[U-Boot] [PATCH 4/4 V3] EXYNOS5: GPIO: Enable GPIO Command for EXYNOS5

[Rajeshwari Shinde]

This patch enables GPIO Command for EXYNOS5.
Function has been added to asm/gpio.h to decode the
input gpio name to gpio number.
example: gpio set gpa00

Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
---
Changes in V2:
        - New patch
Changes in V3:
	- Created a table to know the base address of input bank.
 arch/arm/cpu/armv7/exynos/pinmux.c      |   50 +++++++++++++++++++++++++++++++
 arch/arm/include/asm/arch-exynos/gpio.h |    8 +++++
 include/configs/exynos5250-dt.h         |    1 +
 3 files changed, 59 insertions(+), 0 deletions(-)

diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c
index 28b0306..a01ce0c 100644
--- a/arch/arm/cpu/armv7/exynos/pinmux.c
+++ b/arch/arm/cpu/armv7/exynos/pinmux.c
@@ -27,6 +27,21 @@
 #include <asm/arch/pinmux.h>
 #include <asm/arch/sromc.h>
 
+struct gpio_name_num_table exynos5_gpio_table[] = {
+	{ 'a', GPIO_A00 },
+	{ 'b', GPIO_B00 },
+	{ 'c', GPIO_C00 },
+	{ 'd', GPIO_D00 },
+	{ 'y', GPIO_Y00 },
+	{ 'x', GPIO_X00 },
+	{ 'e', GPIO_E00 },
+	{ 'f', GPIO_F00 },
+	{ 'g', GPIO_G00 },
+	{ 'h', GPIO_H00 },
+	{ 'v', GPIO_V00 },
+	{ 'z', GPIO_Z0 },
+};
+
 static void exynos5_uart_config(int peripheral)
 {
 	int i, start, count;
@@ -448,3 +463,38 @@ int pinmux_decode_periph_id(const void *blob, int node)
 		return PERIPH_ID_NONE;
 }
 #endif
+
+int name_to_gpio(const char *name)
+{
+	unsigned int num, i;
+
+	name++;
+
+	if (*name == 'p')
+		++name;
+
+	for (i = 0; i < ARRAY_SIZE(exynos5_gpio_table); i++) {
+		if (*name == exynos5_gpio_table[i].bank) {
+			if (*name == 'c') {
+				name++;
+				num = simple_strtoul(name, NULL, 10);
+				if (num >= 40) {
+					num = GPIO_C40 + (num - 40);
+				} else {
+					num = simple_strtoul(name, NULL, 8);
+					num = exynos5_gpio_table[i].base + num;
+				}
+			} else {
+				name++;
+				num = simple_strtoul(name, NULL, 8);
+				num = exynos5_gpio_table[i].base + num;
+			}
+			break;
+		}
+	}
+
+	if (i == ARRAY_SIZE(exynos5_gpio_table))
+		return -1;
+	
+	return num;
+}
diff --git a/arch/arm/include/asm/arch-exynos/gpio.h b/arch/arm/include/asm/arch-exynos/gpio.h
index 38b959d..016a112 100644
--- a/arch/arm/include/asm/arch-exynos/gpio.h
+++ b/arch/arm/include/asm/arch-exynos/gpio.h
@@ -657,6 +657,14 @@ static inline unsigned int s5p_gpio_part_max(int nr)
 void gpio_cfg_pin(int gpio, int cfg);
 void gpio_set_pull(int gpio, int mode);
 void gpio_set_drv(int gpio, int mode);
+
+struct gpio_name_num_table {
+	char bank;
+	unsigned int base;
+};
+
+int name_to_gpio(const char *name);
+#define name_to_gpio(n) name_to_gpio(n)
 #endif
 
 /* Pin configurations */
diff --git a/include/configs/exynos5250-dt.h b/include/configs/exynos5250-dt.h
index b1b24a9..a32cc3e 100644
--- a/include/configs/exynos5250-dt.h
+++ b/include/configs/exynos5250-dt.h
@@ -113,6 +113,7 @@
 #define CONFIG_CMD_EXT2
 #define CONFIG_CMD_FAT
 #define CONFIG_CMD_NET
+#define CONFIG_CMD_GPIO
 
 #define CONFIG_BOOTDELAY		3
 #define CONFIG_ZERO_BOOTDELAY_CHECK
-- 
1.7.4.4