1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/clk-provider.h> 3 #include <linux/mfd/syscon.h> 4 #include <linux/slab.h> 5 6 #include <dt-bindings/clock/at91.h> 7 8 #include "pmc.h" 9 10 static DEFINE_SPINLOCK(mck_lock); 11 12 static const struct clk_master_characteristics mck_characteristics = { 13 .output = { .min = 0, .max = 166000000 }, 14 .divisors = { 1, 2, 4, 3 }, 15 }; 16 17 static u8 plla_out[] = { 0 }; 18 19 static u16 plla_icpll[] = { 0 }; 20 21 static const struct clk_range plla_outputs[] = { 22 { .min = 400000000, .max = 1000000000 }, 23 }; 24 25 static const struct clk_pll_characteristics plla_characteristics = { 26 .input = { .min = 8000000, .max = 50000000 }, 27 .num_output = ARRAY_SIZE(plla_outputs), 28 .output = plla_outputs, 29 .icpll = plla_icpll, 30 .out = plla_out, 31 }; 32 33 static const struct clk_pcr_layout sama5d3_pcr_layout = { 34 .offset = 0x10c, 35 .cmd = BIT(12), 36 .pid_mask = GENMASK(6, 0), 37 .div_mask = GENMASK(17, 16), 38 }; 39 40 static const struct { 41 char *n; 42 char *p; 43 unsigned long flags; 44 u8 id; 45 } sama5d3_systemck[] = { 46 /* 47 * ddrck feeds DDR controller and is enabled by bootloader thus we need 48 * to keep it enabled in case there is no Linux consumer for it. 49 */ 50 { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, 51 { .n = "lcdck", .p = "masterck_div", .id = 3 }, 52 { .n = "smdck", .p = "smdclk", .id = 4 }, 53 { .n = "uhpck", .p = "usbck", .id = 6 }, 54 { .n = "udpck", .p = "usbck", .id = 7 }, 55 { .n = "pck0", .p = "prog0", .id = 8 }, 56 { .n = "pck1", .p = "prog1", .id = 9 }, 57 { .n = "pck2", .p = "prog2", .id = 10 }, 58 }; 59 60 static const struct { 61 char *n; 62 u8 id; 63 struct clk_range r; 64 unsigned long flags; 65 } sama5d3_periphck[] = { 66 { .n = "dbgu_clk", .id = 2, }, 67 { .n = "hsmc_clk", .id = 5, }, 68 { .n = "pioA_clk", .id = 6, }, 69 { .n = "pioB_clk", .id = 7, }, 70 { .n = "pioC_clk", .id = 8, }, 71 { .n = "pioD_clk", .id = 9, }, 72 { .n = "pioE_clk", .id = 10, }, 73 { .n = "usart0_clk", .id = 12, .r = { .min = 0, .max = 83000000 }, }, 74 { .n = "usart1_clk", .id = 13, .r = { .min = 0, .max = 83000000 }, }, 75 { .n = "usart2_clk", .id = 14, .r = { .min = 0, .max = 83000000 }, }, 76 { .n = "usart3_clk", .id = 15, .r = { .min = 0, .max = 83000000 }, }, 77 { .n = "uart0_clk", .id = 16, .r = { .min = 0, .max = 83000000 }, }, 78 { .n = "uart1_clk", .id = 17, .r = { .min = 0, .max = 83000000 }, }, 79 { .n = "twi0_clk", .id = 18, .r = { .min = 0, .max = 41500000 }, }, 80 { .n = "twi1_clk", .id = 19, .r = { .min = 0, .max = 41500000 }, }, 81 { .n = "twi2_clk", .id = 20, .r = { .min = 0, .max = 41500000 }, }, 82 { .n = "mci0_clk", .id = 21, }, 83 { .n = "mci1_clk", .id = 22, }, 84 { .n = "mci2_clk", .id = 23, }, 85 { .n = "spi0_clk", .id = 24, .r = { .min = 0, .max = 166000000 }, }, 86 { .n = "spi1_clk", .id = 25, .r = { .min = 0, .max = 166000000 }, }, 87 { .n = "tcb0_clk", .id = 26, .r = { .min = 0, .max = 166000000 }, }, 88 { .n = "tcb1_clk", .id = 27, .r = { .min = 0, .max = 166000000 }, }, 89 { .n = "pwm_clk", .id = 28, }, 90 { .n = "adc_clk", .id = 29, .r = { .min = 0, .max = 83000000 }, }, 91 { .n = "dma0_clk", .id = 30, }, 92 { .n = "dma1_clk", .id = 31, }, 93 { .n = "uhphs_clk", .id = 32, }, 94 { .n = "udphs_clk", .id = 33, }, 95 { .n = "macb0_clk", .id = 34, }, 96 { .n = "macb1_clk", .id = 35, }, 97 { .n = "lcdc_clk", .id = 36, }, 98 { .n = "isi_clk", .id = 37, }, 99 { .n = "ssc0_clk", .id = 38, .r = { .min = 0, .max = 83000000 }, }, 100 { .n = "ssc1_clk", .id = 39, .r = { .min = 0, .max = 83000000 }, }, 101 { .n = "can0_clk", .id = 40, .r = { .min = 0, .max = 83000000 }, }, 102 { .n = "can1_clk", .id = 41, .r = { .min = 0, .max = 83000000 }, }, 103 { .n = "sha_clk", .id = 42, }, 104 { .n = "aes_clk", .id = 43, }, 105 { .n = "tdes_clk", .id = 44, }, 106 { .n = "trng_clk", .id = 45, }, 107 { .n = "fuse_clk", .id = 48, }, 108 /* 109 * mpddr_clk feeds DDR controller and is enabled by bootloader thus we 110 * need to keep it enabled in case there is no Linux consumer for it. 111 */ 112 { .n = "mpddr_clk", .id = 49, .flags = CLK_IS_CRITICAL }, 113 }; 114 115 static void __init sama5d3_pmc_setup(struct device_node *np) 116 { 117 const char *slck_name, *mainxtal_name; 118 struct pmc_data *sama5d3_pmc; 119 const char *parent_names[5]; 120 struct regmap *regmap; 121 struct clk_hw *hw; 122 int i; 123 bool bypass; 124 125 i = of_property_match_string(np, "clock-names", "slow_clk"); 126 if (i < 0) 127 return; 128 129 slck_name = of_clk_get_parent_name(np, i); 130 131 i = of_property_match_string(np, "clock-names", "main_xtal"); 132 if (i < 0) 133 return; 134 mainxtal_name = of_clk_get_parent_name(np, i); 135 136 regmap = device_node_to_regmap(np); 137 if (IS_ERR(regmap)) 138 return; 139 140 sama5d3_pmc = pmc_data_allocate(PMC_PLLACK + 1, 141 nck(sama5d3_systemck), 142 nck(sama5d3_periphck), 0, 3); 143 if (!sama5d3_pmc) 144 return; 145 146 hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, 147 50000000); 148 if (IS_ERR(hw)) 149 goto err_free; 150 151 bypass = of_property_read_bool(np, "atmel,osc-bypass"); 152 153 hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, 154 bypass); 155 if (IS_ERR(hw)) 156 goto err_free; 157 158 parent_names[0] = "main_rc_osc"; 159 parent_names[1] = "main_osc"; 160 hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); 161 if (IS_ERR(hw)) 162 goto err_free; 163 164 hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, 165 &sama5d3_pll_layout, &plla_characteristics); 166 if (IS_ERR(hw)) 167 goto err_free; 168 169 hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack"); 170 if (IS_ERR(hw)) 171 goto err_free; 172 173 sama5d3_pmc->chws[PMC_PLLACK] = hw; 174 175 hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL); 176 if (IS_ERR(hw)) 177 goto err_free; 178 179 sama5d3_pmc->chws[PMC_UTMI] = hw; 180 181 parent_names[0] = slck_name; 182 parent_names[1] = "mainck"; 183 parent_names[2] = "plladivck"; 184 parent_names[3] = "utmick"; 185 hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, 186 parent_names, NULL, 187 &at91sam9x5_master_layout, 188 &mck_characteristics, &mck_lock); 189 if (IS_ERR(hw)) 190 goto err_free; 191 192 hw = at91_clk_register_master_div(regmap, "masterck_div", 193 "masterck_pres", NULL, 194 &at91sam9x5_master_layout, 195 &mck_characteristics, &mck_lock, 196 CLK_SET_RATE_GATE, 0); 197 if (IS_ERR(hw)) 198 goto err_free; 199 200 sama5d3_pmc->chws[PMC_MCK] = hw; 201 202 parent_names[0] = "plladivck"; 203 parent_names[1] = "utmick"; 204 hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2); 205 if (IS_ERR(hw)) 206 goto err_free; 207 208 hw = at91sam9x5_clk_register_smd(regmap, "smdclk", parent_names, 2); 209 if (IS_ERR(hw)) 210 goto err_free; 211 212 parent_names[0] = slck_name; 213 parent_names[1] = "mainck"; 214 parent_names[2] = "plladivck"; 215 parent_names[3] = "utmick"; 216 parent_names[4] = "masterck_div"; 217 for (i = 0; i < 3; i++) { 218 char name[6]; 219 220 snprintf(name, sizeof(name), "prog%d", i); 221 222 hw = at91_clk_register_programmable(regmap, name, 223 parent_names, NULL, 5, i, 224 &at91sam9x5_programmable_layout, 225 NULL); 226 if (IS_ERR(hw)) 227 goto err_free; 228 229 sama5d3_pmc->pchws[i] = hw; 230 } 231 232 for (i = 0; i < ARRAY_SIZE(sama5d3_systemck); i++) { 233 hw = at91_clk_register_system(regmap, sama5d3_systemck[i].n, 234 sama5d3_systemck[i].p, NULL, 235 sama5d3_systemck[i].id, 236 sama5d3_systemck[i].flags); 237 if (IS_ERR(hw)) 238 goto err_free; 239 240 sama5d3_pmc->shws[sama5d3_systemck[i].id] = hw; 241 } 242 243 for (i = 0; i < ARRAY_SIZE(sama5d3_periphck); i++) { 244 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, 245 &sama5d3_pcr_layout, 246 sama5d3_periphck[i].n, 247 "masterck_div", NULL, 248 sama5d3_periphck[i].id, 249 &sama5d3_periphck[i].r, 250 INT_MIN, 251 sama5d3_periphck[i].flags); 252 if (IS_ERR(hw)) 253 goto err_free; 254 255 sama5d3_pmc->phws[sama5d3_periphck[i].id] = hw; 256 } 257 258 of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d3_pmc); 259 260 return; 261 262 err_free: 263 kfree(sama5d3_pmc); 264 } 265 /* 266 * The TCB is used as the clocksource so its clock is needed early. This means 267 * this can't be a platform driver. 268 */ 269 CLK_OF_DECLARE(sama5d3_pmc, "atmel,sama5d3-pmc", sama5d3_pmc_setup); 270