From 12dc8d3be9d86cccc35dcf32828d3a8e9d48e0d1 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Fri, 17 Jan 2020 22:05:29 +0100 Subject: clk: at91: add at91sam9g45 pmc driver Add a driver for the PMC clocks of the at91sam9g45 family. Signed-off-by: Alexandre Belloni Link: https://lkml.kernel.org/r/20200117210529.17490-1-alexandre.belloni@bootlin.com Signed-off-by: Stephen Boyd --- drivers/clk/at91/Makefile | 1 + drivers/clk/at91/at91sam9g45.c | 220 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 221 insertions(+) create mode 100644 drivers/clk/at91/at91sam9g45.c (limited to 'drivers/clk/at91') diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile index 3732241352ce..c02c53a0e02e 100644 --- a/drivers/clk/at91/Makefile +++ b/drivers/clk/at91/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_HAVE_AT91_GENERATED_CLK) += clk-generated.o obj-$(CONFIG_HAVE_AT91_I2S_MUX_CLK) += clk-i2s-mux.o obj-$(CONFIG_HAVE_AT91_SAM9X60_PLL) += clk-sam9x60-pll.o obj-$(CONFIG_SOC_AT91SAM9) += at91sam9260.o at91sam9rl.o at91sam9x5.o +obj-$(CONFIG_SOC_AT91SAM9) += at91sam9g45.o obj-$(CONFIG_SOC_SAM9X60) += sam9x60.o obj-$(CONFIG_SOC_SAMA5D4) += sama5d4.o obj-$(CONFIG_SOC_SAMA5D2) += sama5d2.o diff --git a/drivers/clk/at91/at91sam9g45.c b/drivers/clk/at91/at91sam9g45.c new file mode 100644 index 000000000000..38a7d2d2df0c --- /dev/null +++ b/drivers/clk/at91/at91sam9g45.c @@ -0,0 +1,220 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include + +#include + +#include "pmc.h" + +static const struct clk_master_characteristics mck_characteristics = { + .output = { .min = 0, .max = 133333333 }, + .divisors = { 1, 2, 4, 3 }, +}; + +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 const struct { + char *n; + char *p; + u8 id; +} at91sam9g45_systemck[] = { + { .n = "ddrck", .p = "masterck", .id = 2 }, + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, +}; + +static const struct clk_pcr_layout at91sam9g45_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 at91sam9g45_periphck[] = { + { .n = "pioA_clk", .id = 2, }, + { .n = "pioB_clk", .id = 3, }, + { .n = "pioC_clk", .id = 4, }, + { .n = "pioDE_clk", .id = 5, }, + { .n = "trng_clk", .id = 6, }, + { .n = "usart0_clk", .id = 7, }, + { .n = "usart1_clk", .id = 8, }, + { .n = "usart2_clk", .id = 9, }, + { .n = "usart3_clk", .id = 10, }, + { .n = "mci0_clk", .id = 11, }, + { .n = "twi0_clk", .id = 12, }, + { .n = "twi1_clk", .id = 13, }, + { .n = "spi0_clk", .id = 14, }, + { .n = "spi1_clk", .id = 15, }, + { .n = "ssc0_clk", .id = 16, }, + { .n = "ssc1_clk", .id = 17, }, + { .n = "tcb0_clk", .id = 18, }, + { .n = "pwm_clk", .id = 19, }, + { .n = "adc_clk", .id = 20, }, + { .n = "dma0_clk", .id = 21, }, + { .n = "uhphs_clk", .id = 22, }, + { .n = "lcd_clk", .id = 23, }, + { .n = "ac97_clk", .id = 24, }, + { .n = "macb0_clk", .id = 25, }, + { .n = "isi_clk", .id = 26, }, + { .n = "udphs_clk", .id = 27, }, + { .n = "aestdessha_clk", .id = 28, }, + { .n = "mci1_clk", .id = 29, }, + { .n = "vdec_clk", .id = 30, }, +}; + +static void __init at91sam9g45_pmc_setup(struct device_node *np) +{ + const char *slck_name, *mainxtal_name; + struct pmc_data *at91sam9g45_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 = syscon_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + at91sam9g45_pmc = pmc_data_allocate(PMC_MAIN + 1, + nck(at91sam9g45_systemck), + nck(at91sam9g45_periphck), 0); + if (!at91sam9g45_pmc) + return; + + 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; + + hw = at91_clk_register_rm9200_main(regmap, "mainck", "main_osc"); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_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; + + hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck"); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->chws[PMC_UTMI] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + hw = at91_clk_register_master(regmap, "masterck", 4, parent_names, + &at91rm9200_master_layout, + &mck_characteristics); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->chws[PMC_MCK] = hw; + + parent_names[0] = "plladivck"; + parent_names[1] = "utmick"; + hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + 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, + &at91sam9g45_programmable_layout); + if (IS_ERR(hw)) + goto err_free; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9g45_systemck); i++) { + hw = at91_clk_register_system(regmap, at91sam9g45_systemck[i].n, + at91sam9g45_systemck[i].p, + at91sam9g45_systemck[i].id); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->shws[at91sam9g45_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9g45_periphck); i++) { + hw = at91_clk_register_peripheral(regmap, + at91sam9g45_periphck[i].n, + "masterck", + at91sam9g45_periphck[i].id); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->phws[at91sam9g45_periphck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9g45_pmc); + + return; + +err_free: + pmc_data_free(at91sam9g45_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_DRIVER(at91sam9g45_pmc, "atmel,at91sam9g45-pmc", + at91sam9g45_pmc_setup); -- cgit v1.2.3