cm_t335: add support for pca9555 i2c gpio extender

Add support for the 16 bits pca9555 i2c to gpio extender featured
by the SB-T335 baseboard.

Signed-off-by: Ilya Ledvich <ilya@compulab.co.il>
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>

include/configs/cm_t335.h

@@ -166,5 +166,17 @@
 #define STATUS_LED_PERIOD		(CONFIG_SYS_HZ / 2)
 #define STATUS_LED_BOOT			0
 
+#ifndef CONFIG_SPL_BUILD
+/*
+ * Enable PCA9555 at I2C0-0x26.
+ * First select the I2C0 bus with "i2c dev 0", then use "pca953x" command.
+ */
+#define CONFIG_PCA953X
+#define CONFIG_CMD_PCA953X
+#define CONFIG_CMD_PCA953X_INFO
+#define CONFIG_SYS_I2C_PCA953X_ADDR	0x26
+#define CONFIG_SYS_I2C_PCA953X_WIDTH	{ {0x26, 16} }
+#endif /* CONFIG_SPL_BUILD */
+
 #endif	/* __CONFIG_CM_T335_H */