From 83d745dd88743a8355a7e58bcb17d475c17b979d Mon Sep 17 00:00:00 2001 From: Piotr Wilczek Date: Tue, 20 Nov 2012 02:19:02 +0000 Subject: exynos:clock: Add i2c clock This patch adds i2c clock for Exynos4 Signed-off-by: Piotr Wilczek Signed-off-by: Kyungmin Park CC: Minkyu Kang --- arch/arm/cpu/armv7/exynos/clock.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'arch/arm/cpu/armv7/exynos') 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; -- cgit v1.1 From 89bd58a1e9cb482109498ac38b38fc39d22fb421 Mon Sep 17 00:00:00 2001 From: Piotr Wilczek Date: Tue, 20 Nov 2012 02:19:04 +0000 Subject: exynos:pinmux: Add pinmux support for i2c This patch add pinmux for I2C for Exynos4 Signed-off-by: Piotr Wilczek Signed-off-by: Kyungmin Park CC: Minkyu Kang --- arch/arm/cpu/armv7/exynos/pinmux.c | 64 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) (limited to 'arch/arm/cpu/armv7/exynos') diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c index 7776add..44ce072 100644 --- a/arch/arm/cpu/armv7/exynos/pinmux.c +++ b/arch/arm/cpu/armv7/exynos/pinmux.c @@ -265,10 +265,74 @@ static int exynos5_pinmux_config(int peripheral, int flags) return 0; } +static void exynos4_i2c_config(int peripheral, int flags) +{ + struct exynos4_gpio_part1 *gpio1 = + (struct exynos4_gpio_part1 *) samsung_get_base_gpio_part1(); + + switch (peripheral) { + case PERIPH_ID_I2C0: + s5p_gpio_cfg_pin(&gpio1->d1, 0, GPIO_FUNC(0x2)); + s5p_gpio_cfg_pin(&gpio1->d1, 1, GPIO_FUNC(0x2)); + break; + case PERIPH_ID_I2C1: + s5p_gpio_cfg_pin(&gpio1->d1, 2, GPIO_FUNC(0x2)); + s5p_gpio_cfg_pin(&gpio1->d1, 3, GPIO_FUNC(0x2)); + break; + case PERIPH_ID_I2C2: + s5p_gpio_cfg_pin(&gpio1->a0, 6, GPIO_FUNC(0x3)); + s5p_gpio_cfg_pin(&gpio1->a0, 7, GPIO_FUNC(0x3)); + break; + case PERIPH_ID_I2C3: + s5p_gpio_cfg_pin(&gpio1->a1, 2, GPIO_FUNC(0x3)); + s5p_gpio_cfg_pin(&gpio1->a1, 3, GPIO_FUNC(0x3)); + break; + case PERIPH_ID_I2C4: + s5p_gpio_cfg_pin(&gpio1->b, 2, GPIO_FUNC(0x3)); + s5p_gpio_cfg_pin(&gpio1->b, 3, GPIO_FUNC(0x3)); + break; + case PERIPH_ID_I2C5: + s5p_gpio_cfg_pin(&gpio1->b, 6, GPIO_FUNC(0x3)); + s5p_gpio_cfg_pin(&gpio1->b, 7, GPIO_FUNC(0x3)); + break; + case PERIPH_ID_I2C6: + s5p_gpio_cfg_pin(&gpio1->c1, 3, GPIO_FUNC(0x4)); + s5p_gpio_cfg_pin(&gpio1->c1, 4, GPIO_FUNC(0x4)); + break; + case PERIPH_ID_I2C7: + s5p_gpio_cfg_pin(&gpio1->d0, 2, GPIO_FUNC(0x3)); + s5p_gpio_cfg_pin(&gpio1->d0, 3, GPIO_FUNC(0x3)); + break; + } +} + +static int exynos4_pinmux_config(int peripheral, int flags) +{ + switch (peripheral) { + case PERIPH_ID_I2C0: + case PERIPH_ID_I2C1: + case PERIPH_ID_I2C2: + case PERIPH_ID_I2C3: + case PERIPH_ID_I2C4: + case PERIPH_ID_I2C5: + case PERIPH_ID_I2C6: + case PERIPH_ID_I2C7: + exynos4_i2c_config(peripheral, flags); + break; + default: + debug("%s: invalid peripheral %d", __func__, peripheral); + return -1; + } + + return 0; +} + int exynos_pinmux_config(int peripheral, int flags) { if (cpu_is_exynos5()) return exynos5_pinmux_config(peripheral, flags); + else if (cpu_is_exynos4()) + return exynos4_pinmux_config(peripheral, flags); else { debug("pinmux functionality not supported\n"); return -1; -- cgit v1.1