[PATCH v2] mmc: sdhci-of-arasan: Add shutdown callback

[Paul Alvin]

Implement shutdown hook to suspend host and disable all mmc clocks to
increase power saving during shutdown or reboot.

Signed-off-by: Paul Alvin <alvin.paulp at amd.com>
---

Changes in v2:
- Make use of platform suspend instead of driver suspend as driver
  suspend will only get defined if PMC_SLEEP is configured which 
  results in build failure if it is not configured.
- Updated commit description.

 drivers/mmc/host/sdhci-of-arasan.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index 8c29676ab662..4abdad3c4e5b 100644
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -2056,6 +2056,11 @@ static void sdhci_arasan_remove(struct platform_device *pdev)
 	clk_disable_unprepare(clk_ahb);
 }
 
+static void sdhci_arasan_shutdown(struct platform_device *pdev)
+{
+	sdhci_pltfm_suspend(&pdev->dev);
+}
+
 static struct platform_driver sdhci_arasan_driver = {
 	.driver = {
 		.name = "sdhci-arasan",
@@ -2065,6 +2070,7 @@ static struct platform_driver sdhci_arasan_driver = {
 	},
 	.probe = sdhci_arasan_probe,
 	.remove = sdhci_arasan_remove,
+	.shutdown = sdhci_arasan_shutdown,
 };
 
 module_platform_driver(sdhci_arasan_driver);
-- 
2.44.1