[PATCH platform-next 12/16] platform: mellanox: mlx-platform: Get interrupt line through ACPI

[Vadim Pasternak <vadimp@xxxxxxxxxx>]

Add support for getting system interrupt line from ACPI table.

Signed-off-by: Vadim Pasternak <vadimp@xxxxxxxxxx>
Reviewed-by: Michael Shych <michaelsh@xxxxxxxxxx>
---
 drivers/platform/x86/mlx-platform.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index e2226c218a54..a70b86e60721 100644
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -342,6 +342,7 @@
  * @hotplug_resources: system hotplug resources
  * @hotplug_resources_size: size of system hotplug resources
  * @hi2c_main_init_status: init status of I2C main bus
+ * @irq_fpga: FPGA IRQ number
  */
 struct mlxplat_priv {
 	struct platform_device *pdev_i2c;
@@ -355,6 +356,7 @@ struct mlxplat_priv {
 	struct resource *hotplug_resources;
 	unsigned int hotplug_resources_size;
 	u8 i2c_main_init_status;
+	int irq_fpga;
 };
 
 static struct platform_device *mlxplat_dev;
@@ -6187,6 +6189,8 @@ static int mlxplat_post_init(struct mlxplat_priv *priv)
 	/* Add hotplug driver */
 	if (mlxplat_hotplug) {
 		mlxplat_hotplug->regmap = priv->regmap;
+		if (priv->irq_fpga)
+			mlxplat_hotplug->irq = priv->irq_fpga;
 		priv->pdev_hotplug =
 		platform_device_register_resndata(&mlxplat_dev->dev,
 						  "mlxreg-hotplug", PLATFORM_DEVID_NONE,
@@ -6395,11 +6399,17 @@ static int mlxplat_probe(struct platform_device *pdev)
 {
 	unsigned int hotplug_resources_size = 0;
 	struct resource *hotplug_resources = NULL;
+	struct acpi_device *acpi_dev;
 	struct mlxplat_priv *priv;
-	int i, err;
+	int irq_fpga = 0, i, err;
 
-	if (ACPI_COMPANION(&pdev->dev))
+	acpi_dev = ACPI_COMPANION(&pdev->dev);
+	if (acpi_dev) {
+		irq_fpga = acpi_dev_gpio_irq_get(acpi_dev, 0);
+		if (irq_fpga < 0)
+			return -ENODEV;
 		mlxplat_dev = pdev;
+	}
 
 	err = mlxplat_pre_init(&hotplug_resources, &hotplug_resources_size);
 	if (err)
@@ -6414,6 +6424,7 @@ static int mlxplat_probe(struct platform_device *pdev)
 	platform_set_drvdata(mlxplat_dev, priv);
 	priv->hotplug_resources = hotplug_resources;
 	priv->hotplug_resources_size = hotplug_resources_size;
+	priv->irq_fpga = irq_fpga;
 
 	if (!mlxplat_regmap_config)
 		mlxplat_regmap_config = &mlxplat_mlxcpld_regmap_config;
-- 
2.20.1