linux/drivers/clk/sunxi-ng/ccu-sun50i-h6-r.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2017 Icenowy Zheng <icenowy@aosc.xyz>
   4 */
   5
   6#include <linux/clk-provider.h>
   7#include <linux/of_address.h>
   8#include <linux/platform_device.h>
   9
  10#include "ccu_common.h"
  11#include "ccu_reset.h"
  12
  13#include "ccu_div.h"
  14#include "ccu_gate.h"
  15#include "ccu_mp.h"
  16#include "ccu_nm.h"
  17
  18#include "ccu-sun50i-h6-r.h"
  19
  20/*
  21 * Information about AR100 and AHB/APB clocks in R_CCU are gathered from
  22 * clock definitions in the BSP source code.
  23 */
  24
  25static const char * const ar100_r_apb2_parents[] = { "osc24M", "osc32k",
  26                                                     "iosc", "pll-periph0" };
  27static const struct ccu_mux_var_prediv ar100_r_apb2_predivs[] = {
  28        { .index = 3, .shift = 0, .width = 5 },
  29};
  30
  31static struct ccu_div ar100_clk = {
  32        .div            = _SUNXI_CCU_DIV_FLAGS(8, 2, CLK_DIVIDER_POWER_OF_TWO),
  33
  34        .mux            = {
  35                .shift  = 24,
  36                .width  = 2,
  37
  38                .var_predivs    = ar100_r_apb2_predivs,
  39                .n_var_predivs  = ARRAY_SIZE(ar100_r_apb2_predivs),
  40        },
  41
  42        .common         = {
  43                .reg            = 0x000,
  44                .features       = CCU_FEATURE_VARIABLE_PREDIV,
  45                .hw.init        = CLK_HW_INIT_PARENTS("ar100",
  46                                                      ar100_r_apb2_parents,
  47                                                      &ccu_div_ops,
  48                                                      0),
  49        },
  50};
  51
  52static CLK_FIXED_FACTOR_HW(r_ahb_clk, "r-ahb", &ar100_clk.common.hw, 1, 1, 0);
  53
  54static SUNXI_CCU_M(r_apb1_clk, "r-apb1", "r-ahb", 0x00c, 0, 2, 0);
  55
  56static struct ccu_div r_apb2_clk = {
  57        .div            = _SUNXI_CCU_DIV_FLAGS(8, 2, CLK_DIVIDER_POWER_OF_TWO),
  58
  59        .mux            = {
  60                .shift  = 24,
  61                .width  = 2,
  62
  63                .var_predivs    = ar100_r_apb2_predivs,
  64                .n_var_predivs  = ARRAY_SIZE(ar100_r_apb2_predivs),
  65        },
  66
  67        .common         = {
  68                .reg            = 0x010,
  69                .features       = CCU_FEATURE_VARIABLE_PREDIV,
  70                .hw.init        = CLK_HW_INIT_PARENTS("r-apb2",
  71                                                      ar100_r_apb2_parents,
  72                                                      &ccu_div_ops,
  73                                                      0),
  74        },
  75};
  76
  77/*
  78 * Information about the gate/resets are gathered from the clock header file
  79 * in the BSP source code, although most of them are unused. The existence
  80 * of the hardware block is verified with "3.1 Memory Mapping" chapter in
  81 * "Allwinner H6 V200 User Manual V1.1"; and the parent APB buses are verified
  82 * with "3.3.2.1 System Bus Tree" chapter inthe same document.
