gpio: pca953x: Use correct u16 value for register word write

The current implementation only uses the first byte in val, the second byte is always 0. Change it to use cpu_to_le16 to write the two bytes into the register Cc: [email protected] Signed-off-by: Yong Li <[email protected]> Reviewed-by: Phil Reid <[email protected]> Signed-off-by: Linus Walleij <[email protected]>
chewitt · Apr 8, 2016 · 9b8e3ec · 9b8e3ec
1 parent 159f3cd
commit 9b8e3ec
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
@@ -18,6 +18,7 @@
 #include <linux/i2c.h>
 #include <linux/platform_data/pca953x.h>
 #include <linux/slab.h>
+#include <asm/unaligned.h>
 #include <linux/of_platform.h>
 #include <linux/acpi.h>
 
@@ -159,7 +160,7 @@ static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val)
 		switch (chip->chip_type) {
 		case PCA953X_TYPE:
 			ret = i2c_smbus_write_word_data(chip->client,
-							reg << 1, (u16) *val);
+			    reg << 1, cpu_to_le16(get_unaligned((u16 *)val)));
 			break;
 		case PCA957X_TYPE:
 			ret = i2c_smbus_write_byte_data(chip->client, reg << 1,