From: Yong Li <sdliyong@gmail.com>
To: sdliyong@gmail.com, linus.walleij@linaro.org, gnurou@gmail.com,
linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] gpio: pca953x: Use correct u16 value for register word write
Date: Tue, 29 Mar 2016 14:27:32 +0800 [thread overview]
Message-ID: <1459232852-15697-1-git-send-email-sdliyong@gmail.com> (raw)
The current implementation only uses the first byte in *val,
the second data is always 0. Change it to *(u16 *)val
to write the two bytes into the register
Signed-off-by: Yong Li <sdliyong@gmail.com>
---
drivers/gpio/gpio-pca953x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index d0d3065..cf3d410 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -159,7 +159,7 @@ 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, *(u16 *)val);
break;
case PCA957X_TYPE:
ret = i2c_smbus_write_byte_data(chip->client, reg << 1,
--
2.1.4
next reply other threads:[~2016-03-29 6:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-29 6:27 Yong Li [this message]
2016-03-29 12:06 ` [PATCH] gpio: pca953x: Use correct u16 value for register word write Phil Reid
2016-03-29 12:53 ` Yong Li
2016-03-29 14:39 ` Alexander Stein
2016-03-29 16:33 ` Phil Reid
2016-03-30 2:46 ` Yong Li
[not found] ` <CADO9-pdxpQRQQ8RFtjT6rz28GteL3u+at0EGVdNwG8VV48SGEw@mail.gmail.com>
2016-03-30 5:01 ` Yong Li
2016-03-30 5:14 ` Phil Reid
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