From: Vignesh R <[email protected]> commit a246b8198f776a16d1d3a3bbfc2d437bad766b29 upstream.
NBANK() macro assumes that ngpios is a multiple of 8(BANK_SZ) and hence results in 0 banks for PCA9536 which has just 4 gpios. This is wrong as PCA9356 has 1 bank with 4 gpios. This results in uninitialized PCA953X_INVERT register. Fix this by using DIV_ROUND_UP macro in NBANK(). Cc: [email protected] Signed-off-by: Vignesh R <[email protected]> Signed-off-by: Linus Walleij <[email protected]> Signed-off-by: Willy Tarreau <[email protected]> --- 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..ac11e45 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -75,7 +75,7 @@ MODULE_DEVICE_TABLE(i2c, pca953x_id); #define MAX_BANK 5 #define BANK_SZ 8 -#define NBANK(chip) (chip->gpio_chip.ngpio / BANK_SZ) +#define NBANK(chip) DIV_ROUND_UP(chip->gpio_chip.ngpio, BANK_SZ) struct pca953x_chip { unsigned gpio_start; -- 2.8.0.rc2.1.gbe9624a
