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@samsung.com Signed-off-by: Doug Anderson dianders@chromium.org Signed-off-by: Rajeshwari Shinde rajeshwari.s@samsung.com Acked-by: Simon Glass sjg@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