pca953x_read_single returns ONLY the value of the 8 inputs of the
same bank.
off can have a value from 0 to 15, therefore we have to find the
offset of that gpio within that bank.
Without this patch gpios 8-15 will always be read as zero.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.riba...@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 426c51d..1a7ab13 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -308,7 +308,7 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc,
unsigned off)
return 0;
}
- return (reg_val & (1u << off)) ? 1 : 0;
+ return (reg_val & (1u << (off % BANK_SZ))) ? 1 : 0;
}
static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
--
1.7.10.4
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