Merge samsung, imx, tegra into u-boot-arm/master

[karo-tx-uboot.git] / arch / arm / cpu / armv7 / exynos / clock.c

diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
index fe61f88af4954015b14c478ffa08c53bfc2fcd4b..74599798c435ff84ee4e05117c13936e57351ed7 100644 (file)
--- a/arch/arm/cpu/armv7/exynos/clock.c
+++ b/arch/arm/cpu/armv7/exynos/clock.c
@@ -921,6 +921,21 @@ static int exynos5_set_spi_clk(enum periph_id periph_id,
        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)
 {
        if (cpu_is_exynos5())
@@ -941,6 +956,8 @@ 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;