[PATCH v1 7/8] spi: pxa2xx: Refactor _UID handling to use acpi_dev_uid_to_integer()

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

ACPI utils provide acpi_dev_uid_to_integer() helper to extract _UID as
an integer. Use it instead of custom approach.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/spi/spi-pxa2xx.c | 34 +++++++++-------------------------
 1 file changed, 9 insertions(+), 25 deletions(-)

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index 4749dd598ec2..01a513d6c6b0 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1321,30 +1321,6 @@ static void cleanup(struct spi_device *spi)
 	kfree(chip);
 }
 
-#ifdef CONFIG_ACPI
-
-static int pxa2xx_spi_get_port_id(struct device *dev)
-{
-	struct acpi_device *adev;
-	unsigned int devid;
-	int port_id = -1;
-
-	adev = ACPI_COMPANION(dev);
-	if (adev && adev->pnp.unique_id &&
-	    !kstrtouint(adev->pnp.unique_id, 0, &devid))
-		port_id = devid;
-	return port_id;
-}
-
-#else /* !CONFIG_ACPI */
-
-static int pxa2xx_spi_get_port_id(struct device *dev)
-{
-	return -1;
-}
-
-#endif /* CONFIG_ACPI */
-
 static bool pxa2xx_spi_idma_filter(struct dma_chan *chan, void *param)
 {
 	return param == chan->device->dev;
@@ -1354,12 +1330,15 @@ static struct pxa2xx_spi_controller *
 pxa2xx_spi_init_pdata(struct platform_device *pdev)
 {
 	struct pxa2xx_spi_controller *pdata;
+	struct device *dev = &pdev->dev;
 	struct ssp_device *ssp;
 	struct resource *res;
 	struct device *parent = pdev->dev.parent;
 	u32 value = SSP_UNDEFINED;
 	enum pxa_ssp_type type;
 	const void *match;
+	int status;
+	u64 uid;
 
 	/* Always try to read property */
 	device_property_read_u32(&pdev->dev, "intel,spi-pxa2xx-type", &value);
@@ -1402,7 +1381,12 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
 
 	ssp->type = type;
 	ssp->dev = &pdev->dev;
-	ssp->port_id = pxa2xx_spi_get_port_id(&pdev->dev);
+
+	status = acpi_dev_uid_to_integer(ACPI_COMPANION(dev), &uid);
+	if (status)
+		ssp->port_id = -1;
+	else
+		ssp->port_id = uid;
 
 	pdata->is_slave = device_property_read_bool(&pdev->dev, "spi-slave");
 	pdata->num_chipselect = 1;
-- 
2.35.1