This is an automatic generated email to let you know that the following patch were queued at the http://git.linuxtv.org/cgit.cgi/media_tree.git tree: Subject: [media] media: ov2640: add primary dt support Author: Josh Wu <josh.wu@xxxxxxxxx> Date: Tue Feb 10 06:31:35 2015 -0300 Add device tree support for ov2640. In device tree, user needs to provide the master clock (xvclk). User can add the reset/pwdn pins if they have. Cc: devicetree@xxxxxxxxxxxxxxx Signed-off-by: Josh Wu <josh.wu@xxxxxxxxx> Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx> drivers/media/i2c/soc_camera/ov2640.c | 90 ++++++++++++++++++++++++++++++--- 1 files changed, 83 insertions(+), 7 deletions(-) --- http://git.linuxtv.org/cgit.cgi/media_tree.git/commit/?id=4e65172f7bd20fcbfa87453d1e5711ad129d4216 diff --git a/drivers/media/i2c/soc_camera/ov2640.c b/drivers/media/i2c/soc_camera/ov2640.c index 16adbcc..42d9ba3 100644 --- a/drivers/media/i2c/soc_camera/ov2640.c +++ b/drivers/media/i2c/soc_camera/ov2640.c @@ -18,6 +18,8 @@ #include <linux/i2c.h> #include <linux/slab.h> #include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/of_gpio.h> #include <linux/v4l2-mediabus.h> #include <linux/videodev2.h> @@ -283,6 +285,10 @@ struct ov2640_priv { u32 cfmt_code; struct v4l2_clk *clk; const struct ov2640_win_size *win; + + struct soc_camera_subdev_desc ssdd_dt; + struct gpio_desc *resetb_gpio; + struct gpio_desc *pwdn_gpio; }; /* @@ -1038,6 +1044,63 @@ static struct v4l2_subdev_ops ov2640_subdev_ops = { .video = &ov2640_subdev_video_ops, }; +/* OF probe functions */ +static int ov2640_hw_power(struct device *dev, int on) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ov2640_priv *priv = to_ov2640(client); + + dev_dbg(&client->dev, "%s: %s the camera\n", + __func__, on ? "ENABLE" : "DISABLE"); + + if (priv->pwdn_gpio) + gpiod_direction_output(priv->pwdn_gpio, !on); + + return 0; +} + +static int ov2640_hw_reset(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ov2640_priv *priv = to_ov2640(client); + + if (priv->resetb_gpio) { + /* Active the resetb pin to perform a reset pulse */ + gpiod_direction_output(priv->resetb_gpio, 1); + usleep_range(3000, 5000); + gpiod_direction_output(priv->resetb_gpio, 0); + } + + return 0; +} + +static int ov2640_probe_dt(struct i2c_client *client, + struct ov2640_priv *priv) +{ + /* Request the reset GPIO deasserted */ + priv->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb", + GPIOD_OUT_LOW); + if (!priv->resetb_gpio) + dev_dbg(&client->dev, "resetb gpio is not assigned!\n"); + else if (IS_ERR(priv->resetb_gpio)) + return PTR_ERR(priv->resetb_gpio); + + /* Request the power down GPIO asserted */ + priv->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn", + GPIOD_OUT_HIGH); + if (!priv->pwdn_gpio) + dev_dbg(&client->dev, "pwdn gpio is not assigned!\n"); + else if (IS_ERR(priv->pwdn_gpio)) + return PTR_ERR(priv->pwdn_gpio); + + /* Initialize the soc_camera_subdev_desc */ + priv->ssdd_dt.power = ov2640_hw_power; + priv->ssdd_dt.reset = ov2640_hw_reset; + client->dev.platform_data = &priv->ssdd_dt; + + return 0; +} + /* * i2c_driver functions */ @@ -1049,12 +1112,6 @@ static int ov2640_probe(struct i2c_client *client, struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); int ret; - if (!ssdd) { - dev_err(&adapter->dev, - "OV2640: Missing platform_data for driver\n"); - return -EINVAL; - } - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { dev_err(&adapter->dev, "OV2640: I2C-Adapter doesn't support SMBUS\n"); @@ -1068,10 +1125,22 @@ static int ov2640_probe(struct i2c_client *client, return -ENOMEM; } - priv->clk = v4l2_clk_get(&client->dev, "mclk"); + priv->clk = v4l2_clk_get(&client->dev, "xvclk"); if (IS_ERR(priv->clk)) return -EPROBE_DEFER; + if (!ssdd && !client->dev.of_node) { + dev_err(&client->dev, "Missing platform_data for driver\n"); + ret = -EINVAL; + goto err_clk; + } + + if (!ssdd) { + ret = ov2640_probe_dt(client, priv); + if (ret) + goto err_clk; + } + v4l2_i2c_subdev_init(&priv->subdev, client, &ov2640_subdev_ops); v4l2_ctrl_handler_init(&priv->hdl, 2); v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops, @@ -1120,9 +1189,16 @@ static const struct i2c_device_id ov2640_id[] = { }; MODULE_DEVICE_TABLE(i2c, ov2640_id); +static const struct of_device_id ov2640_of_match[] = { + {.compatible = "ovti,ov2640", }, + {}, +}; +MODULE_DEVICE_TABLE(of, ov2640_of_match); + static struct i2c_driver ov2640_i2c_driver = { .driver = { .name = "ov2640", + .of_match_table = of_match_ptr(ov2640_of_match), }, .probe = ov2640_probe, .remove = ov2640_remove, -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
