drivers/clk/at91/at91sam9260.c

   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 struct sck {
  11         char *n;
  12         char *p;
  13         u8 id;
  14 };
  15
  16 struct pck {
  17         char *n;
  18         u8 id;
  19 };
  20
  21 struct at91sam926x_data {
  22         const struct clk_pll_layout *plla_layout;
  23         const struct clk_pll_characteristics *plla_characteristics;
  24         const struct clk_pll_layout *pllb_layout;
  25         const struct clk_pll_characteristics *pllb_characteristics;
  26         const struct clk_master_characteristics *mck_characteristics;
  27         const struct sck *sck;
  28         const struct pck *pck;
  29         u8 num_sck;
  30         u8 num_pck;
  31         u8 num_progck;
  32         bool has_slck;
  33 };
  34
  35 static DEFINE_SPINLOCK(at91sam9260_mck_lock);
  36
  37 static const struct clk_master_characteristics sam9260_mck_characteristics = {
  38         .output = { .min = 0, .max = 105000000 },
  39         .divisors = { 1, 2, 4, 0 },
  40 };
  41
  42 static u8 sam9260_plla_out[] = { 0, 2 };
  43
  44 static u16 sam9260_plla_icpll[] = { 1, 1 };
  45
  46 static const struct clk_range sam9260_plla_outputs[] = {
  47         { .min = 80000000, .max = 160000000 },
  48         { .min = 150000000, .max = 240000000 },
  49 };
  50
  51 static const struct clk_pll_characteristics sam9260_plla_characteristics = {
  52         .input = { .min = 1000000, .max = 32000000 },
  53         .num_output = ARRAY_SIZE(sam9260_plla_outputs),
  54         .output = sam9260_plla_outputs,
  55         .icpll = sam9260_plla_icpll,
  56         .out = sam9260_plla_out,
  57 };
  58
  59 static u8 sam9260_pllb_out[] = { 1 };
  60
  61 static u16 sam9260_pllb_icpll[] = { 1 };
  62
  63 static const struct clk_range sam9260_pllb_outputs[] = {
  64         { .min = 70000000, .max = 130000000 },
  65 };
  66
  67 static const struct clk_pll_characteristics sam9260_pllb_characteristics = {
  68         .input = { .min = 1000000, .max = 5000000 },
  69         .num_output = ARRAY_SIZE(sam9260_pllb_outputs),
  70         .output = sam9260_pllb_outputs,
  71         .icpll = sam9260_pllb_icpll,
  72         .out = sam9260_pllb_out,
  73 };
  74
  75 static const struct sck at91sam9260_systemck[] = {
  76         { .n = "uhpck", .p = "usbck",    .id = 6 },
  77         { .n = "udpck", .p = "usbck",    .id = 7 },
  78         { .n = "pck0",  .p = "prog0",    .id = 8 },
  79         { .n = "pck1",  .p = "prog1",    .id = 9 },
  80 };
  81
  82 static const struct pck at91sam9260_periphck[] = {
  83         { .n = "pioA_clk",   .id = 2 },
  84         { .n = "pioB_clk",   .id = 3 },
  85         { .n = "pioC_clk",   .id = 4 },
  86         { .n = "adc_clk",    .id = 5 },
  87         { .n = "usart0_clk", .id = 6 },
  88         { .n = "usart1_clk", .id = 7 },
  89         { .n = "usart2_clk", .id = 8 },
  90         { .n = "mci0_clk",   .id = 9 },
  91         { .n = "udc_clk",    .id = 10 },
  92         { .n = "twi0_clk",   .id = 11 },
  93         { .n = "spi0_clk",   .id = 12 },
  94         { .n = "spi1_clk",   .id = 13 },
  95         { .n = "ssc0_clk",   .id = 14 },
  96         { .n = "tc0_clk",    .id = 17 },
  97         { .n = "tc1_clk",    .id = 18 },
  98         { .n = "tc2_clk",    .id = 19 },
  99         { .n = "ohci_clk",   .id = 20 },
 100         { .n = "macb0_clk",  .id = 21 },
 101         { .n = "isi_clk",    .id = 22 },
