (ret)
                return ret;

        /* Vertical Total Size */

        ret = ov5648_write(sensor, OV5648_VTS_H_REG, OV5648_VTS_H(mode->vts));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_VTS_L_REG, OV5648_VTS_L(mode->vts));
        if (ret)
                return ret;

        /* Flip/Mirror/Binning */

        /*
         * A debug bit is enabled by default and needs to be cleared for
         * subsampling to work.
         */
        ret = ov5648_update_bits(sensor, OV5648_TC20_REG,
                                 OV5648_TC20_DEBUG |
                                 OV5648_TC20_BINNING_VERT_EN,
                                 mode->binning_y ? OV5648_TC20_BINNING_VERT_EN :
                                 0);
        if (ret)
                return ret;

        ret = ov5648_update_bits(sensor, OV5648_TC21_REG,
                                 OV5648_TC21_BINNING_HORZ_EN,
                                 mode->binning_x ? OV5648_TC21_BINNING_HORZ_EN :
                                 0);
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_SUB_INC_X_REG,
                           OV5648_SUB_INC_X_ODD(mode->inc_x_odd) |
                           OV5648_SUB_INC_X_EVEN(mode->inc_x_even));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_SUB_INC_Y_REG,
                           OV5648_SUB_INC_Y_ODD(mode->inc_y_odd) |
                           OV5648_SUB_INC_Y_EVEN(mode->inc_y_even));
        if (ret)
                return ret;

        /* PLLs */

        ret = ov5648_mode_pll1_configure(sensor, mode, mbus_code);
        if (ret)
                return ret;

        ret = ov5648_mode_pll2_configure(sensor, mode);
        if (ret)
                return ret;

        /* Extra registers */

        if (mode->register_values) {
                ret = ov5648_write_sequence(sensor, mode->register_values,
                                            mode->register_values_count);
                if (ret)
                        return ret;
        }

        return 0;
}

static unsigned long ov5648_mode_mipi_clk_rate(struct ov5648_sensor *sensor,
                                               const struct ov5648_mode *mode,
                                               u32 mbus_code)
{
        const struct ov5648_pll1_config *config;
        unsigned long pll1_rate;

        switch (mbus_code) {
        case MEDIA_BUS_FMT_SBGGR8_1X8:
                config = mode->pll1_config[0];
                break;
        case MEDIA_BUS_FMT_SBGGR10_1X10:
                config = mode->pll1_config[1];
                break;
        default:
                return 0;
        }

        pll1_rate = ov5648_mode_pll1_rate(sensor, config);

        return pll1_rate / config->sys_div / config->mipi_div / 2;
}

/* Exposure */

static int ov5648_exposure_auto_configure(struct ov5648_sensor *sensor,
                                          bool enable)
{
        return ov5648_update_bits(sensor, OV5648_MANUAL_CTRL_REG,
                                  OV5648_MANUAL_CTRL_AEC_MANUAL_EN,
                                  enable ? 0 : OV5648_MANUAL_CTRL_AEC_MANUAL_EN);
}

static int ov5648_exposure_configure(struct ov5648_sensor *sensor, u32 exposure)
{
        struct ov5648_ctrls *ctrls = &sensor->ctrls;
        int ret;

        if (ctrls->exposure_auto->val != V4L2_EXPOSURE_MANUAL)
                return -EINVAL;

        ret = ov5648_write(sensor, OV5648_EXPOSURE_CTRL_HH_REG,
                           OV5648_EXPOSURE_CTRL_HH(exposure));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_EXPOSURE_CTRL_H_REG,
                           OV5648_EXPOSURE_CTRL_H(exposure));
        if (ret)
                return ret;

        return ov5648_write(sensor, OV5648_EXPOSURE_CTRL_L_REG,
                            OV5648_EXPOSURE_CTRL_L(exposure));
}

static int ov5648_exposure_value(struct ov5648_sensor *sensor,
                                 u32 *exposure)
{
        u8 exposure_hh = 0, exposure_h = 0, exposure_l = 0;
        int ret;

        ret = ov5648_read(sensor, OV5648_EXPOSURE_CTRL_HH_REG, &exposure_hh);
        if (ret)
                return ret;

        ret = ov5648_read(sensor, OV5648_EXPOSURE_CTRL_H_REG, &exposure_h);
        if (ret)
                return ret;

        ret = ov5648_read(sensor, OV5648_EXPOSURE_CTRL_L_REG, &exposure_l);
        if (ret)
                return ret;

