[U-Boot] [PATCH v4 2/2] i2c:soft:multi: Enable soft I2C multibus at Trats development board

Lukasz Majewski
2012-09-05T09:15:21Z

This commit enables multibus handling at Samsung's Trats development board.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>

---
Changes for v2:
- CONFIG_SOFT_I2C_MULTI_BUS flag added to Trats configuration

Changes for v3:
- correct definition of TRATS I2C_1 pins

Changes for v4:
- Assign I2C numbers reflecting the HW structure of Trats board
- Change the max I2C numbers to 15 from 7
- i2c_init_board() function defined for trats board
---
board/samsung/trats/trats.c | 15 +++++++++++++++
include/configs/trats.h | 24 +++++++++++++++++-------
2 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/board/samsung/trats/trats.c b/board/samsung/trats/trats.c
index 4f9cb5a..e11a892 100644
--- a/board/samsung/trats/trats.c
+++ b/board/samsung/trats/trats.c
@@ -75,6 +75,21 @@ int board_init(void)
return 0;
}

+void i2c_init_board(void)
+{
+ struct exynos4_gpio_part1 *gpio1 =
+ (struct exynos4_gpio_part1 *)samsung_get_base_gpio_part1();
+ struct exynos4_gpio_part2 *gpio2 =
+ (struct exynos4_gpio_part2 *)samsung_get_base_gpio_part2();
+
+ /* I2C_5 -> PMIC */
+ s5p_gpio_direction_output(&gpio1->b, 7, 1);
+ s5p_gpio_direction_output(&gpio1->b, 6, 1);
+ /* I2C_9 -> FG */
+ s5p_gpio_direction_output(&gpio2->y4, 0, 1);
+ s5p_gpio_direction_output(&gpio2->y4, 1, 1);
+}
+
int dram_init(void)
{
gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE) +
diff --git a/include/configs/trats.h b/include/configs/trats.h
index c6fb2e0..866c047 100644
--- a/include/configs/trats.h
+++ b/include/configs/trats.h
@@ -235,18 +235,28 @@
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_LOAD_ADDR - GENERATED_GBL_DATA_SIZE)
#define CONFIG_SYS_CACHELINE_SIZE 32

-#include <asm/arch/gpio.h>
-/*
- * I2C Settings
- */
-#define CONFIG_SOFT_I2C_GPIO_SCL exynos4_gpio_part1_get_nr(b, 7)
-#define CONFIG_SOFT_I2C_GPIO_SDA exynos4_gpio_part1_get_nr(b, 6)

#define CONFIG_SOFT_I2C
#define CONFIG_SOFT_I2C_READ_REPEATED_START
+#define CONFIG_SYS_I2C_INIT_BOARD
#define CONFIG_SYS_I2C_SPEED 50000
#define CONFIG_I2C_MULTI_BUS
-#define CONFIG_SYS_MAX_I2C_BUS 7
+#define CONFIG_SOFT_I2C_MULTI_BUS
+#define CONFIG_SYS_MAX_I2C_BUS 15
+
+#include <asm/arch/gpio.h>
+
+/* I2C PMIC */
+#define CONFIG_SOFT_I2C_I2C5_SCL exynos4_gpio_part1_get_nr(b, 7)
+#define CONFIG_SOFT_I2C_I2C5_SDA exynos4_gpio_part1_get_nr(b, 6)
+
+/* I2C FG */
+#define CONFIG_SOFT_I2C_I2C9_SCL exynos4_gpio_part2_get_nr(y4, 1)
+#define CONFIG_SOFT_I2C_I2C9_SDA exynos4_gpio_part2_get_nr(y4, 0)
+
+#define CONFIG_SOFT_I2C_GPIO_SCL get_multi_scl_pin()
+#define CONFIG_SOFT_I2C_GPIO_SDA get_multi_sda_pin()
+#define I2C_INIT multi_i2c_init()

#define CONFIG_PMIC
#define CONFIG_PMIC_I2C
--
1.7.2.3