1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Ingenic JZ4725B SoC CGU driver 4 * 5 * Copyright (C) 2018 Paul Cercueil 6 * Author: Paul Cercueil <paul@crapouillou.net> 7 */ 8 9 #include <linux/clk-provider.h> 10 #include <linux/delay.h> 11 #include <linux/of.h> 12 13 #include <dt-bindings/clock/jz4725b-cgu.h> 14 15 #include "cgu.h" 16 #include "pm.h" 17 18 /* CGU register offsets */ 19 #define CGU_REG_CPCCR 0x00 20 #define CGU_REG_LCR 0x04 21 #define CGU_REG_CPPCR 0x10 22 #define CGU_REG_CLKGR 0x20 23 #define CGU_REG_OPCR 0x24 24 #define CGU_REG_I2SCDR 0x60 25 #define CGU_REG_LPCDR 0x64 26 #define CGU_REG_MSCCDR 0x68 27 #define CGU_REG_SSICDR 0x74 28 #define CGU_REG_CIMCDR 0x78 29 30 /* bits within the LCR register */ 31 #define LCR_SLEEP BIT(0) 32 33 static struct ingenic_cgu *cgu; 34 35 static const s8 pll_od_encoding[4] = { 36 0x0, 0x1, -1, 0x3, 37 }; 38 39 static const u8 jz4725b_cgu_cpccr_div_table[] = { 40 1, 2, 3, 4, 6, 8, 41 }; 42 43 static const u8 jz4725b_cgu_pll_half_div_table[] = { 44 2, 1, 45 }; 46 47 static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = { 48 49 /* External clocks */ 50 51 [JZ4725B_CLK_EXT] = { "ext", CGU_CLK_EXT }, 52 [JZ4725B_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT }, 53 54 [JZ4725B_CLK_PLL] = { 55 "pll", CGU_CLK_PLL, 56 .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, 57 .pll = { 58 .reg = CGU_REG_CPPCR, 59 .rate_multiplier = 1, 60 .m_shift = 23, 61 .m_bits = 9, 62 .m_offset = 2, 63 .n_shift = 18, 64 .n_bits = 5, 65 .n_offset = 2, 66 .od_shift = 16, 67 .od_bits = 2, 68 .od_max = 4, 69 .od_encoding = pll_od_encoding, 70 .stable_bit = 10, 71 .bypass_reg = CGU_REG_CPPCR, 72 .bypass_bit = 9, 73 .enable_bit = 8, 74 }, 75 }, 76 77 /* Muxes & dividers */ 78 79 [JZ4725B_CLK_PLL_HALF] = { 80 "pll half", CGU_CLK_DIV, 81 .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, 82 .div = { 83 CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1, 84 jz4725b_cgu_pll_half_div_table, 85 }, 86 }, 87 88 [JZ4725B_CLK_CCLK] = { 89 "cclk", CGU_CLK_DIV, 90 .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, 91 .div = { 92 CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 93 jz4725b_cgu_cpccr_div_table, 94 }, 95 }, 96 97 [JZ4725B_CLK_HCLK] = { 98 "hclk", CGU_CLK_DIV, 99 .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, 100 .div = { 101 CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 102 jz4725b_cgu_cpccr_div_table, 103 }, 104 }, 105 106 [JZ4725B_CLK_PCLK] = { 107 "pclk", CGU_CLK_DIV, 108 .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, 109 .div = { 110 CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 111 jz4725b_cgu_cpccr_div_table, 112 }, 113 }, 114 115 [JZ4725B_CLK_MCLK] = { 116 "mclk", CGU_CLK_DIV, 117 .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, 118 .div = { 119 CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 120 jz4725b_cgu_cpccr_div_table, 121 }, 122 }, 123 124 [JZ4725B_CLK_IPU] = { 125 "ipu", CGU_CLK_DIV | CGU_CLK_GATE, 126 .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, 127 .div = { 128 CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1, 129 jz4725b_cgu_cpccr_div_table, 130 }, 131 .gate = { CGU_REG_CLKGR, 13 }, 132 }, 133 134 [JZ4725B_CLK_LCD] = { 135 "lcd", CGU_CLK_DIV | CGU_CLK_GATE, 136 .parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 }, 137 .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 }, 138 .gate = { CGU_REG_CLKGR, 9 }, 139 }, 140 141 [JZ4725B_CLK_I2S] = { 142 "i2s", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, 143 .