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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Mika Westerberg <mika.westerberg@linux.intel.com>,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        Sasha Levin <alexander.levin@verizon.com>
Subject: [PATCH 4.14 099/159] iio: proximity: sx9500: Assign interrupt from GpioIo()
Date:   Fri, 23 Feb 2018 19:26:47 +0100
Message-Id: <20180223170755.443076295@linuxfoundation.org>
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4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>


[ 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>
---
 drivers/iio/proximity/sx9500.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/drivers/iio/proximity/sx9500.c
+++ b/drivers/iio/proximity/sx9500.c
@@ -871,6 +871,7 @@ static int sx9500_init_device(struct iio
 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
 
 	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");