        *exposure = OV5648_EXPOSURE_CTRL_HH_VALUE((u32)exposure_hh) |
                    OV5648_EXPOSURE_CTRL_H_VALUE((u32)exposure_h) |
                    OV5648_EXPOSURE_CTRL_L_VALUE((u32)exposure_l);

        return 0;
}

/* Gain */

static int ov5648_gain_auto_configure(struct ov5648_sensor *sensor, bool enable)
{
        return ov5648_update_bits(sensor, OV5648_MANUAL_CTRL_REG,
                                  OV5648_MANUAL_CTRL_AGC_MANUAL_EN,
                                  enable ? 0 : OV5648_MANUAL_CTRL_AGC_MANUAL_EN);
}

static int ov5648_gain_configure(struct ov5648_sensor *sensor, u32 gain)
{
        struct ov5648_ctrls *ctrls = &sensor->ctrls;
        int ret;

        if (ctrls->gain_auto->val)
                return -EINVAL;

        ret = ov5648_write(sensor, OV5648_GAIN_CTRL_H_REG,
                           OV5648_GAIN_CTRL_H(gain));
        if (ret)
                return ret;

        return ov5648_write(sensor, OV5648_GAIN_CTRL_L_REG,
                            OV5648_GAIN_CTRL_L(gain));
}

static int ov5648_gain_value(struct ov5648_sensor *sensor, u32 *gain)
{
        u8 gain_h = 0, gain_l = 0;
        int ret;

        ret = ov5648_read(sensor, OV5648_GAIN_CTRL_H_REG, &gain_h);
        if (ret)
                return ret;

        ret = ov5648_read(sensor, OV5648_GAIN_CTRL_L_REG, &gain_l);
        if (ret)
                return ret;

        *gain = OV5648_GAIN_CTRL_H_VALUE((u32)gain_h) |
                OV5648_GAIN_CTRL_L_VALUE((u32)gain_l);

        return 0;
}

/* White Balance */

static int ov5648_white_balance_auto_configure(struct ov5648_sensor *sensor,
                                               bool enable)
{
        return ov5648_write(sensor, OV5648_AWB_CTRL_REG,
                            enable ? 0 : OV5648_AWB_CTRL_GAIN_MANUAL_EN);
}

static int ov5648_white_balance_configure(struct ov5648_sensor *sensor,
                                          u32 red_balance, u32 blue_balance)
{
        struct ov5648_ctrls *ctrls = &sensor->ctrls;
        int ret;

        if (ctrls->white_balance_auto->val)
                return -EINVAL;

        ret = ov5648_write(sensor, OV5648_GAIN_RED_MAN_H_REG,
                           OV5648_GAIN_RED_MAN_H(red_balance));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_GAIN_RED_MAN_L_REG,
                           OV5648_GAIN_RED_MAN_L(red_balance));
        if (ret)
                return ret;

        ret = ov5648_write(sensor, OV5648_GAIN_BLUE_MAN_H_REG,
                           OV5648_GAIN_BLUE_MAN_H(blue_balance));
        if (ret)
                return ret;

        return ov5648_write(sensor, OV5648_GAIN_BLUE_MAN_L_REG,
                            OV5648_GAIN_BLUE_MAN_L(blue_balance));
}

/* Flip */

static int ov5648_flip_vert_configure(struct ov5648_sensor *sensor, bool enable)
{
        u8 bits = OV5648_TC20_FLIP_VERT_ISP_EN |
                  OV5648_TC20_FLIP_VERT_SENSOR_EN;

        return ov5648_update_bits(sensor, OV5648_TC20_REG, bits,
                                  enable ? bits : 0);
}

static int ov5648_flip_horz_configure(struct ov5648_sensor *sensor, bool enable)
{
        u8 bits = OV5648_TC21_FLIP_HORZ_ISP_EN |
                  OV5648_TC21_FLIP_HORZ_SENSOR_EN;

        return ov5648_update_bits(sensor, OV5648_TC21_REG, bits,
                                  enable ? bits : 0);
}

/* Test Pattern */

static int ov5648_test_pattern_configure(struct ov5648_sensor *sensor,
                                         unsigned int index)
{
        if (index >= ARRAY_SIZE(ov5648_test_pattern_bits))
                return -EINVAL;

        return ov5648_write(sensor, OV5648_ISP_CTRL3D_REG,
                            ov5648_test_pattern_bits[index]);
}

