diff options
Diffstat (limited to 'drivers/clk/at91/sama5d2.c')
| -rw-r--r-- | drivers/clk/at91/sama5d2.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c index 84156dc52bff..c0e3e1a4bbf3 100644 --- a/drivers/clk/at91/sama5d2.c +++ b/drivers/clk/at91/sama5d2.c @@ -40,9 +40,14 @@ static const struct clk_pcr_layout sama5d2_pcr_layout = { static const struct { char *n; char *p; + unsigned long flags; u8 id; } sama5d2_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 = "lcdck", .p = "masterck_div", .id = 3 }, { .n = "uhpck", .p = "usbck", .id = 6 }, { .n = "udpck", .p = "usbck", .id = 7 }, @@ -97,6 +102,7 @@ static const struct { static const struct { char *n; + unsigned long flags; u8 id; } sama5d2_periphck[] = { { .n = "dma0_clk", .id = 6, }, @@ -104,7 +110,11 @@ static const struct { { .n = "aes_clk", .id = 9, }, { .n = "aesb_clk", .id = 10, }, { .n = "sha_clk", .id = 12, }, - { .n = "mpddr_clk", .id = 13, }, + /* + * mpddr_clk 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 = "mpddr_clk", .id = 13, .flags = CLK_IS_CRITICAL }, { .n = "matrix0_clk", .id = 15, }, { .n = "sdmmc0_hclk", .id = 31, }, { .n = "sdmmc1_hclk", .id = 32, }, @@ -302,7 +312,8 @@ static void __init sama5d2_pmc_setup(struct device_node *np) for (i = 0; i < ARRAY_SIZE(sama5d2_systemck); i++) { hw = at91_clk_register_system(regmap, sama5d2_systemck[i].n, sama5d2_systemck[i].p, - sama5d2_systemck[i].id); + sama5d2_systemck[i].id, + sama5d2_systemck[i].flags); if (IS_ERR(hw)) goto err_free; @@ -315,7 +326,8 @@ static void __init sama5d2_pmc_setup(struct device_node *np) sama5d2_periphck[i].n, "masterck_div", sama5d2_periphck[i].id, - &range, INT_MIN); + &range, INT_MIN, + sama5d2_periphck[i].flags); if (IS_ERR(hw)) goto err_free; @@ -329,7 +341,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np) "h32mxck", sama5d2_periph32ck[i].id, &sama5d2_periph32ck[i].r, - INT_MIN); + INT_MIN, 0); if (IS_ERR(hw)) goto err_free; |