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[media] v4l: vsp1: Add DT support 

Implement support for the VSP1 DT bindings in the VSP1 driver. The
driver now first retrieves platform data either from the platform data
pointer or by reading the device tree node, and then validates it
regardless of the platform data source.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Laurent Pinchart 2014-04-08 13:40:13 -03:00 committed by Mauro Carvalho Chehab
parent 34d1cbdafd
commit 0b82fb95d9
1 changed files with 44 additions and 8 deletions
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52
drivers/media/platform/vsp1/vsp1_drv.c
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@ -16,6 +16,7 @@
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/videodev2.h>
@ -431,34 +432,59 @@ static const struct dev_pm_ops vsp1_pm_ops = {
* Platform Driver
*/
static struct vsp1_platform_data *
vsp1_get_platform_data(struct platform_device *pdev)
static int vsp1_validate_platform_data(struct platform_device *pdev,
struct vsp1_platform_data *pdata)
{
struct vsp1_platform_data *pdata = pdev->dev.platform_data;
if (pdata == NULL) {
dev_err(&pdev->dev, "missing platform data\n");
return NULL;
return -EINVAL;
}
if (pdata->rpf_count <= 0 || pdata->rpf_count > VPS1_MAX_RPF) {
dev_err(&pdev->dev, "invalid number of RPF (%u)\n",
pdata->rpf_count);
return NULL;
return -EINVAL;
}
if (pdata->uds_count <= 0 || pdata->uds_count > VPS1_MAX_UDS) {
dev_err(&pdev->dev, "invalid number of UDS (%u)\n",
pdata->uds_count);
return NULL;
return -EINVAL;
}
if (pdata->wpf_count <= 0 || pdata->wpf_count > VPS1_MAX_WPF) {
dev_err(&pdev->dev, "invalid number of WPF (%u)\n",
pdata->wpf_count);
return NULL;
return -EINVAL;
}
return 0;
}
static struct vsp1_platform_data *
vsp1_get_platform_data(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct vsp1_platform_data *pdata;
if (!IS_ENABLED(CONFIG_OF) || np == NULL)
return pdev->dev.platform_data;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (pdata == NULL)
return NULL;
if (of_property_read_bool(np, "renesas,has-lif"))
pdata->features |= VSP1_HAS_LIF;
if (of_property_read_bool(np, "renesas,has-lut"))
pdata->features |= VSP1_HAS_LUT;
if (of_property_read_bool(np, "renesas,has-sru"))
pdata->features |= VSP1_HAS_SRU;
of_property_read_u32(np, "renesas,#rpf", &pdata->rpf_count);
of_property_read_u32(np, "renesas,#uds", &pdata->uds_count);
of_property_read_u32(np, "renesas,#wpf", &pdata->wpf_count);
return pdata;
}
@ -481,6 +507,10 @@ static int vsp1_probe(struct platform_device *pdev)
if (vsp1->pdata == NULL)
return -ENODEV;
ret = vsp1_validate_platform_data(pdev, vsp1->pdata);
if (ret < 0)
return ret;
/* I/O, IRQ and clock resources */
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
vsp1->mmio = devm_ioremap_resource(&pdev->dev, io);
@ -527,6 +557,11 @@ static int vsp1_remove(struct platform_device *pdev)
return 0;
}
static const struct of_device_id vsp1_of_match[] = {
{ .compatible = "renesas,vsp1" },
{ },
};
static struct platform_driver vsp1_platform_driver = {
.probe = vsp1_probe,
.remove = vsp1_remove,
@ -534,6 +569,7 @@ static struct platform_driver vsp1_platform_driver = {
.owner = THIS_MODULE,
.name = "vsp1",
.pm = &vsp1_pm_ops,
.of_match_table = vsp1_of_match,
},
};