/* State */

static int ov5648_state_mipi_configure(struct ov5648_sensor *sensor,
                                       const struct ov5648_mode *mode,
                                       u32 mbus_code)
{
        struct ov5648_ctrls *ctrls = &sensor->ctrls;
        struct v4l2_mbus_config_mipi_csi2 *bus_mipi_csi2 =
                &sensor->endpoint.bus.mipi_csi2;
        unsigned long mipi_clk_rate;
        unsigned int bits_per_sample;
        unsigned int lanes_count;
        unsigned int i, j;
        s64 mipi_pixel_rate;

        mipi_clk_rate = ov5648_mode_mipi_clk_rate(sensor, mode, mbus_code);
        if (!mipi_clk_rate)
                return -EINVAL;

        for (i = 0; i < ARRAY_SIZE(ov5648_link_freq_menu); i++) {
                s64 freq = ov5648_link_freq_menu[i];

                if (freq == mipi_clk_rate)
                        break;
        }

        for (j = 0; j < sensor->endpoint.nr_of_link_frequencies; j++) {
                u64 freq = sensor->endpoint.link_frequencies[j];

                if (freq == mipi_clk_rate)
                        break;
        }

        if (i == ARRAY_SIZE(ov5648_link_freq_menu)) {
                dev_err(sensor->dev,
                        "failed to find %lu clk rate in link freq\n",
                        mipi_clk_rate);
        } else if (j == sensor->endpoint.nr_of_link_frequencies) {
                dev_err(sensor->dev,
                        "failed to find %lu clk rate in endpoint link-frequencies\n",
                        mipi_clk_rate);
        } else {
                __v4l2_ctrl_s_ctrl(ctrls->link_freq, i);
        }

        switch (mbus_code) {
        case MEDIA_BUS_FMT_SBGGR8_1X8:
                bits_per_sample = 8;
                break;
        case MEDIA_BUS_FMT_SBGGR10_1X10:
                bits_per_sample = 10;
                break;
        default:
                return -EINVAL;
        }

        lanes_count = bus_mipi_csi2->num_data_lanes;
        mipi_pixel_rate = mipi_clk_rate * 2 * lanes_count / bits_per_sample;

        __v4l2_ctrl_s_ctrl_int64(ctrls->pixel_rate, mipi_pixel_rate);

        return 0;
}

static int ov5648_state_configure(struct ov5648_sensor *sensor,
                                  const struct ov5648_mode *mode,
                                  u32 mbus_code)
{
        int ret;

        if (sensor->state.streaming)
                return -EBUSY;

        /* State will be configured at first power on otherwise. */
        if (pm_runtime_enabled(sensor->dev) &&
            !pm_runtime_suspended(sensor->dev)) {
                ret = ov5648_mode_configure(sensor, mode, mbus_code);
                if (ret)
                        return ret;
        }

        ret = ov5648_state_mipi_configure(sensor, mode, mbus_code);
        if (ret)
                return ret;

        sensor->state.mode = mode;
        sensor->state.mbus_code = mbus_code;

        return 0;
}

static int ov5648_state_init(struct ov5648_sensor *sensor)
{
        int ret;

        mutex_lock(&sensor->mutex);
        ret = ov5648_state_configure(sensor, &ov5648_modes[0],
                                     ov5648_mbus_codes[0]);
        mutex_unlock(&sensor->mutex);

        return ret;
}

/* Sensor Base */

static int ov5648_sensor_init(struct ov5648_sensor *sensor)
{
        int ret;

        ret = ov5648_sw_reset(sensor);
        if (ret) {
                dev_err(sensor->dev, "failed to perform sw reset\n");
                return ret;
        }

        ret = ov5648_sw_standby(sensor, 1);
        if (ret) {
                dev_err(sensor->dev, "failed to set sensor standby\n");
                return ret;
        }

        ret = ov5648_chip_id_check(sensor);
        if (ret) {
                dev_err(sensor->dev, "failed to check sensor chip id\n");
                return ret;
        }

        ret = ov5648_avdd_internal_power(sensor, !sensor->avdd);
        if (ret) {
                dev_err(sensor->dev, "failed to set internal avdd power\n");
                return ret;
        }

        ret = ov5648_write_sequence(sensor, ov5648_init_sequence,
                                    ARRAY_SIZE(ov5648_init_sequence));
        if (ret) {
                dev_err(sensor->dev, "failed to write init sequence\n");
                return ret;
        }

        ret = ov5648_pad_configure(sensor);
        if (ret) {
                dev_err(sensor->dev, "failed to configure pad\n");
                return ret;
        }

        ret = ov5648_mipi_configure(sensor);
        if (ret) {
                dev_err(sensor->dev, "failed to configure MIPI\n");
                return ret;
        }

        ret = ov5648_isp_configure(sensor);
        if (ret) {
                dev_err(sensor->dev, "failed to configure ISP\n");
                return ret;
        }

        ret = ov5648_black_level_configure(sensor);
        if (ret) {
                dev_err(sensor->dev, "failed to configure black level\n");
                return ret;
        }

        /* Configure current mode. */
        ret = ov5648_state_configure(sensor, sensor->state.mode,
                                     sensor->state.mbus_code);
        if (ret) {
                dev_err(sensor->dev, "failed to configure state\n");
                return ret;
        }

        return 0;
}

static int ov5648_sensor_power(struct ov5648_sensor *sensor, bool on)
{
        /* Keep initialized to zero for disable label. */
        int ret = 0;

