From: João H. Spies jhlspies@gmail.com
[ Upstream commit b871656aa4f54e04207f62bdd0d7572be1d86b36 ]
Switching between falling/rising edges for IRQ_TYPE_EDGE_BOTH on pins that require debounce can cause the device to lose events due to a desync between pin state and irq type.
This problem is resolved by switching between IRQ_TYPE_LEVEL_LOW and IRQ_TYPE_LEVEL_HIGH instead.
Fixes: 936ee2675eee ("gpio/rockchip: add driver for rockchip gpio") Signed-off-by: João H. Spies jhlspies@gmail.com Link: https://lore.kernel.org/r/20220808025121.110223-1-jhlspies@gmail.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpio/gpio-rockchip.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c index e342a6dc4c6c..bb953f647864 100644 --- a/drivers/gpio/gpio-rockchip.c +++ b/drivers/gpio/gpio-rockchip.c @@ -418,11 +418,11 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type) goto out; } else { bank->toggle_edge_mode |= mask; - level |= mask; + level &= ~mask;
/* * Determine gpio state. If 1 next interrupt should be - * falling otherwise rising. + * low otherwise high. */ data = readl(bank->reg_base + bank->gpio_regs->ext_port); if (data & mask)