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 = 300000000, .max = 600000000 },
  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_programmable_layout sam9x60_programmable_layout = {
  46         .pres_mask = 0xff,
  47         .pres_shift = 8,
  48         .css_mask = 0x1f,
  49         .have_slck_mck = 0,
  50         .is_pres_direct = 1,
  51 };
  52
  53 static const struct clk_pcr_layout sam9x60_pcr_layout = {
  54         .offset = 0x88,
  55         .cmd = BIT(31),
  56         .gckcss_mask = GENMASK(12, 8),
  57         .pid_mask = GENMASK(6, 0),
  58 };
  59
  60 static const struct {
  61         char *n;
  62         char *p;
  63         u8 id;
  64 } sam9x60_systemck[] = {
  65         { .n = "ddrck",  .p = "masterck", .id = 2 },
  66         { .n = "uhpck",  .p = "usbck",    .id = 6 },
  67         { .n = "pck0",   .p = "prog0",    .id = 8 },
  68         { .n = "pck1",   .p = "prog1",    .id = 9 },
  69         { .n = "qspick", .p = "masterck", .id = 19 },
  70 };
  71
  72 static const struct {
  73         char *n;
  74         u8 id;
  75 } sam9x60_periphck[] = {
  76         { .n = "pioA_clk",   .id = 2, },
  77         { .n = "pioB_clk",   .id = 3, },
  78         { .n = "pioC_clk",   .id = 4, },
  79         { .n = "flex0_clk",  .id = 5, },
  80         { .n = "flex1_clk",  .id = 6, },
  81         { .n = "flex2_clk",  .id = 7, },
  82         { .n = "flex3_clk",  .id = 8, },
  83         { .n = "flex6_clk",  .id = 9, },
  84         { .n = "flex7_clk",  .id = 10, },
  85         { .n = "flex8_clk",  .id = 11, },
  86         { .n = "sdmmc0_clk", .id = 12, },
  87         { .n = "flex4_clk",  .id = 13, },
  88         { .n = "flex5_clk",  .id = 14, },
  89         { .n = "flex9_clk",  .id = 15, },
  90         { .n = "flex10_clk", .id = 16, },
  91         { .n = "tcb0_clk",   .id = 17, },
  92         { .n = "pwm_clk",    .id = 18, },
  93         { .n = "adc_clk",    .id = 19, },
  94         { .n = "dma0_clk",   .id = 20, },
  95         { .n = "matrix_clk", .id = 21, },
  96         { .n = "uhphs_clk",  .id = 22, },
  97         { .n = "udphs_clk",  .id = 23, },
  98         { .n = "macb0_clk",  .id = 24, },
  99         { .n = "lcd_clk",    .id = 25, },
 100         { .n = "sdmmc1_clk", .id = 26, },
 101         { .n = "macb1_clk",  .id = 27, },
 102         { .n = "ssc_clk",    .id = 28, },
 103         { .n = "can0_clk",   .id = 29, },
 104         { .n = "can1_clk",   .id = 30, },
 105         { .n = "flex11_clk", .id = 32, },
 106         { .n = "flex12_clk", .id = 33, },
 107         { .n = "i2s_clk",    .id = 34, },
 108         { .n = "qspi_clk",   .id = 35, },
 109         { .n = "gfx2d_clk",  .id = 36, },
 110         { .n = "pit64b_clk", .id = 37, },
 111         { .n = "trng_clk",   .id = 38, },
 112         { .n = "aes_clk",    .id = 39, },
 113         { .n = "tdes_clk",   .id = 40, },
 114         { .n = "sha_clk",    .id = 41, },
 115         { .n = "classd_clk", .id = 42, },
 116         { .n = "isi_clk",    .id = 43, },
 117         { .n = "pioD_clk",   .id = 44, },
 118         { .n = "tcb1_clk",   .id = 45, },
 119         { .n = "dbgu_clk",   .id = 47, },
 120         { .n = "mpddr_clk",  .id = 49, },
 121 };
 122
 123 static const struct {
 124         char *n;
 125         u8 id;
 126         struct clk_range r;
 127         bool pll;
 128 } sam9x60_gck[] = {
 129         { .n = "flex0_gclk",  .id = 5, },
 130         { .n = "flex1_gclk",  .id = 6, },
 131         { .n = "flex2_gclk",  .id = 7, },
 132         { .n = "flex3_gclk",  .id = 8, },
 133         { .n = "flex6_gclk",  .id = 9, },
 134         { .n = "flex7_gclk",  .id = 10, },
 135         { .n = "flex8_gclk",  .id = 11, },
