1 /* 2 * Author: Daniel Thompson <daniel.thompson@linaro.org> 3 * 4 * Inspired by clk-asm9260.c . 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along with 16 * this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include <linux/clk-provider.h> 20 #include <linux/err.h> 21 #include <linux/io.h> 22 #include <linux/iopoll.h> 23 #include <linux/ioport.h> 24 #include <linux/slab.h> 25 #include <linux/spinlock.h> 26 #include <linux/of.h> 27 #include <linux/of_address.h> 28 #include <linux/regmap.h> 29 #include <linux/mfd/syscon.h> 30 31 /* 32 * Include list of clocks wich are not derived from system clock (SYSCLOCK) 33 * The index of these clocks is the secondary index of DT bindings 34 * 35 */ 36 #include <dt-bindings/clock/stm32fx-clock.h> 37 38 #define STM32F4_RCC_CR 0x00 39 #define STM32F4_RCC_PLLCFGR 0x04 40 #define STM32F4_RCC_CFGR 0x08 41 #define STM32F4_RCC_AHB1ENR 0x30 42 #define STM32F4_RCC_AHB2ENR 0x34 43 #define STM32F4_RCC_AHB3ENR 0x38 44 #define STM32F4_RCC_APB1ENR 0x40 45 #define STM32F4_RCC_APB2ENR 0x44 46 #define STM32F4_RCC_BDCR 0x70 47 #define STM32F4_RCC_CSR 0x74 48 #define STM32F4_RCC_PLLI2SCFGR 0x84 49 #define STM32F4_RCC_PLLSAICFGR 0x88 50 #define STM32F4_RCC_DCKCFGR 0x8c 51 #define STM32F7_RCC_DCKCFGR2 0x90 52 53 #define NONE -1 54 #define NO_IDX NONE 55 #define NO_MUX NONE 56 #define NO_GATE NONE 57 58 struct stm32f4_gate_data { 59 u8 offset; 60 u8 bit_idx; 61 const char *name; 62 const char *parent_name; 63 unsigned long flags; 64 }; 65 66 static const struct stm32f4_gate_data stm32f429_gates[] __initconst = { 67 { STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" }, 68 { STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" }, 69 { STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" }, 70 { STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" }, 71 { STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" }, 72 { STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" }, 73 { STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" }, 74 { STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" }, 75 { STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" }, 76 { STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" }, 77 { STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" }, 78 { STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" }, 79 { STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" }, 80 { STM32F4_RCC_AHB1ENR, 20, "ccmdatam", "ahb_div" }, 81 { STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" }, 82 { STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" }, 83 { STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" }, 84 { STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" }, 85 { STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" }, 86 { STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" }, 87 { STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" }, 88 { STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" }, 89 { STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" }, 90 91 { STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" }, 92 { STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" }, 93 { STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" }, 94 { STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" }, 95 { STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" }, 96 97 { STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div", 98 CLK_IGNORE_UNUSED }, 99 100 { STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" }, 101 { STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" }, 102 { STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" }, 103 { STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" }, 104 { STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" }, 105 { STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" }, 106 { STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" }, 107 { STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" }, 108 { STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" }, 109 { STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" }, 110 { STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" }, 111 { STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" }, 112 { STM32F4_RCC_APB1ENR, 17, "uart2", "apb1_div" }, 113 { STM32F4_RCC_APB1ENR, 18, "uart3", "apb1_div" }, 114 { STM32F4_RCC_APB1ENR, 19, "uart4", "apb1_div" }, 115 { STM32F4_RCC_APB1ENR, 20, "uart5", "apb1_div" }, 116 { STM32F4_RCC_APB1ENR, 21, "i2c1", "apb1_div" }, 117 { STM32F4_RCC_APB1ENR, 22, "i2c2", "apb1_div" }, 118 { STM32F4_RCC_APB1ENR, 23, "i2c3", "apb1_div" }, 119 { STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" }, 120 { STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" }, 121 { STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" }, 122 { STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" }, 123 { STM32F4_RCC_APB1ENR, 30, "uart7", "apb1_div" }, 124 { STM32F4_RCC_APB1ENR, 31, "uart8", "apb1_div" }, 125 126 { STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" }, 127 { STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" }, 128 { STM32F4_RCC_APB2ENR, 4, "usart1", "apb2_div" }, 129 { STM32F4_RCC_APB2ENR, 5, "usart6", "apb2_div" }, 130 { STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" }, 131 { STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" }, 132 { STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" }, 133 { STM32F4_RCC_APB2ENR, 11, "sdio", "pll48" }, 134 { STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" }, 135 { STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" }, 136 { STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" }, 137 { STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" }, 138 { STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" }, 139 { STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" }, 140 { STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" }, 141 { STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" }, 142 { STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" }, 143 { STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div" }, 144 }; 145 146 static const struct stm32f4_gate_data stm32f469_gates[] __initconst = { 147 { STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" }, 148 { STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" }, 149 { STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" }, 150 { STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" }, 151 { STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" }, 152 { STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" }, 153 { STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" }, 154 { STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" }, 155 { STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" }, 156 { STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" }, 157 { STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" }, 158 { STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" }, 159 { STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" }, 160 { STM32F4_RCC_AHB1ENR, 20, "ccmdatam", "ahb_div" }, 161 { STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" }, 162 { STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" }, 163 { STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" }, 164 { STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" }, 165 { STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" }, 166 { STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" }, 167 { STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" }, 168 { STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" }, 169 { STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" }, 170 171 { STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" }, 172 { STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" }, 173 { STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" }, 174 { STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" }, 175 { STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" }, 176 177 { STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div", 178 CLK_IGNORE_UNUSED }, 179 { STM32F4_RCC_AHB3ENR, 1, "qspi", "ahb_div", 180 CLK_IGNORE_UNUSED }, 181 182 { STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" }, 183 { STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" }, 184 { STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" }, 185 { STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" }, 186 { STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" }, 187 { STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" }, 188 { STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" }, 189 { STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" }, 190 { STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" }, 191 { STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" }, 192 { STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" }, 193 { STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" }, 194 { STM32F4_RCC_APB1ENR, 17, "uart2", "apb1_div" }, 195 { STM32F4_RCC_APB1ENR, 18, "uart3", "apb1_div" }, 196 { STM32F4_RCC_APB1ENR, 19, "uart4", "apb1_div" }, 197 { STM32F4_RCC_APB1ENR, 20, "uart5", "apb1_div" }, 198 { STM32F4_RCC_APB1ENR, 21, "i2c1", "apb1_div" }, 199 { STM32F4_RCC_APB1ENR, 22, "i2c2", "apb1_div" }, 200 { STM32F4_RCC_APB1ENR, 23, "i2c3", "apb1_div" }, 201 { STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" }, 202 { STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" }, 203 { STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" }, 204 { STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" }, 205 { STM32F4_RCC_APB1ENR, 30, "uart7", "apb1_div" }, 206 { STM32F4_RCC_APB1ENR, 31, "uart8", "apb1_div" }, 207 208 { STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" }, 209 { STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" }, 210 { STM32F4_RCC_APB2ENR, 4, "usart1", "apb2_div" }, 211 { STM32F4_RCC_APB2ENR, 5, "usart6", "apb2_div" }, 212 { STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" }, 213 { STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" }, 214 { STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" }, 215 { STM32F4_RCC_APB2ENR, 11, "sdio", "sdmux" }, 216 { STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" }, 217 { STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" }, 218 { STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" }, 219 { STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" }, 220 { STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" }, 221 { STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" }, 222 { STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" }, 223 { STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" }, 224 { STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" }, 225 { STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div" }, 226 }; 227 228 static const struct stm32f4_gate_data stm32f746_gates[] __initconst = { 229 { STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" }, 230 { STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" }, 231 { STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" }, 232 { STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" }, 233 { STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" }, 234 { STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" }, 235 { STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" }, 236 { STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" }, 237 { STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" }, 238 { STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" }, 239 { STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" }, 240 { STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" }, 241 { STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" }, 242 { STM32F4_RCC_AHB1ENR, 20, "dtcmram", "ahb_div" }, 243 { STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" }, 244 { STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" }, 245 { STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" }, 246 { STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" }, 247 { STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" }, 248 { STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" }, 249 { STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" }, 250 { STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" }, 251 { STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" }, 