On Thu, Jul 19, 2012 at 12:39 PM, Rajeshwari Shinde rajeshwari.s@samsung.com wrote:
This adds i2c clock information for EXYNOS5.
Signed-off-by: Alim Akhtar alim.akhtar@samsung.com Signed-off-by: Doug Anderson dianders@chromium.org Signed-off-by: Rajeshwari Shinde rajeshwari.s@samsung.com Acked-by: Simon Glass sjg@chromium.org
Acked-by: Simon Glass sjg@chromium.org
changes in V2: - Incorporated comments from Simon Glass which are removed extra braces around (readl(&clk->div_top1)) >> 24 and gave a tab space for return statement. Changes in V3: - None Changes in V4: - None Changes in V5: - None. Changes in V6: - Incorporated review comments from Simon Glass. arch/arm/cpu/armv7/exynos/clock.c | 33 ++++++++++++++++++++++++++++++++ arch/arm/include/asm/arch-exynos/clk.h | 1 + 2 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c index 672598f..de3db8e 100644 --- a/arch/arm/cpu/armv7/exynos/clock.c +++ b/arch/arm/cpu/armv7/exynos/clock.c @@ -605,6 +605,29 @@ void exynos4_set_mipi_clk(void) writel(cfg, &clk->div_lcd0); }
+/*
- I2C
- exynos5: obtaining the I2C clock
- */
+static unsigned long exynos5_get_i2c_clk(void) +{
struct exynos5_clock *clk =(struct exynos5_clock *)samsung_get_base_clock();unsigned long aclk_66, aclk_66_pre, sclk;unsigned int ratio;sclk = get_pll_clk(MPLL);ratio = (readl(&clk->div_top1)) >> 24;ratio &= 0x7;aclk_66_pre = sclk / (ratio + 1);ratio = readl(&clk->div_top0);ratio &= 0x7;aclk_66 = aclk_66_pre / (ratio + 1);return aclk_66;+}
unsigned long get_pll_clk(int pllreg) { if (cpu_is_exynos5()) @@ -621,6 +644,16 @@ unsigned long get_arm_clk(void) return exynos4_get_arm_clk(); }
+unsigned long get_i2c_clk(void) +{
if (cpu_is_exynos5()) {return exynos5_get_i2c_clk();} else {debug("I2C clock is not set for this CPU\n");return 0;}+}
unsigned long get_pwm_clk(void) { if (cpu_is_exynos5()) diff --git a/arch/arm/include/asm/arch-exynos/clk.h b/arch/arm/include/asm/arch-exynos/clk.h index e99339a..5529025 100644 --- a/arch/arm/include/asm/arch-exynos/clk.h +++ b/arch/arm/include/asm/arch-exynos/clk.h @@ -31,6 +31,7 @@
unsigned long get_pll_clk(int pllreg); unsigned long get_arm_clk(void); +unsigned long get_i2c_clk(void); unsigned long get_pwm_clk(void); unsigned long get_uart_clk(int dev_index); void set_mmc_clk(int dev_index, unsigned int div); -- 1.7.4.4