 102         { .n = "usart3_clk", .id = 23 },
 103         { .n = "uart0_clk",  .id = 24 },
 104         { .n = "uart1_clk",  .id = 25 },
 105         { .n = "tc3_clk",    .id = 26 },
 106         { .n = "tc4_clk",    .id = 27 },
 107         { .n = "tc5_clk",    .id = 28 },
 108 };
 109
 110 static struct at91sam926x_data at91sam9260_data = {
 111         .plla_layout = &at91rm9200_pll_layout,
 112         .plla_characteristics = &sam9260_plla_characteristics,
 113         .pllb_layout = &at91rm9200_pll_layout,
 114         .pllb_characteristics = &sam9260_pllb_characteristics,
 115         .mck_characteristics = &sam9260_mck_characteristics,
 116         .sck = at91sam9260_systemck,
 117         .num_sck = ARRAY_SIZE(at91sam9260_systemck),
 118         .pck = at91sam9260_periphck,
 119         .num_pck = ARRAY_SIZE(at91sam9260_periphck),
 120         .num_progck = 2,
 121         .has_slck = true,
 122 };
 123
 124 static const struct clk_master_characteristics sam9g20_mck_characteristics = {
 125         .output = { .min = 0, .max = 133000000 },
 126         .divisors = { 1, 2, 4, 6 },
 127 };
 128
 129 static u8 sam9g20_plla_out[] = { 0, 1, 2, 3, 0, 1, 2, 3 };
 130
 131 static u16 sam9g20_plla_icpll[] = { 0, 0, 0, 0, 1, 1, 1, 1 };
 132
 133 static const struct clk_range sam9g20_plla_outputs[] = {
 134         { .min = 745000000, .max = 800000000 },
 135         { .min = 695000000, .max = 750000000 },
 136         { .min = 645000000, .max = 700000000 },
 137         { .min = 595000000, .max = 650000000 },
 138         { .min = 545000000, .max = 600000000 },
 139         { .min = 495000000, .max = 550000000 },
 140         { .min = 445000000, .max = 500000000 },
 141         { .min = 400000000, .max = 450000000 },
 142 };
 143
 144 static const struct clk_pll_characteristics sam9g20_plla_characteristics = {
 145         .input = { .min = 2000000, .max = 32000000 },
 146         .num_output = ARRAY_SIZE(sam9g20_plla_outputs),
 147         .output = sam9g20_plla_outputs,
 148         .icpll = sam9g20_plla_icpll,
 149         .out = sam9g20_plla_out,
 150 };
 151
 152 static u8 sam9g20_pllb_out[] = { 0 };
 153
 154 static u16 sam9g20_pllb_icpll[] = { 0 };
 155
 156 static const struct clk_range sam9g20_pllb_outputs[] = {
 157         { .min = 30000000, .max = 100000000 },
 158 };
 159
 160 static const struct clk_pll_characteristics sam9g20_pllb_characteristics = {
 161         .input = { .min = 2000000, .max = 32000000 },
 162         .num_output = ARRAY_SIZE(sam9g20_pllb_outputs),
 163         .output = sam9g20_pllb_outputs,
 164         .icpll = sam9g20_pllb_icpll,
 165         .out = sam9g20_pllb_out,
 166 };
 167
 168 static struct at91sam926x_data at91sam9g20_data = {
 169         .plla_layout = &at91sam9g45_pll_layout,
 170         .plla_characteristics = &sam9g20_plla_characteristics,
 171         .pllb_layout = &at91sam9g20_pllb_layout,
 172         .pllb_characteristics = &sam9g20_pllb_characteristics,
 173         .mck_characteristics = &sam9g20_mck_characteristics,
 174         .sck = at91sam9260_systemck,
 175         .num_sck = ARRAY_SIZE(at91sam9260_systemck),
 176         .pck = at91sam9260_periphck,
 177         .num_pck = ARRAY_SIZE(at91sam9260_periphck),
 178         .num_progck = 2,
 179         .has_slck = true,
 180 };
 181
 182 static const struct clk_master_characteristics sam9261_mck_characteristics = {
 183         .output = { .min = 0, .max = 94000000 },
 184         .divisors = { 1, 2, 4, 0 },
