diff options
Diffstat (limited to 'drivers/clk/at91/at91sam9x5.c')
| -rw-r--r-- | drivers/clk/at91/at91sam9x5.c | 73 |
1 files changed, 46 insertions, 27 deletions
diff --git a/drivers/clk/at91/at91sam9x5.c b/drivers/clk/at91/at91sam9x5.c index 0ce3da080287..3b801d12fac0 100644 --- a/drivers/clk/at91/at91sam9x5.c +++ b/drivers/clk/at91/at91sam9x5.c @@ -7,6 +7,8 @@ #include "pmc.h" +static DEFINE_SPINLOCK(mck_lock); + static const struct clk_master_characteristics mck_characteristics = { .output = { .min = 0, .max = 133333333 }, .divisors = { 1, 2, 4, 3 }, @@ -39,9 +41,14 @@ static const struct clk_pll_characteristics plla_characteristics = { static const struct { char *n; char *p; + unsigned long flags; u8 id; } at91sam9x5_systemck[] = { - { .n = "ddrck", .p = "masterck", .id = 2 }, + /* + * 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 = "smdck", .p = "smdclk", .id = 4 }, { .n = "uhpck", .p = "usbck", .id = 6 }, { .n = "udpck", .p = "usbck", .id = 7 }, @@ -162,14 +169,14 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np, bypass = of_property_read_bool(np, "atmel,osc-bypass"); - hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, 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); + hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); if (IS_ERR(hw)) goto err_free; @@ -186,7 +193,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np, at91sam9x5_pmc->chws[PMC_PLLACK] = hw; - hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck"); + hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL); if (IS_ERR(hw)) goto err_free; @@ -196,9 +203,18 @@ static void __init at91sam9x5_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, - &at91sam9x5_master_layout, - &mck_characteristics); + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock, + CLK_SET_RATE_GATE, 0); if (IS_ERR(hw)) goto err_free; @@ -218,15 +234,16 @@ static void __init at91sam9x5_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[6]; snprintf(name, sizeof(name), "prog%d", i); hw = at91_clk_register_programmable(regmap, name, - parent_names, 5, i, - &at91sam9x5_programmable_layout); + parent_names, NULL, 5, i, + &at91sam9x5_programmable_layout, + NULL); if (IS_ERR(hw)) goto err_free; @@ -235,8 +252,9 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np, for (i = 0; i < ARRAY_SIZE(at91sam9x5_systemck); i++) { hw = at91_clk_register_system(regmap, at91sam9x5_systemck[i].n, - at91sam9x5_systemck[i].p, - at91sam9x5_systemck[i].id); + at91sam9x5_systemck[i].p, NULL, + at91sam9x5_systemck[i].id, + at91sam9x5_systemck[i].flags); if (IS_ERR(hw)) goto err_free; @@ -244,7 +262,8 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np, } if (has_lcdck) { - hw = at91_clk_register_system(regmap, "lcdck", "masterck", 3); + hw = at91_clk_register_system(regmap, "lcdck", "masterck_div", + NULL, 3, 0); if (IS_ERR(hw)) goto err_free; @@ -255,9 +274,9 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np, hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, &at91sam9x5_pcr_layout, at91sam9x5_periphck[i].n, - "masterck", + "masterck_div", NULL, at91sam9x5_periphck[i].id, - &range); + &range, INT_MIN, 0); if (IS_ERR(hw)) goto err_free; @@ -268,9 +287,9 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np, hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, &at91sam9x5_pcr_layout, extra_pcks[i].n, - "masterck", + "masterck_div", NULL, extra_pcks[i].id, - &range); + &range, INT_MIN, 0); if (IS_ERR(hw)) goto err_free; @@ -289,33 +308,33 @@ static void __init at91sam9g15_pmc_setup(struct device_node *np) { at91sam9x5_pmc_setup(np, at91sam9g15_periphck, true); } -CLK_OF_DECLARE_DRIVER(at91sam9g15_pmc, "atmel,at91sam9g15-pmc", - at91sam9g15_pmc_setup); + +CLK_OF_DECLARE(at91sam9g15_pmc, "atmel,at91sam9g15-pmc", at91sam9g15_pmc_setup); static void __init at91sam9g25_pmc_setup(struct device_node *np) { at91sam9x5_pmc_setup(np, at91sam9g25_periphck, false); } -CLK_OF_DECLARE_DRIVER(at91sam9g25_pmc, "atmel,at91sam9g25-pmc", - at91sam9g25_pmc_setup); + +CLK_OF_DECLARE(at91sam9g25_pmc, "atmel,at91sam9g25-pmc", at91sam9g25_pmc_setup); static void __init at91sam9g35_pmc_setup(struct device_node *np) { at91sam9x5_pmc_setup(np, at91sam9g35_periphck, true); } -CLK_OF_DECLARE_DRIVER(at91sam9g35_pmc, "atmel,at91sam9g35-pmc", - at91sam9g35_pmc_setup); + +CLK_OF_DECLARE(at91sam9g35_pmc, "atmel,at91sam9g35-pmc", at91sam9g35_pmc_setup); static void __init at91sam9x25_pmc_setup(struct device_node *np) { at91sam9x5_pmc_setup(np, at91sam9x25_periphck, false); } -CLK_OF_DECLARE_DRIVER(at91sam9x25_pmc, "atmel,at91sam9x25-pmc", - at91sam9x25_pmc_setup); + +CLK_OF_DECLARE(at91sam9x25_pmc, "atmel,at91sam9x25-pmc", at91sam9x25_pmc_setup); static void __init at91sam9x35_pmc_setup(struct device_node *np) { at91sam9x5_pmc_setup(np, at91sam9x35_periphck, true); } -CLK_OF_DECLARE_DRIVER(at91sam9x35_pmc, "atmel,at91sam9x35-pmc", - at91sam9x35_pmc_setup); + +CLK_OF_DECLARE(at91sam9x35_pmc, "atmel,at91sam9x35-pmc", at91sam9x35_pmc_setup); |