// SPDX-License-Identifier: GPL-2.0-only #include #include #include #include #include #include "pmc.h" static DEFINE_SPINLOCK(at91sam9n12_mck_lock); static const struct clk_master_characteristics mck_characteristics = { .output = { .min = 0, .max = 133333333 }, .divisors = { 1, 2, 4, 3 }, .have_div3_pres = 1, }; static u8 plla_out[] = { 0, 1, 2, 3, 0, 1, 2, 3 }; static u16 plla_icpll[] = { 0, 0, 0, 0, 1, 1, 1, 1 }; static const struct clk_range plla_outputs[] = { { .min = 745000000, .max = 800000000 }, { .min = 695000000, .max = 750000000 }, { .min = 645000000, .max = 700000000 }, { .min = 595000000, .max = 650000000 }, { .min = 545000000, .max = 600000000 }, { .min = 495000000, .max = 555000000 }, { .min = 445000000, .max = 500000000 }, { .min = 400000000, .max = 450000000 }, }; static const struct clk_pll_characteristics plla_characteristics = { .input = { .min = 2000000, .max = 32000000 }, .num_output = ARRAY_SIZE(plla_outputs), .output = plla_outputs, .icpll = plla_icpll, .out = plla_out, }; static u8 pllb_out[] = { 0 }; static const struct clk_range pllb_outputs[] = { { .min = 30000000, .max = 100000000 }, }; static const struct clk_pll_characteristics pllb_characteristics = { .input = { .min = 2000000, .max = 32000000 }, .num_output = ARRAY_SIZE(pllb_outputs), .output = pllb_outputs, .out = pllb_out, }; static const struct { char *n; char *p; unsigned long flags; u8 id; } at91sam9n12_systemck[] = { /* * ddrck feeds DDR controller and is enabled by bootloader thus we need * to keep it enabled in case there is no Linux consumer for it. */ { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, { .n = "lcdck", .p = "masterck_div", .id = 3 }, { .n = "uhpck", .p = "usbck", .id = 6 }, { .n = "udpck", .p = "usbck", .id = 7 }, { .n = "pck0", .p = "prog0", .id = 8 }, { .n = "pck1", .p = "prog1", .id = 9 }, }; static const struct clk_pcr_layout at91sam9n12_pcr_layout = { .offset = 0x10c, .cmd = BIT(12), .pid_mask = GENMASK(5, 0), .div_mask = GENMASK(17, 16), }; struct pck { char *n; u8 id; }; static const struct pck at91sam9n12_periphck[] = { { .n = "pioAB_clk", .id = 2, }, { .n = "pioCD_clk", .id = 3, }, { .n = "fuse_clk", .id = 4, }, { .n = "usart0_clk", .id = 5, }, { .n = "usart1_clk", .id = 6, }, { .n = "usart2_clk", .id = 7, }, { .n = "usart3_clk", .id = 8, }, { .n = "twi0_clk", .id = 9, }, { .n = "twi1_clk", .id = 10, }, { .n = "mci0_clk", .id = 12, }, { .n = "spi0_clk", .id = 13, }, { .n = "spi1_clk", .id = 14, }, { .n = "uart0_clk", .id = 15, }, { .n = "uart1_clk", .id = 16, }, { .n = "tcb_clk", .id = 17, }, { .n = "pwm_clk", .id = 18, }, { .n = "adc_clk", .id = 19, }, { .n = "dma0_clk", .id = 20, }, { .n = "uhphs_clk", .id = 22, }, { .n = "udphs_clk", .id = 23, }, { .n = "lcdc_clk", .id = 25, }, { .n = "sha_clk", .id = 27, }, { .n = "ssc0_clk", .id = 28, }, { .n = "aes_clk", .id = 29, }, { .n = "trng_clk", .id = 30, }, }; static void __init at91sam9n12_pmc_setup(struct device_node *np) { struct clk_range range = CLK_RANGE(0, 0); const char *slck_name, *mainxtal_name; struct pmc_data *at91sam9n12_pmc; const char *parent_names[6]; struct regmap *regmap; struct clk_hw *hw; int i; bool bypass; 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 = device_node_to_regmap(np); if (IS_ERR(regmap)) return; at91sam9n12_pmc = pmc_data_allocate(PMC_PLLBCK + 1, nck(at91sam9n12_systemck), 31, 0, 2); if (!at91sam9n12_pmc) return; hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, 50000000); if (IS_ERR(hw)) goto err_free; bypass = of_property_read_bool(np, "atmel,osc-bypass"); hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, bypass); if (IS_ERR(hw)) goto err_free; parent_names[0] = "main_rc_osc"; parent_names[1] = "main_osc"; hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2); if (IS_ERR(hw)) goto err_free; at91sam9n12_pmc->chws[PMC_MAIN] = hw; hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, &at91rm9200_pll_layout, &plla_characteristics); if (IS_ERR(hw)) goto err_free; hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack"); if (IS_ERR(hw)) goto err_free; at91sam9n12_pmc->chws[PMC_PLLACK] = hw; hw = at91_clk_register_pll(regmap, "pllbck", "mainck", 1, &at91rm9200_pll_layout, &pllb_characteristics); if (IS_ERR(hw)) goto err_free; at91sam9n12_pmc->chws[PMC_PLLBCK] = hw; parent_names[0] = slck_name; parent_names[1] = "mainck"; parent_names[2] = "plladivck"; parent_names[3] = "pllbck"; hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, parent_names, &at91sam9x5_master_layout, &mck_characteristics, &at91sam9n12_mck_lock); if (IS_ERR(hw)) goto err_free; hw = at91_clk_register_master_div(regmap, "masterck_div", "masterck_pres", &at91sam9x5_master_layout, &mck_characteristics, &at91sam9n12_mck_lock, CLK_SET_RATE_GATE); if (IS_ERR(hw)) goto err_free; at91sam9n12_pmc->chws[PMC_MCK] = hw; hw = at91sam9n12_clk_register_usb(regmap, "usbck", "pllbck"); if (IS_ERR(hw)) goto err_free; parent_names[0] = slck_name; parent_names[1] = "mainck"; parent_names[2] = "plladivck"; parent_names[3] = "pllbck"; parent_names[4] = "masterck_div"; 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, &at91sam9x5_programmable_layout, NULL); if (IS_ERR(hw)) goto err_free; at91sam9n12_pmc->pchws[i] = hw; } for (i = 0; i < ARRAY_SIZE(at91sam9n12_systemck); i++) { hw = at91_clk_register_system(regmap, at91sam9n12_systemck[i].n, at91sam9n12_systemck[i].p, at91sam9n12_systemck[i].id, at91sam9n12_systemck[i].flags); if (IS_ERR(hw)) goto err_free; at91sam9n12_pmc->shws[at91sam9n12_systemck[i].id] = hw; } for (i = 0; i < ARRAY_SIZE(at91sam9n12_periphck); i++) { hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, &at91sam9n12_pcr_layout, at91sam9n12_periphck[i].n, "masterck_div", at91sam9n12_periphck[i].id, &range, INT_MIN, 0); if (IS_ERR(hw)) goto err_free; at91sam9n12_pmc->phws[at91sam9n12_periphck[i].id] = hw; } of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9n12_pmc); return; err_free: kfree(at91sam9n12_pmc); } /* * The TCB is used as the clocksource so its clock is needed early. This means * this can't be a platform driver. */ CLK_OF_DECLARE(at91sam9n12_pmc, "atmel,at91sam9n12-pmc", at91sam9n12_pmc_setup);