mx6qsabreauto: Add i2c to mx6qsabreauto board

Add i2c2 and 3 to mx6qsabreauto board, i2c3 is multiplexed
use gpio to set steering.

Signed-off-by: Renato Frias <b13784@freescale.com>
Reviewed-by: Otavio Salvador <otavio@ossystems.com.br>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>

board/freescale/mx6qsabreauto/mx6qsabreauto.c

@@ -26,12 +26,14 @@
 #include <asm/errno.h>
 #include <asm/gpio.h>
 #include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/mxc_i2c.h>
 #include <asm/imx-common/boot_mode.h>
 #include <mmc.h>
 #include <fsl_esdhc.h>
 #include <miiphy.h>
 #include <netdev.h>
 #include <asm/arch/sys_proto.h>
+#include <i2c.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -46,6 +48,12 @@ DECLARE_GLOBAL_DATA_PTR;
 #define ENET_PAD_CTRL  (PAD_CTL_PUS_100K_UP |			\
 	PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
 
+#define I2C_PAD_CTRL	(PAD_CTL_PUS_100K_UP |			\
+	PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS |	\
+	PAD_CTL_ODE | PAD_CTL_SRE_FAST)
+
+#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
+
 int dram_init(void)
 {
 	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
@@ -76,6 +84,41 @@ iomux_v3_cfg_t const enet_pads[] = {
 	MX6_PAD_RGMII_RX_CTL__RGMII_RX_CTL	| MUX_PAD_CTRL(ENET_PAD_CTRL),
 };
 
+/* I2C2 PMIC, iPod, Tuner, Codec, Touch, HDMI EDID, MIPI CSI2 card */
+struct i2c_pads_info i2c_pad_info1 = {
+	.scl = {
+		.i2c_mode = MX6_PAD_EIM_EB2__I2C2_SCL | PC,
+		.gpio_mode = MX6_PAD_EIM_EB2__GPIO_2_30 | PC,
+		.gp = IMX_GPIO_NR(2, 30)
+	},
+	.sda = {
+		.i2c_mode = MX6_PAD_KEY_ROW3__I2C2_SDA | PC,
+		.gpio_mode = MX6_PAD_KEY_ROW3__GPIO_4_13 | PC,
+		.gp = IMX_GPIO_NR(4, 13)
+	}
+};
+
+/*
+ * I2C3 MLB, Port Expanders (A, B, C), Video ADC, Light Sensor,
+ * Compass Sensor, Accelerometer, Res Touch
+ */
+struct i2c_pads_info i2c_pad_info2 = {
+	.scl = {
+		.i2c_mode = MX6_PAD_GPIO_3__I2C3_SCL | PC,
+		.gpio_mode = MX6_PAD_GPIO_3__GPIO_1_3 | PC,
+		.gp = IMX_GPIO_NR(1, 3)
+	},
+	.sda = {
+		.i2c_mode = MX6_PAD_EIM_D18__I2C3_SDA | PC,
+		.gpio_mode = MX6_PAD_EIM_D18__GPIO_3_18 | PC,
+		.gp = IMX_GPIO_NR(3, 18)
+	}
+};
+
+iomux_v3_cfg_t const i2c3_pads[] = {
+	MX6_PAD_EIM_A24__GPIO_5_4		| MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
 static void setup_iomux_enet(void)
 {
 	imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
@@ -216,6 +259,13 @@ int board_init(void)
 	/* address of boot parameters */
 	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
 
+	/* I2C 2 and 3 setup - I2C 3 hw mux with EIM */
+	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
+	/* I2C 3 Steer */
+	gpio_direction_output(IMX_GPIO_NR(5, 4), 1);
+	imx_iomux_v3_setup_multiple_pads(i2c3_pads, ARRAY_SIZE(i2c3_pads));
+	setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info2);
+
 	return 0;
 }
 

include/configs/mx6qsabreauto.h

@@ -38,4 +38,10 @@
 #define CONFIG_SYS_MMC_ENV_PART		1	/* Boot partition 1 */
 #endif
 
+/* I2C Configs */
+#define CONFIG_CMD_I2C
+#define CONFIG_I2C_MULTI_BUS
+#define CONFIG_I2C_MXC
+#define CONFIG_SYS_I2C_SPEED		100000
+
 #endif                         /* __MX6QSABREAUTO_CONFIG_H */