@@ -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;
@@ -981,6 +983,9 @@ static int og01a1b_power_on(struct device *dev)
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct og01a1b *og01a1b = to_og01a1b(sd);
+ gpiod_set_value_cansleep(og01a1b->reset_gpio, 0);
+ usleep_range(USEC_PER_MSEC, 2 * USEC_PER_MSEC);
+
return clk_prepare_enable(og01a1b->xvclk);
}
@@ -991,6 +996,8 @@ static int og01a1b_power_off(struct device *dev)
clk_disable_unprepare(og01a1b->xvclk);
+ gpiod_set_value_cansleep(og01a1b->reset_gpio, 1);
+
return 0;
}
@@ -1031,6 +1038,13 @@ 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)
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> --- drivers/media/i2c/og01a1b.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)