        /*
         * General notes about the power sequence:
         * - power-down GPIO must be active (low) during power-on;
         * - reset GPIO state does not matter during power-on;
         * - XVCLK must be provided 1 ms before register access;
         * - 10 ms are needed between power-down deassert and register access.
         */

        /* Note that regulator-and-GPIO-based power is untested. */
        if (on) {
                gpiod_set_value_cansleep(sensor->reset, 1);
                gpiod_set_value_cansleep(sensor->powerdown, 1);

                ret = regulator_enable(sensor->dovdd);
                if (ret) {
                        dev_err(sensor->dev,
                                "failed to enable DOVDD regulator\n");
                        goto disable;
                }

                if (sensor->avdd) {
                        ret = regulator_enable(sensor->avdd);
                        if (ret) {
                                dev_err(sensor->dev,
                                        "failed to enable AVDD regulator\n");
                                goto disable;
                        }
                }

                ret = regulator_enable(sensor->dvdd);
                if (ret) {
                        dev_err(sensor->dev,
                                "failed to enable DVDD regulator\n");
                        goto disable;
                }

                /* According to OV5648 power up diagram. */
                usleep_range(5000, 10000);

                ret = clk_prepare_enable(sensor->xvclk);
                if (ret) {
                        dev_err(sensor->dev, "failed to enable XVCLK clock\n");
                        goto disable;
                }

                gpiod_set_value_cansleep(sensor->reset, 0);
                gpiod_set_value_cansleep(sensor->powerdown, 0);

                usleep_range(20000, 25000);
        } else {
disable:
                gpiod_set_value_cansleep(sensor->powerdown, 1);
                gpiod_set_value_cansleep(sensor->reset, 1);

                clk_disable_unprepare(sensor->xvclk);

                regulator_disable(sensor->dvdd);

                if (sensor->avdd)
                        regulator_disable(sensor->avdd);

                regulator_disable(sensor->dovdd);
        }

        return ret;
}

/* Controls */

static int ov5648_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
        struct v4l2_subdev *subdev = ov5648_ctrl_subdev(ctrl);
        struct ov5648_sensor *sensor = ov5648_subdev_sensor(subdev);
        struct ov5648_ctrls *ctrls = &sensor->ctrls;
        int ret;

        switch (ctrl->id) {
        case V4L2_CID_EXPOSURE_AUTO:
                ret = ov5648_exposure_value(sensor, &ctrls->exposure->val);
                if (ret)
                        return ret;
                break;
        case V4L2_CID_AUTOGAIN:
                ret = ov5648_gain_value(sensor, &ctrls->gain->val);
                if (ret)
                        return ret;
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int ov5648_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct v4l2_subdev *subdev = ov5648_ctrl_subdev(ctrl);
        struct ov5648_sensor *sensor = ov5648_subdev_sensor(subdev);
        struct ov5648_ctrls *ctrls = &sensor->ctrls;
        unsigned int index;
        bool enable;
        int ret;

        /* Wait for the sensor to be on before setting controls. */
        if (pm_runtime_suspended(sensor->dev))
                return 0;

        switch (ctrl->id) {
        case V4L2_CID_EXPOSURE_AUTO:
                enable = ctrl->val == V4L2_EXPOSURE_AUTO;

                ret = ov5648_exposure_auto_configure(sensor, enable);
                if (ret)
                        return ret;

                if (!enable && ctrls->exposure->is_new) {
                        ret = ov5648_exposure_configure(sensor,
                                                        ctrls->exposure->val);
                        if (ret)
                                return ret;
                }
                break;
        case V4L2_CID_AUTOGAIN:
                enable = !!ctrl->val;

                ret = ov5648_gain_auto_configure(sensor, enable);
                if (ret)
                        return ret;

                if (!enable) {
                        ret = ov5648_gain_configure(sensor, ctrls->gain->val);
                        if (ret)
                                return ret;