 185 };
 186
 187 static const struct clk_range sam9261_plla_outputs[] = {
 188         { .min = 80000000, .max = 200000000 },
 189         { .min = 190000000, .max = 240000000 },
 190 };
 191
 192 static const struct clk_pll_characteristics sam9261_plla_characteristics = {
 193         .input = { .min = 1000000, .max = 32000000 },
 194         .num_output = ARRAY_SIZE(sam9261_plla_outputs),
 195         .output = sam9261_plla_outputs,
 196         .icpll = sam9260_plla_icpll,
 197         .out = sam9260_plla_out,
 198 };
 199
 200 static u8 sam9261_pllb_out[] = { 1 };
 201
 202 static u16 sam9261_pllb_icpll[] = { 1 };
 203
 204 static const struct clk_range sam9261_pllb_outputs[] = {
 205         { .min = 70000000, .max = 130000000 },
 206 };
 207
 208 static const struct clk_pll_characteristics sam9261_pllb_characteristics = {
 209         .input = { .min = 1000000, .max = 5000000 },
 210         .num_output = ARRAY_SIZE(sam9261_pllb_outputs),
 211         .output = sam9261_pllb_outputs,
 212         .icpll = sam9261_pllb_icpll,
 213         .out = sam9261_pllb_out,
 214 };
 215
 216 static const struct sck at91sam9261_systemck[] = {
 217         { .n = "uhpck", .p = "usbck",    .id = 6 },
 218         { .n = "udpck", .p = "usbck",    .id = 7 },
 219         { .n = "pck0",  .p = "prog0",    .id = 8 },
 220         { .n = "pck1",  .p = "prog1",    .id = 9 },
 221         { .n = "pck2",  .p = "prog2",    .id = 10 },
 222         { .n = "pck3",  .p = "prog3",    .id = 11 },
 223         { .n = "hclk0", .p = "masterck_div", .id = 16 },
 224         { .n = "hclk1", .p = "masterck_div", .id = 17 },
 225 };
 226
 227 static const struct pck at91sam9261_periphck[] = {
 228         { .n = "pioA_clk",   .id = 2, },
 229         { .n = "pioB_clk",   .id = 3, },
 230         { .n = "pioC_clk",   .id = 4, },
 231         { .n = "usart0_clk", .id = 6, },
 232         { .n = "usart1_clk", .id = 7, },
 233         { .n = "usart2_clk", .id = 8, },
 234         { .n = "mci0_clk",   .id = 9, },
 235         { .n = "udc_clk",    .id = 10, },
 236         { .n = "twi0_clk",   .id = 11, },
 237         { .n = "spi0_clk",   .id = 12, },
 238         { .n = "spi1_clk",   .id = 13, },
 239         { .n = "ssc0_clk",   .id = 14, },
 240         { .n = "ssc1_clk",   .id = 15, },
 241         { .n = "ssc2_clk",   .id = 16, },
 242         { .n = "tc0_clk",    .id = 17, },
 243         { .n = "tc1_clk",    .id = 18, },
 244         { .n = "tc2_clk",    .id = 19, },
 245         { .n = "ohci_clk",   .id = 20, },
 246         { .n = "lcd_clk",    .id = 21, },
 247 };
 248
 249 static struct at91sam926x_data at91sam9261_data = {
 250         .plla_layout = &at91rm9200_pll_layout,
 251         .plla_characteristics = &sam9261_plla_characteristics,
 252         .pllb_layout = &at91rm9200_pll_layout,
 253         .pllb_characteristics = &sam9261_pllb_characteristics,
 254         .mck_characteristics = &sam9261_mck_characteristics,
 255         .sck = at91sam9261_systemck,
 256         .num_sck = ARRAY_SIZE(at91sam9261_systemck),
 257         .pck = at91sam9261_periphck,
 258         .num_pck = ARRAY_SIZE(at91sam9261_periphck),
 259         .num_progck = 4,
 260 };
 261
 262 static const struct clk_master_characteristics sam9263_mck_characteristics = {
 263         .output = { .min = 0, .max = 120000000 },
 264         .divisors = { 1, 2, 4, 0 },
 265 };
 266
 267 static const struct clk_range sam9263_pll_outputs[] = {
 268         { .min = 80000000, .max = 200000000 },
