diff options
Diffstat (limited to 'drivers/clk/at91/sama5d3.c')
| -rw-r--r-- | drivers/clk/at91/sama5d3.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/clk/at91/sama5d3.c b/drivers/clk/at91/sama5d3.c index 7e93c6edf305..ad6068b884de 100644 --- a/drivers/clk/at91/sama5d3.c +++ b/drivers/clk/at91/sama5d3.c @@ -40,9 +40,14 @@ static const struct clk_pcr_layout sama5d3_pcr_layout = { static const struct { char *n; char *p; + unsigned long flags; u8 id; } sama5d3_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 = "smdck", .p = "smdclk", .id = 4 }, { .n = "uhpck", .p = "usbck", .id = 6 }, @@ -56,6 +61,7 @@ static const struct { char *n; u8 id; struct clk_range r; + unsigned long flags; } sama5d3_periphck[] = { { .n = "dbgu_clk", .id = 2, }, { .n = "hsmc_clk", .id = 5, }, @@ -99,7 +105,11 @@ static const struct { { .n = "tdes_clk", .id = 44, }, { .n = "trng_clk", .id = 45, }, { .n = "fuse_clk", .id = 48, }, - { .n = "mpddr_clk", .id = 49, }, + /* + * 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 = 49, .flags = CLK_IS_CRITICAL }, }; static void __init sama5d3_pmc_setup(struct device_node *np) @@ -222,7 +232,8 @@ static void __init sama5d3_pmc_setup(struct device_node *np) for (i = 0; i < ARRAY_SIZE(sama5d3_systemck); i++) { hw = at91_clk_register_system(regmap, sama5d3_systemck[i].n, sama5d3_systemck[i].p, - sama5d3_systemck[i].id); + sama5d3_systemck[i].id, + sama5d3_systemck[i].flags); if (IS_ERR(hw)) goto err_free; @@ -236,7 +247,8 @@ static void __init sama5d3_pmc_setup(struct device_node *np) "masterck_div", sama5d3_periphck[i].id, &sama5d3_periphck[i].r, - INT_MIN); + INT_MIN, + sama5d3_periphck[i].flags); if (IS_ERR(hw)) goto err_free; |