[PATCH v5 22/25] media: i2c: imx258: Add support for powerdown gpio

From: git@luigi311.com
To: linux-media@vger.kernel.org
Cc: dave.stevenson@raspberrypi.com, jacopo.mondi@ideasonboard.com,
	mchehab@kernel.org, robh@kernel.org,
	krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
	shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com,
	sakari.ailus@linux.intel.com, devicetree@vger.kernel.org,
	imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, pavel@ucw.cz,
	phone-devel@vger.kernel.org, Ondrej Jirman <megi@xff.cz>,
	Luis Garcia <git@luigi311.com>
Subject: [PATCH v5 22/25] media: i2c: imx258: Add support for powerdown gpio
Date: Wed,  1 May 2024 09:24:39 -0600	[thread overview]
Message-ID: <20240501152442.1072627-23-git@luigi311.com> (raw)
In-Reply-To: <20240501152442.1072627-1-git@luigi311.com>

From: Ondrej Jirman <megi@xff.cz>

On some boards powerdown signal needs to be deasserted for this
sensor to be enabled.

Signed-off-by: Ondrej Jirman <megi@xff.cz>
Signed-off-by: Luis Garcia <git@luigi311.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/media/i2c/imx258.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index f043200e336e..f0bd72f241e4 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -698,6 +698,8 @@ struct imx258 {
 	unsigned int lane_mode_idx;
 	unsigned int csi2_flags;
 
+	struct gpio_desc *powerdown_gpio;
+
 	/*
 	 * Mutex for serialized access:
 	 * Protect sensor module set pad format and start/stop streaming safely.
@@ -1231,6 +1233,8 @@ static int imx258_power_on(struct device *dev)
 	struct imx258 *imx258 = to_imx258(sd);
 	int ret;
 
+	gpiod_set_value_cansleep(imx258->powerdown_gpio, 0);
+
 	ret = regulator_bulk_enable(IMX258_NUM_SUPPLIES,
 				    imx258->supplies);
 	if (ret) {
@@ -1242,6 +1246,7 @@ static int imx258_power_on(struct device *dev)
 	ret = clk_prepare_enable(imx258->clk);
 	if (ret) {
 		dev_err(dev, "failed to enable clock\n");
+		gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
 		regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
 	}
 
@@ -1254,6 +1259,9 @@ static int imx258_power_off(struct device *dev)
 	struct imx258 *imx258 = to_imx258(sd);
 
 	clk_disable_unprepare(imx258->clk);
+
+	gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
+
 	regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
 
 	return 0;
@@ -1559,6 +1567,12 @@ static int imx258_probe(struct i2c_client *client)
 	if (!imx258->variant_cfg)
 		imx258->variant_cfg = &imx258_cfg;
 
+	/* request optional power down pin */
+	imx258->powerdown_gpio = devm_gpiod_get_optional(&client->dev, "powerdown",
+							 GPIOD_OUT_HIGH);
+	if (IS_ERR(imx258->powerdown_gpio))
+		return PTR_ERR(imx258->powerdown_gpio);
+
 	/* Initialize subdev */
 	v4l2_i2c_subdev_init(&imx258->sd, client, &imx258_subdev_ops);
 
-- 
2.44.0