252 253 { STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" }, 254 { STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" }, 255 { STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" }, 256 { STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" }, 257 { STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" }, 258 259 { STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div", 260 CLK_IGNORE_UNUSED }, 261 { STM32F4_RCC_AHB3ENR, 1, "qspi", "ahb_div", 262 CLK_IGNORE_UNUSED }, 263 264 { STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" }, 265 { STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" }, 266 { STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" }, 267 { STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" }, 268 { STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" }, 269 { STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" }, 270 { STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" }, 271 { STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" }, 272 { STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" }, 273 { STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" }, 274 { STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" }, 275 { STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" }, 276 { STM32F4_RCC_APB1ENR, 16, "spdifrx", "apb1_div" }, 277 { STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" }, 278 { STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" }, 279 { STM32F4_RCC_APB1ENR, 27, "cec", "apb1_div" }, 280 { STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" }, 281 { STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" }, 282 283 { STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" }, 284 { STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" }, 285 { STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" }, 286 { STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" }, 287 { STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" }, 288 { STM32F4_RCC_APB2ENR, 11, "sdmmc", "sdmux" }, 289 { STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" }, 290 { STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" }, 291 { STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" }, 292 { STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" }, 293 { STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" }, 294 { STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" }, 295 { STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" }, 296 { STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" }, 297 { STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" }, 298 { STM32F4_RCC_APB2ENR, 23, "sai2", "apb2_div" }, 299 { STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div" }, 300 }; 301 302 /* 303 * This bitmask tells us which bit offsets (0..192) on STM32F4[23]xxx 304 * have gate bits associated with them. Its combined hweight is 71. 305 */ 306 #define MAX_GATE_MAP 3 307 308 static const u64 stm32f42xx_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull, 309 0x0000000000000001ull, 310 0x04777f33f6fec9ffull }; 311 312 static const u64 stm32f46xx_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull, 313 0x0000000000000003ull, 314 0x0c777f33f6fec9ffull }; 315 316 static const u64 stm32f746_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull, 317 0x0000000000000003ull, 318 0x04f77f033e01c9ffull }; 319 320 static const u64 *stm32f4_gate_map; 321 322 static struct clk_hw **clks; 323 324 static DEFINE_SPINLOCK(stm32f4_clk_lock); 325 static void __iomem *base; 326 327 static struct regmap *pdrm; 328 329 static int stm32fx_end_primary_clk; 330 331 /* 332 * "Multiplier" device for APBx clocks. 333 * 334 * The APBx dividers are power-of-two dividers and, if *not* running in 1:1 335 * mode, they also tap out the one of the low order state bits to run the 336 * timers. ST datasheets represent this feature as a (conditional) clock 337 * multiplier. 338 */ 339 struct clk_apb_mul { 340 struct clk_hw hw; 341 u8 bit_idx; 342 }; 343 344 #define to_clk_apb_mul(_hw) container_of(_hw, struct clk_apb_mul, hw) 345 346 static unsigned long clk_apb_mul_recalc_rate(struct clk_hw *hw, 347 unsigned long parent_rate) 348 { 349 struct clk_apb_mul *am = to_clk_apb_mul(hw); 350 351 if (readl(base + STM32F4_RCC_CFGR) & BIT(am->bit_idx)) 352 return parent_rate * 2; 353 354 return parent_rate; 355 } 356 357 static long clk_apb_mul_round_rate(struct clk_hw *hw, unsigned long rate, 358 unsigned long *prate) 359 { 360 struct clk_apb_mul *am = to_clk_apb_mul(hw); 361 unsigned long mult = 1; 362 363 if (readl(base + STM32F4_RCC_CFGR) & BIT(am->bit_idx)) 364 mult = 2; 365 366 if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) { 367 unsigned long best_parent = rate / mult; 368 369 *prate = clk_hw_round_rate(clk_hw_get_parent(hw), best_parent); 370 } 371 372 return *prate * mult; 373 } 374 375 static int clk_apb_mul_set_rate(struct clk_hw *hw, unsigned long rate, 376 unsigned long parent_rate) 377 { 378 /* 379 * We must report success but we can do so unconditionally because 380 * clk_apb_mul_round_rate returns values that ensure this call is a 381 * nop. 382 */ 383 384 return 0; 385 } 386 387 static const struct clk_ops clk_apb_mul_factor_ops = { 388 .round_rate = clk_apb_mul_round_rate, 389 .set_rate = clk_apb_mul_set_rate, 390 .recalc_rate = clk_apb_mul_recalc_rate, 391 }; 392 393 static struct clk *clk_register_apb_mul(struct device *dev, const char *name, 394 const char *parent_name, 395 unsigned long flags, u8 bit_idx) 396 { 397 struct clk_apb_mul *am; 398 struct clk_init_data init; 399 struct clk *clk; 400 401 am = kzalloc(sizeof(*am), GFP_KERNEL); 402 if (!am) 403 return ERR_PTR(-ENOMEM); 404 405 am->bit_idx = bit_idx; 406 am->hw.init = &init; 407 408 init.name = name; 409 init.ops = &clk_apb_mul_factor_ops; 410 init.flags = flags; 411 init.parent_names = &parent_name; 412 init.num_parents = 1; 413 414 clk = clk_register(dev, &am->hw); 415 416 if (IS_ERR(clk)) 417 kfree(am); 418 419 return clk; 420 } 421 422 enum { 423 PLL, 424 PLL_I2S, 425 PLL_SAI, 426 }; 427 428 static const struct clk_div_table pll_divp_table[] = { 429 { 0, 2 }, { 1, 4 }, { 2, 6 }, { 3, 8 }, { 0 } 430 }; 431 432 static const struct clk_div_table pll_divq_table[] = { 