spi: rspi: Add runtime PM support, using spi core auto_runtime_pm

Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 5 insertions, 7 deletions

diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index 92bec7e91046..1fb0ad213324 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -33,6 +33,7 @@
 #include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
 #include <linux/of_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/sh_dma.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/rspi.h>
@@ -1111,7 +1112,7 @@ static int rspi_remove(struct platform_device *pdev)
         struct rspi_data *rspi = platform_get_drvdata(pdev);
 
         rspi_release_dma(rspi);
-        clk_disable_unprepare(rspi->clk);
+        pm_runtime_disable(&pdev->dev);
 
         return 0;
 }
@@ -1242,16 +1243,13 @@ static int rspi_probe(struct platform_device *pdev)
                 goto error1;
         }
 
-        ret = clk_prepare_enable(rspi->clk);
-        if (ret < 0) {
-                dev_err(&pdev->dev, "unable to prepare/enable clock\n");
-                goto error1;
-        }
+        pm_runtime_enable(&pdev->dev);
 
         init_waitqueue_head(&rspi->wait);
 
         master->bus_num = pdev->id;
         master->setup = rspi_setup;
+        master->auto_runtime_pm = true;
         master->transfer_one = ops->transfer_one;
         master->prepare_message = rspi_prepare_message;
         master->unprepare_message = rspi_unprepare_message;
@@ -1312,7 +1310,7 @@ static int rspi_probe(struct platform_device *pdev)
 error3:
         rspi_release_dma(rspi);
 error2:
-        clk_disable_unprepare(rspi->clk);
+        pm_runtime_disable(&pdev->dev);
 error1:
         spi_master_put(master);