                }
                break;
        case V4L2_CID_AUTO_WHITE_BALANCE:
                enable = !!ctrl->val;

                ret = ov5648_white_balance_auto_configure(sensor, enable);
                if (ret)
                        return ret;

                if (!enable) {
                        ret = ov5648_white_balance_configure(sensor,
                                                             ctrls->red_balance->val,
                                                             ctrls->blue_balance->val);
                        if (ret)
                                return ret;
                }
                break;
        case V4L2_CID_HFLIP:
                enable = !!ctrl->val;
                return ov5648_flip_horz_configure(sensor, enable);
        case V4L2_CID_VFLIP:
                enable = !!ctrl->val;
                return ov5648_flip_vert_configure(sensor, enable);
        case V4L2_CID_TEST_PATTERN:
                index = (unsigned int)ctrl->val;
                return ov5648_test_pattern_configure(sensor, index);
        default:
                return -EINVAL;
        }

        return 0;
}

static const struct v4l2_ctrl_ops ov5648_ctrl_ops = {
        .g_volatile_ctrl        = ov5648_g_volatile_ctrl,
        .s_ctrl                 = ov5648_s_ctrl,
};

static int ov5648_ctrls_init(struct ov5648_sensor *sensor)
{
        struct ov5648_ctrls *ctrls = &sensor->ctrls;
        struct v4l2_ctrl_handler *handler = &ctrls->handler;
        const struct v4l2_ctrl_ops *ops = &ov5648_ctrl_ops;
        int ret;

        v4l2_ctrl_handler_init(handler, 32);

        /* Use our mutex for ctrl locking. */
        handler->lock = &sensor->mutex;

        /* Exposure */

        ctrls->exposure_auto = v4l2_ctrl_new_std_menu(handler, ops,
                                                      V4L2_CID_EXPOSURE_AUTO,
                                                      V4L2_EXPOSURE_MANUAL, 0,
                                                      V4L2_EXPOSURE_AUTO);

        ctrls->exposure = v4l2_ctrl_new_std(handler, ops, V4L2_CID_EXPOSURE,
                                            16, 1048575, 16, 512);

        v4l2_ctrl_auto_cluster(2, &ctrls->exposure_auto, 1, true);

        /* Gain */

        ctrls->gain_auto =
                v4l2_ctrl_new_std(handler, ops, V4L2_CID_AUTOGAIN, 0, 1, 1, 1);

        ctrls->gain = v4l2_ctrl_new_std(handler, ops, V4L2_CID_GAIN, 16, 1023,
                                        16, 16);

        v4l2_ctrl_auto_cluster(2, &ctrls->gain_auto, 0, true);

        /* White Balance */

        ctrls->white_balance_auto =
                v4l2_ctrl_new_std(handler, ops, V4L2_CID_AUTO_WHITE_BALANCE, 0,
                                  1, 1, 1);

        ctrls->red_balance = v4l2_ctrl_new_std(handler, ops,
                                               V4L2_CID_RED_BALANCE, 0, 4095,
                                               1, 1024);

        ctrls->blue_balance = v4l2_ctrl_new_std(handler, ops,
                                                V4L2_CID_BLUE_BALANCE, 0, 4095,
                                                1, 1024);

        v4l2_ctrl_auto_cluster(3, &ctrls->white_balance_auto, 0, false);

        /* Flip */

        v4l2_ctrl_new_std(handler, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
        v4l2_ctrl_new_std(handler, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);

        /* Test Pattern */

        v4l2_ctrl_new_std_menu_items(handler, ops, V4L2_CID_TEST_PATTERN,
                                     ARRAY_SIZE(ov5648_test_pattern_menu) - 1,
                                     0, 0, ov5648_test_pattern_menu);

        /* MIPI CSI-2 */

        ctrls->link_freq =
                v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ,
                                       ARRAY_SIZE(ov5648_link_freq_menu) - 1,
                                       0, ov5648_link_freq_menu);

        ctrls->pixel_rate =
                v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, 1,
                                  INT_MAX, 1, 1);

        if (handler->error) {
                ret = handler->error;
                goto error_ctrls;
        }

        ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
        ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;

        ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
        ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;

        sensor->subdev.ctrl_handler = handler;

        return 0;

error_ctrls:
        v4l2_ctrl_handler_free(handler);

        return ret;
}

/* Subdev Video Operations */

static int ov5648_s_stream(struct v4l2_subdev *subdev, int enable)
{
        struct ov5648_sensor *sensor = ov5648_subdev_sensor(subdev);
        struct ov5648_state *state = &sensor->state;
        int ret;

        if (enable) {
                ret = pm_runtime_resume_and_get(sensor->dev);
                if (ret < 0)
                        return ret;
        }

        mutex_lock(&sensor->mutex);
        ret = ov5648_sw_standby(sensor, !enable);
        mutex_unlock(&sensor->mutex);

        if (ret)
                return ret;

        state->streaming = !!enable;

        if (!enable)
                pm_runtime_put(sensor->dev);

        return 0;
}

static int ov5648_g_frame_interval(struct v4l2_subdev *subdev,
                                   struct v4l2_subdev_frame_interval *interval)
{
        struct ov5648_sensor *sensor = ov5648_subdev_sensor(subdev);
        const struct ov5648_mode *mode;
        int ret = 0;

        mutex_lock(&sensor->mutex);

        mode = sensor->state.mode;

        switch (sensor->state.mbus_code) {
        case MEDIA_BUS_FMT_SBGGR8_1X8:
                interval->interval = mode->frame_interval[0];
                break;
        case MEDIA_BUS_FMT_SBGGR10_1X10:
                interval->interval = mode->frame_interval[1];
                break;
        default:
                ret = -EINVAL;
        }

        mutex_unlock(&sensor->mutex);

        return ret;
}

static const struct v4l2_subdev_video_ops ov5648_subdev_video_ops = {
        .s_stream               = ov5648_s_stream,
        .g_frame_interval       = ov5648_g_frame_interval,
        .s_frame_interval       = ov5648_g_frame_interval,
};

