[U-Boot] [PATCH 8/8 V7] CONFIG: SMDK5250: I2C: Enable I2C

[Rajeshwari Shinde]

This enables I2C support on smdk5250.
Pinmux setting moved to board file to avoid repeated setting of
gpio lines.

Signed-off-by: Alim Akhtar <alim.akhtar at samsung.com>
Signed-off-by: Doug Anderson <dianders at chromium.org>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
Acked-by: Simon Glass <sjg at chromium.org>
---
Changes in V2:
        - None
Changes in V3:
        - None
Changes in V4:
        - None
Changes in V5:
        - Pinmux setting of gpio lines moved to board_early_init_f.
Changes in V6:
        - EXYNOS_I2C_SPACING moved to cpu.h
        - board_i2c_init compiled only when CONFIG_DRIVER_S3C24X0_I2C is defined.
Changes in V7:
	- board_i2c_init compiled only when CONFIG_SYS_I2C_INIT_BOARD is defined.
 board/samsung/smdk5250/smdk5250.c |   30 +++++++++++++++++++++++++++++-
 include/configs/smdk5250.h        |   10 ++++++++++
 2 files changed, 39 insertions(+), 1 deletions(-)

diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c
index b593325..a5816e4 100644
--- a/board/samsung/smdk5250/smdk5250.c
+++ b/board/samsung/smdk5250/smdk5250.c
@@ -22,6 +22,7 @@
 
 #include <common.h>
 #include <asm/io.h>
+#include <i2c.h>
 #include <netdev.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/gpio.h>
@@ -172,9 +173,36 @@ static int board_uart_init(void)
 	return 0;
 }
 
+#ifdef CONFIG_SYS_I2C_INIT_BOARD
+static int board_i2c_init(void)
+{
+	int i, err;
+
+	for (i = 0; i < CONFIG_MAX_I2C_NUM; i++) {
+		err = exynos_pinmux_config((PERIPH_ID_I2C0 + i),
+						PINMUX_FLAG_NONE);
+		if (err) {
+			debug("I2C%d not configured\n", (PERIPH_ID_I2C0 + i));
+			return err;
+		}
+	}
+	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+	return 0;
+}
+#endif
+
 #ifdef CONFIG_BOARD_EARLY_INIT_F
 int board_early_init_f(void)
 {
-	return board_uart_init();
+	int err;
+	err = board_uart_init();
+	if (err) {
+		debug("UART init failed\n");
+		return err;
+	}
+#ifdef CONFIG_SYS_I2C_INIT_BOARD
+	err = board_i2c_init();
+#endif
+	return err;
 }
 #endif
diff --git a/include/configs/smdk5250.h b/include/configs/smdk5250.h
index c0eaaf8..27dab76 100644
--- a/include/configs/smdk5250.h
+++ b/include/configs/smdk5250.h
@@ -198,6 +198,16 @@
 
 #define CONFIG_SYS_INIT_SP_ADDR	(CONFIG_SYS_LOAD_ADDR - 0x1000000)
 
+/* I2C */
+#define CONFIG_SYS_I2C_INIT_BOARD
+#define CONFIG_HARD_I2C
+#define CONFIG_CMD_I2C
+#define CONFIG_SYS_I2C_SPEED	100000		/* 100 Kbps */
+#define CONFIG_DRIVER_S3C24X0_I2C
+#define CONFIG_I2C_MULTI_BUS
+#define CONFIG_MAX_I2C_NUM	8
+#define CONFIG_SYS_I2C_SLAVE    0x0
+
 /* Ethernet Controllor Driver */
 #ifdef CONFIG_CMD_NET
 #define CONFIG_SMC911X
-- 
1.7.4.4