From: avinash philip <avinashphilip@xxxxxx>
In low power modes of AM335X platforms, peripherals power is cut off.
This patch supports low power sleep transition support for ELM driver.
Signed-off-by: Philip Avinash <avinashphilip@xxxxxx>
Signed-off-by: Pekon Gupta <pekon@xxxxxx>
---
drivers/mtd/devices/elm.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/mtd/devices/elm.c b/drivers/mtd/devices/elm.c
index dccef9f..171efcd 100644
--- a/drivers/mtd/devices/elm.c
+++ b/drivers/mtd/devices/elm.c
@@ -20,6 +20,7 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/of.h>
+#include <linux/sched.h>
#include <linux/pm_runtime.h>
#include <linux/platform_data/elm.h>
@@ -385,6 +386,23 @@ static int elm_remove(struct platform_device *pdev)
return 0;
}
+static int elm_suspend(struct device *dev)
+{
+ pm_runtime_put_sync(dev);
+ return 0;
+}
+
+static int elm_resume(struct device *dev)
+{
+ struct elm_info *info = dev_get_drvdata(dev);
+
+ pm_runtime_get_sync(dev);
+ elm_config(dev, info->bch_type);
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(elm_pm_ops, elm_suspend, elm_resume);
+
#ifdef CONFIG_OF
static const struct of_device_id elm_of_match[] = {
{ .compatible = "ti,am3352-elm" },
@@ -398,6 +416,7 @@ static struct platform_driver elm_driver = {
.name = "elm",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(elm_of_match),
+ .pm = &elm_pm_ops,
},
.probe = elm_probe,
.remove = elm_remove,
--
1.8.1
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