mx6sabreauto: Do not enable WEIM by default

WEIM cannot be used when I2C3 is enabled due to pin conflict, so keep
WEIM disabled by default.

I2C3 controls GPIO I2C expander (USB host and OTG have VBUS controlled by
the GPIO I2C expander), magnetometer, accelerometer.

Not disabling WEIM in U-Boot causes I2C3 to behave badly when booting
a NXP 4.1 kernel, which leads to probe failure on several devices,
including the lack of USB:

imx_usb 2184000.usb: Can't register ci_hdrc platform device, err=-517

By keeping WEIM disabled in U-Boot these kernel issues are gone.

Reported-by: Takashi Matsuzawa <tmatsuzawa@xevo.com>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

board/freescale/mx6sabreauto/mx6sabreauto.c

@@ -197,6 +197,7 @@ static int port_exp_direction_output(unsigned gpio, int value)
 	return 0;
 }
 
+#ifdef CONFIG_MTD_NOR_FLASH
 static iomux_v3_cfg_t const eimnor_pads[] = {
 	IOMUX_PADS(PAD_EIM_D16__EIM_DATA16	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL)),
 	IOMUX_PADS(PAD_EIM_D17__EIM_DATA17	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL)),
@@ -292,6 +293,7 @@ static void setup_iomux_eimnor(void)
 
 	eimnor_cs_setup();
 }
+#endif
 
 static void setup_iomux_enet(void)
 {
@@ -571,8 +573,10 @@ int board_early_init_f(void)
 #ifdef CONFIG_NAND_MXS
 	setup_gpmi_nand();
 #endif
-	eim_clk_setup();
 
+#ifdef CONFIG_MTD_NOR_FLASH
+	eim_clk_setup();
+#endif
 	return 0;
 }
 
@@ -601,7 +605,10 @@ int board_init(void)
 #ifdef CONFIG_VIDEO_IPUV3
 	setup_display();
 #endif
+
+#ifdef CONFIG_MTD_NOR_FLASH
 	setup_iomux_eimnor();
+#endif
 	return 0;
 }
 

configs/mx6sabreauto_defconfig

@@ -38,7 +38,7 @@ CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_DFU_MMC=y
 CONFIG_DFU_SF=y
-CONFIG_MTD_NOR_FLASH=y
+# CONFIG_MTD_NOR_FLASH is not set
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_USB=y

include/configs/mx6sabreauto.h

@@ -31,6 +31,7 @@
 
 #include "mx6sabre_common.h"
 
+#ifdef CONFIG_MTD_NOR_FLASH
 #define CONFIG_SYS_FLASH_BASE           WEIM_ARB_BASE_ADDR
 #define CONFIG_SYS_FLASH_SECT_SIZE      (128 * 1024)
 #define CONFIG_SYS_MAX_FLASH_BANKS 1    /* max number of memory banks */
@@ -40,6 +41,7 @@
 #define CONFIG_SYS_FLASH_USE_BUFFER_WRITE /* Use buffered writes*/
 #define CONFIG_SYS_FLASH_EMPTY_INFO
 #define CONFIG_SYS_FLASH_CFI_WIDTH	FLASH_CFI_16BIT
+#endif
 
 #define CONFIG_SYS_FSL_USDHC_NUM	2
 #if defined(CONFIG_ENV_IS_IN_MMC)