  83 */
  84static SUNXI_CCU_GATE(r_apb1_timer_clk, "r-apb1-timer", "r-apb1",
  85                      0x11c, BIT(0), 0);
  86static SUNXI_CCU_GATE(r_apb1_twd_clk,   "r-apb1-twd",   "r-apb1",
  87                      0x12c, BIT(0), 0);
  88static SUNXI_CCU_GATE(r_apb1_pwm_clk,   "r-apb1-pwm",   "r-apb1",
  89                      0x13c, BIT(0), 0);
  90static SUNXI_CCU_GATE(r_apb2_uart_clk,  "r-apb2-uart",  "r-apb2",
  91                      0x18c, BIT(0), 0);
  92static SUNXI_CCU_GATE(r_apb2_i2c_clk,   "r-apb2-i2c",   "r-apb2",
  93                      0x19c, BIT(0), 0);
  94static SUNXI_CCU_GATE(r_apb2_rsb_clk,   "r-apb2-rsb",   "r-apb2",
  95                      0x1bc, BIT(0), 0);
  96static SUNXI_CCU_GATE(r_apb1_ir_clk,    "r-apb1-ir",    "r-apb1",
  97                      0x1cc, BIT(0), 0);
  98static SUNXI_CCU_GATE(r_apb1_w1_clk,    "r-apb1-w1",    "r-apb1",
  99                      0x1ec, BIT(0), 0);
 100
 101/* Information of IR(RX) mod clock is gathered from BSP source code */
 102static const char * const r_mod0_default_parents[] = { "osc32k", "osc24M" };
 103static SUNXI_CCU_MP_WITH_MUX_GATE(ir_clk, "ir",
 104                                  r_mod0_default_parents, 0x1c0,
 105                                  0, 5,         /* M */
 106                                  8, 2,         /* P */
 107                                  24, 1,        /* mux */
 108                                  BIT(31),      /* gate */
 109                                  0);
 110
 111/*
 112 * BSP didn't use the 1-wire function at all now, and the information about
 113 * this mod clock is guessed from the IR mod clock above. The existence of
 114 * this mod clock is proven by BSP clock header, and the dividers are verified
 115 * by contents in the 1-wire related chapter of the User Manual.
 116 */
 117
 118static SUNXI_CCU_MP_WITH_MUX_GATE(w1_clk, "w1",
 119                                  r_mod0_default_parents, 0x1e0,
 120                                  0, 5,         /* M */
 121                                  8, 2,         /* P */
 122                                  24, 1,        /* mux */
 123                                  BIT(31),      /* gate */
 124                                  0);
 125
 126static struct ccu_common *sun50i_h6_r_ccu_clks[] = {
 127        &ar100_clk.common,
 128        &r_apb1_clk.common,
 129        &r_apb2_clk.common,
 130        &r_apb1_timer_clk.common,
 131        &r_apb1_twd_clk.common,
 132        &r_apb1_pwm_clk.common,
 133        &r_apb2_uart_clk.common,
 134        &r_apb2_i2c_clk.common,
 135        &r_apb2_rsb_clk.common,
 136        &r_apb1_ir_clk.common,
 137        &r_apb1_w1_clk.common,
 138        &ir_clk.common,
 139        &w1_clk.common,
 140};
 141
 142static struct ccu_common *sun50i_h616_r_ccu_clks[] = {
 143        &r_apb1_clk.common,
 144        &r_apb2_clk.common,
 145        &r_apb1_twd_clk.common,
 146        &r_apb2_i2c_clk.common,
 147        &r_apb2_rsb_clk.common,
 148        &r_apb1_ir_clk.common,
 149        &ir_clk.common,
 150};
 151
 152static struct clk_hw_onecell_data sun50i_h6_r_hw_clks = {
 153        .hws    = {
 154                [CLK_AR100]             = &ar100_clk.common.hw,
 155                [CLK_R_AHB]             = &r_ahb_clk.hw,
 156                [CLK_R_APB1]            = &r_apb1_clk.common.hw,
 157                [CLK_R_APB2]            = &r_apb2_clk.common.hw,
 158                [CLK_R_APB1_TIMER]      = &r_apb1_timer_clk.common.hw,
 159                [CLK_R_APB1_TWD]        = &r_apb1_twd_clk.common.hw,
 160                [CLK_R_APB1_PWM]        = &r_apb1_pwm_clk.common.hw,
 161                [CLK_R_APB2_UART]       = &r_apb2_uart_clk.common.hw,
 162                [CLK_R_APB2_I2C]        = &r_apb2_i2c_clk.common.hw,