 136         { .n = "sdmmc0_gclk", .id = 12, .r = { .min = 0, .max = 105000000 }, },
 137         { .n = "flex4_gclk",  .id = 13, },
 138         { .n = "flex5_gclk",  .id = 14, },
 139         { .n = "flex9_gclk",  .id = 15, },
 140         { .n = "flex10_gclk", .id = 16, },
 141         { .n = "tcb0_gclk",   .id = 17, },
 142         { .n = "adc_gclk",    .id = 19, },
 143         { .n = "lcd_gclk",    .id = 25, .r = { .min = 0, .max = 140000000 }, },
 144         { .n = "sdmmc1_gclk", .id = 26, .r = { .min = 0, .max = 105000000 }, },
 145         { .n = "flex11_gclk", .id = 32, },
 146         { .n = "flex12_gclk", .id = 33, },
 147         { .n = "i2s_gclk",    .id = 34, .r = { .min = 0, .max = 105000000 },
 148                 .pll = true, },
 149         { .n = "pit64b_gclk", .id = 37, },
 150         { .n = "classd_gclk", .id = 42, .r = { .min = 0, .max = 100000000 },
 151                 .pll = true, },
 152         { .n = "tcb1_gclk",   .id = 45, },
 153         { .n = "dbgu_gclk",   .id = 47, },
 154 };
 155
 156 static void __init sam9x60_pmc_setup(struct device_node *np)
 157 {
 158         struct clk_range range = CLK_RANGE(0, 0);
 159         const char *td_slck_name, *md_slck_name, *mainxtal_name;
 160         struct pmc_data *sam9x60_pmc;
 161         const char *parent_names[6];
 162         struct regmap *regmap;
 163         struct clk_hw *hw;
 164         int i;
 165         bool bypass;
 166
 167         i = of_property_match_string(np, "clock-names", "td_slck");
 168         if (i < 0)
 169                 return;
 170
 171         td_slck_name = of_clk_get_parent_name(np, i);
 172
 173         i = of_property_match_string(np, "clock-names", "md_slck");
 174         if (i < 0)
 175                 return;
 176
 177         md_slck_name = of_clk_get_parent_name(np, i);
 178
 179         i = of_property_match_string(np, "clock-names", "main_xtal");
 180         if (i < 0)
 181                 return;
 182         mainxtal_name = of_clk_get_parent_name(np, i);
 183
 184         regmap = syscon_node_to_regmap(np);
 185         if (IS_ERR(regmap))
 186                 return;
 187
 188         sam9x60_pmc = pmc_data_allocate(PMC_MAIN + 1,
 189                                         nck(sam9x60_systemck),
 190                                         nck(sam9x60_periphck),
 191                                         nck(sam9x60_gck));
 192         if (!sam9x60_pmc)
 193                 return;
 194
 195         hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 24000000,
 196                                            50000000);
 197         if (IS_ERR(hw))
 198                 goto err_free;
 199
 200         bypass = of_property_read_bool(np, "atmel,osc-bypass");
 201
 202         hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
 203                                         bypass);
 204         if (IS_ERR(hw))
 205                 goto err_free;
 206
 207         parent_names[0] = "main_rc_osc";
 208         parent_names[1] = "main_osc";
 209         hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2);
 210         if (IS_ERR(hw))
 211                 goto err_free;
 212
 213         sam9x60_pmc->chws[PMC_MAIN] = hw;
 214
 215         hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "pllack",
 216                                       "mainck", 0, &plla_characteristics);
 217         if (IS_ERR(hw))
 218                 goto err_free;
 219
 220         hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "upllck",
 221                                       "main_osc", 1, &upll_characteristics);
 222         if (IS_ERR(hw))
 223                 goto err_free;
 224
 225         sam9x60_pmc->chws[PMC_UTMI] = hw;
