MLK-19106: camera: add enable attribute to turn on/off color bar

Add analog_test_pattern device attribute for ov16035 in order
to turn on/off its color bar test pattern to debug

Signed-off-by: Guoniu.Zhou <guoniu.zhou@nxp.com>
Reviewed-by: Robby.Cai <robby.cai@nxp.com>

diff --git a/drivers/media/platform/imx8/max9286.c b/drivers/media/platform/imx8/max9286.c
index 64d79a0..8195947 100644 (file)
--- a/drivers/media/platform/imx8/max9286.c
+++ b/drivers/media/platform/imx8/max9286.c
@@ -2792,6 +2792,36 @@ static const struct media_entity_operations max9286_sd_media_ops = {
        .link_setup = max9286_link_setup,
 };
 
+ssize_t analog_show(struct device *dev,
+                       struct device_attribute *attr, char *buf)
+{
+       struct v4l2_subdev *sd = dev_get_drvdata(dev);
+       struct sensor_data *max9286_data = subdev_to_sensor_data(sd);
+       u8 val = 0;
+
+       ov10635_read_reg(max9286_data, 0, 0x370A, &val);
+       return sprintf(buf, "%s\n", (val & 0x4) ? "enabled" : "disabled");
+}
+
+static ssize_t analog_store(struct device *dev,
+                       struct device_attribute *attr, const char *buf, size_t count)
+{
+       struct v4l2_subdev *sd = dev_get_drvdata(dev);
+       struct sensor_data *max9286_data = subdev_to_sensor_data(sd);
+       char enabled[32];
+
+       if (sscanf(buf, "%s", enabled) > 0) {
+               if (strcmp(enabled, "enable") == 0)
+                       ov10635_write_reg(max9286_data, 0, 0x370A, 0x4);
+               else
+                       ov10635_write_reg(max9286_data, 0, 0x370A, 0x0);
+               return count;
+       }
+       return -EINVAL;
+}
+
+static DEVICE_ATTR(analog_test_pattern, 0644, analog_show, analog_store);
+
 /*!
  * max9286 I2C probe function
  *
@@ -2941,6 +2971,13 @@ static int max9286_probe(struct i2c_client *client,
        /* Disable CSI Output */
        max9286_write_reg(max9286_data, 0x15, 0x03);
 
+       /*Create device attr in sys */
+       retval = device_create_file(&client->dev, &dev_attr_analog_test_pattern);
+       if (retval < 0) {
+               dev_err(&client->dev, "%s: create device file fail\n", __func__);
+               return retval;
+       }
+
        dev_info(&max9286_data->i2c_client->dev,
                        "max9286_mipi is found, name %s\n", sd->name);
        return retval;
@@ -2958,6 +2995,7 @@ static int max9286_remove(struct i2c_client *client)
        struct sensor_data *max9286_data = subdev_to_sensor_data(sd);
 
        clk_disable_unprepare(max9286_data->sensor_clk);
+       device_remove_file(&client->dev, &dev_attr_analog_test_pattern);
        media_entity_cleanup(&sd->entity);
        v4l2_async_unregister_subdev(sd);