iio: proximity: sx9500: Assign interrupt from GpioIo()

[ Upstream commit e53111ad5deaef98d8c18a9933ef1f5624c5979d ]

The commit 0f0796509c07

("iio: remove gpio interrupt probing from drivers that use a single interrupt")

removed custom IRQ assignment for the drivers which are enumerated via
ACPI or OF. Unfortunately, some ACPI tables have IRQ line defined as
GpioIo() resource and thus automatic IRQ allocation will fail.

Partially revert the commit 0f0796509c07 to restore original behaviour.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/proximity/sx9500.c b/drivers/iio/proximity/sx9500.c
index f42b3a1..dba796c 100644 (file)
--- a/drivers/iio/proximity/sx9500.c
+++ b/drivers/iio/proximity/sx9500.c
@@ -871,6 +871,7 @@ static int sx9500_init_device(struct iio_dev *indio_dev)
 static void sx9500_gpio_probe(struct i2c_client *client,
                              struct sx9500_data *data)
 {
+       struct gpio_desc *gpiod_int;
        struct device *dev;
 
        if (!client)
@@ -878,6 +879,14 @@ static void sx9500_gpio_probe(struct i2c_client *client,
 
        dev = &client->dev;
 
+       if (client->irq <= 0) {
+               gpiod_int = devm_gpiod_get(dev, SX9500_GPIO_INT, GPIOD_IN);
+               if (IS_ERR(gpiod_int))
+                       dev_err(dev, "gpio get irq failed\n");
+               else
+                       client->irq = gpiod_to_irq(gpiod_int);
+       }
+
        data->gpiod_rst = devm_gpiod_get(dev, SX9500_GPIO_RESET, GPIOD_OUT_HIGH);
        if (IS_ERR(data->gpiod_rst)) {
                dev_warn(dev, "gpio get reset pin failed\n");