On 07/19/2012 08:40 PM, Rajeshwari Shinde wrote:
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.akh...@samsung.com>
Signed-off-by: Doug Anderson <diand...@chromium.org>
Signed-off-by: Rajeshwari Shinde <rajeshwar...@samsung.com>
Acked-by: Simon Glass <s...@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.
Chnages in V6:
- EXYNOS_I2C_SPACING moved to cpu.h
- board_i2c_init compiled only when CONFIG_DRIVER_S3C24X0_I2C is
defined.
board/samsung/smdk5250/smdk5250.c | 28 +++++++++++++++++++++++++++-
include/configs/smdk5250.h | 8 ++++++++
2 files changed, 35 insertions(+), 1 deletions(-)
diff --git a/board/samsung/smdk5250/smdk5250.c
b/board/samsung/smdk5250/smdk5250.c
index b593325..12e6e66 100644
--- a/board/samsung/smdk5250/smdk5250.c
+++ b/board/samsung/smdk5250/smdk5250.c
@@ -172,9 +172,35 @@ static int board_uart_init(void)
return 0;
}
+#ifdef CONFIG_DRIVER_S3C24X0_I2C
+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;
+ }
+ }
+ return 0;
+}
+#endif
How about use CONFIG_SYS_I2C_INIT_BOARD and i2c_init_board()?
Some i2c drivers are using them.
+
#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_DRIVER_S3C24X0_I2C
+ err = board_i2c_init();
+#endif
+ return err;
}
#endif
diff --git a/include/configs/smdk5250.h b/include/configs/smdk5250.h
index c0eaaf8..65dfe9f 100644
--- a/include/configs/smdk5250.h
+++ b/include/configs/smdk5250.h
@@ -198,6 +198,14 @@
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_LOAD_ADDR - 0x1000000)
+/* I2C */
+#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
+
/* Ethernet Controllor Driver */
#ifdef CONFIG_CMD_NET
#define CONFIG_SMC911X
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