diff options
| author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2022-12-08 13:45:13 +0200 |
|---|---|---|
| committer | Claudiu Beznea <claudiu.beznea@microchip.com> | 2023-01-09 14:05:41 +0200 |
| commit | 68b3b6f1773d2d1f8f58da7149e739213a3ed038 (patch) | |
| tree | 03df1c536a3a18a366800ba22cba6e6480482d5b /drivers/clk/at91/at91sam9x5.c | |
| parent | 1b929c02afd37871d5afb9d498426f83432e71c2 (diff) | |
clk: at91: mark ddr clocks as critical
Mark DDR clocks as critical for AT91 devices. These clocks are enabled
by bootloader when initializing DDR and needs to stay enabled. Up to
this patch the DDR clocks were requested from drivers/memory/atmel-sdramc.c
which does only clock request and enable. There is no need to have
a separate driver just for this, thus the atmel-sdramc.c will be deleted
in a subsequent patch.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20221208114515.35179-2-claudiu.beznea@microchip.com
Diffstat (limited to 'drivers/clk/at91/at91sam9x5.c')
| -rw-r--r-- | drivers/clk/at91/at91sam9x5.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/clk/at91/at91sam9x5.c b/drivers/clk/at91/at91sam9x5.c index 3857db2e144b..13e589c95907 100644 --- a/drivers/clk/at91/at91sam9x5.c +++ b/drivers/clk/at91/at91sam9x5.c @@ -41,9 +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_div", .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 }, @@ -248,7 +253,8 @@ 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].id, + at91sam9x5_systemck[i].flags); if (IS_ERR(hw)) goto err_free; @@ -256,7 +262,8 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np, } if (has_lcdck) { - hw = at91_clk_register_system(regmap, "lcdck", "masterck_div", 3); + hw = at91_clk_register_system(regmap, "lcdck", "masterck_div", + 3, 0); if (IS_ERR(hw)) goto err_free; @@ -269,7 +276,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np, at91sam9x5_periphck[i].n, "masterck_div", at91sam9x5_periphck[i].id, - &range, INT_MIN); + &range, INT_MIN, 0); if (IS_ERR(hw)) goto err_free; @@ -282,7 +289,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np, extra_pcks[i].n, "masterck_div", extra_pcks[i].id, - &range, INT_MIN); + &range, INT_MIN, 0); if (IS_ERR(hw)) goto err_free; |