/* Subdev Pad Operations */

static int ov5648_enum_mbus_code(struct v4l2_subdev *subdev,
                                 struct v4l2_subdev_state *sd_state,
                                 struct v4l2_subdev_mbus_code_enum *code_enum)
{
        if (code_enum->index >= ARRAY_SIZE(ov5648_mbus_codes))
                return -EINVAL;

        code_enum->code = ov5648_mbus_codes[code_enum->index];

        return 0;
}

static void ov5648_mbus_format_fill(struct v4l2_mbus_framefmt *mbus_format,
                                    u32 mbus_code,
                                    const struct ov5648_mode *mode)
{
        mbus_format->width = mode->output_size_x;
        mbus_format->height = mode->output_size_y;
        mbus_format->code = mbus_code;

        mbus_format->field = V4L2_FIELD_NONE;
        mbus_format->colorspace = V4L2_COLORSPACE_RAW;
        mbus_format->ycbcr_enc =
                V4L2_MAP_YCBCR_ENC_DEFAULT(mbus_format->colorspace);
        mbus_format->quantization = V4L2_QUANTIZATION_FULL_RANGE;
        mbus_format->xfer_func =
                V4L2_MAP_XFER_FUNC_DEFAULT(mbus_format->colorspace);
}

static int ov5648_get_fmt(struct v4l2_subdev *subdev,
                          struct v4l2_subdev_state *sd_state,
                          struct v4l2_subdev_format *format)
{
        struct ov5648_sensor *sensor = ov5648_subdev_sensor(subdev);
        struct v4l2_mbus_framefmt *mbus_format = &format->format;

        mutex_lock(&sensor->mutex);

        if (format->which == V4L2_SUBDEV_FORMAT_TRY)
                *mbus_format = *v4l2_subdev_get_try_format(subdev, sd_state,
                                                           format->pad);
        else
                ov5648_mbus_format_fill(mbus_format, sensor->state.mbus_code,
                                        sensor->state.mode);

        mutex_unlock(&sensor->mutex);

        return 0;
}

static int ov5648_set_fmt(struct v4l2_subdev *subdev,
                          struct v4l2_subdev_state *sd_state,
                          struct v4l2_subdev_format *format)
{
        struct ov5648_sensor *sensor = ov5648_subdev_sensor(subdev);
        struct v4l2_mbus_framefmt *mbus_format = &format->format;
        const struct ov5648_mode *mode;
        u32 mbus_code = 0;
        unsigned int index;
        int ret = 0;

        mutex_lock(&sensor->mutex);

        if (sensor->state.streaming) {
                ret = -EBUSY;
                goto complete;
        }

        /* Try to find requested mbus code. */
        for (index = 0; index < ARRAY_SIZE(ov5648_mbus_codes); index++) {
                if (ov5648_mbus_codes[index] == mbus_format->code) {
                        mbus_code = mbus_format->code;
                        break;
                }
        }

        /* Fallback to default. */
        if (!mbus_code)
                mbus_code = ov5648_mbus_codes[0];

        /* Find the mode with nearest dimensions. */
        mode = v4l2_find_nearest_size(ov5648_modes, ARRAY_SIZE(ov5648_modes),
                                      output_size_x, output_size_y,
                                      mbus_format->width, mbus_format->height);
        if (!mode) {
                ret = -EINVAL;
                goto complete;
        }

        ov5648_mbus_format_fill(mbus_format, mbus_code, mode);

        if (format->which == V4L2_SUBDEV_FORMAT_TRY)
                *v4l2_subdev_get_try_format(subdev, sd_state, format->pad) =
                        *mbus_format;
        else if (sensor->state.mode != mode ||
                 sensor->state.mbus_code != mbus_code)
                ret = ov5648_state_configure(sensor, mode, mbus_code);

complete:
        mutex_unlock(&sensor->mutex);

        return ret;
}

static int ov5648_enum_frame_size(struct v4l2_subdev *subdev,
                                  struct v4l2_subdev_state *sd_state,
                                  struct v4l2_subdev_frame_size_enum *size_enum)
{
        const struct ov5648_mode *mode;

