@@ -19,6 +19,7 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_graph.h>
+#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <media/v4l2-ctrls.h>
@@ -881,86 +882,75 @@ static int ov5647_stream_off(struct v4l2_subdev *sd)
return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x01);
}
-static int set_sw_standby(struct v4l2_subdev *sd, bool standby)
+static int ov5647_power_on(struct device *dev)
{
+ struct ov5647 *sensor = dev_get_drvdata(dev);
int ret;
- u8 rdval;
- ret = ov5647_read(sd, OV5647_SW_STANDBY, &rdval);
- if (ret < 0)
- return ret;
+ dev_dbg(dev, "OV5647 power on\n");
- if (standby)
- rdval &= ~0x01;
- else
- rdval |= 0x01;
-
- return ov5647_write(sd, OV5647_SW_STANDBY, rdval);
-}
+ if (sensor->pwdn) {
+ gpiod_set_value_cansleep(sensor->pwdn, 0);
+ msleep(PWDN_ACTIVE_DELAY_MS);
+ }
-static int ov5647_sensor_power(struct v4l2_subdev *sd, int on)
-{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct ov5647 *sensor = to_sensor(sd);
- int ret = 0;
+ ret = clk_prepare_enable(sensor->xclk);
+ if (ret < 0) {
+ dev_err(dev, "clk prepare enable failed\n");
+ goto error_pwdn;
+ }
- mutex_lock(&sensor->lock);
+ ret = ov5647_write_array(&sensor->sd, sensor_oe_enable_regs,
+ ARRAY_SIZE(sensor_oe_enable_regs));
+ if (ret < 0) {
+ dev_err(dev, "write sensor_oe_enable_regs error\n");
+ goto error_clk_disable;
+ }
- if (on && !sensor->power_count) {
- dev_dbg(&client->dev, "OV5647 power on\n");
+ /* Stream off to coax lanes into LP-11 state. */
+ ret = ov5647_stream_off(&sensor->sd);
+ if (ret < 0) {
+ dev_err(dev, "camera not available, check power\n");
+ goto error_clk_disable;
+ }
- if (sensor->pwdn) {
- gpiod_set_value_cansleep(sensor->pwdn, 0);
- msleep(PWDN_ACTIVE_DELAY_MS);
- }
+ return 0;
- ret = clk_prepare_enable(sensor->xclk);
- if (ret < 0) {
- dev_err(&client->dev, "clk prepare enable failed\n");
- goto out;
- }
+error_clk_disable:
+ clk_disable_unprepare(sensor->xclk);
+error_pwdn:
+ gpiod_set_value_cansleep(sensor->pwdn, 1);
- ret = ov5647_write_array(sd, sensor_oe_enable_regs,
- ARRAY_SIZE(sensor_oe_enable_regs));
- if (ret < 0) {
- clk_disable_unprepare(sensor->xclk);
- dev_err(&client->dev,
- "write sensor_oe_enable_regs error\n");
- goto out;
- }
+ return ret;
+}
- /* Stream off to coax lanes into LP-11 state. */
- ret = ov5647_stream_off(sd);
- if (ret < 0) {
- clk_disable_unprepare(sensor->xclk);
- dev_err(&client->dev,
- "Camera not available, check Power\n");
- goto out;
- }
- } else if (!on && sensor->power_count == 1) {
- dev_dbg(&client->dev, "OV5647 power off\n");
+static int ov5647_power_off(struct device *dev)
+{
+ struct ov5647 *sensor = dev_get_drvdata(dev);
+ u8 rdval;
+ int ret;
- ret = ov5647_write_array(sd, sensor_oe_disable_regs,
- ARRAY_SIZE(sensor_oe_disable_regs));
- if (ret < 0)
- dev_dbg(&client->dev, "disable oe failed\n");
+ dev_dbg(dev, "OV5647 power off\n");
- ret = set_sw_standby(sd, true);
- if (ret < 0)
- dev_dbg(&client->dev, "soft stby failed\n");
+ ret = ov5647_write_array(&sensor->sd, sensor_oe_disable_regs,
+ ARRAY_SIZE(sensor_oe_disable_regs));
+ if (ret < 0)
+ dev_dbg(dev, "disable oe failed\n");
- clk_disable_unprepare(sensor->xclk);
- gpiod_set_value_cansleep(sensor->pwdn, 1);
- }
+ /* Enter software standby */
+ ret = ov5647_read(&sensor->sd, OV5647_SW_STANDBY, &rdval);
+ if (ret < 0)
+ dev_dbg(dev, "software standby failed\n");
- /* Update the power count. */
- sensor->power_count += on ? 1 : -1;
- WARN_ON(sensor->power_count < 0);
+ rdval &= ~0x01;
+ ret = ov5647_write(&sensor->sd, OV5647_SW_STANDBY, rdval);
+ if (ret < 0)
+ dev_dbg(dev, "software standby failed\n");
-out:
- mutex_unlock(&sensor->lock);
+ clk_disable_unprepare(sensor->xclk);
+ gpiod_set_value_cansleep(sensor->pwdn, 1);
- return ret;
+ return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
@@ -989,7 +979,6 @@ static int ov5647_sensor_set_register(struct v4l2_subdev *sd,
/* Subdev core operations registration */
static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = {
- .s_power = ov5647_sensor_power,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ov5647_sensor_get_register,
.s_register = ov5647_sensor_set_register,
@@ -1543,24 +1532,29 @@ static int ov5647_probe(struct i2c_client *client)
if (ret < 0)
goto ctrl_handler_free;
- if (sensor->pwdn) {
- gpiod_set_value_cansleep(sensor->pwdn, 0);
- msleep(PWDN_ACTIVE_DELAY_MS);
- }
+ ret = ov5647_power_on(dev);
+ if (ret)
+ goto entity_cleanup;
ret = ov5647_detect(sd);
- gpiod_set_value_cansleep(sensor->pwdn, 1);
if (ret < 0)
- goto entity_cleanup;
+ goto power_off;
ret = v4l2_async_register_subdev(sd);
if (ret < 0)
- goto entity_cleanup;
+ goto power_off;
+
+ /* Enable runtime PM and turn off the device */
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_idle(dev);
dev_dbg(dev, "OmniVision OV5647 camera driver probed\n");
return 0;
+power_off:
+ ov5647_power_off(dev);
entity_cleanup:
media_entity_cleanup(&sd->entity);
ctrl_handler_free:
@@ -1580,11 +1574,16 @@ static int ov5647_remove(struct i2c_client *client)
media_entity_cleanup(&sensor->sd.entity);
v4l2_ctrl_handler_free(&sensor->ctrls);
v4l2_device_unregister_subdev(sd);
+ pm_runtime_disable(&client->dev);
mutex_destroy(&sensor->lock);
return 0;
}
+static const struct dev_pm_ops ov5647_pm_ops = {
+ SET_RUNTIME_PM_OPS(ov5647_power_off, ov5647_power_on, NULL)
+};
+
static const struct i2c_device_id ov5647_id[] = {
{ "ov5647", 0 },
{ /* sentinel */ }
@@ -1603,6 +1602,7 @@ static struct i2c_driver ov5647_driver = {
.driver = {
.of_match_table = of_match_ptr(ov5647_of_match),
.name = "ov5647",
+ .pm = &ov5647_pm_ops,
},
.probe_new = ov5647_probe,
.remove = ov5647_remove,
Use the pm_runtime framework to replace the legacy s_power() operation. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> --- drivers/media/i2c/ov5647.c | 142 ++++++++++++++++++------------------- 1 file changed, 71 insertions(+), 71 deletions(-)