提交 47c71bd6 编写于 作者: B Ben Dooks 提交者: Mauro Carvalho Chehab

[media] rcar_vin: add devicetree support

Add support for devicetree probe for the rcar-vin
driver.
Signed-off-by: NBen Dooks <ben.dooks@codethink.co.uk>
[g.liakhovetski@gmx.de fix a typo, sort headers alphabetically]
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>
上级 e9a1d94f
Renesas RCar Video Input driver (rcar_vin)
------------------------------------------
The rcar_vin device provides video input capabilities for the Renesas R-Car
family of devices. The current blocks are always slaves and suppot one input
channel which can be either RGB, YUYV or BT656.
- compatible: Must be one of the following
- "renesas,vin-r8a7791" for the R8A7791 device
- "renesas,vin-r8a7790" for the R8A7790 device
- "renesas,vin-r8a7779" for the R8A7779 device
- "renesas,vin-r8a7778" for the R8A7778 device
- reg: the register base and size for the device registers
- interrupts: the interrupt for the device
- clocks: Reference to the parent clock
Additionally, an alias named vinX will need to be created to specify
which video input device this is.
The per-board settings:
- port sub-node describing a single endpoint connected to the vin
as described in video-interfaces.txt[1]. Only the first one will
be considered as each vin interface has one input port.
These settings are used to work out video input format and widths
into the system.
Device node example
-------------------
aliases {
vin0 = &vin0;
};
vin0: vin@0xe6ef0000 {
compatible = "renesas,vin-r8a7790";
clocks = <&mstp8_clks R8A7790_CLK_VIN0>;
reg = <0 0xe6ef0000 0 0x1000>;
interrupts = <0 188 IRQ_TYPE_LEVEL_HIGH>;
status = "disabled";
};
Board setup example (vin1 composite video input)
------------------------------------------------
&i2c2 {
status = "ok";
pinctrl-0 = <&i2c2_pins>;
pinctrl-names = "default";
adv7180@20 {
compatible = "adi,adv7180";
reg = <0x20>;
remote = <&vin1>;
port {
adv7180: endpoint {
bus-width = <8>;
remote-endpoint = <&vin1ep0>;
};
};
};
};
/* composite video input */
&vin1 {
pinctrl-0 = <&vin1_pins>;
pinctrl-names = "default";
status = "ok";
port {
#address-cells = <1>;
#size-cells = <0>;
vin1ep0: endpoint {
remote-endpoint = <&adv7180>;
bus-width = <8>;
};
};
};
[1] video-interfaces.txt common video media interface
......@@ -19,6 +19,8 @@
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_data/camera-rcar.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
......@@ -31,6 +33,7 @@
#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-mediabus.h>
#include <media/v4l2-of.h>
#include <media/v4l2-subdev.h>
#include <media/videobuf2-dma-contig.h>
......@@ -1390,6 +1393,17 @@ static struct soc_camera_host_ops rcar_vin_host_ops = {
.init_videobuf2 = rcar_vin_init_videobuf2,
};
#ifdef CONFIG_OF
static struct of_device_id rcar_vin_of_table[] = {
{ .compatible = "renesas,vin-r8a7791", .data = (void *)RCAR_GEN2 },
{ .compatible = "renesas,vin-r8a7790", .data = (void *)RCAR_GEN2 },
{ .compatible = "renesas,vin-r8a7779", .data = (void *)RCAR_H1 },
{ .compatible = "renesas,vin-r8a7778", .data = (void *)RCAR_M1 },
{ },
};
MODULE_DEVICE_TABLE(of, rcar_vin_of_table);
#endif
static struct platform_device_id rcar_vin_id_table[] = {
{ "r8a7791-vin", RCAR_GEN2 },
{ "r8a7790-vin", RCAR_GEN2 },
......@@ -1402,15 +1416,52 @@ MODULE_DEVICE_TABLE(platform, rcar_vin_id_table);
static int rcar_vin_probe(struct platform_device *pdev)
{
const struct of_device_id *match = NULL;
struct rcar_vin_priv *priv;
struct resource *mem;
struct rcar_vin_platform_data *pdata;
unsigned int pdata_flags;
int irq, ret;
pdata = pdev->dev.platform_data;
if (!pdata || !pdata->flags) {
dev_err(&pdev->dev, "platform data not set\n");
return -EINVAL;
if (pdev->dev.of_node) {
struct v4l2_of_endpoint ep;
struct device_node *np;
match = of_match_device(of_match_ptr(rcar_vin_of_table),
&pdev->dev);
np = of_graph_get_next_endpoint(pdev->dev.of_node, NULL);
if (!np) {
dev_err(&pdev->dev, "could not find endpoint\n");
return -EINVAL;
}
ret = v4l2_of_parse_endpoint(np, &ep);
if (ret) {
dev_err(&pdev->dev, "could not parse endpoint\n");
return ret;
}
if (ep.bus_type == V4L2_MBUS_BT656)
pdata_flags = RCAR_VIN_BT656;
else {
pdata_flags = 0;
if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
pdata_flags |= RCAR_VIN_HSYNC_ACTIVE_LOW;
if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
pdata_flags |= RCAR_VIN_VSYNC_ACTIVE_LOW;
}
of_node_put(np);
dev_dbg(&pdev->dev, "pdata_flags = %08x\n", pdata_flags);
} else {
pdata = pdev->dev.platform_data;
if (!pdata || !pdata->flags) {
dev_err(&pdev->dev, "platform data not set\n");
return -EINVAL;
}
pdata_flags = pdata->flags;
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
......@@ -1441,12 +1492,18 @@ static int rcar_vin_probe(struct platform_device *pdev)
priv->ici.priv = priv;
priv->ici.v4l2_dev.dev = &pdev->dev;
priv->ici.nr = pdev->id;
priv->ici.drv_name = dev_name(&pdev->dev);
priv->ici.ops = &rcar_vin_host_ops;
priv->pdata_flags = pdata->flags;
priv->chip = pdev->id_entry->driver_data;
priv->pdata_flags = pdata_flags;
if (!match) {
priv->ici.nr = pdev->id;
priv->chip = pdev->id_entry->driver_data;
} else {
priv->ici.nr = of_alias_get_id(pdev->dev.of_node, "vin");
priv->chip = (enum chip_id)match->data;
};
spin_lock_init(&priv->lock);
INIT_LIST_HEAD(&priv->capture);
......@@ -1487,6 +1544,7 @@ static struct platform_driver rcar_vin_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(rcar_vin_of_table),
},
.id_table = rcar_vin_id_table,
};
......
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