 163                [CLK_R_APB2_RSB]        = &r_apb2_rsb_clk.common.hw,
 164                [CLK_R_APB1_IR]         = &r_apb1_ir_clk.common.hw,
 165                [CLK_R_APB1_W1]         = &r_apb1_w1_clk.common.hw,
 166                [CLK_IR]                = &ir_clk.common.hw,
 167                [CLK_W1]                = &w1_clk.common.hw,
 168        },
 169        .num    = CLK_NUMBER,
 170};
 171
 172static struct clk_hw_onecell_data sun50i_h616_r_hw_clks = {
 173        .hws    = {
 174                [CLK_R_AHB]             = &r_ahb_clk.hw,
 175                [CLK_R_APB1]            = &r_apb1_clk.common.hw,
 176                [CLK_R_APB2]            = &r_apb2_clk.common.hw,
 177                [CLK_R_APB1_TWD]        = &r_apb1_twd_clk.common.hw,
 178                [CLK_R_APB2_I2C]        = &r_apb2_i2c_clk.common.hw,
 179                [CLK_R_APB2_RSB]        = &r_apb2_rsb_clk.common.hw,
 180                [CLK_R_APB1_IR]         = &r_apb1_ir_clk.common.hw,
 181                [CLK_IR]                = &ir_clk.common.hw,
 182        },
 183        .num    = CLK_NUMBER,
 184};
 185
 186static struct ccu_reset_map sun50i_h6_r_ccu_resets[] = {
 187        [RST_R_APB1_TIMER]      =  { 0x11c, BIT(16) },
 188        [RST_R_APB1_TWD]        =  { 0x12c, BIT(16) },
 189        [RST_R_APB1_PWM]        =  { 0x13c, BIT(16) },
 190        [RST_R_APB2_UART]       =  { 0x18c, BIT(16) },
 191        [RST_R_APB2_I2C]        =  { 0x19c, BIT(16) },
 192        [RST_R_APB2_RSB]        =  { 0x1bc, BIT(16) },
 193        [RST_R_APB1_IR]         =  { 0x1cc, BIT(16) },
 194        [RST_R_APB1_W1]         =  { 0x1ec, BIT(16) },
 195};
 196
 197static struct ccu_reset_map sun50i_h616_r_ccu_resets[] = {
 198        [RST_R_APB1_TWD]        =  { 0x12c, BIT(16) },
 199        [RST_R_APB2_I2C]        =  { 0x19c, BIT(16) },
 200        [RST_R_APB2_RSB]        =  { 0x1bc, BIT(16) },
 201        [RST_R_APB1_IR]         =  { 0x1cc, BIT(16) },
 202};
 203
 204static const struct sunxi_ccu_desc sun50i_h6_r_ccu_desc = {
 205        .ccu_clks       = sun50i_h6_r_ccu_clks,
 206        .num_ccu_clks   = ARRAY_SIZE(sun50i_h6_r_ccu_clks),
 207
 208        .hw_clks        = &sun50i_h6_r_hw_clks,
 209
 210        .resets         = sun50i_h6_r_ccu_resets,
 211        .num_resets     = ARRAY_SIZE(sun50i_h6_r_ccu_resets),
 212};
 213
 214static const struct sunxi_ccu_desc sun50i_h616_r_ccu_desc = {
 215        .ccu_clks       = sun50i_h616_r_ccu_clks,
 216        .num_ccu_clks   = ARRAY_SIZE(sun50i_h616_r_ccu_clks),
 217
 218        .hw_clks        = &sun50i_h616_r_hw_clks,
 219
 220        .resets         = sun50i_h616_r_ccu_resets,
 221        .num_resets     = ARRAY_SIZE(sun50i_h616_r_ccu_resets),
 222};
 223
 224static void __init sunxi_r_ccu_init(struct device_node *node,
 225                                    const struct sunxi_ccu_desc *desc)
 226{
 227        void __iomem *reg;
 228
 229        reg = of_io_request_and_map(node, 0, of_node_full_name(node));
 230        if (IS_ERR(reg)) {
 231                pr_err("%pOF: Could not map the clock registers\n", node);
 232                return;
 233        }
 234
 235        sunxi_ccu_probe(node, reg, desc);
 236}
 237
 238static void __init sun50i_h6_r_ccu_setup(struct device_node *node)
 239{
 240        sunxi_r_ccu_init(node, &sun50i_h6_r_ccu_desc);
 241}
 242CLK_OF_DECLARE(sun50i_h6_r_ccu, "allwinner,sun50i-h6-r-ccu",
 243               sun50i_h6_r_ccu_setup);
 244
 245static void __init sun50i_h616_r_ccu_setup(struct device_node *node)
 246{
 247        sunxi_r_ccu_init(node, &sun50i_h616_r_ccu_desc);
 248}
 249CLK_OF_DECLARE(sun50i_h616_r_ccu, "allwinner,sun50i-h616-r-ccu",
 250               sun50i_h616_r_ccu_setup);
 251