// SPDX-License-Identifier: GPL-2.0 #include <linux/clk-provider.h> #include <linux/mfd/syscon.h> #include <linux/slab.h> #include <dt-bindings/clock/at91.h> #include "pmc.h" static const struct clk_master_characteristics sam9rl_mck_characteristics = { .output = { .min = 0, .max = 94000000 }, .divisors = { 1, 2, 4, 0 }, }; static u8 sam9rl_plla_out[] = { 0, 2 }; static const struct clk_range sam9rl_plla_outputs[] = { { .min = 80000000, .max = 200000000 }, { .min = 190000000, .max = 240000000 }, }; static const struct clk_pll_characteristics sam9rl_plla_characteristics = { .input = { .min = 1000000, .max = 32000000 }, .num_output = ARRAY_SIZE(sam9rl_plla_outputs), .output = sam9rl_plla_outputs, .out = sam9rl_plla_out, }; static const struct { char *n; char *p; u8 id; } at91sam9rl_systemck[] = { { .n = "pck0", .p = "prog0", .id = 8 }, { .n = "pck1", .p = "prog1", .id = 9 }, }; static const struct { char *n; u8 id; } at91sam9rl_periphck[] = { { .n = "pioA_clk", .id = 2, }, { .n = "pioB_clk", .id = 3, }, { .n = "pioC_clk", .id = 4, }, { .n = "pioD_clk", .id = 5, }, { .n = "usart0_clk", .id = 6, }, { .n = "usart1_clk", .id = 7, }, { .n = "usart2_clk", .id = 8, }, { .n = "usart3_clk", .id = 9, }, { .n = "mci0_clk", .id = 10, }, { .n = "twi0_clk", .id = 11, }, { .n = "twi1_clk", .id = 12, }, { .n = "spi0_clk", .id = 13, }, { .n = "ssc0_clk", .id = 14, }, { .n = "ssc1_clk", .id = 15, }, { .n = "tc0_clk", .id = 16, }, { .n = "tc1_clk", .id = 17, }, { .n = "tc2_clk", .id = 18, }, { .n = "pwm_clk", .id = 19, }, { .n = "adc_clk", .id = 20, }, { .n = "dma0_clk", .id = 21, }, { .n = "udphs_clk", .id = 22, }, { .n = "lcd_clk", .id = 23, }, }; static void __init at91sam9rl_pmc_setup(struct device_node *np) { const char *slck_name, *mainxtal_name; struct pmc_data *at91sam9rl_pmc; const char *parent_names[6]; struct regmap *regmap; struct clk_hw *hw; int i; i = of_property_match_string(np, "clock-names", "slow_clk"); if (i < 0) return; slck_name = of_clk_get_parent_name(np, i); i = of_property_match_string(np, "clock-names", "main_xtal"); if (i < 0) return; mainxtal_name = of_clk_get_parent_name(np, i); regmap = syscon_node_to_regmap(np); if (IS_ERR(regmap)) return; at91sam9rl_pmc = pmc_data_allocate(PMC_MAIN + 1, nck(at91sam9rl_systemck), nck(at91sam9rl_periphck), 0); if (!at91sam9rl_pmc) return; hw = at91_clk_register_rm9200_main(regmap, "mainck", mainxtal_name); if (IS_ERR(hw)) goto err_free; at91sam9rl_pmc->chws[PMC_MAIN] = hw; hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, &at91rm9200_pll_layout, &sam9rl_plla_characteristics); if (IS_ERR(hw)) goto err_free; hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck"); if (IS_ERR(hw)) goto err_free; at91sam9rl_pmc->chws[PMC_UTMI] = hw; parent_names[0] = slck_name; parent_names[1] = "mainck"; parent_names[2] = "pllack"; parent_names[3] = "utmick"; hw = at91_clk_register_master(regmap, "masterck", 4, parent_names, &at91rm9200_master_layout, &sam9rl_mck_characteristics); if (IS_ERR(hw)) goto err_free; at91sam9rl_pmc->chws[PMC_MCK] = hw; parent_names[0] = slck_name; parent_names[1] = "mainck"; parent_names[2] = "pllack"; parent_names[3] = "utmick"; parent_names[4] = "masterck"; for (i = 0; i < 2; i++) { char name[6]; snprintf(name, sizeof(name), "prog%d", i); hw = at91_clk_register_programmable(regmap, name, parent_names, 5, i, &at91rm9200_programmable_layout); if (IS_ERR(hw)) goto err_free; } for (i = 0; i < ARRAY_SIZE(at91sam9rl_systemck); i++) { hw = at91_clk_register_system(regmap, at91sam9rl_systemck[i].n, at91sam9rl_systemck[i].p, at91sam9rl_systemck[i].id); if (IS_ERR(hw)) goto err_free; at91sam9rl_pmc->shws[at91sam9rl_systemck[i].id] = hw; } for (i = 0; i < ARRAY_SIZE(at91sam9rl_periphck); i++) { hw = at91_clk_register_peripheral(regmap, at91sam9rl_periphck[i].n, "masterck", at91sam9rl_periphck[i].id); if (IS_ERR(hw)) goto err_free; at91sam9rl_pmc->phws[at91sam9rl_periphck[i].id] = hw; } of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9rl_pmc); return; err_free: pmc_data_free(at91sam9rl_pmc); } CLK_OF_DECLARE_DRIVER(at91sam9rl_pmc, "atmel,at91sam9rl-pmc", at91sam9rl_pmc_setup);