Hi Prabhakar, On 07/18/2013 05:54 PM, Lad, Prabhakar wrote: > From: "Lad, Prabhakar" <prabhakar.csengg@xxxxxxxxx> > > add OF support for the tvp7002 driver. > > Signed-off-by: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx> > --- > This patch depends on https://patchwork.kernel.org/patch/2828800/ > > Changes for v4: > 1: Improved descrition of end point properties. > > Changes for v3: > 1: Fixed review comments pointed by Sylwester. > > .../devicetree/bindings/media/i2c/tvp7002.txt | 53 ++++++++++++++++ > drivers/media/i2c/tvp7002.c | 67 ++++++++++++++++++-- > 2 files changed, 113 insertions(+), 7 deletions(-) > create mode 100644 Documentation/devicetree/bindings/media/i2c/tvp7002.txt > > diff --git a/Documentation/devicetree/bindings/media/i2c/tvp7002.txt b/Documentation/devicetree/bindings/media/i2c/tvp7002.txt > new file mode 100644 > index 0000000..1d00935 > --- /dev/null > +++ b/Documentation/devicetree/bindings/media/i2c/tvp7002.txt > @@ -0,0 +1,53 @@ > +* Texas Instruments TV7002 video decoder > + > +The TVP7002 device supports digitizing of video and graphics signal in RGB and > +YPbPr color space. > + > +Required Properties : > +- compatible : Must be "ti,tvp7002" > + > +Optional Properties: > +- hsync-active: HSYNC Polarity configuration for the bus. Default value when > + this property is not specified is <0>. > + > +- vsync-active: VSYNC Polarity configuration for the bus. Default value when > + this property is not specified is <0>. > + > +- pclk-sample: Clock polarity of the bus. Default value when this property is > + not specified is <0>. > + > +- sync-on-green-active: Active state of Sync-on-green signal property of the > + endpoint. > + 0 = Normal Operation (Default) I would extend this a little bit: 0 = Normal Operation (Active Low, Default) > + 1 = Inverted operation > + > +- field-even-active: Active-high Field ID output polarity control of the bus. > + Under normal operation, the field ID output is set to logic 1 for an odd field > + (field 1)and set to logic 0 for an even field (field 0). Add space before 'and'. > + 0 = Normal operation (default) > + 1 = FID output polarity inverted > + > +For further reading of port node refer Documentation/devicetree/bindings/media/ > +video-interfaces.txt. > + > +Example: > + > + i2c0@1c22000 { > + ... > + ... > + tvp7002@5c { > + compatible = "ti,tvp7002"; > + reg = <0x5c>; > + > + port { > + tvp7002_1: endpoint { > + hsync-active = <1>; > + vsync-active = <1>; > + pclk-sample = <0>; > + sync-on-green-active = <1>; > + field-even-active = <0>; > + }; > + }; > + }; > + ... > + }; > diff --git a/drivers/media/i2c/tvp7002.c b/drivers/media/i2c/tvp7002.c > index f6b1f3f..24a08fa 100644 > --- a/drivers/media/i2c/tvp7002.c > +++ b/drivers/media/i2c/tvp7002.c > @@ -35,6 +35,8 @@ > #include <media/v4l2-device.h> > #include <media/v4l2-common.h> > #include <media/v4l2-ctrls.h> > +#include <media/v4l2-of.h> > + > #include "tvp7002_reg.h" > > MODULE_DESCRIPTION("TI TVP7002 Video and Graphics Digitizer driver"); > @@ -943,6 +945,48 @@ static const struct v4l2_subdev_ops tvp7002_ops = { > .pad = &tvp7002_pad_ops, > }; > > +static struct tvp7002_config * > +tvp7002_get_pdata(struct i2c_client *client) > +{ > + struct v4l2_of_endpoint bus_cfg; > + struct tvp7002_config *pdata; > + struct device_node *endpoint; > + unsigned int flags; > + > + if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node) > + return client->dev.platform_data; > + > + endpoint = v4l2_of_get_next_endpoint(client->dev.of_node, NULL); > + if (!endpoint) > + return NULL; > + > + pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); > + if (!pdata) > + goto done; > + > + v4l2_of_parse_endpoint(endpoint, &bus_cfg); > + flags = bus_cfg.bus.parallel.flags; > + > + if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) > + pdata->hs_polarity = 1; > + > + if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) > + pdata->vs_polarity = 1; > + > + if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING) > + pdata->clk_polarity = 1; > + > + if (flags & V4L2_MBUS_FIELD_EVEN_HIGH) > + pdata->fid_polarity = 1; > + > + if (flags & V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH) > + pdata->sog_polarity = 1; > + > +done: > + of_node_put(endpoint); > + return pdata; > +} > + > /* > * tvp7002_probe - Probe a TVP7002 device > * @c: ptr to i2c_client struct > @@ -954,32 +998,32 @@ static const struct v4l2_subdev_ops tvp7002_ops = { > */ > static int tvp7002_probe(struct i2c_client *c, const struct i2c_device_id *id) > { > + struct tvp7002_config *pdata = tvp7002_get_pdata(c); > struct v4l2_subdev *sd; > struct tvp7002 *device; > struct v4l2_dv_timings timings; > int polarity_a; > int polarity_b; > u8 revision; > - > int error; > > + if (pdata == NULL) { > + dev_err(&c->dev, "No platform data\n"); > + return -EINVAL; > + } > + > /* Check if the adapter supports the needed features */ > if (!i2c_check_functionality(c->adapter, > I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) > return -EIO; > > - if (!c->dev.platform_data) { > - v4l_err(c, "No platform data!!\n"); > - return -ENODEV; > - } > - > device = devm_kzalloc(&c->dev, sizeof(struct tvp7002), GFP_KERNEL); > > if (!device) > return -ENOMEM; > > sd = &device->sd; > - device->pdata = c->dev.platform_data; > + device->pdata = pdata; > device->current_timings = tvp7002_timings; > > /* Tell v4l2 the device is ready */ > @@ -1084,9 +1128,18 @@ static const struct i2c_device_id tvp7002_id[] = { > }; > MODULE_DEVICE_TABLE(i2c, tvp7002_id); > > +#if IS_ENABLED(CONFIG_OF) > +static const struct of_device_id tvp7002_of_match[] = { > + { .compatible = "ti,tvp7002", }, > + { /* sentinel */ }, > +}; > +MODULE_DEVICE_TABLE(of, tvp7002_of_match); > +#endif > + > /* I2C driver data */ > static struct i2c_driver tvp7002_driver = { > .driver = { > + .of_match_table = of_match_ptr(tvp7002_of_match), > .owner = THIS_MODULE, > .name = TVP7002_MODULE_NAME, > }, > Regards, Hans -- 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
