pinctrl: ingenic: Properly detect GPIO direction when configured for IRQ

The PAT1 register contains information about the IRQ type (edge/level)
for input GPIOs with IRQ enabled, and the direction for non-IRQ GPIOs.
So it makes sense to read it only if the GPIO has no interrupt
configured, otherwise input GPIOs configured for level IRQs are
misdetected as output GPIOs.

Fixes: ebd6651418b6 ("pinctrl: ingenic: Implement .get_direction for GPIO chips")
Reported-by: João Henrique <johnnyonflame@hotmail.com>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200622214548.265417-2-paul@crapouillou.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/pinctrl-ingenic.c b/drivers/pinctrl/pinctrl-ingenic.c
index 241e563..a8d1b53 100644 (file)
--- a/drivers/pinctrl/pinctrl-ingenic.c
+++ b/drivers/pinctrl/pinctrl-ingenic.c
@@ -1958,7 +1958,8 @@ static int ingenic_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
        unsigned int pin = gc->base + offset;
 
        if (jzpc->info->version >= ID_JZ4760) {
-               if (ingenic_get_pin_config(jzpc, pin, JZ4760_GPIO_PAT1))
+               if (ingenic_get_pin_config(jzpc, pin, JZ4760_GPIO_INT) ||
+                   ingenic_get_pin_config(jzpc, pin, JZ4760_GPIO_PAT1))
                        return GPIO_LINE_DIRECTION_IN;
                return GPIO_LINE_DIRECTION_OUT;
        }