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 = 124000000, .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 = 600000000, .max = 1200000000 }, 23 }; 24 25 static const struct clk_pll_characteristics plla_characteristics = { 26 .input = { .min = 12000000, .max = 24000000 }, 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 sama5d2_pcr_layout = { 34 .offset = 0x10c, 35 .cmd = BIT(12), 36 .gckcss_mask = GENMASK(10, 8), 37 .pid_mask = GENMASK(6, 0), 38 }; 39 40 static const struct { 41 char *n; 42 char *p; 43 unsigned long flags; 44 u8 id; 45 } sama5d2_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 = "uhpck", .p = "usbck", .id = 6 }, 53 { .n = "udpck", .p = "usbck", .id = 7 }, 54 { .n = "pck0", .p = "prog0", .id = 8 }, 55 { .n = "pck1", .p = "prog1", .id = 9 }, 56 { .n = "pck2", .p = "prog2", .id = 10 }, 57 { .n = "iscck", .p = "masterck_div", .id = 18 }, 58 }; 59 60 static const struct { 61 char *n; 62 u8 id; 63 struct clk_range r; 64 } sama5d2_periph32ck[] = { 65 { .n = "macb0_clk", .id = 5, .r = { .min = 0, .max = 83000000 }, }, 66 { .n = "tdes_clk", .id = 11, .r = { .min = 0, .max = 83000000 }, }, 67 { .n = "matrix1_clk", .id = 14, }, 68 { .n = "hsmc_clk", .id = 17, }, 69 { .n = "pioA_clk", .id = 18, .r = { .min = 0, .max = 83000000 }, }, 70 { .n = "flx0_clk", .id = 19, .r = { .min = 0, .max = 83000000 }, }, 71 { .n = "flx1_clk", .id = 20, .r = { .min = 0, .max = 83000000 }, }, 72 { .n = "flx2_clk", .id = 21, .r = { .min = 0, .max = 83000000 }, }, 73 { .n = "flx3_clk", .id = 22, .r = { .min = 0, .max = 83000000 }, }, 74 { .n = "flx4_clk", .id = 23, .r = { .min = 0, .max = 83000000 }, }, 75 { .n = "uart0_clk", .id = 24, .r = { .min = 0, .max = 83000000 }, }, 76 { .n = "uart1_clk", .id = 25, .r = { .min = 0, .max = 83000000 }, }, 77 { .n = "uart2_clk", .id = 26, .r = { .min = 0, .max = 83000000 }, }, 78 { .n = "uart3_clk", .id = 27, .r = { .min = 0, .max = 83000000 }, }, 79 { .n = "uart4_clk", .id = 28, .r = { .min = 0, .max = 83000000 }, }, 80 { .n = "twi0_clk", .id = 29, .r = { .min = 0, .max = 83000000 }, }, 81 { .n = "twi1_clk", .id = 30, .r = { .min = 0, .max = 83000000 }, }, 82 { .n = "spi0_clk", .id = 33, .r = { .min = 0, .max = 83000000 }, }, 83 { .n = "spi1_clk", .id = 34, .r = { .min = 0, .max = 83000000 }, }, 84 { .n = "tcb0_clk", .id = 35, .r = { .min = 0, .max = 83000000 }, }, 85 { .n = "tcb1_clk", .id = 36, .r = { .min = 0, .max = 83000000 }, }, 86 { .n = "pwm_clk", .id = 38, .r = { .min = 0, .max = 83000000 }, }, 87 { .n = "adc_clk", .id = 40, .r = { .min = 0, .max = 83000000 }, }, 88 { .n = "uhphs_clk", .id = 41, .r = { .min = 0, .max = 83000000 }, }, 89 { .n = "udphs_clk", .id = 42, .r = { .min = 0, .max = 83000000 }, }, 90 { .n = "ssc0_clk", .id = 43, .r = { .min = 0, .max = 83000000 }, }, 91 { .n = "ssc1_clk", .id = 44, .r = { .min = 0, .max = 83000000 }, }, 92 { .n = "trng_clk", .id = 47, .r = { .min = 0, .max = 83000000 }, }, 93 { .n = "pdmic_clk", .id = 48, .r = { .min = 0, .max = 83000000 }, }, 94 { .n = "securam_clk", .id = 51, }, 95 { .n = "i2s0_clk", .id = 54, .r = { .min = 0, .max = 83000000 }, }, 96 { .n = "i2s1_clk", .id = 55, .r = { .min = 0, .max = 