[U-Boot] [PATCH v3 1/2] EXYNOS4: Add pinmux support for UART

[Jeong-Hyeon Kim]

This patch adds pinmux support for UART channels

Signed-off-by: Jeong-Hyeon Kim <jh...@insignal.co.kr>
---
 arch/arm/cpu/armv7/exynos/pinmux.c |   41 ++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c 
b/arch/arm/cpu/armv7/exynos/pinmux.c
index f02f441..364ee2a 100644
--- a/arch/arm/cpu/armv7/exynos/pinmux.c
+++ b/arch/arm/cpu/armv7/exynos/pinmux.c
@@ -366,6 +366,41 @@ static int exynos4_mmc_config(int peripheral, int flags)
        return 0;
 }
 
+static void exynos4_uart_config(int peripheral)
+{
+       struct exynos4_gpio_part1 *gpio1 =
+               (struct exynos4_gpio_part1 *) samsung_get_base_gpio_part1();
+       struct s5p_gpio_bank *bank;
+       int i, start, count;
+
+       switch (peripheral) {
+       case PERIPH_ID_UART0:
+               bank = &gpio1->a0;
+               start = 0;
+               count = 4;
+               break;
+       case PERIPH_ID_UART1:
+               bank = &gpio1->a0;
+               start = 4;
+               count = 4;
+               break;
+       case PERIPH_ID_UART2:
+               bank = &gpio1->a1;
+               start = 0;
+               count = 4;
+               break;
+       case PERIPH_ID_UART3:
+               bank = &gpio1->a1;
+               start = 4;
+               count = 2;
+               break;
+       }
+       for (i = start; i < start + count; i++) {
+               s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
+               s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2));
+       }
+}
+
 static int exynos4_pinmux_config(int peripheral, int flags)
 {
        switch (peripheral) {
@@ -377,6 +412,12 @@ static int exynos4_pinmux_config(int peripheral, int flags)
        case PERIPH_ID_SDMMC4:
                printf("SDMMC device %d not implemented\n", peripheral);
                return -1;
+       case PERIPH_ID_UART0:
+       case PERIPH_ID_UART1:
+       case PERIPH_ID_UART2:
+       case PERIPH_ID_UART3:
+               exynos4_uart_config(peripheral);
+               break;
        default:
                debug("%s: invalid peripheral %d", __func__, peripheral);
                return -1;
-- 
1.7.9.5

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