gpiolib: acpi: support bias pull disable

On top of looking at PULL_UP and PULL_DOWN flags, also look at
PULL_DISABLE and set the appropriate GPIO flag. The GPIO core will then
pass down this to controllers that support it.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index c2523ac..9be1376 100644 (file)
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -687,6 +687,9 @@ int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
        case ACPI_PIN_CONFIG_PULLDOWN:
                *lookupflags |= GPIO_PULL_DOWN;
                break;
+       case ACPI_PIN_CONFIG_NOPULL:
+               *lookupflags |= GPIO_PULL_DISABLE;
+               break;
        default:
                break;
        }