433 { 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 }, { 7, 7 }, 434 { 8, 8 }, { 9, 9 }, { 10, 10 }, { 11, 11 }, { 12, 12 }, { 13, 13 }, 435 { 14, 14 }, { 15, 15 }, 436 { 0 } 437 }; 438 439 static const struct clk_div_table pll_divr_table[] = { 440 { 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 }, { 7, 7 }, { 0 } 441 }; 442 443 struct stm32f4_pll { 444 spinlock_t *lock; 445 struct clk_gate gate; 446 u8 offset; 447 u8 bit_rdy_idx; 448 u8 status; 449 u8 n_start; 450 }; 451 452 #define to_stm32f4_pll(_gate) container_of(_gate, struct stm32f4_pll, gate) 453 454 struct stm32f4_pll_post_div_data { 455 int idx; 456 u8 pll_num; 457 const char *name; 458 const char *parent; 459 u8 flag; 460 u8 offset; 461 u8 shift; 462 u8 width; 463 u8 flag_div; 464 const struct clk_div_table *div_table; 465 }; 466 467 struct stm32f4_vco_data { 468 const char *vco_name; 469 u8 offset; 470 u8 bit_idx; 471 u8 bit_rdy_idx; 472 }; 473 474 static const struct stm32f4_vco_data vco_data[] = { 475 { "vco", STM32F4_RCC_PLLCFGR, 24, 25 }, 476 { "vco-i2s", STM32F4_RCC_PLLI2SCFGR, 26, 27 }, 477 { "vco-sai", STM32F4_RCC_PLLSAICFGR, 28, 29 }, 478 }; 479 480 481 static const struct clk_div_table post_divr_table[] = { 482 { 0, 2 }, { 1, 4 }, { 2, 8 }, { 3, 16 }, { 0 } 483 }; 484 485 #define MAX_POST_DIV 3 486 static const struct stm32f4_pll_post_div_data post_div_data[MAX_POST_DIV] = { 487 { CLK_I2SQ_PDIV, PLL_I2S, "plli2s-q-div", "plli2s-q", 488 CLK_SET_RATE_PARENT, STM32F4_RCC_DCKCFGR, 0, 5, 0, NULL}, 489 490 { CLK_SAIQ_PDIV, PLL_SAI, "pllsai-q-div", "pllsai-q", 491 CLK_SET_RATE_PARENT, STM32F4_RCC_DCKCFGR, 8, 5, 0, NULL }, 492 493 { NO_IDX, PLL_SAI, "pllsai-r-div", "pllsai-r", CLK_SET_RATE_PARENT, 494 STM32F4_RCC_DCKCFGR, 16, 2, 0, post_divr_table }, 495 }; 496 497 struct stm32f4_div_data { 498 u8 shift; 499 u8 width; 500 u8 flag_div; 501 const struct clk_div_table *div_table; 502 }; 503 504 #define MAX_PLL_DIV 3 505 static const struct stm32f4_div_data div_data[MAX_PLL_DIV] = { 506 { 16, 2, 0, pll_divp_table }, 507 { 24, 4, 0, pll_divq_table }, 508 { 28, 3, 0, pll_divr_table }, 509 }; 510 511 struct stm32f4_pll_data { 512 u8 pll_num; 513 u8 n_start; 514 const char *div_name[MAX_PLL_DIV]; 515 }; 516 517 static const struct stm32f4_pll_data stm32f429_pll[MAX_PLL_DIV] = { 518 { PLL, 192, { "pll", "pll48", NULL } }, 519 { PLL_I2S, 192, { NULL, "plli2s-q", "plli2s-r" } }, 520 { PLL_SAI, 49, { NULL, "pllsai-q", "pllsai-r" } }, 521 }; 522 523 static const struct stm32f4_pll_data stm32f469_pll[MAX_PLL_DIV] = { 524 { PLL, 50, { "pll", "pll-q", NULL } }, 525 { PLL_I2S, 50, { "plli2s-p", "plli2s-q", "plli2s-r" } }, 526 { PLL_SAI, 50, { "pllsai-p", "pllsai-q", "pllsai-r" } }, 527 }; 528 529 static int stm32f4_pll_is_enabled(struct clk_hw *hw) 530 { 531 return clk_gate_ops.is_enabled(hw); 532 } 533 534 #define PLL_TIMEOUT 10000 535 536 static int stm32f4_pll_enable(struct clk_hw *hw) 537 { 538 struct clk_gate *gate = to_clk_gate(hw); 539 struct stm32f4_pll *pll = to_stm32f4_pll(gate); 540 int bit_status; 541 unsigned int timeout = PLL_TIMEOUT; 542 543 if (clk_gate_ops.is_enabled(hw)) 544 return 0; 545 546 clk_gate_ops.enable(hw); 547 548 do { 549 bit_status = !(readl(gate->reg) & BIT(pll->bit_rdy_idx)); 550 551 } while (bit_status && --timeout); 552 553 return bit_status; 554 } 555 556 static void stm32f4_pll_disable(struct clk_hw *hw) 557 { 558 clk_gate_ops.disable(hw); 559 } 560 561 static unsigned long stm32f4_pll_recalc(struct clk_hw *hw, 562 unsigned long parent_rate) 563 { 564 struct clk_gate *gate = to_clk_gate(hw); 565 struct stm32f4_pll *pll = to_stm32f4_pll(gate); 566 unsigned long n; 567 568 n = (readl(base + pll->offset) >> 6) & 0x1ff; 569 570 return parent_rate * n; 571 } 572 573 static long stm32f4_pll_round_rate(struct clk_hw *hw, unsigned long rate, 574 unsigned long *prate) 575 { 576 struct clk_gate *gate = to_clk_gate(hw); 577 struct stm32f4_pll *pll = to_stm32f4_pll(gate); 578 unsigned long n; 579 580 n = rate / *prate; 581 582 if (n < pll->n_start) 583 n = pll->n_start; 584 else if (n > 432) 585 n = 432; 586 587 return *prate * n; 588 } 589 590 static int stm32f4_pll_set_rate(struct clk_hw *hw, unsigned long rate, 591 unsigned long parent_rate) 592 { 593 struct clk_gate *gate = to_clk_gate(hw); 594 struct stm32f4_pll *pll = to_stm32f4_pll(gate); 595 596 unsigned long n; 597 unsigned long val; 598 int pll_state; 599 600 pll_state = stm32f4_pll_is_enabled(hw); 601 602 if (pll_state) 603 stm32f4_pll_disable(hw); 604 605 n = rate / parent_rate; 606 607 val = readl(base + pll->offset) & ~(0x1ff << 6); 608 609 writel(val | ((n & 0x1ff) << 6), base + pll->offset); 610 611 if (pll_state) 612 stm32f4_pll_enable(hw); 613 614 return 0; 615 } 616 617 static const struct clk_ops stm32f4_pll_gate_ops = { 618 .enable = stm32f4_pll_enable, 619 .disable = stm32f4_pll_disable, 620 .is_enabled = stm32f4_pll_is_enabled, 621 .recalc_rate = stm32f4_pll_recalc, 622 .round_rate = stm32f4_pll_round_rate, 623 .set_rate = stm32f4_pll_set_rate, 624 }; 625 626 struct stm32f4_pll_div { 627 struct clk_divider div; 628 struct clk_hw *hw_pll; 629 }; 630 631 #define to_pll_div_clk(_div) container_of(_div, struct stm32f4_pll_div, div) 632 633 static unsigned long stm32f4_pll_div_recalc_rate(struct clk_hw *hw, 634 unsigned long parent_rate) 635 { 636 return clk_divider_ops.recalc_rate(hw, parent_rate); 637 } 638 639 static long stm32f4_pll_div_round_rate(struct clk_hw *hw, unsigned long rate, 640 unsigned long *prate) 641 { 642 return clk_divider_ops.round_rate(hw, rate, prate); 643 } 644 645 static int stm32f4_pll_div_set_rate(struct clk_hw *hw, unsigned long rate, 646 unsigned long parent_rate) 647 { 648 int pll_state, ret; 649 650 struct clk_divider *div = to_clk_divider(hw); 651 struct stm32f4_pll_div *pll_div = to_pll_div_clk(div); 652 653 pll_state = stm32f4_pll_is_enabled(pll_div->hw_pll); 654 655 if (pll_state) 656 stm32f4_pll_disable(pll_div->hw_pll); 657 658 ret = clk_divider_ops.set_rate(hw, rate, parent_rate); 659 660 if (pll_state) 661 stm32f4_pll_enable(pll_div->hw_pll); 662 663 return ret; 664 } 665 666 static const struct clk_ops stm32f4_pll_div_ops = { 667 .recalc_rate = stm32f4_pll_div_recalc_rate, 668 .round_rate = stm32f4_pll_div_round_rate, 669 .set_rate = stm32f4_pll_div_set_rate, 670 }; 671 672 static struct clk_hw *clk_register_pll_div(const char *name, 673 const char *parent_name, unsigned long flags, 674 void __iomem *reg, u8 shift, u8 width, 675 u8 clk_divider_flags, const struct clk_div_table *table, 676 struct clk_hw *pll_hw, spinlock_t *lock) 677 { 678 struct stm32f4_pll_div *pll_div; 679 struct clk_hw *hw; 680 struct clk_init_data init; 681 int ret; 682 683 /* allocate the divider */ 684 pll_div = kzalloc(sizeof(*pll_div), GFP_KERNEL); 685 if (!pll_div) 686 return ERR_PTR(-ENOMEM); 687 688 init.name = name; 689 init.ops = &stm32f4_pll_div_ops; 690 init.flags = flags; 691 init.parent_names = (parent_name ? &parent_name : NULL); 692 init.num_parents = (parent_name ? 