| Message ID | 1418283339-16281-4-git-send-email-josh.wu@atmel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Josh, Thank you for the patch. I only have three minor comments. After fixing them, Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> On Thursday 11 December 2014 15:35:37 Josh Wu wrote: > Add device tree support for ov2640. > > Cc: devicetree@vger.kernel.org > Signed-off-by: Josh Wu <josh.wu@atmel.com> > --- > v2 -> v3: > 1. fix gpiod usage. > 2. refine the ov2640_probe() function. > > v1 -> v2: > 1. use gpiod APIs. > 2. change the gpio pin's name according to datasheet. > 3. reduce the delay for .reset() function. > > drivers/media/i2c/soc_camera/ov2640.c | 87 +++++++++++++++++++++++++++++--- > 1 file changed, 81 insertions(+), 6 deletions(-) > > diff --git a/drivers/media/i2c/soc_camera/ov2640.c > b/drivers/media/i2c/soc_camera/ov2640.c index 9ee910d..e0bcf5b 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; > }; > > /* > @@ -1047,6 +1053,63 @@ 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) > +{ > + /* reset is not actived */ Do you mean that you configure the reset signal as inactive ? I would state that as "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); > + > + /* Power down actived */ And "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 > */ > @@ -1058,12 +1121,6 @@ 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"); > @@ -1077,6 +1134,17 @@ static int ov2640_probe(struct i2c_client *client, > return -ENOMEM; > } > > + if (!ssdd && !client->dev.of_node) { > + dev_err(&client->dev, "Missing platform_data for driver\n"); > + return -EINVAL; > + } > + > + if (!ssdd && client->dev.of_node) { You can just test for !ssdd as you've tested client->dev.of_node above already. > + ret = ov2640_probe_dt(client, priv); > + if (ret) > + return ret; > + } > + > 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, > @@ -1123,9 +1191,16 @@ 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,
Hi, Laurent On 12/11/2014 4:10 PM, Laurent Pinchart wrote: > Hi Josh, > > Thank you for the patch. > > I only have three minor comments. After fixing them, > > Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Thanks for the review. > > On Thursday 11 December 2014 15:35:37 Josh Wu wrote: >> Add device tree support for ov2640. >> >> Cc: devicetree@vger.kernel.org >> Signed-off-by: Josh Wu <josh.wu@atmel.com> >> --- >> v2 -> v3: >> 1. fix gpiod usage. >> 2. refine the ov2640_probe() function. >> >> v1 -> v2: >> 1. use gpiod APIs. >> 2. change the gpio pin's name according to datasheet. >> 3. reduce the delay for .reset() function. >> >> drivers/media/i2c/soc_camera/ov2640.c | 87 +++++++++++++++++++++++++++++--- >> 1 file changed, 81 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/media/i2c/soc_camera/ov2640.c >> b/drivers/media/i2c/soc_camera/ov2640.c index 9ee910d..e0bcf5b 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; >> }; >> >> /* >> @@ -1047,6 +1053,63 @@ 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) >> +{ >> + /* reset is not actived */ > Do you mean that you configure the reset signal as inactive ? I would state > that as "Request the reset GPIO deasserted". yes, exactly. I'll take your sentence. thanks. > >> + 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); >> + >> + /* Power down actived */ > And "Request the power down GPIO asserted". ditto. > >> + 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 >> */ >> @@ -1058,12 +1121,6 @@ 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"); >> @@ -1077,6 +1134,17 @@ static int ov2640_probe(struct i2c_client *client, >> return -ENOMEM; >> } >> >> + if (!ssdd && !client->dev.of_node) { >> + dev_err(&client->dev, "Missing platform_data for driver\n"); >> + return -EINVAL; >> + } >> + >> + if (!ssdd && client->dev.of_node) { > You can just test for !ssdd as you've tested client->dev.of_node above > already. Right, thanks. Best Regards, Josh Wu > >> + ret = ov2640_probe_dt(client, priv); >> + if (ret) >> + return ret; >> + } >> + >> 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, >> @@ -1123,9 +1191,16 @@ 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,
diff --git a/drivers/media/i2c/soc_camera/ov2640.c b/drivers/media/i2c/soc_camera/ov2640.c index 9ee910d..e0bcf5b 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; }; /* @@ -1047,6 +1053,63 @@ 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) +{ + /* reset is not actived */ + 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); + + /* Power down actived */ + 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 */ @@ -1058,12 +1121,6 @@ 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"); @@ -1077,6 +1134,17 @@ static int ov2640_probe(struct i2c_client *client, return -ENOMEM; } + if (!ssdd && !client->dev.of_node) { + dev_err(&client->dev, "Missing platform_data for driver\n"); + return -EINVAL; + } + + if (!ssdd && client->dev.of_node) { + ret = ov2640_probe_dt(client, priv); + if (ret) + return ret; + } + 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, @@ -1123,9 +1191,16 @@ 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,
Add device tree support for ov2640. Cc: devicetree@vger.kernel.org Signed-off-by: Josh Wu <josh.wu@atmel.com> --- v2 -> v3: 1. fix gpiod usage. 2. refine the ov2640_probe() function. v1 -> v2: 1. use gpiod APIs. 2. change the gpio pin's name according to datasheet. 3. reduce the delay for .reset() function. drivers/media/i2c/soc_camera/ov2640.c | 87 ++++++++++++++++++++++++++++++++--- 1 file changed, 81 insertions(+), 6 deletions(-)