On Sun, May 26, 2013 at 06:38:54PM +0530, Prabhakar Lad wrote: > From: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx> > > add OF support for the mt9p031 sensor driver. > Alongside this patch sorts the header inclusion alphabetically. > > Signed-off-by: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx> > Cc: Hans Verkuil <hans.verkuil@xxxxxxxxx> > Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> > Cc: Guennadi Liakhovetski <g.liakhovetski@xxxxxx> > Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> > Cc: Sakari Ailus <sakari.ailus@xxxxxx> > Cc: Grant Likely <grant.likely@xxxxxxxxxxxx> > Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> > Cc: Rob Herring <rob.herring@xxxxxxxxxxx> > Cc: Rob Landley <rob@xxxxxxxxxxx> > Cc: Arnd Bergmann <arnd@xxxxxxxx> > Cc: devicetree-discuss@xxxxxxxxxxxxxxxx > Cc: davinci-linux-open-source@xxxxxxxxxxxxxxxxxxxx > Cc: linux-doc@xxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx Reviewed-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> Sascha > --- > Changes for NON RFC v1: > 1: added missing call for of_node_put(). > > Changes for RFC v4 (https://patchwork.kernel.org/patch/2556251/): > 1: Renamed "gpio-reset" property to "reset-gpios". > 2: Dropped assigning the driver data from the of node. > > Changes for RFC v3(https://patchwork.kernel.org/patch/2515921/): > 1: Dropped check if gpio-reset is valid. > 2: Fixed some code nits. > 3: Included a reference to the V4L2 DT bindings documentation. > > Changes for RFC v2 (https://patchwork.kernel.org/patch/2510201/): > 1: Used '-' instead of '_' for device properties. > 2: Specified gpio reset pin as phandle in device node. > 3: Handle platform data properly even if kernel is compiled with > devicetree support. > 4: Used dev_* for messages in drivers instead of pr_*. > 5: Changed compatible property to "aptina,mt9p031" and "aptina,mt9p031m". > 6: Sorted the header inclusion alphabetically and fixed some minor code nits. > > RFC v1: https://patchwork.kernel.org/patch/2498791/ > > .../devicetree/bindings/media/i2c/mt9p031.txt | 40 ++++++++++++++++++ > drivers/media/i2c/mt9p031.c | 43 +++++++++++++++++++- > 2 files changed, 81 insertions(+), 2 deletions(-) > create mode 100644 Documentation/devicetree/bindings/media/i2c/mt9p031.txt > > diff --git a/Documentation/devicetree/bindings/media/i2c/mt9p031.txt b/Documentation/devicetree/bindings/media/i2c/mt9p031.txt > new file mode 100644 > index 0000000..59d613c > --- /dev/null > +++ b/Documentation/devicetree/bindings/media/i2c/mt9p031.txt > @@ -0,0 +1,40 @@ > +* Aptina 1/2.5-Inch 5Mp CMOS Digital Image Sensor > + > +The Aptina MT9P031 is a 1/2.5-inch CMOS active pixel digital image sensor with > +an active array size of 2592H x 1944V. It is programmable through a simple > +two-wire serial interface. > + > +Required Properties : > +- compatible : value should be either one among the following > + (a) "aptina,mt9p031" for mt9p031 sensor > + (b) "aptina,mt9p031m" for mt9p031m sensor > + > +- input-clock-frequency : Input clock frequency. > + > +- pixel-clock-frequency : Pixel clock frequency. > + > +Optional Properties : > +- reset-gpios: Chip reset GPIO > + > +For further reading of port node refer Documentation/devicetree/bindings/media/ > +video-interfaces.txt. > + > +Example: > + > + i2c0@1c22000 { > + ... > + ... > + mt9p031@5d { > + compatible = "aptina,mt9p031"; > + reg = <0x5d>; > + reset-gpios = <&gpio3 30 0>; > + > + port { > + mt9p031_1: endpoint { > + input-clock-frequency = <6000000>; > + pixel-clock-frequency = <96000000>; > + }; > + }; > + }; > + ... > + }; > diff --git a/drivers/media/i2c/mt9p031.c b/drivers/media/i2c/mt9p031.c > index bf49899..bb1f993 100644 > --- a/drivers/media/i2c/mt9p031.c > +++ b/drivers/media/i2c/mt9p031.c > @@ -16,9 +16,10 @@ > #include <linux/delay.h> > #include <linux/device.h> > #include <linux/gpio.h> > -#include <linux/module.h> > #include <linux/i2c.h> > #include <linux/log2.h> > +#include <linux/module.h> > +#include <linux/of_gpio.h> > #include <linux/pm.h> > #include <linux/regulator/consumer.h> > #include <linux/slab.h> > @@ -28,6 +29,7 @@ > #include <media/v4l2-chip-ident.h> > #include <media/v4l2-ctrls.h> > #include <media/v4l2-device.h> > +#include <media/v4l2-of.h> > #include <media/v4l2-subdev.h> > > #include "aptina-pll.h" > @@ -928,10 +930,37 @@ static const struct v4l2_subdev_internal_ops mt9p031_subdev_internal_ops = { > * Driver initialization and probing > */ > > +static struct mt9p031_platform_data * > +mt9p031_get_pdata(struct i2c_client *client) > +{ > + struct mt9p031_platform_data *pdata = NULL; > + struct device_node *np; > + > + if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node) > + return client->dev.platform_data; > + > + np = v4l2_of_get_next_endpoint(client->dev.of_node, NULL); > + if (!np) > + return NULL; > + > + pdata = devm_kzalloc(&client->dev, sizeof(struct mt9p031_platform_data), > + GFP_KERNEL); > + if (!pdata) > + goto done; > + > + pdata->reset = of_get_named_gpio(client->dev.of_node, "reset-gpios", 0); > + of_property_read_u32(np, "input-clock-frequency", &pdata->ext_freq); > + of_property_read_u32(np, "pixel-clock-frequency", &pdata->target_freq); > + > +done: > + of_node_put(np); > + return pdata; > +} > + > static int mt9p031_probe(struct i2c_client *client, > const struct i2c_device_id *did) > { > - struct mt9p031_platform_data *pdata = client->dev.platform_data; > + struct mt9p031_platform_data *pdata = mt9p031_get_pdata(client); > struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); > struct mt9p031 *mt9p031; > unsigned int i; > @@ -1070,8 +1099,18 @@ static const struct i2c_device_id mt9p031_id[] = { > }; > MODULE_DEVICE_TABLE(i2c, mt9p031_id); > > +#if IS_ENABLED(CONFIG_OF) > +static const struct of_device_id mt9p031_of_match[] = { > + { .compatible = "aptina,mt9p031", }, > + { .compatible = "aptina,mt9p031m", }, > + { /* sentinel */ }, > +}; > +MODULE_DEVICE_TABLE(of, mt9p031_of_match); > +#endif > + > static struct i2c_driver mt9p031_i2c_driver = { > .driver = { > + .of_match_table = of_match_ptr(mt9p031_of_match), > .name = "mt9p031", > }, > .probe = mt9p031_probe, > -- > 1.7.0.4 > > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
