Hi Sylwester,
On Mon, Mar 09, 2015 at 11:35:52AM +0100, Sylwester Nawrocki wrote:
> Hi Laurent,
>
> On 08/03/15 14:45, Laurent Pinchart wrote:
> > +++ b/Documentation/devicetree/bindings/media/i2c/mt9v032.txt
> > @@ -0,0 +1,41 @@
> > +* Aptina 1/3-Inch WVGA CMOS Digital Image Sensor
> > +
> > +The Aptina MT9V032 is a 1/3-inch CMOS active pixel digital image sensor with
> > +an active array size of 752H x 480V. It is programmable through a simple
> > +two-wire serial interface.
> > +
> > +Required Properties:
> > +
> > +- compatible: value should be either one among the following
> > + (a) "aptina,mt9v032" for MT9V032 color sensor
> > + (b) "aptina,mt9v032m" for MT9V032 monochrome sensor
> > + (c) "aptina,mt9v034" for MT9V034 color sensor
> > + (d) "aptina,mt9v034m" for MT9V034 monochrome sensor
>
> It can't be determined at runtime whether the sensor is just monochromatic ?
> Al in all the color filter array is a physical property of the sensor, still
> the driver seems to be ignoring the "m" suffix. Hence I suspect the register
> interfaces for both color and monochromatic versions are compatible.
> I'm wondering whether using a boolean property to indicate the color filter
> array type would do as well.
>
> > +static struct mt9v032_platform_data *
> > +mt9v032_get_pdata(struct i2c_client *client)
> > +{
> > + struct mt9v032_platform_data *pdata;
> > + struct v4l2_of_endpoint endpoint;
> > + struct device_node *np;
> > + struct property *prop;
> > +
> > + 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;
> > +
> > + if (v4l2_of_parse_endpoint(np, &endpoint) < 0)
> > + goto done;
> > +
> > + pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
> > + if (!pdata)
> > + goto done;
> > +
> > + prop = of_find_property(np, "link-freqs", NULL);
>
> I suspect you meant "link-frequencies" here ?
Yes. I wonder if it'd make sense to add this to struct v4l2_of_endpoint. I
can write a patch for that.
> > + if (prop) {
> > + size_t size = prop->length / 8;
> > + u64 *link_freqs;
> > +
> > + link_freqs = devm_kzalloc(&client->dev,
> > + size * sizeof(*link_freqs),
> > + GFP_KERNEL);
> > + if (!link_freqs)
> > + goto done;
> > +
> > + if (of_property_read_u64_array(np, "link-frequencies",
> > + link_freqs, size) < 0)
> > + goto done;
> > +
> > + pdata->link_freqs = link_freqs;
> > + pdata->link_def_freq = link_freqs[0];
> > + }
If you're interested in just a single value, you can use
of_property_read_u64().
> > + pdata->clk_pol = !!(endpoint.bus.parallel.flags &
> > + V4L2_MBUS_PCLK_SAMPLE_RISING);
> > +
> > +done:
> > + of_node_put(np);
> > + return pdata;
> > +}
>
> > @@ -1034,9 +1086,21 @@ static const struct i2c_device_id mt9v032_id[] = {
> > };
> > MODULE_DEVICE_TABLE(i2c, mt9v032_id);
> >
> > +#if IS_ENABLED(CONFIG_OF)
> > +static const struct of_device_id mt9v032_of_match[] = {
> > + { .compatible = "mt9v032" },
> > + { .compatible = "mt9v032m" },
> > + { .compatible = "mt9v034" },
> > + { .compatible = "mt9v034m" },
> > + { /* Sentinel */ }
> > +};
> > +MODULE_DEVICE_TABLE(of, mt9v032_of_match);
> > +#endif
--
Kind regards,
Sakari Ailus
e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx
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