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Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/cpu/armv7/exynos/clock.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
index 59d7dc87bd..0153314b45 100644
--- a/arch/arm/cpu/armv7/exynos/clock.c
+++ b/arch/arm/cpu/armv7/exynos/clock.c
@@ -362,8 +362,8 @@ static struct clk_bit_info *get_clk_bit_info(int peripheral)
static unsigned long exynos5_get_periph_rate(int peripheral)
{
struct clk_bit_info *bit_info = get_clk_bit_info(peripheral);
- unsigned long sclk, sub_clk;
- unsigned int src, div, sub_div;
+ unsigned long sclk, sub_clk = 0;
+ unsigned int src, div, sub_div = 0;
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
@@ -402,10 +402,13 @@ static unsigned long exynos5_get_periph_rate(int peripheral)
break;
case PERIPH_ID_SDMMC0:
case PERIPH_ID_SDMMC1:
+ src = readl(&clk->src_fsys);
+ div = readl(&clk->div_fsys1);
+ break;
case PERIPH_ID_SDMMC2:
case PERIPH_ID_SDMMC3:
src = readl(&clk->src_fsys);
- div = readl(&clk->div_fsys1);
+ div = readl(&clk->div_fsys2);
break;
case PERIPH_ID_I2C0:
case PERIPH_ID_I2C1:
@@ -426,7 +429,8 @@ static unsigned long exynos5_get_periph_rate(int peripheral)
return -1;
};
- src = (src >> bit_info->src_bit) & 0xf;
+ if (bit_info->src_bit >= 0)
+ src = (src >> bit_info->src_bit) & 0xf;
switch (src) {
case EXYNOS_SRC_MPLL:
@@ -443,11 +447,12 @@ static unsigned long exynos5_get_periph_rate(int peripheral)
}
/* Ratio clock division for this peripheral */
- sub_div = (div >> bit_info->div_bit) & 0xf;
- sub_clk = sclk / (sub_div + 1);
+ if (bit_info->div_bit >= 0) {
+ sub_div = (div >> bit_info->div_bit) & 0xf;
+ sub_clk = sclk / (sub_div + 1);
+ }
- /* Pre-ratio clock division for SDMMC0 and 2 */
- if (peripheral == PERIPH_ID_SDMMC0 || peripheral == PERIPH_ID_SDMMC2) {
+ if (bit_info->prediv_bit >= 0) {
div = (div >> bit_info->prediv_bit) & 0xff;
return sub_clk / (div + 1);
}