 269         { .min = 190000000, .max = 240000000 },
 270 };
 271
 272 static const struct clk_pll_characteristics sam9263_pll_characteristics = {
 273         .input = { .min = 1000000, .max = 32000000 },
 274         .num_output = ARRAY_SIZE(sam9263_pll_outputs),
 275         .output = sam9263_pll_outputs,
 276         .icpll = sam9260_plla_icpll,
 277         .out = sam9260_plla_out,
 278 };
 279
 280 static const struct sck at91sam9263_systemck[] = {
 281         { .n = "uhpck", .p = "usbck",    .id = 6 },
 282         { .n = "udpck", .p = "usbck",    .id = 7 },
 283         { .n = "pck0",  .p = "prog0",    .id = 8 },
 284         { .n = "pck1",  .p = "prog1",    .id = 9 },
 285         { .n = "pck2",  .p = "prog2",    .id = 10 },
 286         { .n = "pck3",  .p = "prog3",    .id = 11 },
 287 };
 288
 289 static const struct pck at91sam9263_periphck[] = {
 290         { .n = "pioA_clk",   .id = 2, },
 291         { .n = "pioB_clk",   .id = 3, },
 292         { .n = "pioCDE_clk", .id = 4, },
 293         { .n = "usart0_clk", .id = 7, },
 294         { .n = "usart1_clk", .id = 8, },
 295         { .n = "usart2_clk", .id = 9, },
 296         { .n = "mci0_clk",   .id = 10, },
 297         { .n = "mci1_clk",   .id = 11, },
 298         { .n = "can_clk",    .id = 12, },
 299         { .n = "twi0_clk",   .id = 13, },
 300         { .n = "spi0_clk",   .id = 14, },
 301         { .n = "spi1_clk",   .id = 15, },
 302         { .n = "ssc0_clk",   .id = 16, },
 303         { .n = "ssc1_clk",   .id = 17, },
 304         { .n = "ac97_clk",   .id = 18, },
 305         { .n = "tcb_clk",    .id = 19, },
 306         { .n = "pwm_clk",    .id = 20, },
 307         { .n = "macb0_clk",  .id = 21, },
 308         { .n = "g2de_clk",   .id = 23, },
 309         { .n = "udc_clk",    .id = 24, },
 310         { .n = "isi_clk",    .id = 25, },
 311         { .n = "lcd_clk",    .id = 26, },
 312         { .n = "dma_clk",    .id = 27, },
 313         { .n = "ohci_clk",   .id = 29, },
 314 };
 315
 316 static struct at91sam926x_data at91sam9263_data = {
 317         .plla_layout = &at91rm9200_pll_layout,
 318         .plla_characteristics = &sam9263_pll_characteristics,
 319         .pllb_layout = &at91rm9200_pll_layout,
 320         .pllb_characteristics = &sam9263_pll_characteristics,
 321         .mck_characteristics = &sam9263_mck_characteristics,
 322         .sck = at91sam9263_systemck,
 323         .num_sck = ARRAY_SIZE(at91sam9263_systemck),
 324         .pck = at91sam9263_periphck,
 325         .num_pck = ARRAY_SIZE(at91sam9263_periphck),
 326         .num_progck = 4,
 327 };
 328
 329 static void __init at91sam926x_pmc_setup(struct device_node *np,
 330                                          struct at91sam926x_data *data)
 331 {
 332         const char *slowxtal_name, *mainxtal_name;
 333         struct pmc_data *at91sam9260_pmc;
 334         u32 usb_div[] = { 1, 2, 4, 0 };
 335         const char *parent_names[6];
 336         const char *slck_name;
 337         struct regmap *regmap;
 338         struct clk_hw *hw;
 339         int i;
 340         bool bypass;
 341
 342         i = of_property_match_string(np, "clock-names", "slow_xtal");
 343         if (i < 0)
 344                 return;
 345
 346         slowxtal_name = of_clk_get_parent_name(np, i);
 347
 348         i = of_property_match_string(np, "clock-names", "main_xtal");
 349         if (i < 0)
 350                 return;