1 : 0); 693 694 /* struct clk_divider assignments */ 695 pll_div->div.reg = reg; 696 pll_div->div.shift = shift; 697 pll_div->div.width = width; 698 pll_div->div.flags = clk_divider_flags; 699 pll_div->div.lock = lock; 700 pll_div->div.table = table; 701 pll_div->div.hw.init = &init; 702 703 pll_div->hw_pll = pll_hw; 704 705 /* register the clock */ 706 hw = &pll_div->div.hw; 707 ret = clk_hw_register(NULL, hw); 708 if (ret) { 709 kfree(pll_div); 710 hw = ERR_PTR(ret); 711 } 712 713 return hw; 714 } 715 716 static struct clk_hw *stm32f4_rcc_register_pll(const char *pllsrc, 717 const struct stm32f4_pll_data *data, spinlock_t *lock) 718 { 719 struct stm32f4_pll *pll; 720 struct clk_init_data init = { NULL }; 721 void __iomem *reg; 722 struct clk_hw *pll_hw; 723 int ret; 724 int i; 725 const struct stm32f4_vco_data *vco; 726 727 728 pll = kzalloc(sizeof(*pll), GFP_KERNEL); 729 if (!pll) 730 return ERR_PTR(-ENOMEM); 731 732 vco = &vco_data[data->pll_num]; 733 734 init.name = vco->vco_name; 735 init.ops = &stm32f4_pll_gate_ops; 736 init.flags = CLK_SET_RATE_GATE; 737 init.parent_names = &pllsrc; 738 init.num_parents = 1; 739 740 pll->gate.lock = lock; 741 pll->gate.reg = base + STM32F4_RCC_CR; 742 pll->gate.bit_idx = vco->bit_idx; 743 pll->gate.hw.init = &init; 744 745 pll->offset = vco->offset; 746 pll->n_start = data->n_start; 747 pll->bit_rdy_idx = vco->bit_rdy_idx; 748 pll->status = (readl(base + STM32F4_RCC_CR) >> vco->bit_idx) & 0x1; 749 750 reg = base + pll->offset; 751 752 pll_hw = &pll->gate.hw; 753 ret = clk_hw_register(NULL, pll_hw); 754 if (ret) { 755 kfree(pll); 756 return ERR_PTR(ret); 757 } 758 759 for (i = 0; i < MAX_PLL_DIV; i++) 760 if (data->div_name[i]) 761 clk_register_pll_div(data->div_name[i], 762 vco->vco_name, 763 0, 764 reg, 765 div_data[i].shift, 766 div_data[i].width, 767 div_data[i].flag_div, 768 div_data[i].div_table, 769 pll_hw, 770 lock); 771 return pll_hw; 772 } 773 774 /* 775 * Converts the primary and secondary indices (as they appear in DT) to an 776 * offset into our struct clock array. 777 */ 778 static int stm32f4_rcc_lookup_clk_idx(u8 primary, u8 secondary) 779 { 780 u64 table[MAX_GATE_MAP]; 781 782 if (primary == 1) { 783 if (WARN_ON(secondary >= stm32fx_end_primary_clk)) 784 return -EINVAL; 785 return secondary; 786 } 787 788 memcpy(table, stm32f4_gate_map, sizeof(table)); 789 790 /* only bits set in table can be used as indices */ 791 if (WARN_ON(secondary >= BITS_PER_BYTE * sizeof(table) || 792 0 == (table[BIT_ULL_WORD(secondary)] & 793 BIT_ULL_MASK(secondary)))) 794 return -EINVAL; 795 796 /* mask out bits above our current index */ 797 table[BIT_ULL_WORD(secondary)] &= 798 GENMASK_ULL(secondary % BITS_PER_LONG_LONG, 0); 799 800 return stm32fx_end_primary_clk - 1 + hweight64(table[0]) + 801 (BIT_ULL_WORD(secondary) >= 1 ? hweight64(table[1]) : 0) + 802 (BIT_ULL_WORD(secondary) >= 2 ? hweight64(table[2]) : 0); 803 } 804 805 static struct clk_hw * 806 stm32f4_rcc_lookup_clk(struct of_phandle_args *clkspec, void *data) 807 { 808 int i = stm32f4_rcc_lookup_clk_idx(clkspec->args[0], clkspec->args[1]); 809 810 if (i < 0) 811 return ERR_PTR(-EINVAL); 812 813 return clks[i]; 814 } 815 816 #define to_rgclk(_rgate) container_of(_rgate, struct stm32_rgate, gate) 817 818 static inline void disable_power_domain_write_protection(void) 819 { 820 if (pdrm) 821 regmap_update_bits(pdrm, 0x00, (1 << 8), (1 << 8)); 822 } 823 824 static inline void enable_power_domain_write_protection(void) 825 { 826 if (pdrm) 827 regmap_update_bits(pdrm, 0x00, (1 << 8), (0 << 8)); 828 } 829 830 static inline void sofware_reset_backup_domain(void) 831 { 832 unsigned long val; 833 834 val = readl(base + STM32F4_RCC_BDCR); 835 writel(val | BIT(16), base + STM32F4_RCC_BDCR); 836 writel(val & ~BIT(16), base + STM32F4_RCC_BDCR); 837 } 838 839 struct stm32_rgate { 840 struct clk_gate gate; 841 u8 bit_rdy_idx; 842 }; 843 844 #define RGATE_TIMEOUT 50000 845 846 static int rgclk_enable(struct clk_hw *hw) 847 { 848 struct clk_gate *gate = to_clk_gate(hw); 849 struct stm32_rgate *rgate = to_rgclk(gate); 850 int bit_status; 851 unsigned int timeout = RGATE_TIMEOUT; 852 853 if (clk_gate_ops.is_enabled(hw)) 854 return 0; 855 856 disable_power_domain_write_protection(); 857 858 clk_gate_ops.enable(hw); 859 860 do { 861 bit_status = !(readl(gate->reg) & BIT(rgate->bit_rdy_idx)); 862 if (bit_status) 863 udelay(100); 864 865 } while (bit_status && --timeout); 866 867 enable_power_domain_write_protection(); 868 869 return bit_status; 870 } 871 872 static void rgclk_disable(struct clk_hw *hw) 873 { 874 clk_gate_ops.disable(hw); 875 } 876 877 static int rgclk_is_enabled(struct clk_hw *hw) 878 { 879 return clk_gate_ops.is_enabled(hw); 880 } 881 882 static const struct clk_ops rgclk_ops = { 883 .enable = rgclk_enable, 884 .disable = rgclk_disable, 885 .is_enabled = rgclk_is_enabled, 886 }; 887 888 static struct clk_hw *clk_register_rgate(struct device *dev, const char *name, 889 const char *parent_name, unsigned long flags, 890 void __iomem *reg, u8 bit_idx, u8 bit_rdy_idx, 891 u8 clk_gate_flags, spinlock_t *lock) 892 { 893 struct stm32_rgate *rgate; 894 struct clk_init_data init = { NULL }; 895 struct clk_hw *hw; 896 int ret; 897 898 rgate = kzalloc(sizeof(*rgate), GFP_KERNEL); 899 if (!rgate) 900 return ERR_PTR(-ENOMEM); 901 902 init.name = name; 903 init.ops = &rgclk_ops; 904 init.flags = flags; 905 init.parent_names = &parent_name; 906 init.num_parents = 1; 907 908 rgate->bit_rdy_idx = bit_rdy_idx; 909 910 rgate->gate.lock = lock; 911 rgate->gate.reg = reg; 912 rgate->gate.bit_idx = bit_idx; 