linux-kernel - [PATCH] media: ov8856: Add runtime PM callbacks

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Date:   Tue, 20 Sep 2022 11:00:01 +0900
From:   Hidenori Kobayashi <hidenorik@...omium.org>
To:     Dongchun Zhu <dongchun.zhu@...iatek.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Hidenori Kobayashi <hidenorik@...omium.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] media: ov8856: Add runtime PM callbacks

There were no runtime PM callbacks registered, leaving regulators being
enabled while the device is suspended on DT systems. Calling existing
power controlling functions from callbacks properly turn them off/on.

Signed-off-by: Hidenori Kobayashi <hidenorik@...omium.org>
---
 drivers/media/i2c/ov8856.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c
index a9728afc81d4..3f57bc30b78b 100644
--- a/drivers/media/i2c/ov8856.c
+++ b/drivers/media/i2c/ov8856.c
@@ -2200,6 +2200,26 @@ static int __maybe_unused ov8856_resume(struct device *dev)
 	return 0;
 }
 
+static int __maybe_unused ov8856_runtime_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct ov8856 *ov8856 = to_ov8856(sd);
+
+	__ov8856_power_off(ov8856);
+
+	return 0;
+}
+
+static int __maybe_unused ov8856_runtime_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct ov8856 *ov8856 = to_ov8856(sd);
+
+	return __ov8856_power_on(ov8856);
+}
+
 static int ov8856_set_format(struct v4l2_subdev *sd,
 			     struct v4l2_subdev_state *sd_state,
 			     struct v4l2_subdev_format *fmt)
@@ -2540,6 +2560,7 @@ static int ov8856_probe(struct i2c_client *client)
 
 static const struct dev_pm_ops ov8856_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(ov8856_suspend, ov8856_resume)
+	SET_RUNTIME_PM_OPS(ov8856_runtime_suspend, ov8856_runtime_resume, NULL)
 };
 
 #ifdef CONFIG_ACPI
-- 
2.37.2.789.g6183377224-goog