From 3f66148f3dc4ed3966e211e59bd864b955389706 Mon Sep 17 00:00:00 2001
From: "Ye.Li" <B37916@freescale.com>
Date: Mon, 20 Oct 2014 11:14:58 +0800
Subject: MLK-9705 imx: mx6sxsabreauto: add MAX7310 support to reset
 peripherals

The MAX7310 uses I2C3 bus. At system initialization, enable the driver to:
1. Reset CPU_PER_RST_B signal
2. Set the steering for ENET
3. Enable the LVDS display

Signed-off-by: Ye.Li <B37916@freescale.com>
---
 board/freescale/mx6sxsabreauto/mx6sxsabreauto.c | 41 +++++++++++++++++++++++++
 include/configs/mx6sxsabreauto.h                |  5 +++
 2 files changed, 46 insertions(+)

diff --git a/board/freescale/mx6sxsabreauto/mx6sxsabreauto.c b/board/freescale/mx6sxsabreauto/mx6sxsabreauto.c
index dc3295a..9a24c99 100644
--- a/board/freescale/mx6sxsabreauto/mx6sxsabreauto.c
+++ b/board/freescale/mx6sxsabreauto/mx6sxsabreauto.c
@@ -34,6 +34,10 @@
 #include <mxsfb.h>
 #endif
 
+#ifdef CONFIG_MAX7310_IOEXP
+#include <gpio_exp.h>
+#endif
+
 #ifdef CONFIG_FASTBOOT
 #include <fastboot.h>
 #ifdef CONFIG_ANDROID_RECOVERY
@@ -200,6 +204,26 @@ static void setup_iomux_fec(int fec_id)
 }
 #endif
 
+#ifdef CONFIG_MAX7310_IOEXP
+
+#define CPU_PER_RST_B	IOEXP_GPIO_NR(1, 4)
+#define LVDS_EN_PIN		IOEXP_GPIO_NR(1, 7)
+#define STEER_ENET		IOEXP_GPIO_NR(2, 2)
+
+int setup_max7310(void)
+{
+	/* Must call this function after i2c has setup */
+#ifdef CONFIG_SYS_I2C_MXC
+	gpio_exp_setup_port(1, 2, 0x30);
+	gpio_exp_setup_port(2, 2, 0x32);
+
+	return 0;
+#else
+	return -EPERM;
+#endif
+}
+#endif
+
 static void setup_iomux_uart(void)
 {
 	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
@@ -466,6 +490,11 @@ void do_enable_lvds(struct lcd_panel_info_t const *dev)
 	imx_iomux_v3_setup_multiple_pads(lvds_ctrl_pads,
 							ARRAY_SIZE(lvds_ctrl_pads));
 
+#ifdef CONFIG_MAX7310_IOEXP
+	/* LVDS Enable pin */
+	gpio_exp_direction_output(LVDS_EN_PIN , 1);
+#endif
+
 	/* Set Brightness to high */
 	gpio_direction_output(IMX_GPIO_NR(6, 3) , 1);
 }
@@ -805,6 +834,18 @@ int board_init(void)
 	setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info3);
 #endif
 
+#ifdef CONFIG_MAX7310_IOEXP
+	setup_max7310();
+
+	/* Reset CPU_PER_RST_B signal for enet phy and PCIE */
+	gpio_exp_direction_output(CPU_PER_RST_B, 0);
+	udelay(500);
+	gpio_exp_direction_output(CPU_PER_RST_B, 1);
+
+	/* Set steering signal to L for selecting B0 */
+	gpio_exp_direction_output(STEER_ENET, 0);
+#endif
+
 #ifdef	CONFIG_FEC_MXC
 	setup_fec(CONFIG_FEC_ENET_DEV);
 #endif
diff --git a/include/configs/mx6sxsabreauto.h b/include/configs/mx6sxsabreauto.h
index 40043f8..8caf676 100644
--- a/include/configs/mx6sxsabreauto.h
+++ b/include/configs/mx6sxsabreauto.h
@@ -108,6 +108,11 @@
 #define CONFIG_PMIC_I2C_SLAVE		0x8
 #endif
 
+/* MAX7310 configs*/
+#define CONFIG_MAX7310_IOEXP
+#define CONFIG_IOEXP_DEVICES_NUM 2
+#define CONFIG_IOEXP_DEV_PINS_NUM 8
+
 /* VIDEO */
 #define CONFIG_VIDEO
 
-- 
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