linux-kernel - [PATCH 07/13] media: i2c: ov5647: Add support for regulator control.

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Message-Id: <20251028-b4-rpi-ov5647-v1-7-098413454f5e@ideasonboard.com>
Date: Tue, 28 Oct 2025 12:57:18 +0530
From: Jai Luthra <jai.luthra@...asonboard.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Dave Stevenson <dave.stevenson@...pberrypi.com>, 
 Jacopo Mondi <jacopo@...ndi.org>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Mauro Carvalho Chehab <mchehab+huawei@...nel.org>, 
 Kieran Bingham <kieran.bingham@...asonboard.com>, 
 David Plowman <david.plowman@...pberrypi.com>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Peter Robinson <pbrobinson@...il.com>, Stefan Wahren <wahrenst@....net>, 
 "Ivan T. Ivanov" <iivanov@...e.de>, 
 Jai Luthra <jai.luthra@...asonboard.com>
Subject: [PATCH 07/13] media: i2c: ov5647: Add support for regulator
 control.

From: Dave Stevenson <dave.stevenson@...pberrypi.com>

The driver supported using GPIOs to control the shutdown line,
but no regulator control.

Add regulator hooks.

Signed-off-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
Signed-off-by: Jai Luthra <jai.luthra@...asonboard.com>
---
 drivers/media/i2c/ov5647.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c
index a33e2d8edc114d302e830639cb7cb161f16a6208..598764638d518a28c8ac61ea590b996f09ecd45c 100644
--- a/drivers/media/i2c/ov5647.c
+++ b/drivers/media/i2c/ov5647.c
@@ -20,6 +20,7 @@
 #include <linux/module.h>
 #include <linux/of_graph.h>
 #include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-ctrls.h>
@@ -83,6 +84,15 @@
 #define OV5647_EXPOSURE_DEFAULT		1000
 #define OV5647_EXPOSURE_MAX		65535
 
+/* regulator supplies */
+static const char * const ov5647_supply_names[] = {
+	"avdd",		/* Analog power */
+	"dovdd",	/* Digital I/O power */
+	"dvdd",		/* Digital core power */
+};
+
+#define OV5647_NUM_SUPPLIES ARRAY_SIZE(ov5647_supply_names)
+
 struct regval_list {
 	u16 addr;
 	u8 data;
@@ -104,6 +114,7 @@ struct ov5647 {
 	struct mutex			lock;
 	struct clk			*xclk;
 	struct gpio_desc		*pwdn;
+	struct regulator_bulk_data supplies[OV5647_NUM_SUPPLIES];
 	bool				clock_ncont;
 	struct v4l2_ctrl_handler	ctrls;
 	const struct ov5647_mode	*mode;
@@ -781,6 +792,12 @@ static int ov5647_power_on(struct device *dev)
 
 	dev_dbg(dev, "OV5647 power on\n");
 
+	ret = regulator_bulk_enable(OV5647_NUM_SUPPLIES, sensor->supplies);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable regulators\n");
+		return ret;
+	}
+
 	if (sensor->pwdn) {
 		gpiod_set_value_cansleep(sensor->pwdn, 0);
 		msleep(PWDN_ACTIVE_DELAY_MS);
@@ -812,6 +829,7 @@ static int ov5647_power_on(struct device *dev)
 	clk_disable_unprepare(sensor->xclk);
 error_pwdn:
 	gpiod_set_value_cansleep(sensor->pwdn, 1);
+	regulator_bulk_disable(OV5647_NUM_SUPPLIES, sensor->supplies);
 
 	return ret;
 }
@@ -841,6 +859,7 @@ static int ov5647_power_off(struct device *dev)
 
 	clk_disable_unprepare(sensor->xclk);
 	gpiod_set_value_cansleep(sensor->pwdn, 1);
+	regulator_bulk_disable(OV5647_NUM_SUPPLIES, sensor->supplies);
 
 	return 0;
 }
@@ -1341,6 +1360,18 @@ static const struct v4l2_ctrl_ops ov5647_ctrl_ops = {
 	.s_ctrl = ov5647_s_ctrl,
 };
 
+static int ov5647_configure_regulators(struct device *dev,
+				       struct ov5647 *sensor)
+{
+	unsigned int i;
+
+	for (i = 0; i < OV5647_NUM_SUPPLIES; i++)
+		sensor->supplies[i].supply = ov5647_supply_names[i];
+
+	return devm_regulator_bulk_get(dev, OV5647_NUM_SUPPLIES,
+				       sensor->supplies);
+}
+
 static int ov5647_init_controls(struct ov5647 *sensor, struct device *dev)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
@@ -1489,6 +1520,12 @@ static int ov5647_probe(struct i2c_client *client)
 		return -EINVAL;
 	}
 
+	ret = ov5647_configure_regulators(dev, sensor);
+	if (ret) {
+		dev_err(dev, "Failed to get power regulators\n");
+		return ret;
+	}
+
 	mutex_init(&sensor->lock);
 
 	sensor->mode = OV5647_DEFAULT_MODE;

-- 
2.51.0