spi: spi-ath79: Add device tree support

Set the OF node of the spi controller and use the generic GPIO based
chip select instead of the custom controller data. As the controller
data isn't used by any board just drop it.

Signed-off-by: Alban Bedel <albeu@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 11 insertions, 9 deletions

diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c
index b02eb4ac0218..239bc31d6791 100644
--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -79,10 +79,8 @@ static void ath79_spi_chipselect(struct spi_device *spi, int is_active)
         }
 
         if (spi->chip_select) {
-                struct ath79_spi_controller_data *cdata = spi->controller_data;
-
                 /* SPI is normally active-low */
-                gpio_set_value(cdata->gpio, cs_high);
+                gpio_set_value(spi->cs_gpio, cs_high);
         } else {
                 if (cs_high)
                         sp->ioc_base |= AR71XX_SPI_IOC_CS0;
@@ -117,11 +115,9 @@ static void ath79_spi_disable(struct ath79_spi *sp)
 
 static int ath79_spi_setup_cs(struct spi_device *spi)
 {
-        struct ath79_spi_controller_data *cdata;
         int status;
 
-        cdata = spi->controller_data;
-        if (spi->chip_select && !cdata)
+        if (spi->chip_select && !gpio_is_valid(spi->cs_gpio))
                 return -EINVAL;
 
         status = 0;
@@ -134,7 +130,7 @@ static int ath79_spi_setup_cs(struct spi_device *spi)
                 else
                         flags |= GPIOF_INIT_HIGH;
 
-                status = gpio_request_one(cdata->gpio, flags,
+                status = gpio_request_one(spi->cs_gpio, flags,
                                           dev_name(&spi->dev));
         }
 
@@ -144,8 +140,7 @@ static int ath79_spi_setup_cs(struct spi_device *spi)
 static void ath79_spi_cleanup_cs(struct spi_device *spi)
 {
         if (spi->chip_select) {
-                struct ath79_spi_controller_data *cdata = spi->controller_data;
-                gpio_free(cdata->gpio);
+                gpio_free(spi->cs_gpio);
         }
 }
 
@@ -217,6 +212,7 @@ static int ath79_spi_probe(struct platform_device *pdev)
         }
 
         sp = spi_master_get_devdata(master);
+        master->dev.of_node = pdev->dev.of_node;
         platform_set_drvdata(pdev, sp);
 
         pdata = dev_get_platdata(&pdev->dev);
@@ -301,12 +297,18 @@ static void ath79_spi_shutdown(struct platform_device *pdev)
         ath79_spi_remove(pdev);
 }
 
+static const struct of_device_id ath79_spi_of_match[] = {
+        { .compatible = "qca,ar7100-spi", },
+        { },
+};
+
 static struct platform_driver ath79_spi_driver = {
         .probe          = ath79_spi_probe,
         .remove         = ath79_spi_remove,
         .shutdown       = ath79_spi_shutdown,
         .driver         = {
                 .name   = DRV_NAME,
+                .of_match_table = ath79_spi_of_match,
         },
 };
 module_platform_driver(ath79_spi_driver);