diff options
| author | Jaehoon Chung <jh80.chung@samsung.com> | 2014-05-16 13:59:50 +0900 |
|---|---|---|
| committer | Minkyu Kang <mk7.kang@samsung.com> | 2014-05-16 14:54:26 +0900 |
| commit | 39c49756221b53f2672452bef1f4b00a8dbad49c (patch) | |
| tree | 06f90ba206bfb34660ad30a15eb440f5ccc77c30 /arch/arm | |
| parent | 58209dfaced619a53581c4d66d9791ce8316e0d5 (diff) | |
ARM: exynos: clock: modify the set_mmc_clk for exynos4
Modified the mmc_set_clock for eynos4.
The goal of this patch is that fsys-div register should be reset.
And retore the div-value, not using the value of lowlevel_init.
(For using SDMMC4, this patch is needs)
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv7/exynos/clock.c | 16 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-exynos/clk.h | 5 |
2 files changed, 16 insertions, 5 deletions
diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c index 2c2029a984c..400d134d549 100644 --- a/arch/arm/cpu/armv7/exynos/clock.c +++ b/arch/arm/cpu/armv7/exynos/clock.c @@ -869,7 +869,7 @@ static void exynos4_set_mmc_clk(int dev_index, unsigned int div) { struct exynos4_clock *clk = (struct exynos4_clock *)samsung_get_base_clock(); - unsigned int addr; + unsigned int addr, clear_bit, set_bit; /* * CLK_DIV_FSYS1 @@ -877,20 +877,26 @@ static void exynos4_set_mmc_clk(int dev_index, unsigned int div) * CLK_DIV_FSYS2 * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24] * CLK_DIV_FSYS3 - * MMC4_PRE_RATIO [15:8] + * MMC4_RATIO [3:0] */ if (dev_index < 2) { addr = (unsigned int)&clk->div_fsys1; - } else if (dev_index == 4) { + clear_bit = MASK_PRE_RATIO(dev_index); + set_bit = SET_PRE_RATIO(dev_index, div); + } else if (dev_index == 4) { addr = (unsigned int)&clk->div_fsys3; dev_index -= 4; + /* MMC4 is controlled with the MMC4_RATIO value */ + clear_bit = MASK_RATIO(dev_index); + set_bit = SET_RATIO(dev_index, div); } else { addr = (unsigned int)&clk->div_fsys2; dev_index -= 2; + clear_bit = MASK_PRE_RATIO(dev_index); + set_bit = SET_PRE_RATIO(dev_index, div); } - clrsetbits_le32(addr, 0xff << ((dev_index << 4) + 8), - (div & 0xff) << ((dev_index << 4) + 8)); + clrsetbits_le32(addr, clear_bit, set_bit); } /* exynos5: set the mmc clock */ diff --git a/arch/arm/include/asm/arch-exynos/clk.h b/arch/arm/include/asm/arch-exynos/clk.h index cdeef324cce..ffbc07e228c 100644 --- a/arch/arm/include/asm/arch-exynos/clk.h +++ b/arch/arm/include/asm/arch-exynos/clk.h @@ -16,6 +16,11 @@ #define BPLL 5 #define RPLL 6 +#define MASK_PRE_RATIO(x) (0xff << ((x << 4) + 8)) +#define MASK_RATIO(x) (0xf << (x << 4)) +#define SET_PRE_RATIO(x, y) ((y & 0xff) << ((x << 4) + 8)) +#define SET_RATIO(x, y) ((y & 0xf) << (x << 4)) + enum pll_src_bit { EXYNOS_SRC_MPLL = 6, EXYNOS_SRC_EPLL, |