Hi Mario,
On Mon, May 23, 2016 at 09:54:56AM +0200, Mario Six wrote:
A bug in the pca953x driver prevents correct reading of GPIO input values beyond the 8th GPIO; all values are reported as zero. Setting of GPIO output values is not affected.
This patch fixes the reading behavior.
Signed-off-by: Mario Six mario.six@gdsys.cc
Reviewed-by: Peng Fan van.freenix@gmail.com
Regards, Peng.
drivers/gpio/pca953x_gpio.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/pca953x_gpio.c b/drivers/gpio/pca953x_gpio.c index 987d10e..3cbfa09 100644 --- a/drivers/gpio/pca953x_gpio.c +++ b/drivers/gpio/pca953x_gpio.c @@ -145,11 +145,13 @@ static int pca953x_get_value(struct udevice *dev, unsigned offset) int ret; u8 val = 0;
- int off = offset % BANK_SZ;
- ret = pca953x_read_single(dev, PCA953X_INPUT, &val, offset); if (ret) return ret;
- return (val >> offset) & 0x1;
- return (val >> off) & 0x1;
}
static int pca953x_set_value(struct udevice *dev, unsigned offset,
2.7.0.GIT