        if (size_enum->index >= ARRAY_SIZE(ov5648_modes))
                return -EINVAL;

        mode = &ov5648_modes[size_enum->index];

        size_enum->min_width = size_enum->max_width = mode->output_size_x;
        size_enum->min_height = size_enum->max_height = mode->output_size_y;

        return 0;
}

static int ov5648_enum_frame_interval(struct v4l2_subdev *subdev,
                                      struct v4l2_subdev_state *sd_state,
                                      struct v4l2_subdev_frame_interval_enum *interval_enum)
{
        const struct ov5648_mode *mode = NULL;
        unsigned int mode_index;
        unsigned int interval_index;

        if (interval_enum->index > 0)
                return -EINVAL;

        /*
         * Multiple modes with the same dimensions may have different frame
         * intervals, so look up each relevant mode.
         */
        for (mode_index = 0, interval_index = 0;
             mode_index < ARRAY_SIZE(ov5648_modes); mode_index++) {
                mode = &ov5648_modes[mode_index];

                if (mode->output_size_x == interval_enum->width &&
                    mode->output_size_y == interval_enum->height) {
                        if (interval_index == interval_enum->index)
                                break;

                        interval_index++;
                }
        }

        if (mode_index == ARRAY_SIZE(ov5648_modes))
                return -EINVAL;

        switch (interval_enum->code) {
        case MEDIA_BUS_FMT_SBGGR8_1X8:
                interval_enum->interval = mode->frame_interval[0];
                break;
        case MEDIA_BUS_FMT_SBGGR10_1X10:
                interval_enum->interval = mode->frame_interval[1];
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static const struct v4l2_subdev_pad_ops ov5648_subdev_pad_ops = {
        .enum_mbus_code         = ov5648_enum_mbus_code,
        .get_fmt                = ov5648_get_fmt,
        .set_fmt                = ov5648_set_fmt,
        .enum_frame_size        = ov5648_enum_frame_size,
        .enum_frame_interval    = ov5648_enum_frame_interval,
};

static const struct v4l2_subdev_ops ov5648_subdev_ops = {
        .video          = &ov5648_subdev_video_ops,
        .pad            = &ov5648_subdev_pad_ops,
};

static int ov5648_suspend(struct device *dev)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct v4l2_subdev *subdev = i2c_get_clientdata(client);
        struct ov5648_sensor *sensor = ov5648_subdev_sensor(subdev);
        struct ov5648_state *state = &sensor->state;
        int ret = 0;

        mutex_lock(&sensor->mutex);

        if (state->streaming) {
                ret = ov5648_sw_standby(sensor, true);
                if (ret)
                        goto complete;
        }

        ret = ov5648_sensor_power(sensor, false);
        if (ret)
                ov5648_sw_standby(sensor, false);

complete:
        mutex_unlock(&sensor->mutex);

        return ret;
}

static int ov5648_resume(struct device *dev)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct v4l2_subdev *subdev = i2c_get_clientdata(client);
        struct ov5648_sensor *sensor = ov5648_subdev_sensor(subdev);
        struct ov5648_state *state = &sensor->state;
        int ret = 0;

        mutex_lock(&sensor->mutex);

        ret = ov5648_sensor_power(sensor, true);
        if (ret)
                goto complete;

        ret = ov5648_sensor_init(sensor);
        if (ret)
                goto error_power;

        ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
        if (ret)
                goto error_power;

        if (state->streaming) {
                ret = ov5648_sw_standby(sensor, false);
                if (ret)
                        goto error_power;
        }

        goto complete;

error_power:
        ov5648_sensor_power(sensor, false);

complete:
        mutex_unlock(&sensor->mutex);

        return ret;
}

static int ov5648_probe(struct i2c_client *client)
{
        struct device *dev = &client->dev;
        struct fwnode_handle *handle;
        struct ov5648_sensor *sensor;
        struct v4l2_subdev *subdev;
        struct media_pad *pad;
        unsigned long rate;
        int ret;

        sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
        if (!sensor)
                return -ENOMEM;

        sensor->dev = dev;
        sensor->i2c_client = client;

        /* Graph Endpoint */

        handle = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
        if (!handle) {
                dev_err(dev, "unable to find endpoint node\n");
                return -EINVAL;
        }

        sensor->endpoint.bus_type = V4L2_MBUS_CSI2_DPHY;

        ret = v4l2_fwnode_endpoint_alloc_parse(handle, &sensor->endpoint);
        fwnode_handle_put(handle);
        if (ret) {
                dev_err(dev, "failed to parse endpoint node\n");
                return ret;
        }

