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gpio: pca953x: Fix AI overflow on PCAL6524

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The PCAL_PINCTRL_MASK is too large. The extended register block on
PCAL6524, which is the largest chip with this block, has the block
limited to address range 0x40..0x7f. This is because the bit 7 in
the command register is used for the Address Increment functionality.

Trim the mask to 0x60 to match the datasheet and to prevent accidental
overwrite of the AI bit.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Marek Vasut 2018-12-12 02:39:50 +01:00 committed by Linus Walleij
parent 873d1e8e6f
commit 92f45ebe68
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-pca953x.c
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@ -58,7 +58,7 @@
#define PCA_GPIO_MASK 0x00FF
#define PCAL_GPIO_MASK 0x1f
#define PCAL_PINCTRL_MASK 0xe0
#define PCAL_PINCTRL_MASK 0x60
#define PCA_INT 0x0100
#define PCA_PCAL 0x0200