drivers/clk/at91/sam9x60.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 static DEFINE_SPINLOCK(pmc_pll_lock);
  11
  12 static const struct clk_master_characteristics mck_characteristics = {
  13         .output = { .min = 140000000, .max = 200000000 },
  14         .divisors = { 1, 2, 4, 3 },
  15         .have_div3_pres = 1,
  16 };
  17
  18 static const struct clk_master_layout sam9x60_master_layout = {
  19         .mask = 0x373,
  20         .pres_shift = 4,
  21         .offset = 0x28,
  22 };
  23
  24 static const struct clk_range plla_outputs[] = {
  25         { .min = 2343750, .max = 1200000000 },
  26 };
  27
  28 static const struct clk_pll_characteristics plla_characteristics = {
  29         .input = { .min = 12000000, .max = 48000000 },
  30         .num_output = ARRAY_SIZE(plla_outputs),
  31         .output = plla_outputs,
  32 };
  33
  34 static const struct clk_range upll_outputs[] = {
  35         { .min = 300000000, .max = 500000000 },
  36 };
  37
  38 static const struct clk_pll_characteristics upll_characteristics = {
  39         .input = { .min = 12000000, .max = 48000000 },
  40         .num_output = ARRAY_SIZE(upll_outputs),
  41         .output = upll_outputs,
  42         .upll = true,
  43 };
  44
  45 static const struct clk_pll_layout pll_frac_layout = {
  46         .mul_mask = GENMASK(31, 24),
  47         .frac_mask = GENMASK(21, 0),
  48         .mul_shift = 24,
  49         .frac_shift = 0,
  50 };
  51
  52 static const struct clk_pll_layout pll_div_layout = {
  53         .div_mask = GENMASK(7, 0),
  54         .endiv_mask = BIT(29),
  55         .div_shift = 0,
  56         .endiv_shift = 29,
  57 };
  58
  59 static const struct clk_programmable_layout sam9x60_programmable_layout = {
  60         .pres_mask = 0xff,
  61         .pres_shift = 8,
  62         .css_mask = 0x1f,
  63         .have_slck_mck = 0,
  64         .is_pres_direct = 1,
  65 };
  66
  67 static const struct clk_pcr_layout sam9x60_pcr_layout = {
  68         .offset = 0x88,
  69         .cmd = BIT(31),
  70         .gckcss_mask = GENMASK(12, 8),
  71         .pid_mask = GENMASK(6, 0),
  72 };
  73
  74 static const struct {
  75         char *n;
  76         char *p;
  77         u8 id;
  78 } sam9x60_systemck[] = {
  79         { .n = "ddrck",  .p = "masterck", .id = 2 },
  80         { .n = "uhpck",  .p = "usbck",    .id = 6 },
  81         { .n = "pck0",   .p = "prog0",    .id = 8 },
  82         { .n = "pck1",   .p = "prog1",    .id = 9 },
  83         { .n = "qspick", .p = "masterck", .id = 19 },
  84 };
  85
  86 static const struct {
  87         char *n;
  88         u8 id;
  89 } sam9x60_periphck[] = {
  90         { .n = "pioA_clk",   .id = 2, },
  91         { .n = "pioB_clk",   .id = 3, },
  92         { .n = "pioC_clk",   .id = 4, },
  93         { .n = "flex0_clk",  .id = 5, },
  94         { .n = "flex1_clk",  .id = 6, },
  95         { .n = "flex2_clk",  .id = 7, },
  96         { .n = "flex3_clk",  .id = 8, },
  97         { .n = "flex6_clk",  .id = 9, },
  98         { .n = "flex7_clk",  .id = 10, },
  99         { .n = "flex8_clk",  .id = 11, },
 100         { .n = "sdmmc0_clk", .id = 12, },
 101         { .n = "flex4_clk",  .id = 13, },
 102         { .n = "flex5_clk",  .id = 14, },
 103         { .n = "flex9_clk",  .id = 15, },
 104         { .n = "flex10_clk", .id = 16, },
 105         { .n = "tcb0_clk",   .id = 17, },
 106         { .n = "pwm_clk",    .id = 18, },
 107         { .n = "adc_clk",    .id = 19, },
 108         { .n = "dma0_clk",   .id = 20, },
 109         { .n = "matrix_clk", .id = 21, },
 110         { .n = "uhphs_clk",  .id = 22, },
 111         { .n = "udphs_clk",  .id = 23, },
 112         { .n = "macb0_clk",  .id = 24, },
 113         { .n = "lcd_clk",    .id = 25, },
 114         { .n = "sdmmc1_clk", .id = 26, },
 115         { .n = "macb1_clk",  .id = 27, },
 116         { .n = "ssc_clk",    .id = 28, },
 117         { .n = "can0_clk",   .id = 29, },
 118         { .n = "can1_clk",   .id = 30, },
 119         { .n = "flex11_clk", .id = 32, },
 120         { .n = "flex12_clk", .id = 33, },
 121         { .n = "i2s_clk",    .id = 34, },
 122         { .n = "qspi_clk",   .id = 35, },
 123         { .n = "gfx2d_clk",  .id = 36, },
 124         { .n = "pit64b_clk", .id = 37, },
 125         { .n = "trng_clk",   .id = 38, },
 126         { .n = "aes_clk",    .id = 39, },
 127         { .n = "tdes_clk",   .id = 40, },
 128         { .n = "sha_clk",    .id = 41, },
 129         { .n = "classd_clk", .id = 42, },
 130         { .n = "isi_clk",    .id = 43, },
