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authorBen Dooks <ben.dooks@codethink.co.uk>2014-07-05 22:26:22 (GMT)
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-07-30 22:34:45 (GMT)
commit47c71bd61b772cd72159dff4aae43734257a485a (patch)
tree9511f78c0482c90e76b5105edd300cabf9319cb2
parente9a1d94fa85542d4f3046ac82d234a3c8349c948 (diff)
[media] rcar_vin: add devicetree support
Add support for devicetree probe for the rcar-vin driver. Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> [g.liakhovetski@gmx.de fix a typo, sort headers alphabetically] Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
-rw-r--r--Documentation/devicetree/bindings/media/rcar_vin.txt86
-rw-r--r--drivers/media/platform/soc_camera/rcar_vin.c72
2 files changed, 151 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/media/rcar_vin.txt b/Documentation/devicetree/bindings/media/rcar_vin.txt
new file mode 100644
index 0000000..ba61782
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/rcar_vin.txt
@@ -0,0 +1,86 @@
+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
diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
index 7c4299d..85d579f 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
@@ -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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