ENGR00275413-01: ARM: MSL: add i2c0 support for imx6sl evk

- Add i2c0 support for imx6sl evk platform.
- Read pmic device ID and revsion ID.

Signed-off-by: Fugang Duan  <B38611@freescale.com>

2 files changed, 69 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-mx6/mx6sl_pins.h b/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
index 0825969..cdfeb5f 100644
--- a/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
+++ b/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
@@ -33,5 +33,10 @@ enum {
 	MX6_PAD_FEC_REF_CLK__FEC_REF_OUT			= IOMUX_PAD(0x424, 0x134, 0x10, 0x000, 0, 0),
 	MX6_PAD_FEC_RX_ER__GPIO_4_19				= IOMUX_PAD(0x0428, 0x0138, 5, 0x0000, 0, 0),
 	MX6_PAD_FEC_TX_CLK__GPIO_4_21				= IOMUX_PAD(0x0434, 0x0144, 5, 0x0000, 0, 0),
+
+	MX6_PAD_I2C1_SDA__I2C1_SDA				= IOMUX_PAD(0x0450, 0x0160, 0x10, 0x0720, 2, 0),
+	MX6_PAD_I2C1_SDA__GPIO_3_13				= IOMUX_PAD(0x0450, 0x0160, 5, 0x0000, 0, 0),
+	MX6_PAD_I2C1_SCL__I2C1_SCL				= IOMUX_PAD(0x044C, 0x015C, 0x10, 0x071C, 2, 0),
+	MX6_PAD_I2C1_SCL__GPIO_3_12				= IOMUX_PAD(0x044C, 0x015C, 5, 0x0000, 0, 0),
 };
 #endif	/* __ASM_ARCH_MX6_MX6SL_PINS_H__ */
diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c
index ffcb1a4..f45f335 100644
--- a/board/freescale/mx6slevk/mx6slevk.c
+++ b/board/freescale/mx6slevk/mx6slevk.c
@@ -21,6 +21,11 @@
 #include <common.h>
 #include <fsl_esdhc.h>
 #include <mmc.h>
+#include <netdev.h>
+#if CONFIG_I2C_MXC
+#include <i2c.h>
+#include <asm/imx-common/mxc_i2c.h>
+#endif
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -36,6 +41,28 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED   |             \
 	PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)
 
+#define I2C_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_PUE |            \
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \
+	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
+	PAD_CTL_ODE | PAD_CTL_SRE_FAST)
+
+#if CONFIG_I2C_MXC
+#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
+/* I2C1 for PMIC */
+struct i2c_pads_info i2c_pad_info0 = {
+	.scl = {
+		.i2c_mode = MX6_PAD_I2C1_SDA__I2C1_SDA | PC,
+		.gpio_mode = MX6_PAD_I2C1_SDA__GPIO_3_13 | PC,
+		.gp = IMX_GPIO_NR(3, 13),
+	},
+	.sda = {
+		.i2c_mode = MX6_PAD_I2C1_SCL__I2C1_SCL | PC,
+		.gpio_mode = MX6_PAD_I2C1_SCL__GPIO_3_12 | PC,
+		.gp = IMX_GPIO_NR(3, 12),
+	},
+};
+#endif
+
 int dram_init(void)
 {
 	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
@@ -134,6 +161,28 @@ static int setup_fec(void)
 }
 #endif
 
+#ifdef CONFIG_I2C_MXC
+static int setup_pmic_voltages(void)
+{
+	unsigned char value, rev_id = 0;
+
+	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+	if (!i2c_probe(0x8)) {
+		if (i2c_read(0x8, 0, 1, &value, 1)) {
+			printf("Read device ID error!\n");
+			return -1;
+		}
+		if (i2c_read(0x8, 3, 1, &rev_id, 1)) {
+			printf("Read Rev ID error!\n");
+			return -1;
+		}
+		printf("Found PFUZE100! deviceid=%x,revid=%x\n", value, rev_id);
+	}
+
+	return 0;
+}
+#endif
+
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
@@ -152,6 +201,21 @@ int board_init(void)
 	return 0;
 }
 
+int board_late_init(void)
+{
+	int ret = 0;
+
+#ifdef CONFIG_I2C_MXC
+	setup_i2c(0, CONFIG_SYS_I2C_SPEED,
+			CONFIG_SYS_I2C_SLAVE, &i2c_pad_info0);
+	ret = setup_pmic_voltages();
+	if (ret)
+		return -1;
+#endif
+
+	return 0;
+}
+
 u32 get_board_rev(void)
 {
 	return get_cpu_rev();