diff options
Diffstat (limited to 'drivers/clk/at91/at91sam9g45.c')
| -rw-r--r-- | drivers/clk/at91/at91sam9g45.c | 64 |
1 files changed, 40 insertions, 24 deletions
diff --git a/drivers/clk/at91/at91sam9g45.c b/drivers/clk/at91/at91sam9g45.c index a00a6a4342..fedf961393 100644 --- a/drivers/clk/at91/at91sam9g45.c +++ b/drivers/clk/at91/at91sam9g45.c @@ -1,18 +1,15 @@ -// SPDX-License-Identifier: GPL-2.0 - -#include <driver.h> -#include <regmap.h> -#include <stdio.h> +// SPDX-License-Identifier: GPL-2.0-only +#include <linux/clk-provider.h> #include <mfd/syscon.h> - -#include <linux/clk.h> #include <linux/slab.h> -#include <linux/types.h> +#include <stdio.h> #include <dt-bindings/clock/at91.h> #include "pmc.h" +static DEFINE_SPINLOCK(at91sam9g45_mck_lock); + static const struct clk_master_characteristics mck_characteristics = { .output = { .min = 0, .max = 133333333 }, .divisors = { 1, 2, 4, 3 }, @@ -44,12 +41,17 @@ static const struct clk_pll_characteristics plla_characteristics = { static const struct { char *n; char *p; + unsigned long flags; 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 }, + /* + * 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 = "uhpck", .p = "usbck", .id = 6 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, }; struct pck { @@ -95,7 +97,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np) struct pmc_data *at91sam9g45_pmc; const char *parent_names[6]; struct regmap *regmap; - struct clk *hw; + struct clk_hw *hw; int i; bool bypass; @@ -154,9 +156,20 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np) 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); + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, + &at91rm9200_master_layout, + &mck_characteristics, + &at91sam9g45_mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", + &at91rm9200_master_layout, + &mck_characteristics, + &at91sam9g45_mck_lock, + CLK_SET_RATE_GATE); if (IS_ERR(hw)) goto err_free; @@ -172,13 +185,16 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np) parent_names[1] = "mainck"; parent_names[2] = "plladivck"; parent_names[3] = "utmick"; - parent_names[4] = "masterck"; + parent_names[4] = "masterck_div"; for (i = 0; i < 2; i++) { - char *name = xasprintf("prog%d", 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); + &at91sam9g45_programmable_layout, + NULL); if (IS_ERR(hw)) goto err_free; @@ -188,7 +204,8 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np) 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); + at91sam9g45_systemck[i].id, + at91sam9g45_systemck[i].flags); if (IS_ERR(hw)) goto err_free; @@ -198,7 +215,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np) for (i = 0; i < ARRAY_SIZE(at91sam9g45_periphck); i++) { hw = at91_clk_register_peripheral(regmap, at91sam9g45_periphck[i].n, - "masterck", + "masterck_div", at91sam9g45_periphck[i].id); if (IS_ERR(hw)) goto err_free; @@ -206,7 +223,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np) at91sam9g45_pmc->phws[at91sam9g45_periphck[i].id] = hw; } - of_clk_add_provider(np, of_clk_hw_pmc_get, at91sam9g45_pmc); + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9g45_pmc); return; @@ -217,5 +234,4 @@ err_free: * 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); +CLK_OF_DECLARE(at91sam9g45_pmc, "atmel,at91sam9g45-pmc", at91sam9g45_pmc_setup); |