This is a note to let you know that I've just added the patch titled
gpio: mxc: Always set GPIOs used as interrupt source to INPUT mode
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
gpio-mxc-always-set-gpios-used-as-interrupt-source-t.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9848804bc4d914ea9ace5fa973bef60faab9175c
Author: Marek Vasut <marex@xxxxxxx>
Date: Mon Jan 16 10:49:57 2023 +0100
gpio: mxc: Always set GPIOs used as interrupt source to INPUT mode
[ Upstream commit 8e88a0feebb241cab0253698b2f7358b6ebec802 ]
Always configure GPIO pins which are used as interrupt source as INPUTs.
In case the default pin configuration is OUTPUT, or the prior stage does
configure the pins as OUTPUT, then Linux will not reconfigure the pin as
INPUT and no interrupts are received.
Always configure the interrupt source GPIO pin as input to fix the above case.
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Fixes: 07bd1a6cc7cbb ("MXC arch: Add gpio support for the whole platform")
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index c77d474185f3..2e4b6b176875 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -229,7 +229,7 @@ static int gpio_set_irq_type(struct irq_data *d, u32 type)
writel(1 << gpio_idx, port->base + GPIO_ISR);
- return 0;
+ return port->gc.direction_input(&port->gc, gpio_idx);
}
static void mxc_flip_edge(struct mxc_gpio_port *port, u32 gpio)
