drivers/clk/sunxi-ng/ccu-sun50i-h6-r.c

   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/module.h>
   8 #include <linux/of.h>
   9 #include <linux/platform_device.h>
  10
  11 #include "ccu_common.h"
  12 #include "ccu_reset.h"
  13
  14 #include "ccu_div.h"
  15 #include "ccu_gate.h"
  16 #include "ccu_mp.h"
  17 #include "ccu_nm.h"
  18
  19 #include "ccu-sun50i-h6-r.h"
  20
  21 /*
  22  * Information about AR100 and AHB/APB clocks in R_CCU are gathered from
  23  * clock definitions in the BSP source code.
  24  */
  25
  26 static const char * const ar100_r_apb2_parents[] = { "osc24M", "osc32k",
  27                                                      "iosc", "pll-periph0" };
  28 static const struct ccu_mux_var_prediv ar100_r_apb2_predivs[] = {
  29         { .index = 3, .shift = 0, .width = 5 },
  30 };
  31
  32 static struct ccu_div ar100_clk = {
  33         .div            = _SUNXI_CCU_DIV_FLAGS(8, 2, CLK_DIVIDER_POWER_OF_TWO),
  34
  35         .mux            = {
  36                 .shift  = 24,
  37                 .width  = 2,
  38
  39                 .var_predivs    = ar100_r_apb2_predivs,
  40                 .n_var_predivs  = ARRAY_SIZE(ar100_r_apb2_predivs),
  41         },
  42
  43         .common         = {
  44                 .reg            = 0x000,
  45                 .features       = CCU_FEATURE_VARIABLE_PREDIV,
  46                 .hw.init        = CLK_HW_INIT_PARENTS("ar100",
  47                                                       ar100_r_apb2_parents,
  48                                                       &ccu_div_ops,
  49                                                       0),
  50         },
  51 };
  52
  53 static CLK_FIXED_FACTOR_HW(r_ahb_clk, "r-ahb", &ar100_clk.common.hw, 1, 1, 0);
  54
  55 static SUNXI_CCU_M(r_apb1_clk, "r-apb1", "r-ahb", 0x00c, 0, 2, 0);
  56
  57 static struct ccu_div r_apb2_clk = {
  58         .div            = _SUNXI_CCU_DIV_FLAGS(8, 2, CLK_DIVIDER_POWER_OF_TWO),
  59
  60         .mux            = {
  61                 .shift  = 24,
  62                 .width  = 2,
  63
  64                 .var_predivs    = ar100_r_apb2_predivs,
  65                 .n_var_predivs  = ARRAY_SIZE(ar100_r_apb2_predivs),
  66         },
  67
  68         .common         = {
  69                 .reg            = 0x010,
  70                 .features       = CCU_FEATURE_VARIABLE_PREDIV,
  71                 .hw.init        = CLK_HW_INIT_PARENTS("r-apb2",
  72                                                       ar100_r_apb2_parents,
  73                                                       &ccu_div_ops,
  74                                                       0),
  75         },
  76 };
  77
  78 /*
  79  * Information about the gate/resets are gathered from the clock header file
  80  * in the BSP source code, although most of them are unused. The existence
  81  * of the hardware block is verified with "3.1 Memory Mapping" chapter in
  82  * "Allwinner H6 V200 User Manual V1.1"; and the parent APB buses are verified
  83  * with "3.3.2.1 System Bus Tree" chapter inthe same document.
