Commit 3bc80e89 authored by Dave Stevenson's avatar Dave Stevenson Committed by Mauro Carvalho Chehab
Browse files

media: i2c: ov9282: Add support for regulators. 



The sensor takes 3 supply rails - AVDD, DVDD, and DOVDD.

Add hooks into the regulator framework for each of these
regulators.

Signed-off-by: default avatarDave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent 91707453

drivers/media/i2c/ov9282.c

+38 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/pm_runtime.h>

#include <linux/regulator/consumer.h>



#include <media/v4l2-ctrls.h>

#include <media/v4l2-event.h>
@@ -91,6 +92,14 @@ 
#define OV9282_REG_MIN		0x00

#define OV9282_REG_MAX		0xfffff



static const char * const ov9282_supply_names[] = {

	"avdd",		/* Analog power */

	"dovdd",	/* Digital I/O power */

	"dvdd",		/* Digital core power */

};



#define OV9282_NUM_SUPPLIES ARRAY_SIZE(ov9282_supply_names)



/**

 * struct ov9282_reg - ov9282 sensor register

 * @address: Register address
@@ -162,6 +171,7 @@ struct ov9282 { 
	struct media_pad pad;

	struct gpio_desc *reset_gpio;

	struct clk *inclk;

	struct regulator_bulk_data supplies[OV9282_NUM_SUPPLIES];

	struct v4l2_ctrl_handler ctrl_handler;

	struct v4l2_ctrl *link_freq_ctrl;

	struct v4l2_ctrl *hblank_ctrl;
@@ -1081,6 +1091,18 @@ static int ov9282_detect(struct ov9282 *ov9282) 
	return 0;

}



static int ov9282_configure_regulators(struct ov9282 *ov9282)

{

	unsigned int i;



	for (i = 0; i < OV9282_NUM_SUPPLIES; i++)

		ov9282->supplies[i].supply = ov9282_supply_names[i];



	return devm_regulator_bulk_get(ov9282->dev,

				       OV9282_NUM_SUPPLIES,

				       ov9282->supplies);

}



/**

 * ov9282_parse_hw_config() - Parse HW configuration and check if supported

 * @ov9282: pointer to ov9282 device
@@ -1117,6 +1139,12 @@ static int ov9282_parse_hw_config(struct ov9282 *ov9282) 
		return PTR_ERR(ov9282->inclk);

	}



	ret = ov9282_configure_regulators(ov9282);

	if (ret) {

		dev_err(ov9282->dev, "Failed to get power regulators\n");

		return ret;

	}



	rate = clk_get_rate(ov9282->inclk);

	if (rate != OV9282_INCLK_RATE) {

		dev_err(ov9282->dev, "inclk frequency mismatch");
@@ -1198,6 +1226,12 @@ static int ov9282_power_on(struct device *dev) 
	struct ov9282 *ov9282 = to_ov9282(sd);

	int ret;



	ret = regulator_bulk_enable(OV9282_NUM_SUPPLIES, ov9282->supplies);

	if (ret < 0) {

		dev_err(dev, "Failed to enable regulators\n");

		return ret;

	}



	usleep_range(400, 600);



	gpiod_set_value_cansleep(ov9282->reset_gpio, 1);
@@ -1223,6 +1257,8 @@ static int ov9282_power_on(struct device *dev) 
error_reset:

	gpiod_set_value_cansleep(ov9282->reset_gpio, 0);



	regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies);



	return ret;

}
@@ -1241,6 +1277,8 @@ static int ov9282_power_off(struct device *dev) 


	clk_disable_unprepare(ov9282->inclk);



	regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies);



	return 0;

}