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

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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@vger.kernel.org
Signed-off-by: Yong Li <sdliyong@gmail.com>
Reviewed-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Yong Li 2016-03-30 14:49:14 +08:00 committed by Linus Walleij
parent 159f3cd92f
commit 9b8e3ec343
1 changed files with 2 additions and 1 deletions
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3
drivers/gpio/gpio-pca953x.c
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@ -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,