  84  */
  85 static SUNXI_CCU_GATE(r_apb1_timer_clk, "r-apb1-timer", "r-apb1",
  86                       0x11c, BIT(0), 0);
  87 static SUNXI_CCU_GATE(r_apb1_twd_clk,   "r-apb1-twd",   "r-apb1",
  88                       0x12c, BIT(0), 0);
  89 static SUNXI_CCU_GATE(r_apb1_pwm_clk,   "r-apb1-pwm",   "r-apb1",
  90                       0x13c, BIT(0), 0);
  91 static SUNXI_CCU_GATE(r_apb2_uart_clk,  "r-apb2-uart",  "r-apb2",
  92                       0x18c, BIT(0), 0);
  93 static SUNXI_CCU_GATE(r_apb2_i2c_clk,   "r-apb2-i2c",   "r-apb2",
  94                       0x19c, BIT(0), 0);
  95 static SUNXI_CCU_GATE(r_apb2_rsb_clk,   "r-apb2-rsb",   "r-apb2",
  96                       0x1bc, BIT(0), 0);
  97 static SUNXI_CCU_GATE(r_apb1_ir_clk,    "r-apb1-ir",    "r-apb1",
  98                       0x1cc, BIT(0), 0);
  99 static SUNXI_CCU_GATE(r_apb1_w1_clk,    "r-apb1-w1",    "r-apb1",
 100                       0x1ec, BIT(0), 0);
 101 static SUNXI_CCU_GATE(r_apb1_rtc_clk,   "r-apb1-rtc",   "r-apb1",
 102                       0x20c, BIT(0), CLK_IGNORE_UNUSED);
 103
 104 /* Information of IR(RX) mod clock is gathered from BSP source code */
 105 static const char * const r_mod0_default_parents[] = { "osc32k", "osc24M" };
 106 static SUNXI_CCU_MP_WITH_MUX_GATE(ir_clk, "ir",
 107                                   r_mod0_default_parents, 0x1c0,
 108                                   0, 5,         /* M */
 109                                   8, 2,         /* P */
 110                                   24, 1,        /* mux */
 111                                   BIT(31),      /* gate */
 112                                   0);
 113
 114 /*
 115  * BSP didn't use the 1-wire function at all now, and the information about
 116  * this mod clock is guessed from the IR mod clock above. The existence of
 117  * this mod clock is proven by BSP clock header, and the dividers are verified
 118  * by contents in the 1-wire related chapter of the User Manual.
 119  */
 120
 121 static SUNXI_CCU_MP_WITH_MUX_GATE(w1_clk, "w1",
 122                                   r_mod0_default_parents, 0x1e0,
 123                                   0, 5,         /* M */
 124                                   8, 2,         /* P */
 125                                   24, 1,        /* mux */
 126                                   BIT(31),      /* gate */
 127                                   0);
 128
 129 static struct ccu_common *sun50i_h6_r_ccu_clks[] = {
 130         &ar100_clk.common,
 131         &r_apb1_clk.common,
 132         &r_apb2_clk.common,
 133         &r_apb1_timer_clk.common,
 134         &r_apb1_twd_clk.common,
 135         &r_apb1_pwm_clk.common,
 136         &r_apb2_uart_clk.common,
 137         &r_apb2_i2c_clk.common,
 138         &r_apb2_rsb_clk.common,
 139         &r_apb1_ir_clk.common,
 140         &r_apb1_w1_clk.common,
 141         &r_apb1_rtc_clk.common,
 142         &ir_clk.common,
 143         &w1_clk.common,
 144 };
 145
 146 static struct clk_hw_onecell_data sun50i_h6_r_hw_clks = {
 147         .hws    = {
 148                 [CLK_AR100]             = &ar100_clk.common.hw,
 149                 [CLK_R_AHB]             = &r_ahb_clk.hw,
 150                 [CLK_R_APB1]            = &r_apb1_clk.common.hw,
 151                 [CLK_R_APB2]            = &r_apb2_clk.common.hw,
 152                 [CLK_R_APB1_TIMER]      = &r_apb1_timer_clk.common.hw,
 153                 [CLK_R_APB1_TWD]        = &r_apb1_twd_clk.common.hw,
 154                 [CLK_R_APB1_PWM]        = &r_apb1_pwm_clk.common.hw,
 155                 [CLK_R_APB2_UART]       = &r_apb2_uart_clk.common.hw,
 156                 [CLK_R_APB2_I2C]        = &r_apb2_i2c_clk.common.hw,
 157                 [CLK_R_APB2_RSB]        = &r_apb2_rsb_clk.common.hw,
 158                 [CLK_R_APB1_IR]         = &r_apb1_ir_clk.common.hw,
 159                 [CLK_R_APB1_W1]         = &r_apb1_w1_clk.common.hw,
 160                 [CLK_R_APB1_RTC]        = &r_apb1_rtc_clk.common.hw,
 161                 [CLK_IR]                = &ir_clk.common.hw,
