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From:   Hidenori Kobayashi <hidenorik@chromium.org>
To:     Dongchun Zhu <dongchun.zhu@mediatek.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>
Cc:     Hidenori Kobayashi <hidenorik@chromium.org>,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] media: ov8856: Add runtime PM callbacks
Date:   Tue, 20 Sep 2022 11:00:01 +0900
Message-Id: <20220920020002.710533-1-hidenorik@chromium.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
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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@chromium.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