diff options
| author | Piotr Wilczek <p.wilczek@samsung.com> | 2012-11-20 02:19:02 +0000 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2012-12-11 13:17:31 -0700 |
| commit | 83d745dd88743a8355a7e58bcb17d475c17b979d (patch) | |
| tree | 5c83e81e3b53d125629987d84137635474320c8e /arch/arm/cpu/armv7/exynos | |
| parent | 66839773a82cb56ebeb2b99322151f8a57a30efb (diff) | |
exynos:clock: Add i2c clock
This patch adds i2c clock for Exynos4
Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'arch/arm/cpu/armv7/exynos')
| -rw-r--r-- | arch/arm/cpu/armv7/exynos/clock.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c index 4f3b451be9..21e45d2e82 100644 --- a/arch/arm/cpu/armv7/exynos/clock.c +++ b/arch/arm/cpu/armv7/exynos/clock.c @@ -732,6 +732,21 @@ static unsigned long exynos5_get_i2c_clk(void) return aclk_66; } +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()) @@ -752,6 +767,8 @@ 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; |