        /* GPIOs */

        sensor->powerdown = devm_gpiod_get_optional(dev, "powerdown",
                                                    GPIOD_OUT_HIGH);
        if (IS_ERR(sensor->powerdown)) {
                ret = PTR_ERR(sensor->powerdown);
                goto error_endpoint;
        }

        sensor->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
        if (IS_ERR(sensor->reset)) {
                ret = PTR_ERR(sensor->reset);
                goto error_endpoint;
        }

        /* Regulators */

        /* DVDD: digital core */
        sensor->dvdd = devm_regulator_get(dev, "dvdd");
        if (IS_ERR(sensor->dvdd)) {
                dev_err(dev, "cannot get DVDD (digital core) regulator\n");
                ret = PTR_ERR(sensor->dvdd);
                goto error_endpoint;
        }

        /* DOVDD: digital I/O */
        sensor->dovdd = devm_regulator_get(dev, "dovdd");
        if (IS_ERR(sensor->dvdd)) {
                dev_err(dev, "cannot get DOVDD (digital I/O) regulator\n");
                ret = PTR_ERR(sensor->dvdd);
                goto error_endpoint;
        }

        /* AVDD: analog */
        sensor->avdd = devm_regulator_get_optional(dev, "avdd");
        if (IS_ERR(sensor->avdd)) {
                dev_info(dev, "no AVDD regulator provided, using internal\n");
                sensor->avdd = NULL;
        }

        /* External Clock */

        sensor->xvclk = devm_clk_get(dev, NULL);
        if (IS_ERR(sensor->xvclk)) {
                dev_err(dev, "failed to get external clock\n");
                ret = PTR_ERR(sensor->xvclk);
                goto error_endpoint;
        }

        rate = clk_get_rate(sensor->xvclk);
        if (rate != OV5648_XVCLK_RATE) {
                dev_err(dev, "clock rate %lu Hz is unsupported\n", rate);
                ret = -EINVAL;
                goto error_endpoint;
        }

        /* Subdev, entity and pad */

        subdev = &sensor->subdev;
        v4l2_i2c_subdev_init(subdev, client, &ov5648_subdev_ops);

        subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
        subdev->entity.function = MEDIA_ENT_F_CAM_SENSOR;

        pad = &sensor->pad;
        pad->flags = MEDIA_PAD_FL_SOURCE;

        ret = media_entity_pads_init(&subdev->entity, 1, pad);
        if (ret)
                goto error_entity;

        /* Mutex */

        mutex_init(&sensor->mutex);

        /* Sensor */

        ret = ov5648_ctrls_init(sensor);
        if (ret)
                goto error_mutex;

        ret = ov5648_state_init(sensor);
        if (ret)
                goto error_ctrls;

        /* Runtime PM */

        pm_runtime_enable(sensor->dev);
        pm_runtime_set_suspended(sensor->dev);

        /* V4L2 subdev register */

        ret = v4l2_async_register_subdev_sensor(subdev);
        if (ret)
                goto error_pm;

        return 0;

error_pm:
        pm_runtime_disable(sensor->dev);

error_ctrls:
        v4l2_ctrl_handler_free(&sensor->ctrls.handler);

error_mutex:
        mutex_destroy(&sensor->mutex);

error_entity:
        media_entity_cleanup(&sensor->subdev.entity);

error_endpoint:
        v4l2_fwnode_endpoint_free(&sensor->endpoint);

        return ret;
}

static int ov5648_remove(struct i2c_client *client)
{
        struct v4l2_subdev *subdev = i2c_get_clientdata(client);
        struct ov5648_sensor *sensor = ov5648_subdev_sensor(subdev);

        v4l2_async_unregister_subdev(subdev);
        pm_runtime_disable(sensor->dev);
        v4l2_ctrl_handler_free(&sensor->ctrls.handler);
        mutex_destroy(&sensor->mutex);
        media_entity_cleanup(&subdev->entity);

        return 0;
}

static const struct dev_pm_ops ov5648_pm_ops = {
        SET_RUNTIME_PM_OPS(ov5648_suspend, ov5648_resume, NULL)
};

static const struct of_device_id ov5648_of_match[] = {
        { .compatible = "ovti,ov5648" },
        { }
};
MODULE_DEVICE_TABLE(of, ov5648_of_match);

static struct i2c_driver ov5648_driver = {
        .driver = {
                .name = "ov5648",
                .of_match_table = ov5648_of_match,
                .pm = &ov5648_pm_ops,
        },
        .probe_new = ov5648_probe,
        .remove  = ov5648_remove,
};

module_i2c_driver(ov5648_driver);

MODULE_AUTHOR("Paul Kocialkowski <paul.kocialkowski@bootlin.com>");
MODULE_DESCRIPTION("V4L2 driver for the OmniVision OV5648 image sensor");
MODULE_LICENSE("GPL v2");