diff options
| -rw-r--r-- | arch/arm/cpu/armv7/exynos/clock.c | 12 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-exynos/clock.h | 3 |
2 files changed, 14 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c index f7829b2cc7..366c35ae08 100644 --- a/arch/arm/cpu/armv7/exynos/clock.c +++ b/arch/arm/cpu/armv7/exynos/clock.c @@ -98,7 +98,7 @@ static unsigned long exynos5_get_pll_clk(int pllreg) struct exynos5_clock *clk = (struct exynos5_clock *)samsung_get_base_clock(); unsigned long r, m, p, s, k = 0, mask, fout; - unsigned int freq; + unsigned int freq, pll_div2_sel, mpll_fout_sel; switch (pllreg) { case APLL: @@ -155,6 +155,16 @@ static unsigned long exynos5_get_pll_clk(int pllreg) fout = m * (freq / (p * (1 << (s - 1)))); } + /* According to the user manual, in EVT1 MPLL always gives + * 1.6GHz clock, so divide by 2 to get 800MHz MPLL clock.*/ + if (pllreg == MPLL) { + pll_div2_sel = readl(&clk->pll_div2_sel); + mpll_fout_sel = (pll_div2_sel >> MPLL_FOUT_SEL_SHIFT) + & MPLL_FOUT_SEL_MASK; + if (mpll_fout_sel == 0) + fout /= 2; + } + return fout; } diff --git a/arch/arm/include/asm/arch-exynos/clock.h b/arch/arm/include/asm/arch-exynos/clock.h index 90271f1a48..bf41c1959f 100644 --- a/arch/arm/include/asm/arch-exynos/clock.h +++ b/arch/arm/include/asm/arch-exynos/clock.h @@ -596,4 +596,7 @@ struct exynos5_clock { unsigned char res123[0xf5d8]; }; #endif + +#define MPLL_FOUT_SEL_SHIFT 4 +#define MPLL_FOUT_SEL_MASK 0x1 #endif |