From dba785798526a3282cc4d0f0ea751883715dbbb4 Mon Sep 17 00:00:00 2001 From: Puyou Lu Date: Fri, 6 May 2022 16:06:30 +0800 Subject: gpio: pca953x: fix irq_stat not updated when irq is disabled (irq_mask not set) When one port's input state get inverted (eg. from low to hight) after pca953x_irq_setup but before setting irq_mask (by some other driver such as "gpio-keys"), the next inversion of this port (eg. from hight to low) will not be triggered any more (because irq_stat is not updated at the first time). Issue should be fixed after this commit. Fixes: 89ea8bbe9c3e ("gpio: pca953x.c: add interrupt handling capability") Signed-off-by: Puyou Lu Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpio-pca953x.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index d2fe76f3f34f..8726921a1129 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -762,11 +762,11 @@ static bool pca953x_irq_pending(struct pca953x_chip *chip, unsigned long *pendin bitmap_xor(cur_stat, new_stat, old_stat, gc->ngpio); bitmap_and(trigger, cur_stat, chip->irq_mask, gc->ngpio); + bitmap_copy(chip->irq_stat, new_stat, gc->ngpio); + if (bitmap_empty(trigger, gc->ngpio)) return false; - bitmap_copy(chip->irq_stat, new_stat, gc->ngpio); - bitmap_and(cur_stat, chip->irq_trig_fall, old_stat, gc->ngpio); bitmap_and(old_stat, chip->irq_trig_raise, new_stat, gc->ngpio); bitmap_or(new_stat, old_stat, cur_stat, gc->ngpio); -- cgit v1.2.3