 351         mainxtal_name = of_clk_get_parent_name(np, i);
 352
 353         regmap = device_node_to_regmap(np);
 354         if (IS_ERR(regmap))
 355                 return;
 356
 357         at91sam9260_pmc = pmc_data_allocate(PMC_PLLBCK + 1,
 358                                             ndck(data->sck, data->num_sck),
 359                                             ndck(data->pck, data->num_pck),
 360                                             0, data->num_progck);
 361         if (!at91sam9260_pmc)
 362                 return;
 363
 364         bypass = of_property_read_bool(np, "atmel,osc-bypass");
 365
 366         hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
 367                                         bypass);
 368         if (IS_ERR(hw))
 369                 goto err_free;
 370
 371         hw = at91_clk_register_rm9200_main(regmap, "mainck", "main_osc");
 372         if (IS_ERR(hw))
 373                 goto err_free;
 374
 375         at91sam9260_pmc->chws[PMC_MAIN] = hw;
 376
 377         if (data->has_slck) {
 378                 hw = clk_hw_register_fixed_rate_with_accuracy(NULL,
 379                                                               "slow_rc_osc",
 380                                                               NULL, 0, 32768,
 381                                                               50000000);
 382                 if (IS_ERR(hw))
 383                         goto err_free;
 384
 385                 parent_names[0] = "slow_rc_osc";
 386                 parent_names[1] = "slow_xtal";
 387                 hw = at91_clk_register_sam9260_slow(regmap, "slck",
 388                                                     parent_names, 2);
 389                 if (IS_ERR(hw))
 390                         goto err_free;
 391
 392                 at91sam9260_pmc->chws[PMC_SLOW] = hw;
 393                 slck_name = "slck";
 394         } else {
 395                 slck_name = slowxtal_name;
 396         }
 397
 398         hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0,
 399                                    data->plla_layout,
 400                                    data->plla_characteristics);
 401         if (IS_ERR(hw))
 402                 goto err_free;
 403
 404         at91sam9260_pmc->chws[PMC_PLLACK] = hw;
 405
 406         hw = at91_clk_register_pll(regmap, "pllbck", "mainck", 1,
 407                                    data->pllb_layout,
 408                                    data->pllb_characteristics);
 409         if (IS_ERR(hw))
 410                 goto err_free;
 411
 412         at91sam9260_pmc->chws[PMC_PLLBCK] = hw;
 413
 414         parent_names[0] = slck_name;
 415         parent_names[1] = "mainck";
 416         parent_names[2] = "pllack";
 417         parent_names[3] = "pllbck";
 418         hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
 419                                            parent_names,
 420                                            &at91rm9200_master_layout,
 421                                            data->mck_characteristics,
 422                                            &at91sam9260_mck_lock,
 423                                            CLK_SET_RATE_GATE, INT_MIN);
 424         if (IS_ERR(hw))
 425                 goto err_free;
 426
 427         hw = at91_clk_register_master_div(regmap, "masterck_div",
 428                                           "masterck_pres",
 429                                           &at91rm9200_master_layout,