 131         { .n = "pioD_clk",   .id = 44, },
 132         { .n = "tcb1_clk",   .id = 45, },
 133         { .n = "dbgu_clk",   .id = 47, },
 134         { .n = "mpddr_clk",  .id = 49, },
 135 };
 136
 137 static const struct {
 138         char *n;
 139         u8 id;
 140         struct clk_range r;
 141 } sam9x60_gck[] = {
 142         { .n = "flex0_gclk",  .id = 5, },
 143         { .n = "flex1_gclk",  .id = 6, },
 144         { .n = "flex2_gclk",  .id = 7, },
 145         { .n = "flex3_gclk",  .id = 8, },
 146         { .n = "flex6_gclk",  .id = 9, },
 147         { .n = "flex7_gclk",  .id = 10, },
 148         { .n = "flex8_gclk",  .id = 11, },
 149         { .n = "sdmmc0_gclk", .id = 12, .r = { .min = 0, .max = 105000000 }, },
 150         { .n = "flex4_gclk",  .id = 13, },
 151         { .n = "flex5_gclk",  .id = 14, },
 152         { .n = "flex9_gclk",  .id = 15, },
 153         { .n = "flex10_gclk", .id = 16, },
 154         { .n = "tcb0_gclk",   .id = 17, },
 155         { .n = "adc_gclk",    .id = 19, },
 156         { .n = "lcd_gclk",    .id = 25, .r = { .min = 0, .max = 140000000 }, },
 157         { .n = "sdmmc1_gclk", .id = 26, .r = { .min = 0, .max = 105000000 }, },
 158         { .n = "flex11_gclk", .id = 32, },
 159         { .n = "flex12_gclk", .id = 33, },
 160         { .n = "i2s_gclk",    .id = 34, .r = { .min = 0, .max = 105000000 }, },
 161         { .n = "pit64b_gclk", .id = 37, },
 162         { .n = "classd_gclk", .id = 42, .r = { .min = 0, .max = 100000000 }, },
 163         { .n = "tcb1_gclk",   .id = 45, },
 164         { .n = "dbgu_gclk",   .id = 47, },
 165 };
 166
 167 static void __init sam9x60_pmc_setup(struct device_node *np)
 168 {
 169         struct clk_range range = CLK_RANGE(0, 0);
 170         const char *td_slck_name, *md_slck_name, *mainxtal_name;
 171         struct pmc_data *sam9x60_pmc;
 172         const char *parent_names[6];
 173         struct clk_hw *main_osc_hw;
 174         struct regmap *regmap;
 175         struct clk_hw *hw;
 176         int i;
 177         bool bypass;
 178
 179         i = of_property_match_string(np, "clock-names", "td_slck");
 180         if (i < 0)
 181                 return;
 182
 183         td_slck_name = of_clk_get_parent_name(np, i);
 184
 185         i = of_property_match_string(np, "clock-names", "md_slck");
 186         if (i < 0)
 187                 return;
 188
 189         md_slck_name = of_clk_get_parent_name(np, i);
 190
 191         i = of_property_match_string(np, "clock-names", "main_xtal");
 192         if (i < 0)
 193                 return;
 194         mainxtal_name = of_clk_get_parent_name(np, i);
 195
 196         regmap = device_node_to_regmap(np);
 197         if (IS_ERR(regmap))
 198                 return;
 199
 200         sam9x60_pmc = pmc_data_allocate(PMC_PLLACK + 1,
 201                                         nck(sam9x60_systemck),
 202                                         nck(sam9x60_periphck),
 203                                         nck(sam9x60_gck), 8);
 204         if (!sam9x60_pmc)
 205                 return;
 206
 207         hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000,
 208                                            50000000);
 209         if (IS_ERR(hw))
 210                 goto err_free;
 211
 212         bypass = of_property_read_bool(np, "atmel,osc-bypass");
 213
 214         hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
 215                                         bypass);
 216         if (IS_ERR(hw))
 217                 goto err_free;
 218         main_osc_hw = hw;
 219
 220         parent_names[0] = "main_rc_osc";
 221         parent_names[1] = "main_osc";
 222         hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2);
 223         if (IS_ERR(hw))
 224                 goto err_free;
 225
 226         sam9x60_pmc->chws[PMC_MAIN] = hw;
 227
 228         hw = sam9x60_clk_register_frac_pll(regmap, &pmc_pll_lock, "pllack_fracck",
 229                                            "mainck", sam9x60_pmc->chws[PMC_MAIN],
 230                                            0, &plla_characteristics,
 231                                            &pll_frac_layout, true);
 232         if (IS_ERR(hw))
 233                 goto err_free;
 234
 235         hw = sam9x60_clk_register_div_pll(regmap, &pmc_pll_lock, "pllack_divck",
 236                                           "pllack_fracck", 0, &plla_characteristics,
 237                                           &pll_div_layout, true);
 238         if (IS_ERR(hw))
 239                 goto err_free;
 240
