Hi,
One more point for your devicetree conversions,
On Mon, Apr 29, 2013 at 01:30:01PM +0530, Prabhakar Lad wrote:
> From: Lad, Prabhakar <prabhakar.cse...@gmail.com>
>
> add OF support for the mt9p031 sensor driver.
>
> +static struct mt9p031_platform_data
> + *mt9p031_get_pdata(struct i2c_client *client)
> +
> +{
> + if (!client->dev.platform_data && client->dev.of_node) {
> + struct device_node *np;
> + struct mt9p031_platform_data *pdata;
> + int ret;
> +
> + 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) {
> + pr_warn("mt9p031 failed allocate memeory\n");
> + return NULL;
> + }
> + ret = of_property_read_u32(np, "reset", &pdata->reset);
> + if (ret == -EINVAL)
> + pdata->reset = -1;
> + else if (ret == -ENODATA)
> + return NULL;
> +
> + if (of_property_read_u32(np, "ext_freq", &pdata->ext_freq))
> + return NULL;
> +
> + if (of_property_read_u32(np, "target_freq",
> + &pdata->target_freq))
> + return NULL;
> +
> + return pdata;
> + }
I don't know how the others see this, but IMO it would be cleaner to
first add a duplicate of the members of pdata in struct mt9p031 and then
initialize them either from pdata or from devicetree data. The
(artificial) creation of platform_data for the devicetree case adds a
new level of indirection. This may not be a problem here, but there are
cases where there is no 1:1 transcription between pdata and devicetree
possible.
Sascha
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