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 const struct clk_master_characteristics sam9rl_mck_characteristics = { 11 .output = { .min = 0, .max = 94000000 }, 12 .divisors = { 1, 2, 4, 0 }, 13 }; 14 15 static u8 sam9rl_plla_out[] = { 0, 2 }; 16 17 static const struct clk_range sam9rl_plla_outputs[] = { 18 { .min = 80000000, .max = 200000000 }, 19 { .min = 190000000, .max = 240000000 }, 20 }; 21 22 static const struct clk_pll_characteristics sam9rl_plla_characteristics = { 23 .input = { .min = 1000000, .max = 32000000 }, 24 .num_output = ARRAY_SIZE(sam9rl_plla_outputs), 25 .output = sam9rl_plla_outputs, 26 .out = sam9rl_plla_out, 27 }; 28 29 static const struct { 30 char *n; 31 char *p; 32 u8 id; 33 } at91sam9rl_systemck[] = { 34 { .n = "pck0", .p = "prog0", .id = 8 }, 35 { .n = "pck1", .p = "prog1", .id = 9 }, 36 }; 37 38 static const struct { 39 char *n; 40 u8 id; 41 } at91sam9rl_periphck[] = { 42 { .n = "pioA_clk", .id = 2, }, 43 { .n = "pioB_clk", .id = 3, }, 44 { .n = "pioC_clk", .id = 4, }, 45 { .n = "pioD_clk", .id = 5, }, 46 { .n = "usart0_clk", .id = 6, }, 47 { .n = "usart1_clk", .id = 7, }, 48 { .n = "usart2_clk", .id = 8, }, 49 { .n = "usart3_clk", .id = 9, }, 50 { .n = "mci0_clk", .id = 10, }, 51 { .n = "twi0_clk", .id = 11, }, 52 { .n = "twi1_clk", .id = 12, }, 53 { .n = "spi0_clk", .id = 13, }, 54 { .n = "ssc0_clk", .id = 14, }, 55 { .n = "ssc1_clk", .id = 15, }, 56 { .n = "tc0_clk", .id = 16, }, 57 { .n = "tc1_clk", .id = 17, }, 58 { .n = "tc2_clk", .id = 18, }, 59 { .n = "pwm_clk", .id = 19, }, 60 { .n = "adc_clk", .id = 20, }, 61 { .n = "dma0_clk", .id = 21, }, 62 { .n = "udphs_clk", .id = 22, }, 63 { .n = "lcd_clk", .id = 23, }, 64 }; 65 66 static void __init at91sam9rl_pmc_setup(struct device_node *np) 67 { 68 const char *slck_name, *mainxtal_name; 69 struct pmc_data *at91sam9rl_pmc; 70 const char *parent_names[6]; 71 struct regmap *regmap; 72 struct clk_hw *hw; 73 int i; 74 75 i = of_property_match_string(np, "clock-names", "slow_clk"); 76 if (i < 0) 77 return; 78 79 slck_name = of_clk_get_parent_name(np, i); 80 81 i = of_property_match_string(np, "clock-names", "main_xtal"); 82 if (i < 0) 83 return; 84 mainxtal_name = of_clk_get_parent_name(np, i); 85 86 regmap = syscon_node_to_regmap(np); 87 if (IS_ERR(regmap)) 88 return; 89 90 at91sam9rl_pmc = pmc_data_allocate(PMC_MAIN + 1, 91 nck(at91sam9rl_systemck), 92 nck(at91sam9rl_periphck), 0); 93 if (!at91sam9rl_pmc) 94 return; 95 96 hw = at91_clk_register_rm9200_main(regmap, "mainck", mainxtal_name); 97 if (IS_ERR(hw)) 98 goto err_free; 99 100 at91sam9rl_pmc->chws[PMC_MAIN] = hw; 101 102 hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, 103 &at91rm9200_pll_layout, 104 &sam9rl_plla_characteristics); 105 if (IS_ERR(hw)) 106 goto err_free; 107 108 hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck"); 109 if (IS_ERR(hw)) 110 goto err_free; 111 112 at91sam9rl_pmc->chws[PMC_UTMI] = hw; 113 114 parent_names[0] = slck_name; 115 parent_names[1] = "mainck"; 116 parent_names[2] = "pllack"; 117 parent_names[3] = "utmick"; 118 hw = at91_clk_register_master(regmap, "masterck", 4, parent_names, 119 &at91rm9200_master_layout, 120 &sam9rl_mck_characteristics); 121 if (IS_ERR(hw)) 122 goto err_free; 123 124 at91sam9rl_pmc->chws[PMC_MCK] = hw; 125 126 parent_names[0] = slck_name; 127 parent_names[1] = "mainck"; 128 parent_names[2] = "pllack"; 129 parent_names[3] = "utmick"; 130 parent_names[4] = "masterck"; 131 for (i = 0; i < 2; i++) { 132 char name[6]; 133 134 snprintf(name, sizeof(name), "prog%d", i); 135 136 hw = at91_clk_register_programmable(regmap, name, 137 parent_names, 5, i, 138 &at91rm9200_programmable_layout); 139 if (IS_ERR(hw)) 140 goto err_free; 141 } 142 143 for (i = 0; i < ARRAY_SIZE(at91sam9rl_systemck); i++) { 144 hw = at91_clk_register_system(regmap, at91sam9rl_systemck[i].n, 145 at91sam9rl_systemck[i].p, 146 at91sam9rl_systemck[i].id); 147 if (IS_ERR(hw)) 148 goto err_free; 149 150 at91sam9rl_pmc->shws[at91sam9rl_systemck[i].id] = hw; 151 } 152 153 for (i = 0; i < ARRAY_SIZE(at91sam9rl_periphck); i++) { 154 hw = at91_clk_register_peripheral(regmap, 155 at91sam9rl_periphck[i].n, 156 "masterck", 157 at91sam9rl_periphck[i].id); 158 if (IS_ERR(hw)) 159 goto err_free; 160 161 at91sam9rl_pmc->phws[at91sam9rl_periphck[i].id] = hw; 162 } 163 164 of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9rl_pmc); 165 166 return; 167 168 err_free: 169 pmc_data_free(at91sam9rl_pmc); 170 } 171 CLK_OF_DECLARE_DRIVER(at91sam9rl_pmc, "atmel,at91sam9rl-pmc", at91sam9rl_pmc_setup); 172