[PATCH 1/3 v2] media: soc_camera: rcar_vin: Add rcar fallback compatibility string

[Yoshihiro Kaneko <ykaneko0929@gmail.com>]

Add fallback compatibility string for R-Car Gen2 and Gen3, This is
in keeping with the fallback scheme being adopted wherever appropriate
for drivers for Renesas SoCs.

Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
---

v2 [Yoshihiro Kaneko]
* As suggested by Geert Uytterhoeven
  drivers/media/platform/soc_camera/rcar_vin.c:
    - The generic compatibility values are listed at the end of the
      rcar_vin_of_table[].

 Documentation/devicetree/bindings/media/rcar_vin.txt | 8 +++++++-
 drivers/media/platform/soc_camera/rcar_vin.c         | 3 +++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/media/rcar_vin.txt b/Documentation/devicetree/bindings/media/rcar_vin.txt
index 9dafe6b..c13ec5a 100644
--- a/Documentation/devicetree/bindings/media/rcar_vin.txt
+++ b/Documentation/devicetree/bindings/media/rcar_vin.txt
@@ -6,12 +6,18 @@ 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,rcar-gen2-vin" for R-Car Gen2 Series
+   - "renesas,rcar-gen3-vin" for R-Car Gen3 Series
    - "renesas,vin-r8a7794" for the R8A7794 device
    - "renesas,vin-r8a7793" for the R8A7793 device
    - "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
+
+   When compatible with the generic version, nodes must list the SoC-specific
+   version corresponding to the platform first followed by the generic version.
+
  - reg: the register base and size for the device registers
  - interrupts: the interrupt for the device
  - clocks: Reference to the parent clock
@@ -36,7 +42,7 @@ Device node example
 	};
 
         vin0: vin@0xe6ef0000 {
-                compatible = "renesas,vin-r8a7790";
+                compatible = "renesas,vin-r8a7790","renesas,rcar-gen2-vin";
                 clocks = <&mstp8_clks R8A7790_CLK_VIN0>;
                 reg = <0 0xe6ef0000 0 0x1000>;
                 interrupts = <0 188 IRQ_TYPE_LEVEL_HIGH>;
diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
index b7fd695..f72de0b 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
@@ -143,6 +143,7 @@
 #define RCAR_VIN_BT656			(1 << 3)
 
 enum chip_id {
+	RCAR_GEN3,
 	RCAR_GEN2,
 	RCAR_H1,
 	RCAR_M1,
@@ -1824,6 +1825,8 @@ static const struct of_device_id rcar_vin_of_table[] = {
 	{ .compatible = "renesas,vin-r8a7790", .data = (void *)RCAR_GEN2 },
 	{ .compatible = "renesas,vin-r8a7779", .data = (void *)RCAR_H1 },
 	{ .compatible = "renesas,vin-r8a7778", .data = (void *)RCAR_M1 },
+	{ .compatible = "renesas,rcar-gen2-vin", .data = (void *)RCAR_GEN2 },
+	{ .compatible = "renesas,rcar-gen3-vin", .data = (void *)RCAR_GEN3 },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, rcar_vin_of_table);
-- 
1.9.1