From mboxrd@z Thu Jan 1 00:00:00 1970 From: Piotr Wilczek Date: Mon, 22 Oct 2012 09:21:15 +0200 Subject: [U-Boot] [PATCH v2 1/9] exynos:clock: Add i2c clock In-Reply-To: <1350890483-26579-1-git-send-email-p.wilczek@samsung.com> References: <1350890483-26579-1-git-send-email-p.wilczek@samsung.com> Message-ID: <1350890483-26579-2-git-send-email-p.wilczek@samsung.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de This patch adds i2c clock for Exynos4 Signed-off-by: Piotr Wilczek Signed-off-by: Kyungmin Park CC: Minkyu Kang --- Changes for v2: - modified exynos4_get_i2c_clk function 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 4f3b451..21e45d2 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; -- 1.7.5.4