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_device.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); 101 102 /* Information of IR(RX) mod clock is gathered from BSP source code */ 103 static const char * const r_mod0_default_parents[] = { "osc32k", "osc24M" }; 104 static SUNXI_CCU_MP_WITH_MUX_GATE(ir_clk, "ir", 105 r_mod0_default_parents, 0x1c0, 106 0, 5, /* M */ 107 8, 2, /* P */ 108 24, 1, /* mux */ 109 BIT(31), /* gate */ 110 0); 111 112 /* 113 * BSP didn't use the 1-wire function at all now, and the information about 114 * this mod clock is guessed from the IR mod clock above. The existence of 115 * this mod clock is proven by BSP clock header, and the dividers are verified 116 * by contents in the 1-wire related chapter of the User Manual. 117 */ 118 119 static SUNXI_CCU_MP_WITH_MUX_GATE(w1_clk, "w1", 120 r_mod0_default_parents, 0x1e0, 121 0, 5, /* M */ 122 8, 2, /* P */ 123 24, 1, /* mux */ 124 BIT(31), /* gate */ 125 0); 126 127 static struct ccu_common *sun50i_h6_r_ccu_clks[] = { 128 &ar100_clk.common, 129 &r_apb1_clk.common, 130 &r_apb2_clk.common, 131 &r_apb1_timer_clk.common, 132 &r_apb1_twd_clk.common, 133 &r_apb1_pwm_clk.common, 134 &r_apb2_uart_clk.common, 135 &r_apb2_i2c_clk.common, 136 &r_apb2_rsb_clk.common, 137 &r_apb1_ir_clk.common, 138 &r_apb1_w1_clk.common, 139 &ir_clk.common, 140 &w1_clk.common, 141 }; 142 143 static struct ccu_common *sun50i_h616_r_ccu_clks[] = { 144 &r_apb1_clk.common, 145 &r_apb2_clk.common, 146 &r_apb1_twd_clk.common, 147 &r_apb2_i2c_clk.common, 148 &r_apb2_rsb_clk.common, 149 &r_apb1_ir_clk.common, 150 &ir_clk.common, 151 }; 152 153 static struct clk_hw_onecell_data sun50i_h6_r_hw_clks = { 154 .hws = { 155 [CLK_AR100] = &ar100_clk.common.hw, 156 [CLK_R_AHB] = &r_ahb_clk.hw, 157 [CLK_R_APB1] = &r_apb1_clk.common.hw, 158 [CLK_R_APB2] = &r_apb2_clk.common.hw, 159 [CLK_R_APB1_TIMER] = &r_apb1_timer_clk.common.hw, 160 [CLK_R_APB1_TWD] = &r_apb1_twd_clk.common.hw, 161 [CLK_R_APB1_PWM] = &r_apb1_pwm_clk.common.hw, 162 [CLK_R_APB2_UART] = &r_apb2_uart_clk.common.hw, 163 [CLK_R_APB2_I2C] = &r_apb2_i2c_clk.common.hw, 164 [CLK_R_APB2_RSB] = &r_apb2_rsb_clk.common.hw, 165 [CLK_R_APB1_IR] = &r_apb1_ir_clk.common.hw, 166 [CLK_R_APB1_W1] = &r_apb1_w1_clk.common.hw, 167 [CLK_IR] = &ir_clk.common.hw, 168 [CLK_W1] = &w1_clk.common.hw, 169 }, 170 .num = CLK_NUMBER, 171 }; 172 173 static struct clk_hw_onecell_data sun50i_h616_r_hw_clks = { 174 .hws = { 175 [CLK_R_AHB] = &r_ahb_clk.hw, 176 [CLK_R_APB1] = &r_apb1_clk.common.hw, 177 [CLK_R_APB2] = &r_apb2_clk.common.hw, 178 [CLK_R_APB1_TWD] = &r_apb1_twd_clk.common.hw, 179 [CLK_R_APB2_I2C] = &r_apb2_i2c_clk.common.hw, 180 [CLK_R_APB2_RSB] = &r_apb2_rsb_clk.common.hw, 181 [CLK_R_APB1_IR] = &r_apb1_ir_clk.common.hw, 182 [CLK_IR] = &ir_clk.common.hw, 183 }, 184 .num = CLK_NUMBER, 185 }; 186 187 static struct ccu_reset_map sun50i_h6_r_ccu_resets[] = { 188 [RST_R_APB1_TIMER] = { 0x11c, BIT(16) }, 189 [RST_R_APB1_TWD] = { 0x12c, BIT(16) }, 190 [RST_R_APB1_PWM] = { 0x13c, BIT(16) }, 191 [RST_R_APB2_UART] = { 0x18c, BIT(16) }, 192 [RST_R_APB2_I2C] = { 0x19c, BIT(16) }, 193 [RST_R_APB2_RSB] = { 0x1bc, BIT(16) }, 194 [RST_R_APB1_IR] = { 0x1cc, BIT(16) }, 195 [RST_R_APB1_W1] = { 0x1ec, BIT(16) }, 196 }; 197 198 static struct ccu_reset_map sun50i_h616_r_ccu_resets[] = { 199 [RST_R_APB1_TWD] = { 0x12c, BIT(16) }, 200 [RST_R_APB2_I2C] = { 0x19c, BIT(16) }, 201 [RST_R_APB2_RSB] = { 0x1bc, BIT(16) }, 202 [RST_R_APB1_IR] = { 0x1cc, BIT(16) }, 203 }; 204 205 static const struct sunxi_ccu_desc sun50i_h6_r_ccu_desc = { 206 .ccu_clks = sun50i_h6_r_ccu_clks, 207 .num_ccu_clks = ARRAY_SIZE(sun50i_h6_r_ccu_clks), 208 209 .hw_clks = &sun50i_h6_r_hw_clks, 210 211 .resets = sun50i_h6_r_ccu_resets, 212 .num_resets = ARRAY_SIZE(sun50i_h6_r_ccu_resets), 213 }; 214 215 static const struct sunxi_ccu_desc sun50i_h616_r_ccu_desc = { 216 .ccu_clks = sun50i_h616_r_ccu_clks, 217 .num_ccu_clks = ARRAY_SIZE(sun50i_h616_r_ccu_clks), 218 219 .hw_clks = &sun50i_h616_r_hw_clks, 220 221 .resets = sun50i_h616_r_ccu_resets, 222 .num_resets = ARRAY_SIZE(sun50i_h616_r_ccu_resets), 223 }; 224 225 static int sun50i_h6_r_ccu_probe(struct platform_device *pdev) 226 { 227 const struct sunxi_ccu_desc *desc; 228 void __iomem *reg; 229 230 desc = of_device_get_match_data(&pdev->dev); 231 if (!desc) 232 return -EINVAL; 233 234 reg = devm_platform_ioremap_resource(pdev, 0); 235 if (IS_ERR(reg)) 236 return PTR_ERR(reg); 237 238 return devm_sunxi_ccu_probe(&pdev->dev, reg, desc); 239 } 240 241 static const struct of_device_id sun50i_h6_r_ccu_ids[] = { 242 { 243 .compatible = "allwinner,sun50i-h6-r-ccu", 244 .data = &sun50i_h6_r_ccu_desc, 245 }, 246 { 247 .compatible = "allwinner,sun50i-h616-r-ccu", 248 .data = &sun50i_h616_r_ccu_desc, 249 }, 250 { } 251 }; 252 253 static struct platform_driver sun50i_h6_r_ccu_driver = { 254 .probe = sun50i_h6_r_ccu_probe, 255 .driver = { 256 .name = "sun50i-h6-r-ccu", 257 .suppress_bind_attrs = true, 258 .of_match_table = sun50i_h6_r_ccu_ids, 259 }, 260 }; 261 module_platform_driver(sun50i_h6_r_ccu_driver); 262 263 MODULE_IMPORT_NS(SUNXI_CCU); 264 MODULE_LICENSE("GPL"); 265