 226
 227         parent_names[0] = md_slck_name;
 228         parent_names[1] = "mainck";
 229         parent_names[2] = "pllack";
 230         hw = at91_clk_register_master(regmap, "masterck", 3, parent_names,
 231                                       &sam9x60_master_layout,
 232                                       &mck_characteristics);
 233         if (IS_ERR(hw))
 234                 goto err_free;
 235
 236         sam9x60_pmc->chws[PMC_MCK] = hw;
 237
 238         parent_names[0] = "pllack";
 239         parent_names[1] = "upllck";
 240         parent_names[2] = "main_osc";
 241         hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 3);
 242         if (IS_ERR(hw))
 243                 goto err_free;
 244
 245         parent_names[0] = md_slck_name;
 246         parent_names[1] = td_slck_name;
 247         parent_names[2] = "mainck";
 248         parent_names[3] = "masterck";
 249         parent_names[4] = "pllack";
 250         parent_names[5] = "upllck";
 251         for (i = 0; i < 8; i++) {
 252                 char name[6];
 253
 254                 snprintf(name, sizeof(name), "prog%d", i);
 255
 256                 hw = at91_clk_register_programmable(regmap, name,
 257                                                     parent_names, 6, i,
 258                                                     &sam9x60_programmable_layout);
 259                 if (IS_ERR(hw))
 260                         goto err_free;
 261         }
 262
 263         for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) {
 264                 hw = at91_clk_register_system(regmap, sam9x60_systemck[i].n,
 265                                               sam9x60_systemck[i].p,
 266                                               sam9x60_systemck[i].id);
 267                 if (IS_ERR(hw))
 268                         goto err_free;
 269
 270                 sam9x60_pmc->shws[sam9x60_systemck[i].id] = hw;
 271         }
 272
 273         for (i = 0; i < ARRAY_SIZE(sam9x60_periphck); i++) {
 274                 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 275                                                          &sam9x60_pcr_layout,
 276                                                          sam9x60_periphck[i].n,
 277                                                          "masterck",
 278                                                          sam9x60_periphck[i].id,
 279                                                          &range);
 280                 if (IS_ERR(hw))
 281                         goto err_free;
 282
 283                 sam9x60_pmc->phws[sam9x60_periphck[i].id] = hw;
 284         }
 285
 286         for (i = 0; i < ARRAY_SIZE(sam9x60_gck); i++) {
 287                 hw = at91_clk_register_generated(regmap, &pmc_pcr_lock,
 288                                                  &sam9x60_pcr_layout,
 289                                                  sam9x60_gck[i].n,
 290                                                  parent_names, 6,
 291                                                  sam9x60_gck[i].id,
 292                                                  sam9x60_gck[i].pll,
 293                                                  &sam9x60_gck[i].r);
 294                 if (IS_ERR(hw))
 295                         goto err_free;
 296
 297                 sam9x60_pmc->ghws[sam9x60_gck[i].id] = hw;
 298         }
 299
 300         of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x60_pmc);
 301
 302         return;
 303
 304 err_free:
 305         pmc_data_free(sam9x60_pmc);
 306 }
 307 /* Some clks are used for a clocksource */
 308 CLK_OF_DECLARE(sam9x60_pmc, "microchip,sam9x60-pmc", sam9x60_pmc_setup);