 162                 [CLK_W1]                = &w1_clk.common.hw,
 163         },
 164         .num    = CLK_NUMBER,
 165 };
 166
 167 static struct clk_hw_onecell_data sun50i_h616_r_hw_clks = {
 168         .hws    = {
 169                 [CLK_R_AHB]             = &r_ahb_clk.hw,
 170                 [CLK_R_APB1]            = &r_apb1_clk.common.hw,
 171                 [CLK_R_APB2]            = &r_apb2_clk.common.hw,
 172                 [CLK_R_APB1_TWD]        = &r_apb1_twd_clk.common.hw,
 173                 [CLK_R_APB2_I2C]        = &r_apb2_i2c_clk.common.hw,
 174                 [CLK_R_APB2_RSB]        = &r_apb2_rsb_clk.common.hw,
 175                 [CLK_R_APB1_IR]         = &r_apb1_ir_clk.common.hw,
 176                 [CLK_R_APB1_RTC]        = &r_apb1_rtc_clk.common.hw,
 177                 [CLK_IR]                = &ir_clk.common.hw,
 178         },
 179         .num    = CLK_NUMBER,
 180 };
 181
 182 static const struct ccu_reset_map sun50i_h6_r_ccu_resets[] = {
 183         [RST_R_APB1_TIMER]      =  { 0x11c, BIT(16) },
 184         [RST_R_APB1_TWD]        =  { 0x12c, BIT(16) },
 185         [RST_R_APB1_PWM]        =  { 0x13c, BIT(16) },
 186         [RST_R_APB2_UART]       =  { 0x18c, BIT(16) },
 187         [RST_R_APB2_I2C]        =  { 0x19c, BIT(16) },
 188         [RST_R_APB2_RSB]        =  { 0x1bc, BIT(16) },
 189         [RST_R_APB1_IR]         =  { 0x1cc, BIT(16) },
 190         [RST_R_APB1_W1]         =  { 0x1ec, BIT(16) },
 191 };
 192
 193 static const struct ccu_reset_map sun50i_h616_r_ccu_resets[] = {
 194         [RST_R_APB1_TWD]        =  { 0x12c, BIT(16) },
 195         [RST_R_APB2_I2C]        =  { 0x19c, BIT(16) },
 196         [RST_R_APB2_RSB]        =  { 0x1bc, BIT(16) },
 197         [RST_R_APB1_IR]         =  { 0x1cc, BIT(16) },
 198 };
 199
 200 static const struct sunxi_ccu_desc sun50i_h6_r_ccu_desc = {
 201         .ccu_clks       = sun50i_h6_r_ccu_clks,
 202         .num_ccu_clks   = ARRAY_SIZE(sun50i_h6_r_ccu_clks),
 203
 204         .hw_clks        = &sun50i_h6_r_hw_clks,
 205
 206         .resets         = sun50i_h6_r_ccu_resets,
 207         .num_resets     = ARRAY_SIZE(sun50i_h6_r_ccu_resets),
 208 };
 209
 210 static const struct sunxi_ccu_desc sun50i_h616_r_ccu_desc = {
 211         .ccu_clks       = sun50i_h6_r_ccu_clks,
 212         .num_ccu_clks   = ARRAY_SIZE(sun50i_h6_r_ccu_clks),
 213
 214         .hw_clks        = &sun50i_h616_r_hw_clks,
 215
 216         .resets         = sun50i_h616_r_ccu_resets,
 217         .num_resets     = ARRAY_SIZE(sun50i_h616_r_ccu_resets),
 218 };
 219
 220 static int sun50i_h6_r_ccu_probe(struct platform_device *pdev)
 221 {
 222         const struct sunxi_ccu_desc *desc;
 223         void __iomem *reg;
 224
 225         desc = of_device_get_match_data(&pdev->dev);
 226         if (!desc)
 227                 return -EINVAL;
 228
 229         reg = devm_platform_ioremap_resource(pdev, 0);
 230         if (IS_ERR(reg))
 231                 return PTR_ERR(reg);
 232
 233         return devm_sunxi_ccu_probe(&pdev->dev, reg, desc);
 234 }
 235
 236 static const struct of_device_id sun50i_h6_r_ccu_ids[] = {
 237         {
 238                 .compatible = "allwinner,sun50i-h6-r-ccu",
 239                 .data = &sun50i_h6_r_ccu_desc,
 240         },
 241         {
 242                 .compatible = "allwinner,sun50i-h616-r-ccu",
 243                 .data = &sun50i_h616_r_ccu_desc,
 244         },
 245         { }
 246 };
 247 MODULE_DEVICE_TABLE(of, sun50i_h6_r_ccu_ids);
 248
 249 static struct platform_driver sun50i_h6_r_ccu_driver = {
 250         .probe  = sun50i_h6_r_ccu_probe,
 251         .driver = {
 252                 .name                   = "sun50i-h6-r-ccu",
 253                 .suppress_bind_attrs    = true,
 254                 .of_match_table         = sun50i_h6_r_ccu_ids,
 255         },
 256 };
 257 module_platform_driver(sun50i_h6_r_ccu_driver);
 258
 259 MODULE_IMPORT_NS("SUNXI_CCU");
 260 MODULE_DESCRIPTION("Support for the Allwinner H6 and H616 PRCM CCU");
 261 MODULE_LICENSE("GPL");