diff options
| author | Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org> | 2024-08-30 09:34:58 +0300 |
|---|---|---|
| committer | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2024-08-31 10:40:44 +0300 |
| commit | 1cb7b39901c2fb634994526d0ce541ee9274053f (patch) | |
| tree | 79756aa548d7d0dd65c596538dc6f99a6503d2e9 /drivers/media | |
| parent | a95ffde287835cc60df7dba2c15cfc07c6776e95 (diff) | |
| download | linux-1cb7b39901c2fb634994526d0ce541ee9274053f.tar.xz | |
media: i2c: og01a1b: Add management of optional reset GPIO
Omnivision OG01A1B camera sensor may have a connected active low GPIO
to XSHUTDOWN pad, and if so, include it into sensor power up sequence.
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/i2c/og01a1b.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/media/i2c/og01a1b.c b/drivers/media/i2c/og01a1b.c index ac719611b194..689e6a2db6ff 100644 --- a/drivers/media/i2c/og01a1b.c +++ b/drivers/media/i2c/og01a1b.c @@ -5,6 +5,7 @@ #include <linux/acpi.h> #include <linux/clk.h> #include <linux/delay.h> +#include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/pm_runtime.h> @@ -420,6 +421,7 @@ static const struct og01a1b_mode supported_modes[] = { struct og01a1b { struct clk *xvclk; + struct gpio_desc *reset_gpio; struct v4l2_subdev sd; struct media_pad pad; @@ -987,7 +989,11 @@ static int og01a1b_power_on(struct device *dev) if (ret) return ret; - if (og01a1b->xvclk) + gpiod_set_value_cansleep(og01a1b->reset_gpio, 0); + + if (og01a1b->reset_gpio) + usleep_range(5 * USEC_PER_MSEC, 6 * USEC_PER_MSEC); + else if (og01a1b->xvclk) usleep_range(delay, 2 * delay); return 0; @@ -1004,6 +1010,8 @@ static int og01a1b_power_off(struct device *dev) clk_disable_unprepare(og01a1b->xvclk); + gpiod_set_value_cansleep(og01a1b->reset_gpio, 1); + return 0; } @@ -1044,6 +1052,13 @@ static int og01a1b_probe(struct i2c_client *client) return ret; } + og01a1b->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(og01a1b->reset_gpio)) { + dev_err(&client->dev, "cannot get reset GPIO\n"); + return PTR_ERR(og01a1b->reset_gpio); + } + /* The sensor must be powered on to read the CHIP_ID register */ ret = og01a1b_power_on(&client->dev); if (ret) |