From: Yong Li <sdliyong@xxxxxxxxx>
This patch has been added to the 4.1 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit 9b8e3ec34318663affced3c14d960e78d760dd9a ]
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: stable@xxxxxxxxxxxxxxx
Signed-off-by: Yong Li <sdliyong@xxxxxxxxx>
Reviewed-by: Phil Reid <preid@xxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
drivers/gpio/gpio-pca953x.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index e2da64a..16f7c4f 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -21,6 +21,7 @@
#ifdef CONFIG_OF_GPIO
#include <linux/of_platform.h>
#endif
+#include <asm/unaligned.h>
#define PCA953X_INPUT 0
#define PCA953X_OUTPUT 1
@@ -154,7 +155,7 @@ 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,
--
2.5.0
--
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