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 }, 144 .mux = { CGU_REG_CPCCR, 31, 1 }, 145 .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 }, 146 .gate = { CGU_REG_CLKGR, 6 }, 147 }, 148 149 [JZ4725B_CLK_SPI] = { 150 "spi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, 151 .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL, -1, -1 }, 152 .mux = { CGU_REG_SSICDR, 31, 1 }, 153 .div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 }, 154 .gate = { CGU_REG_CLKGR, 4 }, 155 }, 156 157 [JZ4725B_CLK_MMC_MUX] = { 158 "mmc_mux", CGU_CLK_DIV, 159 .parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 }, 160 .div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 }, 161 }, 162 163 [JZ4725B_CLK_UDC] = { 164 "udc", CGU_CLK_MUX | CGU_CLK_DIV, 165 .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 }, 166 .mux = { CGU_REG_CPCCR, 29, 1 }, 167 .div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 }, 168 }, 169 170 /* Gate-only clocks */ 171 172 [JZ4725B_CLK_UART] = { 173 "uart", CGU_CLK_GATE, 174 .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, 175 .gate = { CGU_REG_CLKGR, 0 }, 176 }, 177 178 [JZ4725B_CLK_DMA] = { 179 "dma", CGU_CLK_GATE, 180 .parents = { JZ4725B_CLK_PCLK, -1, -1, -1 }, 181 .gate = { CGU_REG_CLKGR, 12 }, 182 }, 183 184 [JZ4725B_CLK_ADC] = { 185 "adc", CGU_CLK_GATE, 186 .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, 187 .gate = { CGU_REG_CLKGR, 7 }, 188 }, 189 190 [JZ4725B_CLK_I2C] = { 191 "i2c", CGU_CLK_GATE, 192 .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, 193 .gate = { CGU_REG_CLKGR, 3 }, 194 }, 195 196 [JZ4725B_CLK_AIC] = { 197 "aic", CGU_CLK_GATE, 198 .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, 199 .gate = { CGU_REG_CLKGR, 5 }, 200 }, 201 202 [JZ4725B_CLK_MMC0] = { 203 "mmc0", CGU_CLK_GATE, 204 .parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 }, 205 .gate = { CGU_REG_CLKGR, 6 }, 206 }, 207 208 [JZ4725B_CLK_MMC1] = { 209 "mmc1", CGU_CLK_GATE, 210 .parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 }, 211 .gate = { CGU_REG_CLKGR, 16 }, 212 }, 213 214 [JZ4725B_CLK_BCH] = { 215 "bch", CGU_CLK_GATE, 216 .parents = { JZ4725B_CLK_MCLK/* not sure */, -1, -1, -1 }, 217 .gate = { CGU_REG_CLKGR, 11 }, 218 }, 219 220 [JZ4725B_CLK_TCU] = { 221 "tcu", CGU_CLK_GATE, 222 .parents = { JZ4725B_CLK_EXT/* not sure */, -1, -1, -1 }, 223 .gate = { CGU_REG_CLKGR, 1 }, 224 }, 225 226 [JZ4725B_CLK_EXT512] = { 227 "ext/512", CGU_CLK_FIXDIV, 228 .parents = { JZ4725B_CLK_EXT }, 229 230 /* Doc calls it EXT512, but it seems to be /256... */ 231 .fixdiv = { 256 }, 232 }, 233 234 [JZ4725B_CLK_RTC] = { 235 "rtc", CGU_CLK_MUX, 236 .parents = { JZ4725B_CLK_EXT512, JZ4725B_CLK_OSC32K, -1, -1 }, 237 .mux = { CGU_REG_OPCR, 2, 1}, 238 }, 239 240 [JZ4725B_CLK_UDC_PHY] = { 241 "udc_phy", CGU_CLK_GATE, 242 .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, 243 .gate = { CGU_REG_OPCR, 6, true }, 244 }, 245 }; 246 247 static void __init jz4725b_cgu_init(struct device_node *np) 248 { 249 int retval; 250 251 cgu = ingenic_cgu_new(jz4725b_cgu_clocks, 252 ARRAY_SIZE(jz4725b_cgu_clocks), np); 253 if (!cgu) { 254 pr_err("%s: failed to initialise CGU\n", __func__); 255 return; 256 } 257 258 retval = ingenic_cgu_register_clocks(cgu); 259 if (retval) 260 pr_err("%s: failed to register CGU Clocks\n", __func__); 261 262 ingenic_cgu_register_syscore_ops(cgu); 263 } 264 CLK_OF_DECLARE_DRIVER(jz4725b_cgu, "ingenic,jz4725b-cgu", jz4725b_cgu_init); 265