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 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 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_LICENSE("GPL"); 261