EXYNOS4210: Configure GPIO for uart

This patch configures the gpio values for UART
on Origen and SMDKV310 using pinmux

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

arch/arm/cpu/armv7/exynos/pinmux.c

@@ -408,9 +408,49 @@ 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) {
+	case PERIPH_ID_UART0:
+	case PERIPH_ID_UART1:
+	case PERIPH_ID_UART2:
+	case PERIPH_ID_UART3:
+		exynos4_uart_config(peripheral);
+		break;
 	case PERIPH_ID_I2C0:
 	case PERIPH_ID_I2C1:
 	case PERIPH_ID_I2C2:

board/samsung/origen/origen.c

@@ -25,6 +25,8 @@
 #include <asm/arch/cpu.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/mmc.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/pinmux.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 struct exynos4_gpio_part1 *gpio1;
@@ -39,6 +41,50 @@ int board_init(void)
 	return 0;
 }
 
+static int board_uart_init(void)
+{
+	int err;
+
+	err = exynos_pinmux_config(PERIPH_ID_UART0, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART0 not configured\n");
+		return err;
+	}
+
+	err = exynos_pinmux_config(PERIPH_ID_UART1, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART1 not configured\n");
+		return err;
+	}
+
+	err = exynos_pinmux_config(PERIPH_ID_UART2, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART2 not configured\n");
+		return err;
+	}
+
+	err = exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART3 not configured\n");
+		return err;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_BOARD_EARLY_INIT_F
+int board_early_init_f(void)
+{
+	int err;
+	err = board_uart_init();
+	if (err) {
+		debug("UART init failed\n");
+		return err;
+	}
+	return err;
+}
+#endif
+
 int dram_init(void)
 {
 	gd->ram_size	= get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE)

board/samsung/smdkv310/smdkv310.c

@@ -26,6 +26,8 @@
 #include <asm/arch/cpu.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/mmc.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/pinmux.h>
 #include <asm/arch/sromc.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -137,3 +139,47 @@ int board_mmc_init(bd_t *bis)
 	return err;
 }
 #endif
+
+static int board_uart_init(void)
+{
+	int err;
+
+	err = exynos_pinmux_config(PERIPH_ID_UART0, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART0 not configured\n");
+		return err;
+	}
+
+	err = exynos_pinmux_config(PERIPH_ID_UART1, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART1 not configured\n");
+		return err;
+	}
+
+	err = exynos_pinmux_config(PERIPH_ID_UART2, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART2 not configured\n");
+		return err;
+	}
+
+	err = exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART3 not configured\n");
+		return err;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_BOARD_EARLY_INIT_F
+int board_early_init_f(void)
+{
+	int err;
+	err = board_uart_init();
+	if (err) {
+		debug("UART init failed\n");
+		return err;
+	}
+	return err;
+}
+#endif

include/configs/origen.h

@@ -36,6 +36,7 @@
 #define CONFIG_ARCH_CPU_INIT
 #define CONFIG_DISPLAY_CPUINFO
 #define CONFIG_DISPLAY_BOARDINFO
+#define CONFIG_BOARD_EARLY_INIT_F
 
 /* Keep L2 Cache Disabled */
 #define CONFIG_L2_OFF			1

include/configs/smdkv310.h

@@ -36,6 +36,7 @@
 #define CONFIG_ARCH_CPU_INIT
 #define CONFIG_DISPLAY_CPUINFO
 #define CONFIG_DISPLAY_BOARDINFO
+#define CONFIG_BOARD_EARLY_INIT_F
 
 /* Mach Type */
 #define CONFIG_MACH_TYPE		MACH_TYPE_SMDKV310