On Thu, Jul 19, 2012 at 12:39 PM, Rajeshwari Shinde
<rajeshwar...@samsung.com> wrote:
> This adds i2c clock information for EXYNOS5.
>
> Signed-off-by: Alim Akhtar <alim.akh...@samsung.com>
> Signed-off-by: Doug Anderson <diand...@chromium.org>
> Signed-off-by: Rajeshwari Shinde <rajeshwar...@samsung.com>
> Acked-by: Simon Glass <s...@chromium.org>
Acked-by: Simon Glass <s...@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
>
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