diff options
Diffstat (limited to 'arch/arm/cpu/armv7/exynos/clock.c')
| -rw-r--r-- | arch/arm/cpu/armv7/exynos/clock.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c index fe61f88af4..c6c66814e5 100644 --- a/arch/arm/cpu/armv7/exynos/clock.c +++ b/arch/arm/cpu/armv7/exynos/clock.c @@ -919,6 +919,20 @@ static int exynos5_set_spi_clk(enum periph_id periph_id, clrsetbits_le32(reg, mask << pre_shift, (fine & mask) << pre_shift); return 0; + +static unsigned long exynos4_get_i2c_clk(void) +{ + struct exynos4_clock *clk = + (struct exynos4_clock *)samsung_get_base_clock(); + unsigned long sclk, aclk_100; + unsigned int ratio; + + sclk = get_pll_clk(APLL); + + ratio = (readl(&clk->div_top)) >> 4; + ratio &= 0xf; + aclk_100 = sclk / (ratio + 1); + return aclk_100; } unsigned long get_pll_clk(int pllreg) @@ -941,6 +955,8 @@ unsigned long get_i2c_clk(void) { if (cpu_is_exynos5()) { return exynos5_get_i2c_clk(); + } else if (cpu_is_exynos4()) { + return exynos4_get_i2c_clk(); } else { debug("I2C clock is not set for this CPU\n"); return 0; |