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 } sam9x60_gck[] = { 128 { .n = "flex0_gclk", .id = 5, }, 129 { .n = "flex1_gclk", .id = 6, }, 130 { .n = "flex2_gclk", .id = 7, }, 131 { .n = "flex3_gclk", .id = 8, }, 132 { .n = "flex6_gclk", .id = 9, }, 133 { .n = "flex7_gclk", .id = 10, }, 134 { .n = "flex8_gclk", .id = 11, }, 135 { .n = "sdmmc0_gclk", .id = 12, .r = { .min = 0, .max = 105000000 }, }, 136 { .n = "flex4_gclk", .id = 13, }, 137 { .n = "flex5_gclk", .id = 14, }, 138 { .n = "flex9_gclk", .id = 15, }, 139 { .n = "flex10_gclk", .id = 16, }, 140 { .n = "tcb0_gclk", .id = 17, }, 141 { .n = "adc_gclk", .id = 19, }, 142 { .n = "lcd_gclk", .id = 25, .r = { .min = 0, .max = 140000000 }, }, 143 { .n = "sdmmc1_gclk", .id = 26, .r = { .min = 0, .max = 105000000 }, }, 144 { .n = "flex11_gclk", .id = 32, }, 145 { .n = "flex12_gclk", .id = 33, }, 146 { .n = "i2s_gclk", .id = 34, .r = { .min = 0, .max = 105000000 }, }, 147 { .n = "pit64b_gclk", .id = 37, }, 148 { .n = "classd_gclk", .id = 42, .r = { .min = 0, .max = 100000000 }, }, 149 { .n = "tcb1_gclk", .id = 45, }, 150 { .n = "dbgu_gclk", .id = 47, }, 151 }; 152 153 static void __init sam9x60_pmc_setup(struct device_node *np) 154 { 155 struct clk_range range = CLK_RANGE(0, 0); 156 const char *td_slck_name, *md_slck_name, *mainxtal_name; 157 struct pmc_data *sam9x60_pmc; 158 const char *parent_names[6]; 159 struct regmap *regmap; 160 struct clk_hw *hw; 161 int i; 162 bool bypass; 163 164 i = of_property_match_string(np, "clock-names", "td_slck"); 165 if (i < 0) 166 return; 167 168 td_slck_name = of_clk_get_parent_name(np, i); 169 170 i = of_property_match_string(np, "clock-names", "md_slck"); 171 if (i < 0) 172 return; 173 174 md_slck_name = of_clk_get_parent_name(np, i); 175 176 i = of_property_match_string(np, "clock-names", "main_xtal"); 177 if (i < 0) 178 return; 179 mainxtal_name = of_clk_get_parent_name(np, i); 180 181 regmap = syscon_node_to_regmap(np); 182 if (IS_ERR(regmap)) 183 return; 184 185 sam9x60_pmc = pmc_data_allocate(PMC_PLLACK + 1, 186 nck(sam9x60_systemck), 187 nck(sam9x60_periphck), 188 nck(sam9x60_gck), 8); 189 if (!sam9x60_pmc) 190 return; 191 192 hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 24000000, 193 50000000); 194 if (IS_ERR(hw)) 195 goto err_free; 196 197 bypass = of_property_read_bool(np, "atmel,osc-bypass"); 198 199 hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, 200 bypass); 201 if (IS_ERR(hw)) 202 goto err_free; 203 204 parent_names[0] = "main_rc_osc"; 205 parent_names[1] = "main_osc"; 206 hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2); 207 if (IS_ERR(hw)) 208 goto err_free; 209 210 sam9x60_pmc->chws[PMC_MAIN] = hw; 211 212 hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "pllack", 213 "mainck", 0, &plla_characteristics); 214 if (IS_ERR(hw)) 215 goto err_free; 216 217 sam9x60_pmc->chws[PMC_PLLACK] = hw; 218 219 hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "upllck", 220 "main_osc", 1, &upll_characteristics); 221 if (IS_ERR(hw)) 222 goto err_free; 223 224 sam9x60_pmc->chws[PMC_UTMI] = hw; 225 226 parent_names[0] = md_slck_name; 227 parent_names[1] = "mainck"; 228 parent_names[2] = "pllack"; 229 hw = at91_clk_register_master(regmap, "masterck", 3, parent_names, 230 &sam9x60_master_layout, 231 &mck_characteristics); 232 if (IS_ERR(hw)) 233 goto err_free; 234 235 sam9x60_pmc->chws[PMC_MCK] = hw; 236 237 parent_names[0] = "pllack"; 238 parent_names[1] = "upllck"; 239 parent_names[2] = "main_osc"; 240 hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 3); 241 if (IS_ERR(hw)) 242 goto err_free; 243 244 parent_names[0] = md_slck_name; 245 parent_names[1] = td_slck_name; 246 parent_names[2] = "mainck"; 247 parent_names[3] = "masterck"; 248 parent_names[4] = "pllack"; 249 parent_names[5] = "upllck"; 250 for (i = 0; i < 8; i++) { 251 char name[6]; 252 253 snprintf(name, sizeof(name), "prog%d", i); 254 255 hw = at91_clk_register_programmable(regmap, name, 256 parent_names, 6, i, 257 &sam9x60_programmable_layout); 258 if (IS_ERR(hw)) 259 goto err_free; 260 261 sam9x60_pmc->pchws[i] = hw; 262 } 263 264 for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) { 265 hw = at91_clk_register_system(regmap, sam9x60_systemck[i].n, 266 sam9x60_systemck[i].p, 267 sam9x60_systemck[i].id); 268 if (IS_ERR(hw)) 269 goto err_free; 270 271 sam9x60_pmc->shws[sam9x60_systemck[i].id] = hw; 272 } 273 274 for (i = 0; i < ARRAY_SIZE(sam9x60_periphck); i++) { 275 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, 276 &sam9x60_pcr_layout, 277 sam9x60_periphck[i].n, 278 "masterck", 279 sam9x60_periphck[i].id, 280 &range); 281 if (IS_ERR(hw)) 282 goto err_free; 283 284 sam9x60_pmc->phws[sam9x60_periphck[i].id] = hw; 285 } 286 287 for (i = 0; i < ARRAY_SIZE(sam9x60_gck); i++) { 288 hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, 289 &sam9x60_pcr_layout, 290 sam9x60_gck[i].n, 291 parent_names, 6, 292 sam9x60_gck[i].id, 293 false, 294 &sam9x60_gck[i].r); 295 if (IS_ERR(hw)) 296 goto err_free; 297 298 sam9x60_pmc->ghws[sam9x60_gck[i].id] = hw; 299 } 300 301 of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x60_pmc); 302 303 return; 304 305 err_free: 306 kfree(sam9x60_pmc); 307 } 308 /* Some clks are used for a clocksource */ 309 CLK_OF_DECLARE(sam9x60_pmc, "microchip,sam9x60-pmc", sam9x60_pmc_setup); 310