LXR linux/include/linux/mfd/lp3943.h

   1/*
   2 * TI/National Semiconductor LP3943 Device
   3 *
   4 * Copyright 2013 Texas Instruments
   5 *
   6 * Author: Milo Kim <milo.kim@ti.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 *
  12 */
  13
  14#ifndef __MFD_LP3943_H__
  15#define __MFD_LP3943_H__
  16
  17#include <linux/gpio.h>
  18#include <linux/pwm.h>
  19#include <linux/regmap.h>
  20
  21/* Registers */
  22#define LP3943_REG_GPIO_A               0x00
  23#define LP3943_REG_GPIO_B               0x01
  24#define LP3943_REG_PRESCALE0            0x02
  25#define LP3943_REG_PWM0                 0x03
  26#define LP3943_REG_PRESCALE1            0x04
  27#define LP3943_REG_PWM1                 0x05
  28#define LP3943_REG_MUX0                 0x06
  29#define LP3943_REG_MUX1                 0x07
  30#define LP3943_REG_MUX2                 0x08
  31#define LP3943_REG_MUX3                 0x09
  32
  33/* Bit description for LP3943_REG_MUX0 ~ 3 */
  34#define LP3943_GPIO_IN                  0x00
  35#define LP3943_GPIO_OUT_HIGH            0x00
  36#define LP3943_GPIO_OUT_LOW             0x01
  37#define LP3943_DIM_PWM0                 0x02
  38#define LP3943_DIM_PWM1                 0x03
  39
  40#define LP3943_NUM_PWMS                 2
  41
  42enum lp3943_pwm_output {
  43        LP3943_PWM_OUT0,
  44        LP3943_PWM_OUT1,
  45        LP3943_PWM_OUT2,
  46        LP3943_PWM_OUT3,
  47        LP3943_PWM_OUT4,
  48        LP3943_PWM_OUT5,
  49        LP3943_PWM_OUT6,
  50        LP3943_PWM_OUT7,
  51        LP3943_PWM_OUT8,
  52        LP3943_PWM_OUT9,
  53        LP3943_PWM_OUT10,
  54        LP3943_PWM_OUT11,
  55        LP3943_PWM_OUT12,
  56        LP3943_PWM_OUT13,
  57        LP3943_PWM_OUT14,
  58        LP3943_PWM_OUT15,
  59};
  60
  61/*
  62 * struct lp3943_pwm_map
  63 * @output: Output pins which are mapped to each PWM channel
  64 * @num_outputs: Number of outputs
  65 */
  66struct lp3943_pwm_map {
  67        enum lp3943_pwm_output *output;
  68        int num_outputs;
  69};
  70
  71/*
  72 * struct lp3943_platform_data
  73 * @pwms: Output channel definitions for PWM channel 0 and 1
  74 */
  75struct lp3943_platform_data {
  76        struct lp3943_pwm_map *pwms[LP3943_NUM_PWMS];
  77};
  78
  79/*
  80 * struct lp3943_reg_cfg
  81 * @reg: Register address
  82 * @mask: Register bit mask to be updated
  83 * @shift: Register bit shift
  84 */
  85struct lp3943_reg_cfg {
  86        u8 reg;
  87        u8 mask;
  88        u8 shift;
  89};
  90
  91/*
  92 * struct lp3943
  93 * @dev: Parent device pointer
  94 * @regmap: Used for I2C communication on accessing registers
  95 * @pdata: LP3943 platform specific data
  96 * @mux_cfg: Register configuration for pin MUX
  97 * @pin_used: Bit mask for output pin used.
  98 *            This bitmask is used for pin assignment management.
  99 *            1 = pin used, 0 = available.
 100 *            Only LSB 16 bits are used, but it is unsigned long type
 101 *            for atomic bitwise operations.
 102 */
 103struct lp3943 {
 104        struct device *dev;
 105        struct regmap *regmap;
 106        struct lp3943_platform_data *pdata;
 107        const struct lp3943_reg_cfg *mux_cfg;
 108        unsigned long pin_used;
 109};
 110
 111int lp3943_read_byte(struct lp3943 *lp3943, u8 reg, u8 *read);
 112int lp3943_write_byte(struct lp3943 *lp3943, u8 reg, u8 data);
 113int lp3943_update_bits(struct lp3943 *lp3943, u8 reg, u8 mask, u8 data);
 114#endif
 115