 430                                           data->mck_characteristics,
 431                                           &at91sam9260_mck_lock,
 432                                           CLK_SET_RATE_GATE);
 433         if (IS_ERR(hw))
 434                 goto err_free;
 435
 436         at91sam9260_pmc->chws[PMC_MCK] = hw;
 437
 438         hw = at91rm9200_clk_register_usb(regmap, "usbck", "pllbck", usb_div);
 439         if (IS_ERR(hw))
 440                 goto err_free;
 441
 442         parent_names[0] = slck_name;
 443         parent_names[1] = "mainck";
 444         parent_names[2] = "pllack";
 445         parent_names[3] = "pllbck";
 446         for (i = 0; i < data->num_progck; i++) {
 447                 char name[6];
 448
 449                 snprintf(name, sizeof(name), "prog%d", i);
 450
 451                 hw = at91_clk_register_programmable(regmap, name,
 452                                                     parent_names, 4, i,
 453                                                     &at91rm9200_programmable_layout,
 454                                                     NULL);
 455                 if (IS_ERR(hw))
 456                         goto err_free;
 457
 458                 at91sam9260_pmc->pchws[i] = hw;
 459         }
 460
 461         for (i = 0; i < data->num_sck; i++) {
 462                 hw = at91_clk_register_system(regmap, data->sck[i].n,
 463                                               data->sck[i].p,
 464                                               data->sck[i].id);
 465                 if (IS_ERR(hw))
 466                         goto err_free;
 467
 468                 at91sam9260_pmc->shws[data->sck[i].id] = hw;
 469         }
 470
 471         for (i = 0; i < data->num_pck; i++) {
 472                 hw = at91_clk_register_peripheral(regmap,
 473                                                   data->pck[i].n,
 474                                                   "masterck_div",
 475                                                   data->pck[i].id);
 476                 if (IS_ERR(hw))
 477                         goto err_free;
 478
 479                 at91sam9260_pmc->phws[data->pck[i].id] = hw;
 480         }
 481
 482         of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9260_pmc);
 483
 484         return;
 485
 486 err_free:
 487         kfree(at91sam9260_pmc);
 488 }
 489
 490 static void __init at91sam9260_pmc_setup(struct device_node *np)
 491 {
 492         at91sam926x_pmc_setup(np, &at91sam9260_data);
 493 }
 494 CLK_OF_DECLARE_DRIVER(at91sam9260_pmc, "atmel,at91sam9260-pmc",
 495                       at91sam9260_pmc_setup);
 496
 497 static void __init at91sam9261_pmc_setup(struct device_node *np)
 498 {
 499         at91sam926x_pmc_setup(np, &at91sam9261_data);
 500 }
 501 CLK_OF_DECLARE_DRIVER(at91sam9261_pmc, "atmel,at91sam9261-pmc",
 502                       at91sam9261_pmc_setup);
 503
 504 static void __init at91sam9263_pmc_setup(struct device_node *np)
 505 {
 506         at91sam926x_pmc_setup(np, &at91sam9263_data);
 507 }
 508 CLK_OF_DECLARE_DRIVER(at91sam9263_pmc, "atmel,at91sam9263-pmc",
 509                       at91sam9263_pmc_setup);
 510
 511 static void __init at91sam9g20_pmc_setup(struct device_node *np)
 512 {
 513         at91sam926x_pmc_setup(np, &at91sam9g20_data);
 514 }
 515 CLK_OF_DECLARE_DRIVER(at91sam9g20_pmc, "atmel,at91sam9g20-pmc",
 516                       at91sam9g20_pmc_setup);