drivers/clk/at91/sama5d3.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(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         u8 id;
  44 } sama5d3_systemck[] = {
  45         { .n = "ddrck", .p = "masterck_div", .id = 2 },
  46         { .n = "lcdck", .p = "masterck_div", .id = 3 },
  47         { .n = "smdck", .p = "smdclk",       .id = 4 },
  48         { .n = "uhpck", .p = "usbck",        .id = 6 },
  49         { .n = "udpck", .p = "usbck",        .id = 7 },
  50         { .n = "pck0",  .p = "prog0",        .id = 8 },
  51         { .n = "pck1",  .p = "prog1",        .id = 9 },
  52         { .n = "pck2",  .p = "prog2",        .id = 10 },
  53 };
  54
  55 static const struct {
  56         char *n;
  57         u8 id;
  58         struct clk_range r;
  59 } sama5d3_periphck[] = {
  60         { .n = "dbgu_clk", .id = 2, },
  61         { .n = "hsmc_clk", .id = 5, },
  62         { .n = "pioA_clk", .id = 6, },
  63         { .n = "pioB_clk", .id = 7, },
  64         { .n = "pioC_clk", .id = 8, },
  65         { .n = "pioD_clk", .id = 9, },
  66         { .n = "pioE_clk", .id = 10, },
  67         { .n = "usart0_clk", .id = 12, .r = { .min = 0, .max = 83000000 }, },
  68         { .n = "usart1_clk", .id = 13, .r = { .min = 0, .max = 83000000 }, },
  69         { .n = "usart2_clk", .id = 14, .r = { .min = 0, .max = 83000000 }, },
  70         { .n = "usart3_clk", .id = 15, .r = { .min = 0, .max = 83000000 }, },
  71         { .n = "uart0_clk", .id = 16, .r = { .min = 0, .max = 83000000 }, },
  72         { .n = "uart1_clk", .id = 17, .r = { .min = 0, .max = 83000000 }, },
  73         { .n = "twi0_clk", .id = 18, .r = { .min = 0, .max = 41500000 }, },
  74         { .n = "twi1_clk", .id = 19, .r = { .min = 0, .max = 41500000 }, },
  75         { .n = "twi2_clk", .id = 20, .r = { .min = 0, .max = 41500000 }, },
  76         { .n = "mci0_clk", .id = 21, },
  77         { .n = "mci1_clk", .id = 22, },
  78         { .n = "mci2_clk", .id = 23, },
  79         { .n = "spi0_clk", .id = 24, .r = { .min = 0, .max = 166000000 }, },
  80         { .n = "spi1_clk", .id = 25, .r = { .min = 0, .max = 166000000 }, },
  81         { .n = "tcb0_clk", .id = 26, .r = { .min = 0, .max = 166000000 }, },
  82         { .n = "tcb1_clk", .id = 27, .r = { .min = 0, .max = 166000000 }, },
  83         { .n = "pwm_clk", .id = 28, },
  84         { .n = "adc_clk", .id = 29, .r = { .min = 0, .max = 83000000 }, },
  85         { .n = "dma0_clk", .id = 30, },
  86         { .n = "dma1_clk", .id = 31, },
  87         { .n = "uhphs_clk", .id = 32, },
  88         { .n = "udphs_clk", .id = 33, },
  89         { .n = "macb0_clk", .id = 34, },
  90         { .n = "macb1_clk", .id = 35, },
  91         { .n = "lcdc_clk", .id = 36, },
  92         { .n = "isi_clk", .id = 37, },
  93         { .n = "ssc0_clk", .id = 38, .r = { .min = 0, .max = 83000000 }, },
  94         { .n = "ssc1_clk", .id = 39, .r = { .min = 0, .max = 83000000 }, },
  95         { .n = "can0_clk", .id = 40, .r = { .min = 0, .max = 83000000 }, },
  96         { .n = "can1_clk", .id = 41, .r = { .min = 0, .max = 83000000 }, },
  97         { .n = "sha_clk", .id = 42, },
  98         { .n = "aes_clk", .id = 43, },
  99         { .n = "tdes_clk", .id = 44, },
 100         { .n = "trng_clk", .id = 45, },
 101         { .n = "fuse_clk", .id = 48, },
 102         { .n = "mpddr_clk", .id = 49, },
 103 };
 104
 105 static void __init sama5d3_pmc_setup(struct device_node *np)
 106 {
 107         const char *slck_name, *mainxtal_name;
 108         struct pmc_data *sama5d3_pmc;
 109         const char *parent_names[5];
 110         struct regmap *regmap;
 111         struct clk_hw *hw;
 112         int i;
 113         bool bypass;
 114
 115         i = of_property_match_string(np, "clock-names", "slow_clk");
 116         if (i < 0)
 117                 return;
 118
 119         slck_name = of_clk_get_parent_name(np, i);
 120
 121         i = of_property_match_string(np, "clock-names", "main_xtal");
 122         if (i < 0)
 123                 return;
 124         mainxtal_name = of_clk_get_parent_name(np, i);
 125
 126         regmap = device_node_to_regmap(np);
 127         if (IS_ERR(regmap))
 128                 return;
 129
 130         sama5d3_pmc = pmc_data_allocate(PMC_PLLACK + 1,
 131                                         nck(sama5d3_systemck),
 132                                         nck(sama5d3_periphck), 0, 3);
 133         if (!sama5d3_pmc)
 134                 return;
 135
 136         hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000,
 137                                            50000000);
 138         if (IS_ERR(hw))
 139                 goto err_free;
 140
 141         bypass = of_property_read_bool(np, "atmel,osc-bypass");
 142
 143         hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
