From fc3df7cb3e1f5e220a84cae3b184921d5fdbbd6f Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Wed, 12 Dec 2018 02:39:50 +0100 Subject: [PATCH] gpio: pca953x: Fix AI overflow on PCAL6524 [ Upstream commit 92f45ebe68181c2d7f76633ffae55bc9447d62cd ] 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 Reviewed-by: Bartosz Golaszewski Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin --- 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 e0657fc72d31..0232c25a1586 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -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 -- 2.11.0