i2c: rcar: add compatible entry for r8a7791

While we are here, also brush up the devicetree binding documentation.
The example was an inappropriate copy from the sh_mobile driver.

Signed-off-by: Wolfram Sang <wsa@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
(cherry picked from commit e89364556824cc7a947f99173af842217074c099)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/Documentation/devicetree/bindings/i2c/i2c-rcar.txt b/Documentation/devicetree/bindings/i2c/i2c-rcar.txt
index 897cfcd..dd8b2dd 100644 (file)
--- a/Documentation/devicetree/bindings/i2c/i2c-rcar.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-rcar.txt
@@ -6,6 +6,7 @@ Required properties:
        "renesas,i2c-r8a7778"
        "renesas,i2c-r8a7779"
        "renesas,i2c-r8a7790"
+       "renesas,i2c-r8a7791"
 - reg: physical base address of the controller and length of memory mapped
   region.
 - interrupts: interrupt specifier.
@@ -13,11 +14,16 @@ Required properties:
 Optional properties:
 - clock-frequency: desired I2C bus clock frequency in Hz. The absence of this
   propoerty indicates the default frequency 100 kHz.
+- clocks: clock specifier.
 
 Examples :
 
-i2c0: i2c@e6500000 {
-       compatible = "renesas,i2c-rcar-h2";
-       reg = <0 0xe6500000 0 0x428>;
-       interrupts = <0 174 0x4>;
+i2c0: i2c@e6508000 {
+       #address-cells = <1>;
+       #size-cells = <0>;
+       compatible = "renesas,i2c-r8a7791";
+       reg = <0 0xe6508000 0 0x40>;
+       interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>;
+       clocks = <&mstp9_clks R8A7791_CLK_I2C0>;
+       clock-frequency = <400000>;
 };

diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index d3c5d62..233812c 100644 (file)
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -645,6 +645,7 @@ static const struct of_device_id rcar_i2c_dt_ids[] = {
        { .compatible = "renesas,i2c-r8a7778", .data = (void *)I2C_RCAR_GEN1 },
        { .compatible = "renesas,i2c-r8a7779", .data = (void *)I2C_RCAR_GEN1 },
        { .compatible = "renesas,i2c-r8a7790", .data = (void *)I2C_RCAR_GEN2 },
+       { .compatible = "renesas,i2c-r8a7791", .data = (void *)I2C_RCAR_GEN2 },
        {},
 };
 MODULE_DEVICE_TABLE(of, rcar_i2c_dt_ids);