913 rgate->gate.hw.init = &init; 914 915 hw = &rgate->gate.hw; 916 ret = clk_hw_register(dev, hw); 917 if (ret) { 918 kfree(rgate); 919 hw = ERR_PTR(ret); 920 } 921 922 return hw; 923 } 924 925 static int cclk_gate_enable(struct clk_hw *hw) 926 { 927 int ret; 928 929 disable_power_domain_write_protection(); 930 931 ret = clk_gate_ops.enable(hw); 932 933 enable_power_domain_write_protection(); 934 935 return ret; 936 } 937 938 static void cclk_gate_disable(struct clk_hw *hw) 939 { 940 disable_power_domain_write_protection(); 941 942 clk_gate_ops.disable(hw); 943 944 enable_power_domain_write_protection(); 945 } 946 947 static int cclk_gate_is_enabled(struct clk_hw *hw) 948 { 949 return clk_gate_ops.is_enabled(hw); 950 } 951 952 static const struct clk_ops cclk_gate_ops = { 953 .enable = cclk_gate_enable, 954 .disable = cclk_gate_disable, 955 .is_enabled = cclk_gate_is_enabled, 956 }; 957 958 static u8 cclk_mux_get_parent(struct clk_hw *hw) 959 { 960 return clk_mux_ops.get_parent(hw); 961 } 962 963 static int cclk_mux_set_parent(struct clk_hw *hw, u8 index) 964 { 965 int ret; 966 967 disable_power_domain_write_protection(); 968 969 sofware_reset_backup_domain(); 970 971 ret = clk_mux_ops.set_parent(hw, index); 972 973 enable_power_domain_write_protection(); 974 975 return ret; 976 } 977 978 static const struct clk_ops cclk_mux_ops = { 979 .get_parent = cclk_mux_get_parent, 980 .set_parent = cclk_mux_set_parent, 981 }; 982 983 static struct clk_hw *stm32_register_cclk(struct device *dev, const char *name, 984 const char * const *parent_names, int num_parents, 985 void __iomem *reg, u8 bit_idx, u8 shift, unsigned long flags, 986 spinlock_t *lock) 987 { 988 struct clk_hw *hw; 989 struct clk_gate *gate; 990 struct clk_mux *mux; 991 992 gate = kzalloc(sizeof(*gate), GFP_KERNEL); 993 if (!gate) { 994 hw = ERR_PTR(-EINVAL); 995 goto fail; 996 } 997 998 mux = kzalloc(sizeof(*mux), GFP_KERNEL); 999 if (!mux) { 1000 kfree(gate); 1001 hw = ERR_PTR(-EINVAL); 1002 goto fail; 1003 } 1004 1005 gate->reg = reg; 1006 gate->bit_idx = bit_idx; 1007 gate->flags = 0; 1008 gate->lock = lock; 1009 1010 mux->reg = reg; 1011 mux->shift = shift; 1012 mux->mask = 3; 1013 mux->flags = 0; 1014 1015 hw = clk_hw_register_composite(dev, name, parent_names, num_parents, 1016 &mux->hw, &cclk_mux_ops, 1017 NULL, NULL, 1018 &gate->hw, &cclk_gate_ops, 1019 flags); 1020 1021 if (IS_ERR(hw)) { 1022 kfree(gate); 1023 kfree(mux); 1024 } 1025 1026 fail: 1027 return hw; 1028 } 1029 1030 static const char *sys_parents[] __initdata = { "hsi", NULL, "pll" }; 1031 1032 static const struct clk_div_table ahb_div_table[] = { 1033 { 0x0, 1 }, { 0x1, 1 }, { 0x2, 1 }, { 0x3, 1 }, 1034 { 0x4, 1 }, { 0x5, 1 }, { 0x6, 1 }, { 0x7, 1 }, 1035 { 0x8, 2 }, { 0x9, 4 }, { 0xa, 8 }, { 0xb, 16 }, 1036 { 0xc, 64 }, { 0xd, 128 }, { 0xe, 256 }, { 0xf, 512 }, 1037 { 0 }, 1038 }; 1039 1040 static const struct clk_div_table apb_div_table[] = { 1041 { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, 1042 { 4, 2 }, { 5, 4 }, { 6, 8 }, { 7, 16 }, 1043 { 0 }, 1044 }; 1045 1046 static const char *rtc_parents[4] = { 1047 "no-clock", "lse", "lsi", "hse-rtc" 1048 }; 1049 1050 static const char *lcd_parent[1] = { "pllsai-r-div" }; 1051 1052 static const char *i2s_parents[2] = { "plli2s-r", NULL }; 1053 1054 static const char *sai_parents[4] = { "pllsai-q-div", "plli2s-q-div", NULL, 1055 "no-clock" }; 1056 1057 static const char *pll48_parents[2] = { "pll-q", "pllsai-p" }; 1058 1059 static const char *sdmux_parents[2] = { "pll48", "sys" }; 1060 1061 static const char *hdmi_parents[2] = { "lse", "hsi_div488" }; 1062 1063 static const char *spdif_parent[1] = { "plli2s-p" }; 1064 1065 static const char *lptim_parent[4] = { "apb1_mul", "lsi", "hsi", "lse" }; 1066 1067 static const char *uart_parents1[4] = { "apb2_div", "sys", "hsi", "lse" }; 1068 static const char *uart_parents2[4] = { "apb1_div", "sys", "hsi", "lse" }; 1069 1070 static const char *i2c_parents[4] = { "apb1_div", "sys", "hsi", "no-clock" }; 1071 1072 struct stm32_aux_clk { 1073 int idx; 1074 const char *name; 1075 const char * const *parent_names; 1076 int num_parents; 1077 int offset_mux; 1078 u8 shift; 1079 u8 mask; 1080 int offset_gate; 1081 u8 bit_idx; 1082 unsigned long flags; 1083 }; 1084 1085 struct stm32f4_clk_data { 1086 const struct stm32f4_gate_data *gates_data; 1087 const u64 *gates_map; 1088 int gates_num; 1089 const struct stm32f4_pll_data *pll_data; 1090 const struct stm32_aux_clk *aux_clk; 1091 int aux_clk_num; 1092 int end_primary; 1093 }; 1094 1095 static const struct stm32_aux_clk stm32f429_aux_clk[] = { 1096 { 1097 CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent), 1098 NO_MUX, 0, 0, 1099 STM32F4_RCC_APB2ENR, 26, 1100 CLK_SET_RATE_PARENT 1101 }, 1102 { 1103 CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents), 1104 STM32F4_RCC_CFGR, 23, 1, 1105 NO_GATE, 0, 1106 CLK_SET_RATE_PARENT 1107 }, 1108 { 1109 CLK_SAI1, "sai1-a", sai_parents, ARRAY_SIZE(sai_parents), 1110 STM32F4_RCC_DCKCFGR, 20, 3, 1111 STM32F4_RCC_APB2ENR, 22, 1112 CLK_SET_RATE_PARENT 1113 }, 1114 { 1115 CLK_SAI2, "sai1-b", sai_parents, ARRAY_SIZE(sai_parents), 1116 STM32F4_RCC_DCKCFGR, 22, 3, 1117 STM32F4_RCC_APB2ENR, 22, 1118 CLK_SET_RATE_PARENT 1119 }, 1120 }; 1121 1122 static const struct stm32_aux_clk stm32f469_aux_clk[] = { 1123 { 1124 CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent), 1125 NO_MUX, 0, 0, 1126 STM32F4_RCC_APB2ENR, 26, 1127 CLK_SET_RATE_PARENT 1128 }, 1129 { 1130 CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents), 1131 STM32F4_RCC_CFGR, 23, 1, 1132 NO_GATE, 0, 1133 CLK_SET_RATE_PARENT 1134 }, 1135 { 1136 CLK_SAI1, "sai1-a", sai_parents, ARRAY_SIZE(sai_parents), 1137 STM32F4_RCC_DCKCFGR, 20, 3, 1138 STM32F4_RCC_APB2ENR, 22, 1139 CLK_SET_RATE_PARENT 1140 }, 1141 { 1142 CLK_SAI2, "sai1-b", sai_parents, ARRAY_SIZE(sai_parents), 1143 STM32F4_RCC_DCKCFGR, 22, 3, 1144 STM32F4_RCC_APB2ENR, 22, 1145 CLK_SET_RATE_PARENT 1146 }, 1147 { 1148 NO_IDX, "pll48", pll48_parents, ARRAY_SIZE(pll48_parents), 1149 STM32F4_RCC_DCKCFGR, 27, 1, 1150 NO_GATE, 0, 1151 0 1152 }, 1153 { 1154 NO_IDX, "sdmux", sdmux_parents, ARRAY_SIZE(sdmux_parents), 1155 STM32F4_RCC_DCKCFGR, 28, 1, 1156 NO_GATE, 0, 1157 0 1158 }, 1159 }; 1160 1161 static const struct stm32_aux_clk