 144                                         bypass);
 145         if (IS_ERR(hw))
 146                 goto err_free;
 147
 148         parent_names[0] = "main_rc_osc";
 149         parent_names[1] = "main_osc";
 150         hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2);
 151         if (IS_ERR(hw))
 152                 goto err_free;
 153
 154         hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0,
 155                                    &sama5d3_pll_layout, &plla_characteristics);
 156         if (IS_ERR(hw))
 157                 goto err_free;
 158
 159         hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack");
 160         if (IS_ERR(hw))
 161                 goto err_free;
 162
 163         sama5d3_pmc->chws[PMC_PLLACK] = hw;
 164
 165         hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
 166         if (IS_ERR(hw))
 167                 goto err_free;
 168
 169         sama5d3_pmc->chws[PMC_UTMI] = hw;
 170
 171         parent_names[0] = slck_name;
 172         parent_names[1] = "mainck";
 173         parent_names[2] = "plladivck";
 174         parent_names[3] = "utmick";
 175         hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
 176                                            parent_names,
 177                                            &at91sam9x5_master_layout,
 178                                            &mck_characteristics, &mck_lock);
 179         if (IS_ERR(hw))
 180                 goto err_free;
 181
 182         hw = at91_clk_register_master_div(regmap, "masterck_div",
 183                                           "masterck_pres",
 184                                           &at91sam9x5_master_layout,
 185                                           &mck_characteristics, &mck_lock,
 186                                           CLK_SET_RATE_GATE, 0);
 187         if (IS_ERR(hw))
 188                 goto err_free;
 189
 190         sama5d3_pmc->chws[PMC_MCK] = hw;
 191
 192         parent_names[0] = "plladivck";
 193         parent_names[1] = "utmick";
 194         hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2);
 195         if (IS_ERR(hw))
 196                 goto err_free;
 197
 198         hw = at91sam9x5_clk_register_smd(regmap, "smdclk", parent_names, 2);
 199         if (IS_ERR(hw))
 200                 goto err_free;
 201
 202         parent_names[0] = slck_name;
 203         parent_names[1] = "mainck";
 204         parent_names[2] = "plladivck";
 205         parent_names[3] = "utmick";
 206         parent_names[4] = "masterck_div";
 207         for (i = 0; i < 3; i++) {
 208                 char name[6];
 209
 210                 snprintf(name, sizeof(name), "prog%d", i);
 211
 212                 hw = at91_clk_register_programmable(regmap, name,
 213                                                     parent_names, 5, i,
 214                                                     &at91sam9x5_programmable_layout,
 215                                                     NULL);
 216                 if (IS_ERR(hw))
 217                         goto err_free;
 218
 219                 sama5d3_pmc->pchws[i] = hw;
 220         }
 221
 222         for (i = 0; i < ARRAY_SIZE(sama5d3_systemck); i++) {
 223                 hw = at91_clk_register_system(regmap, sama5d3_systemck[i].n,
 224                                               sama5d3_systemck[i].p,
 225                                               sama5d3_systemck[i].id);
 226                 if (IS_ERR(hw))
 227                         goto err_free;
 228
 229                 sama5d3_pmc->shws[sama5d3_systemck[i].id] = hw;
 230         }
 231
 232         for (i = 0; i < ARRAY_SIZE(sama5d3_periphck); i++) {
 233                 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 234                                                          &sama5d3_pcr_layout,
 235                                                          sama5d3_periphck[i].n,
 236                                                          "masterck_div",
 237                                                          sama5d3_periphck[i].id,
 238                                                          &sama5d3_periphck[i].r,
 239                                                          INT_MIN);
 240                 if (IS_ERR(hw))
 241                         goto err_free;
 242
 243                 sama5d3_pmc->phws[sama5d3_periphck[i].id] = hw;
 244         }
 245
 246         of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d3_pmc);
 247
 248         return;
 249
 250 err_free:
 251         kfree(sama5d3_pmc);
 252 }
 253 /*
 254  * The TCB is used as the clocksource so its clock is needed early. This means
 255  * this can't be a platform driver.
 256  */
 257 CLK_OF_DECLARE(sama5d3_pmc, "atmel,sama5d3-pmc", sama5d3_pmc_setup);