83000000 }, }, 97 { .n = "can0_clk", .id = 56, .r = { .min = 0, .max = 83000000 }, }, 98 { .n = "can1_clk", .id = 57, .r = { .min = 0, .max = 83000000 }, }, 99 { .n = "ptc_clk", .id = 58, .r = { .min = 0, .max = 83000000 }, }, 100 { .n = "classd_clk", .id = 59, .r = { .min = 0, .max = 83000000 }, }, 101 }; 102 103 static const struct { 104 char *n; 105 unsigned long flags; 106 u8 id; 107 } sama5d2_periphck[] = { 108 { .n = "dma0_clk", .id = 6, }, 109 { .n = "dma1_clk", .id = 7, }, 110 { .n = "aes_clk", .id = 9, }, 111 { .n = "aesb_clk", .id = 10, }, 112 { .n = "sha_clk", .id = 12, }, 113 /* 114 * mpddr_clk feeds DDR controller and is enabled by bootloader thus we 115 * need to keep it enabled in case there is no Linux consumer for it. 116 */ 117 { .n = "mpddr_clk", .id = 13, .flags = CLK_IS_CRITICAL }, 118 { .n = "matrix0_clk", .id = 15, }, 119 { .n = "sdmmc0_hclk", .id = 31, }, 120 { .n = "sdmmc1_hclk", .id = 32, }, 121 { .n = "lcdc_clk", .id = 45, }, 122 { .n = "isc_clk", .id = 46, }, 123 { .n = "qspi0_clk", .id = 52, }, 124 { .n = "qspi1_clk", .id = 53, }, 125 }; 126 127 static const struct { 128 char *n; 129 u8 id; 130 struct clk_range r; 131 int chg_pid; 132 } sama5d2_gck[] = { 133 { .n = "flx0_gclk", .id = 19, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 134 { .n = "flx1_gclk", .id = 20, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 135 { .n = "flx2_gclk", .id = 21, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 136 { .n = "flx3_gclk", .id = 22, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 137 { .n = "flx4_gclk", .id = 23, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 138 { .n = "uart0_gclk", .id = 24, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 139 { .n = "uart1_gclk", .id = 25, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 140 { .n = "uart2_gclk", .id = 26, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 141 { .n = "uart3_gclk", .id = 27, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 142 { .n = "uart4_gclk", .id = 28, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, 143 { .n = "sdmmc0_gclk", .id = 31, .chg_pid = INT_MIN, }, 144 { .n = "sdmmc1_gclk", .id = 32, .chg_pid = INT_MIN, }, 145 { .n = "tcb0_gclk", .id = 35, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, }, 146 { .n = "tcb1_gclk", .id = 36, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, }, 147 { .n = "pwm_gclk", .id = 38, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, }, 148 { .n = "isc_gclk", .id = 46, .chg_pid = INT_MIN, }, 149 { .n = "pdmic_gclk", .id = 48, .chg_pid = INT_MIN, }, 150 { .n = "i2s0_gclk", .id = 54, .chg_pid = 5, }, 151 { .n = "i2s1_gclk", .id = 55, .chg_pid = 5, }, 152 { .n = "can0_gclk", .id = 56, .chg_pid = INT_MIN, .r = { .min = 0, .max = 80000000 }, }, 153 { .n = "can1_gclk", .id = 57, .chg_pid = INT_MIN, .r = { .min = 0, .max = 80000000 }, }, 154 { .n = "classd_gclk", .id = 59, .chg_pid = 5, .r = { .min = 0, .max = 100000000 }, }, 155 }; 156 157 static const struct clk_programmable_layout sama5d2_programmable_layout = { 158 .pres_mask = 0xff, 159 .pres_shift = 4, 160 .css_mask = 0x7, 161 .have_slck_mck = 0, 162 .is_pres_direct = 