stm32f746_aux_clk[] = { 1162 { 1163 CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent), 1164 NO_MUX, 0, 0, 1165 STM32F4_RCC_APB2ENR, 26, 1166 CLK_SET_RATE_PARENT 1167 }, 1168 { 1169 CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents), 1170 STM32F4_RCC_CFGR, 23, 1, 1171 NO_GATE, 0, 1172 CLK_SET_RATE_PARENT 1173 }, 1174 { 1175 CLK_SAI1, "sai1_clk", sai_parents, ARRAY_SIZE(sai_parents), 1176 STM32F4_RCC_DCKCFGR, 20, 3, 1177 STM32F4_RCC_APB2ENR, 22, 1178 CLK_SET_RATE_PARENT 1179 }, 1180 { 1181 CLK_SAI2, "sai2_clk", sai_parents, ARRAY_SIZE(sai_parents), 1182 STM32F4_RCC_DCKCFGR, 22, 3, 1183 STM32F4_RCC_APB2ENR, 23, 1184 CLK_SET_RATE_PARENT 1185 }, 1186 { 1187 NO_IDX, "pll48", pll48_parents, ARRAY_SIZE(pll48_parents), 1188 STM32F7_RCC_DCKCFGR2, 27, 1, 1189 NO_GATE, 0, 1190 0 1191 }, 1192 { 1193 NO_IDX, "sdmux", sdmux_parents, ARRAY_SIZE(sdmux_parents), 1194 STM32F7_RCC_DCKCFGR2, 28, 1, 1195 NO_GATE, 0, 1196 0 1197 }, 1198 { 1199 CLK_HDMI_CEC, "hdmi-cec", 1200 hdmi_parents, ARRAY_SIZE(hdmi_parents), 1201 STM32F7_RCC_DCKCFGR2, 26, 1, 1202 NO_GATE, 0, 1203 0 1204 }, 1205 { 1206 CLK_SPDIF, "spdif-rx", 1207 spdif_parent, ARRAY_SIZE(spdif_parent), 1208 STM32F7_RCC_DCKCFGR2, 22, 3, 1209 STM32F4_RCC_APB2ENR, 23, 1210 CLK_SET_RATE_PARENT 1211 }, 1212 { 1213 CLK_USART1, "usart1", 1214 uart_parents1, ARRAY_SIZE(uart_parents1), 1215 STM32F7_RCC_DCKCFGR2, 0, 3, 1216 STM32F4_RCC_APB2ENR, 4, 1217 CLK_SET_RATE_PARENT, 1218 }, 1219 { 1220 CLK_USART2, "usart2", 1221 uart_parents2, ARRAY_SIZE(uart_parents1), 1222 STM32F7_RCC_DCKCFGR2, 2, 3, 1223 STM32F4_RCC_APB1ENR, 17, 1224 CLK_SET_RATE_PARENT, 1225 }, 1226 { 1227 CLK_USART3, "usart3", 1228 uart_parents2, ARRAY_SIZE(uart_parents1), 1229 STM32F7_RCC_DCKCFGR2, 4, 3, 1230 STM32F4_RCC_APB1ENR, 18, 1231 CLK_SET_RATE_PARENT, 1232 }, 1233 { 1234 CLK_UART4, "uart4", 1235 uart_parents2, ARRAY_SIZE(uart_parents1), 1236 STM32F7_RCC_DCKCFGR2, 6, 3, 1237 STM32F4_RCC_APB1ENR, 19, 1238 CLK_SET_RATE_PARENT, 1239 }, 1240 { 1241 CLK_UART5, "uart5", 1242 uart_parents2, ARRAY_SIZE(uart_parents1), 1243 STM32F7_RCC_DCKCFGR2, 8, 3, 1244 STM32F4_RCC_APB1ENR, 20, 1245 CLK_SET_RATE_PARENT, 1246 }, 1247 { 1248 CLK_USART6, "usart6", 1249 uart_parents1, ARRAY_SIZE(uart_parents1), 1250 STM32F7_RCC_DCKCFGR2, 10, 3, 1251 STM32F4_RCC_APB2ENR, 5, 1252 CLK_SET_RATE_PARENT, 1253 }, 1254 1255 { 1256 CLK_UART7, "uart7", 1257 uart_parents2, ARRAY_SIZE(uart_parents1), 1258 STM32F7_RCC_DCKCFGR2, 12, 3, 1259 STM32F4_RCC_APB1ENR, 30, 1260 CLK_SET_RATE_PARENT, 1261 }, 1262 { 1263 CLK_UART8, "uart8", 1264 uart_parents2, ARRAY_SIZE(uart_parents1), 1265 STM32F7_RCC_DCKCFGR2, 14, 3, 1266 STM32F4_RCC_APB1ENR, 31, 1267 CLK_SET_RATE_PARENT, 1268 }, 1269 { 1270 CLK_I2C1, "i2c1", 1271 i2c_parents, ARRAY_SIZE(i2c_parents), 1272 STM32F7_RCC_DCKCFGR2, 16, 3, 1273 STM32F4_RCC_APB1ENR, 21, 1274 CLK_SET_RATE_PARENT, 1275 }, 1276 { 1277 CLK_I2C2, "i2c2", 1278 i2c_parents, ARRAY_SIZE(i2c_parents), 1279 STM32F7_RCC_DCKCFGR2, 18, 3, 1280 STM32F4_RCC_APB1ENR, 22, 1281 CLK_SET_RATE_PARENT, 1282 }, 1283 { 1284 CLK_I2C3, "i2c3", 1285 i2c_parents, ARRAY_SIZE(i2c_parents), 1286 STM32F7_RCC_DCKCFGR2, 20, 3, 1287 STM32F4_RCC_APB1ENR, 23, 1288 CLK_SET_RATE_PARENT, 1289 }, 1290 { 1291 CLK_I2C4, "i2c4", 1292 i2c_parents, ARRAY_SIZE(i2c_parents), 1293 STM32F7_RCC_DCKCFGR2, 22, 3, 1294 STM32F4_RCC_APB1ENR, 24, 1295 CLK_SET_RATE_PARENT, 1296 }, 1297 1298 { 1299 CLK_LPTIMER, "lptim1", 1300 lptim_parent, ARRAY_SIZE(lptim_parent), 1301 STM32F7_RCC_DCKCFGR2, 24, 3, 1302 STM32F4_RCC_APB1ENR, 9, 1303 CLK_SET_RATE_PARENT 1304 }, 1305 }; 1306 1307 static const struct stm32f4_clk_data stm32f429_clk_data = { 1308 .end_primary = END_PRIMARY_CLK, 1309 .gates_data = stm32f429_gates, 1310 .gates_map = stm32f42xx_gate_map, 1311 .gates_num = ARRAY_SIZE(stm32f429_gates), 1312 .pll_data = stm32f429_pll, 1313 .aux_clk = stm32f429_aux_clk, 1314 .aux_clk_num = ARRAY_SIZE(stm32f429_aux_clk), 1315 }; 1316 1317 static const struct stm32f4_clk_data stm32f469_clk_data = { 1318 .end_primary = END_PRIMARY_CLK, 1319 .gates_data = stm32f469_gates, 1320 .gates_map = stm32f46xx_gate_map, 1321 .gates_num = ARRAY_SIZE(stm32f469_gates), 1322 .pll_data = stm32f469_pll, 1323 .aux_clk = stm32f469_aux_clk, 1324 .aux_clk_num = ARRAY_SIZE(stm32f469_aux_clk), 1325 }; 1326 1327 static const struct stm32f4_clk_data stm32f746_clk_data = { 1328 .end_primary = END_PRIMARY_CLK_F7, 1329 .gates_data = stm32f746_gates, 1330 .gates_map = stm32f746_gate_map, 1331 .gates_num = ARRAY_SIZE(stm32f746_gates), 1332 .pll_data = stm32f469_pll, 1333 .aux_clk = stm32f746_aux_clk, 1334 .aux_clk_num = ARRAY_SIZE(stm32f746_aux_clk), 1335 }; 1336 1337 static const struct of_device_id stm32f4_of_match[] = { 1338 { 1339 .compatible = "st,stm32f42xx-rcc", 1340 .data = &stm32f429_clk_data 1341 }, 1342 { 1343 .compatible = "st,stm32f469-rcc", 1344 .data = &stm32f469_clk_data 1345 }, 1346 { 1347 .compatible = "st,stm32f746-rcc", 1348 .data = &stm32f746_clk_data 1349 }, 1350 {} 1351 }; 1352 1353 static struct clk_hw *stm32_register_aux_clk(const char *name, 1354 const char * const *parent_names, int num_parents, 1355 int offset_mux, u8 shift, u8 mask, 1356 int offset_gate, u8 bit_idx, 1357 unsigned long flags, spinlock_t *lock) 1358 { 1359 struct clk_hw *hw; 1360 struct clk_gate *gate = NULL; 1361 struct clk_mux *mux = NULL; 1362 struct clk_hw *mux_hw = NULL, *gate_hw = NULL; 1363 const struct clk_ops *mux_ops = NULL, *gate_ops = NULL; 1364 1365 if (offset_gate != NO_GATE) { 1366 gate = kzalloc(sizeof(*gate), GFP_KERNEL); 1367 if (!gate) { 1368 hw = ERR_PTR(-EINVAL); 1369 goto fail; 1370 } 1371 1372 gate->reg = base + offset_gate; 1373 gate->bit_idx = bit_idx; 1374 gate->flags = 0; 1375 gate->lock = lock; 1376 gate_hw = &gate->hw; 1377 gate_ops = &clk_gate_ops; 1378 } 1379 1380 if (offset_mux != NO_MUX) { 1381 mux = kzalloc(sizeof(*mux), GFP_KERNEL); 1382 if (!mux) { 1383 hw = ERR_PTR(-EINVAL); 1384 goto fail; 1385 } 1386 1387 mux->reg = base + offset_mux; 1388 mux->shift = shift; 1389 mux->mask = mask; 1390 mux->flags = 0; 1391 mux_hw = &mux->hw; 1392 mux_ops = &clk_mux_ops; 1393 } 1394 1395 if (mux_hw == NULL && gate_hw == NULL) { 1396 hw = ERR_PTR(-EINVAL); 1397 goto fail; 1398 } 1399 1400 hw = clk_hw_register_composite(NULL, name, parent_names, num_parents, 1401 