Hi Vladimir,
Thanks for the update.
On Fri, Aug 23, 2024 at 01:27:31PM +0300, Vladimir Zapolskiy wrote:
> Omnivision OG01A1B camera sensor is supplied by three power rails,
> if supplies are present as device properties, include them into
> the sensor power up sequence.
>
> Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@xxxxxxxxxx>
> ---
> drivers/media/i2c/og01a1b.c | 86 ++++++++++++++++++++++++++++++++++++-
> 1 file changed, 85 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/og01a1b.c b/drivers/media/i2c/og01a1b.c
> index 90a68201f43f..0150fdd2f424 100644
> --- a/drivers/media/i2c/og01a1b.c
> +++ b/drivers/media/i2c/og01a1b.c
> @@ -9,6 +9,7 @@
> #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-device.h>
> #include <media/v4l2-fwnode.h>
> @@ -422,6 +423,9 @@ static const struct og01a1b_mode supported_modes[] = {
> struct og01a1b {
> struct clk *xvclk;
> struct gpio_desc *reset_gpio;
> + struct regulator *avdd;
> + struct regulator *dovdd;
> + struct regulator *dvdd;
>
> struct v4l2_subdev sd;
> struct media_pad pad;
> @@ -982,11 +986,46 @@ static int og01a1b_power_on(struct device *dev)
> {
> struct v4l2_subdev *sd = dev_get_drvdata(dev);
> struct og01a1b *og01a1b = to_og01a1b(sd);
> + int ret;
> +
> + if (og01a1b->avdd) {
> + ret = regulator_enable(og01a1b->avdd);
> + if (ret)
> + return ret;
> + }
> +
> + if (og01a1b->dovdd) {
> + ret = regulator_enable(og01a1b->dovdd);
> + if (ret)
> + goto avdd_disable;
> + }
> +
> + if (og01a1b->dvdd) {
> + ret = regulator_enable(og01a1b->dvdd);
> + if (ret)
> + goto dovdd_disable;
> + }
>
> gpiod_set_value_cansleep(og01a1b->reset_gpio, 0);
> usleep_range(USEC_PER_MSEC, 2 * USEC_PER_MSEC);
>
> - return clk_prepare_enable(og01a1b->xvclk);
> + ret = clk_prepare_enable(og01a1b->xvclk);
> + if (ret)
> + goto dvdd_disable;
Virtually all sensors require some delay between lifting the reset (which
typically comes after enabling the regulators and the clock) and the first
I²C access. This one appears to require 8192 XCLK cycles.
> +
> + return 0;
> +
> +dvdd_disable:
> + if (og01a1b->dvdd)
> + regulator_disable(og01a1b->dvdd);
> +dovdd_disable:
> + if (og01a1b->dovdd)
> + regulator_disable(og01a1b->dovdd);
> +avdd_disable:
> + if (og01a1b->avdd)
> + regulator_disable(og01a1b->avdd);
> +
> + return ret;
> }
>
> static int og01a1b_power_off(struct device *dev)
> @@ -998,6 +1037,15 @@ static int og01a1b_power_off(struct device *dev)
>
> gpiod_set_value_cansleep(og01a1b->reset_gpio, 1);
>
> + if (og01a1b->dvdd)
> + regulator_disable(og01a1b->dvdd);
> +
> + if (og01a1b->dovdd)
> + regulator_disable(og01a1b->dovdd);
> +
> + if (og01a1b->avdd)
> + regulator_disable(og01a1b->avdd);
> +
> return 0;
> }
>
> @@ -1045,6 +1093,42 @@ static int og01a1b_probe(struct i2c_client *client)
> return PTR_ERR(og01a1b->reset_gpio);
> }
>
> + og01a1b->avdd = devm_regulator_get_optional(&client->dev, "avdd");
> + if (IS_ERR(og01a1b->avdd)) {
> + ret = PTR_ERR(og01a1b->avdd);
> + if (ret != -ENODEV) {
> + dev_err_probe(&client->dev, ret,
> + "Failed to get 'avdd' regulator\n");
> + return ret;
> + }
> +
> + og01a1b->avdd = NULL;
> + }
> +
> + og01a1b->dovdd = devm_regulator_get_optional(&client->dev, "dovdd");
> + if (IS_ERR(og01a1b->dovdd)) {
> + ret = PTR_ERR(og01a1b->dovdd);
> + if (ret != -ENODEV) {
> + dev_err_probe(&client->dev, ret,
> + "Failed to get 'dovdd' regulator\n");
> + return ret;
> + }
> +
> + og01a1b->dovdd = NULL;
> + }
> +
> + og01a1b->dvdd = devm_regulator_get_optional(&client->dev, "dvdd");
> + if (IS_ERR(og01a1b->dvdd)) {
> + ret = PTR_ERR(og01a1b->dvdd);
> + if (ret != -ENODEV) {
> + dev_err_probe(&client->dev, ret,
> + "Failed to get 'dvdd' regulator\n");
> + return ret;
> + }
> +
> + og01a1b->dvdd = NULL;
> + }
> +
> /* The sensor must be powered on to read the CHIP_ID register */
> ret = og01a1b_power_on(&client->dev);
> if (ret)
--
Kind regards,
Sakari Ailus