1, 163 }; 164 165 static void __init sama5d2_pmc_setup(struct device_node *np) 166 { 167 struct clk_range range = CLK_RANGE(0, 0); 168 const char *slck_name, *mainxtal_name; 169 struct pmc_data *sama5d2_pmc; 170 const char *parent_names[6]; 171 struct regmap *regmap, *regmap_sfr; 172 struct clk_hw *hw; 173 int i; 174 bool bypass; 175 176 i = of_property_match_string(np, "clock-names", "slow_clk"); 177 if (i < 0) 178 return; 179 180 slck_name = of_clk_get_parent_name(np, i); 181 182 i = of_property_match_string(np, "clock-names", "main_xtal"); 183 if (i < 0) 184 return; 185 mainxtal_name = of_clk_get_parent_name(np, i); 186 187 regmap = device_node_to_regmap(np); 188 if (IS_ERR(regmap)) 189 return; 190 191 sama5d2_pmc = pmc_data_allocate(PMC_AUDIOPINCK + 1, 192 nck(sama5d2_systemck), 193 nck(sama5d2_periph32ck), 194 nck(sama5d2_gck), 3); 195 if (!sama5d2_pmc) 196 return; 197 198 hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, 199 100000000); 200 if (IS_ERR(hw)) 201 goto err_free; 202 203 bypass = of_property_read_bool(np, "atmel,osc-bypass"); 204 205 hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, 206 bypass); 207 if (IS_ERR(hw)) 208 goto err_free; 209 210 parent_names[0] = "main_rc_osc"; 211 parent_names[1] = "main_osc"; 212 hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); 213 if (IS_ERR(hw)) 214 goto err_free; 215 216 sama5d2_pmc->chws[PMC_MAIN] = hw; 217 218 hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, 219 &sama5d3_pll_layout, &plla_characteristics); 220 if (IS_ERR(hw)) 221 goto err_free; 222 223 hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack"); 224 if (IS_ERR(hw)) 225 goto err_free; 226 227 sama5d2_pmc->chws[PMC_PLLACK] = hw; 228 229 hw = at91_clk_register_audio_pll_frac(regmap, "audiopll_fracck", 230 "mainck"); 231 if (IS_ERR(hw)) 232 goto err_free; 233 234 hw = at91_clk_register_audio_pll_pad(regmap, "audiopll_padck", 235 "audiopll_fracck"); 236 if (IS_ERR(hw)) 237 goto err_free; 238 239 sama5d2_pmc->chws[PMC_AUDIOPINCK] = hw; 240 241 hw = at91_clk_register_audio_pll_pmc(regmap, "audiopll_pmcck", 242 "audiopll_fracck"); 243 if (IS_ERR(hw)) 244 goto err_free; 245 246 sama5d2_pmc->chws[PMC_AUDIOPLLCK] = hw; 247 248 regmap_sfr = syscon_regmap_lookup_by_compatible("atmel,sama5d2-sfr"); 249 if (IS_ERR(regmap_sfr)) 250 regmap_sfr = NULL; 251 252 hw = at91_clk_register_utmi(regmap, regmap_sfr, "utmick", "mainck", NULL); 253 if (IS_ERR(hw)) 254 goto err_free; 255 256 sama5d2_pmc->chws[PMC_UTMI] = hw; 257 258 parent_names[0] = slck_name; 259 parent_names[1] = "mainck"; 260 parent_names[2] = "plladivck"; 261 parent_names[3] = "utmick"; 262 hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, 263 parent_names, NULL, 264 &at91sam9x5_master_layout, 265 &mck_characteristics, &mck_lock); 266 if (IS_ERR(hw)) 267 goto err_free; 268 269 hw = at91_clk_register_master_div(regmap, "masterck_div", 270 "masterck_pres", NULL, 271 &at91sam9x5_master_layout, 272 &mck_characteristics, &mck_lock, 273 CLK_SET_RATE_GATE, 0); 274 if (IS_ERR(hw)) 275 goto err_free; 276 277 sama5d2_pmc->chws[PMC_MCK] = hw; 278 279 hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div"); 280 if (IS_ERR(hw)) 281 goto err_free; 282 283 sama5d2_pmc->chws[PMC_MCK2] = hw; 284 285 parent_names[0] = "plladivck"; 286 parent_names[1] = "utmick"; 287 hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2); 288 if (IS_ERR(hw)) 289 goto err_free; 290 291 parent_names[0] = slck_name; 292 parent_names[1] = "mainck"; 293 parent_names[2] = "plladivck"; 294 parent_names[3] = "utmick"; 295 parent_names[4] = "masterck_div"; 296 parent_names[5] = "audiopll_pmcck"; 297 for (i = 0; i < 3; i++) { 298 char name[6]; 299 300 snprintf(name, sizeof(name), "prog%d", i); 301 302 hw = at91_clk_register_programmable(regmap, name, 303 parent_names, NULL, 6, i, 304 &sama5d2_programmable_layout, 305 NULL); 306 if (IS_ERR(hw)) 307 goto err_free; 308 309 sama5d2_pmc->pchws[i] = hw; 310 } 311 312 for (i = 0; i < ARRAY_SIZE(sama5d2_systemck); i++) { 313 hw = at91_clk_register_system(regmap, sama5d2_systemck[i].n, 314 sama5d2_systemck[i].p, NULL, 315 sama5d2_systemck[i].id, 316 sama5d2_systemck[i].flags); 317 if (IS_ERR(hw)) 318 goto err_free; 319 320 sama5d2_pmc->shws[sama5d2_systemck[i].id] = hw; 321 } 322 323 for (i = 0; i < ARRAY_SIZE(sama5d2_periphck); i++) { 324 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, 325 &sama5d2_pcr_layout, 326 sama5d2_periphck[i].n, 327 "masterck_div", NULL, 328 sama5d2_periphck[i].id, 329 &range, INT_MIN, 330 sama5d2_periphck[i].flags); 331 if (IS_ERR(hw)) 332 goto err_free; 333 334 sama5d2_pmc->phws[sama5d2_periphck[i].id] = hw; 335 } 336 337 for (i = 0; i < ARRAY_SIZE(sama5d2_periph32ck); i++) { 338 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, 339 &sama5d2_pcr_layout, 340 sama5d2_periph32ck[i].n, 341 "h32mxck", NULL, 342 sama5d2_periph32ck[i].id, 343 &sama5d2_periph32ck[i].r, 344 INT_MIN, 0); 345 if (IS_ERR(hw)) 346 goto err_free; 347 348 sama5d2_pmc->phws[sama5d2_periph32ck[i].id] = hw; 349 } 350 351 parent_names[0] = slck_name; 352 parent_names[1] = "mainck"; 353 parent_names[2] = "plladivck"; 354 parent_names[3] = "utmick"; 355 parent_names[4] = "masterck_div"; 356 parent_names[5] = "audiopll_pmcck"; 357 for (i = 0; i < ARRAY_SIZE(sama5d2_gck); i++) { 358 hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, 359 &sama5d2_pcr_layout, 360 sama5d2_gck[i].n, 361 parent_names, NULL, NULL, 6, 362 sama5d2_gck[i].id, 363 &sama5d2_gck[i].r, 364 sama5d2_gck[i].chg_pid); 365 if (IS_ERR(hw)) 366 goto err_free; 367 368 sama5d2_pmc->ghws[sama5d2_gck[i].id] = hw; 369 } 370 371 if (regmap_sfr) { 372 parent_names[0] = "i2s0_clk"; 373 parent_names[1] = "i2s0_gclk"; 374 hw = at91_clk_i2s_mux_register(regmap_sfr, "i2s0_muxclk", 375 parent_names, 2, 0); 376 if (IS_ERR(hw)) 377 goto err_free; 378 379 sama5d2_pmc->chws[PMC_I2S0_MUX] = hw; 380 381 parent_names[0] = "i2s1_clk"; 382 parent_names[1] = "i2s1_gclk"; 383 hw = at91_clk_i2s_mux_register(regmap_sfr, "i2s1_muxclk", 384 parent_names, 2, 1); 385 if (IS_ERR(hw)) 386 goto err_free; 387 388 sama5d2_pmc->chws[PMC_I2S1_MUX] = hw; 389 } 390 391 of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d2_pmc); 392 393 return; 394 395 err_free: 396 kfree(sama5d2_pmc); 397 } 398 399 CLK_OF_DECLARE(sama5d2_pmc, "atmel,sama5d2-pmc", sama5d2_pmc_setup); 400