mux_hw, mux_ops, 1402 NULL, NULL, 1403 gate_hw, gate_ops, 1404 flags); 1405 1406 fail: 1407 if (IS_ERR(hw)) { 1408 kfree(gate); 1409 kfree(mux); 1410 } 1411 1412 return hw; 1413 } 1414 1415 static void __init stm32f4_rcc_init(struct device_node *np) 1416 { 1417 const char *hse_clk, *i2s_in_clk; 1418 int n; 1419 const struct of_device_id *match; 1420 const struct stm32f4_clk_data *data; 1421 unsigned long pllcfgr; 1422 const char *pllsrc; 1423 unsigned long pllm; 1424 1425 base = of_iomap(np, 0); 1426 if (!base) { 1427 pr_err("%s: unable to map resource\n", np->name); 1428 return; 1429 } 1430 1431 pdrm = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); 1432 if (IS_ERR(pdrm)) { 1433 pdrm = NULL; 1434 pr_warn("%s: Unable to get syscfg\n", __func__); 1435 } 1436 1437 match = of_match_node(stm32f4_of_match, np); 1438 if (WARN_ON(!match)) 1439 return; 1440 1441 data = match->data; 1442 1443 stm32fx_end_primary_clk = data->end_primary; 1444 1445 clks = kmalloc_array(data->gates_num + stm32fx_end_primary_clk, 1446 sizeof(*clks), GFP_KERNEL); 1447 if (!clks) 1448 goto fail; 1449 1450 stm32f4_gate_map = data->gates_map; 1451 1452 hse_clk = of_clk_get_parent_name(np, 0); 1453 1454 i2s_in_clk = of_clk_get_parent_name(np, 1); 1455 1456 i2s_parents[1] = i2s_in_clk; 1457 sai_parents[2] = i2s_in_clk; 1458 1459 clks[CLK_HSI] = clk_hw_register_fixed_rate_with_accuracy(NULL, "hsi", 1460 NULL, 0, 16000000, 160000); 1461 1462 pllcfgr = readl(base + STM32F4_RCC_PLLCFGR); 1463 pllsrc = pllcfgr & BIT(22) ? hse_clk : "hsi"; 1464 pllm = pllcfgr & 0x3f; 1465 1466 clk_hw_register_fixed_factor(NULL, "vco_in", pllsrc, 1467 0, 1, pllm); 1468 1469 stm32f4_rcc_register_pll("vco_in", &data->pll_data[0], 1470 &stm32f4_clk_lock); 1471 1472 clks[PLL_VCO_I2S] = stm32f4_rcc_register_pll("vco_in", 1473 &data->pll_data[1], &stm32f4_clk_lock); 1474 1475 clks[PLL_VCO_SAI] = stm32f4_rcc_register_pll("vco_in", 1476 &data->pll_data[2], &stm32f4_clk_lock); 1477 1478 for (n = 0; n < MAX_POST_DIV; n++) { 1479 const struct stm32f4_pll_post_div_data *post_div; 1480 struct clk_hw *hw; 1481 1482 post_div = &post_div_data[n]; 1483 1484 hw = clk_register_pll_div(post_div->name, 1485 post_div->parent, 1486 post_div->flag, 1487 base + post_div->offset, 1488 post_div->shift, 1489 post_div->width, 1490 post_div->flag_div, 1491 post_div->div_table, 1492 clks[post_div->pll_num], 1493 &stm32f4_clk_lock); 1494 1495 if (post_div->idx != NO_IDX) 1496 clks[post_div->idx] = hw; 1497 } 1498 1499 sys_parents[1] = hse_clk; 1500 1501 clks[CLK_SYSCLK] = clk_hw_register_mux_table( 1502 NULL, "sys", sys_parents, ARRAY_SIZE(sys_parents), 0, 1503 base + STM32F4_RCC_CFGR, 0, 3, 0, NULL, &stm32f4_clk_lock); 1504 1505 clk_register_divider_table(NULL, "ahb_div", "sys", 1506 CLK_SET_RATE_PARENT, base + STM32F4_RCC_CFGR, 1507 4, 4, 0, ahb_div_table, &stm32f4_clk_lock); 1508 1509 clk_register_divider_table(NULL, "apb1_div", "ahb_div", 1510 CLK_SET_RATE_PARENT, base + STM32F4_RCC_CFGR, 1511 10, 3, 0, apb_div_table, &stm32f4_clk_lock); 1512 clk_register_apb_mul(NULL, "apb1_mul", "apb1_div", 1513 CLK_SET_RATE_PARENT, 12); 1514 1515 clk_register_divider_table(NULL, "apb2_div", "ahb_div", 1516 CLK_SET_RATE_PARENT, base + STM32F4_RCC_CFGR, 1517 13, 3, 0, apb_div_table, &stm32f4_clk_lock); 1518 clk_register_apb_mul(NULL, "apb2_mul", "apb2_div", 1519 CLK_SET_RATE_PARENT, 15); 1520 1521 clks[SYSTICK] = clk_hw_register_fixed_factor(NULL, "systick", "ahb_div", 1522 0, 1, 8); 1523 clks[FCLK] = clk_hw_register_fixed_factor(NULL, "fclk", "ahb_div", 1524 0, 1, 1); 1525 1526 for (n = 0; n < data->gates_num; n++) { 1527 const struct stm32f4_gate_data *gd; 1528 unsigned int secondary; 1529 int idx; 1530 1531 gd = &data->gates_data[n]; 1532 secondary = 8 * (gd->offset - STM32F4_RCC_AHB1ENR) + 1533 gd->bit_idx; 1534 idx = stm32f4_rcc_lookup_clk_idx(0, secondary); 1535 1536 if (idx < 0) 1537 goto fail; 1538 1539 clks[idx] = clk_hw_register_gate( 1540 NULL, gd->name, gd->parent_name, gd->flags, 1541 base + gd->offset, gd->bit_idx, 0, &stm32f4_clk_lock); 1542 1543 if (IS_ERR(clks[idx])) { 1544 pr_err("%pOF: Unable to register leaf clock %s\n", 1545 np, gd->name); 1546 goto fail; 1547 } 1548 } 1549 1550 clks[CLK_LSI] = clk_register_rgate(NULL, "lsi", "clk-lsi", 0, 1551 base + STM32F4_RCC_CSR, 0, 1, 0, &stm32f4_clk_lock); 1552 1553 if (IS_ERR(clks[CLK_LSI])) { 1554 pr_err("Unable to register lsi clock\n"); 1555 goto fail; 1556 } 1557 1558 clks[CLK_LSE] = clk_register_rgate(NULL, "lse", "clk-lse", 0, 1559 base + STM32F4_RCC_BDCR, 0, 1, 0, &stm32f4_clk_lock); 1560 1561 if (IS_ERR(clks[CLK_LSE])) { 1562 pr_err("Unable to register lse clock\n"); 1563 goto fail; 1564 } 1565 1566 clks[CLK_HSE_RTC] = clk_hw_register_divider(NULL, "hse-rtc", "clk-hse", 1567 0, base + STM32F4_RCC_CFGR, 16, 5, 0, 1568 &stm32f4_clk_lock); 1569 1570 if (IS_ERR(clks[CLK_HSE_RTC])) { 1571 pr_err("Unable to register hse-rtc clock\n"); 1572 goto fail; 1573 } 1574 1575 clks[CLK_RTC] = stm32_register_cclk(NULL, "rtc", rtc_parents, 4, 1576 base + STM32F4_RCC_BDCR, 15, 8, 0, &stm32f4_clk_lock); 1577 1578 if (IS_ERR(clks[CLK_RTC])) { 1579 pr_err("Unable to register rtc clock\n"); 1580 goto fail; 1581 } 1582 1583 for (n = 0; n < data->aux_clk_num; n++) { 1584 const struct stm32_aux_clk *aux_clk; 1585 struct clk_hw *hw; 1586 1587 aux_clk = &data->aux_clk[n]; 1588 1589 hw = stm32_register_aux_clk(aux_clk->name, 1590 aux_clk->parent_names, aux_clk->num_parents, 1591 aux_clk->offset_mux, aux_clk->shift, 1592 aux_clk->mask, aux_clk->offset_gate, 1593 aux_clk->bit_idx, aux_clk->flags, 1594 &stm32f4_clk_lock); 1595 1596 if (IS_ERR(hw)) { 1597 pr_warn("Unable to register %s clk\n", aux_clk->name); 1598 continue; 1599 } 1600 1601 if (aux_clk->idx != NO_IDX) 1602 clks[aux_clk->idx] = hw; 1603 } 1604 1605 if (of_device_is_compatible(np, "st,stm32f746-rcc")) 1606 1607 clk_hw_register_fixed_factor(NULL, "hsi_div488", "hsi", 0, 1608 1, 488); 1609 1610 of_clk_add_hw_provider(np, stm32f4_rcc_lookup_clk, NULL); 1611 return; 1612 fail: 1613 kfree(clks); 1614 iounmap(base); 1615 } 1616 CLK_OF_DECLARE_DRIVER(stm32f42xx_rcc, "st,stm32f42xx-rcc", stm32f4_rcc_init); 1617 CLK_OF_DECLARE_DRIVER(stm32f46xx_rcc, "st,stm32f469-rcc", stm32f4_rcc_init); 1618 CLK_OF_DECLARE_DRIVER(stm32f746_rcc, "st,stm32f746-rcc", stm32f4_rcc_init); 1619