 241         sam9x60_pmc->chws[PMC_PLLACK] = hw;
 242
 243         hw = sam9x60_clk_register_frac_pll(regmap, &pmc_pll_lock, "upllck_fracck",
 244                                            "main_osc", main_osc_hw, 1,
 245                                            &upll_characteristics,
 246                                            &pll_frac_layout, false);
 247         if (IS_ERR(hw))
 248                 goto err_free;
 249
 250         hw = sam9x60_clk_register_div_pll(regmap, &pmc_pll_lock, "upllck_divck",
 251                                           "upllck_fracck", 1, &upll_characteristics,
 252                                           &pll_div_layout, false);
 253         if (IS_ERR(hw))
 254                 goto err_free;
 255
 256         sam9x60_pmc->chws[PMC_UTMI] = hw;
 257
 258         parent_names[0] = md_slck_name;
 259         parent_names[1] = "mainck";
 260         parent_names[2] = "pllack_divck";
 261         hw = at91_clk_register_master(regmap, "masterck", 3, parent_names,
 262                                       &sam9x60_master_layout,
 263                                       &mck_characteristics);
 264         if (IS_ERR(hw))
 265                 goto err_free;
 266
 267         sam9x60_pmc->chws[PMC_MCK] = hw;
 268
 269         parent_names[0] = "pllack_divck";
 270         parent_names[1] = "upllck_divck";
 271         parent_names[2] = "main_osc";
 272         hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 3);
 273         if (IS_ERR(hw))
 274                 goto err_free;
 275
 276         parent_names[0] = md_slck_name;
 277         parent_names[1] = td_slck_name;
 278         parent_names[2] = "mainck";
 279         parent_names[3] = "masterck";
 280         parent_names[4] = "pllack_divck";
 281         parent_names[5] = "upllck_divck";
 282         for (i = 0; i < 8; i++) {
 283                 char name[6];
 284
 285                 snprintf(name, sizeof(name), "prog%d", i);
 286
 287                 hw = at91_clk_register_programmable(regmap, name,
 288                                                     parent_names, 6, i,
 289                                                     &sam9x60_programmable_layout,
 290                                                     NULL);
 291                 if (IS_ERR(hw))
 292                         goto err_free;
 293
 294                 sam9x60_pmc->pchws[i] = hw;
 295         }
 296
 297         for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) {
 298                 hw = at91_clk_register_system(regmap, sam9x60_systemck[i].n,
 299                                               sam9x60_systemck[i].p,
 300                                               sam9x60_systemck[i].id);
 301                 if (IS_ERR(hw))
 302                         goto err_free;
 303
 304                 sam9x60_pmc->shws[sam9x60_systemck[i].id] = hw;
 305         }
 306
 307         for (i = 0; i < ARRAY_SIZE(sam9x60_periphck); i++) {
 308                 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 309                                                          &sam9x60_pcr_layout,
 310                                                          sam9x60_periphck[i].n,
 311                                                          "masterck",
 312                                                          sam9x60_periphck[i].id,
 313                                                          &range, INT_MIN);
 314                 if (IS_ERR(hw))
 315                         goto err_free;
 316
 317                 sam9x60_pmc->phws[sam9x60_periphck[i].id] = hw;
 318         }
 319
 320         for (i = 0; i < ARRAY_SIZE(sam9x60_gck); i++) {
 321                 hw = at91_clk_register_generated(regmap, &pmc_pcr_lock,
 322                                                  &sam9x60_pcr_layout,
 323                                                  sam9x60_gck[i].n,
 324                                                  parent_names, NULL, 6,
 325                                                  sam9x60_gck[i].id,
 326                                                  &sam9x60_gck[i].r, INT_MIN);
 327                 if (IS_ERR(hw))
 328                         goto err_free;
 329
 330                 sam9x60_pmc->ghws[sam9x60_gck[i].id] = hw;
 331         }
 332
 333         of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x60_pmc);
 334
 335         return;
 336
 337 err_free:
 338         kfree(sam9x60_pmc);
 339 }
 340 /* Some clks are used for a clocksource */
 341 CLK_OF_DECLARE(sam9x60_pmc, "microchip,sam9x60-pmc", sam9x60_pmc_setup);