extcon: int3496: Set the id pin to direction-input if necessary

With the new more strict ACPI gpio code the dsdt's IoRestriction
flags are honored on gpiod_get, but in some dsdt's it is wrong,
so explicitly call gpiod_direction_input on the id gpio if
necessary.

This fixes the following errors when the int3496 code is used
together with the new more strict ACPI gpio code:

[ 2382.484415] gpio gpiochip1: (INT33FF:01): gpiochip_lock_as_irq: tried to flag a GPIO set as output for IRQ
[ 2382.484425] gpio gpiochip1: (INT33FF:01): unable to lock HW IRQ 3 for IRQ
[ 2382.484429] genirq: Failed to request resources for INT3496:00 (irq 174) on irqchip chv-gpio
[ 2382.484518] intel-int3496 INT3496:00: can't request IRQ for USB ID GPIO: -22
[ 2382.500359] intel-int3496: probe of INT3496:00 failed with error -22

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/drivers/extcon/extcon-intel-int3496.c b/drivers/extcon/extcon-intel-int3496.c
index 00f0e60a00cedb0e4609fde35389e67e8a0da751..9d17984bbbd49a810ac749f06013c282a006c46f 100644 (file)
--- a/drivers/extcon/extcon-intel-int3496.c
+++ b/drivers/extcon/extcon-intel-int3496.c
@@ -113,6 +113,9 @@ static int int3496_probe(struct platform_device *pdev)
                ret = PTR_ERR(data->gpio_usb_id);
                dev_err(dev, "can't request USB ID GPIO: %d\n", ret);
                return ret;
+       } else if (gpiod_get_direction(data->gpio_usb_id) != GPIOF_DIR_IN) {
+               dev_warn(dev, FW_BUG "USB ID GPIO not in input mode, fixing\n");
+               gpiod_direction_input(data->gpio_usb_id);
        }
 
        data->usb_id_irq = gpiod_to_irq(data->gpio_usb_id);