From: Stefan Wahren <wahrenst@gmx.net>
Date: Mon, 2 Dec 2024 11:51:40 +0000 (+0100)
Subject: mmc: bcm2835: add suspend/resume pm support
X-Git-Tag: v6.14-rc1~153^2~17
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=aee2ae1423a2f147d28075499af5d9bf063774c5;p=thirdparty%2Fkernel%2Flinux.git

mmc: bcm2835: add suspend/resume pm support

Add a minimalistic suspend/resume PM support.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Message-ID: <20241202115140.33492-1-wahrenst@gmx.net>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

diff --git a/drivers/mmc/host/bcm2835.c b/drivers/mmc/host/bcm2835.c
index 7847f0c8b4652..e5f151d092cd3 100644
--- a/drivers/mmc/host/bcm2835.c
+++ b/drivers/mmc/host/bcm2835.c
@@ -1343,6 +1343,25 @@ static int bcm2835_add_host(struct bcm2835_host *host)
 	return 0;
 }
 
+static int bcm2835_suspend(struct device *dev)
+{
+	struct bcm2835_host *host = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(host->clk);
+
+	return 0;
+}
+
+static int bcm2835_resume(struct device *dev)
+{
+	struct bcm2835_host *host = dev_get_drvdata(dev);
+
+	return clk_prepare_enable(host->clk);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(bcm2835_pm_ops, bcm2835_suspend,
+				bcm2835_resume);
+
 static int bcm2835_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -1471,6 +1490,7 @@ static struct platform_driver bcm2835_driver = {
 		.name		= "sdhost-bcm2835",
 		.probe_type	= PROBE_PREFER_ASYNCHRONOUS,
 		.of_match_table	= bcm2835_match,
+		.pm = pm_ptr(&bcm2835_pm_ops),
 	},
 };
 module_platform_driver(bcm2835_driver);