[PATCH 4.19.y 1/9] i2c: sh_mobile: document support for r8a77990 (R-Car E3)

Biju Das <biju.das@...>

From: Simon Horman <horms+renesas@verge.net.au>

Document support for the IIC code for the r8a77990 (R-Car E3).

It is not considered compatible with existing fallback bindings
due to the documented absence of automatic transmission registers.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
(cherry picked from commit fca34b910ddc556c51294d58287f7c33863dddef)
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt b/Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt
index 872673a..cc62577 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt
@@ -15,6 +15,7 @@ Required properties:
- "renesas,iic-r8a7795" (R-Car H3)
- "renesas,iic-r8a7796" (R-Car M3-W)
- "renesas,iic-r8a77965" (R-Car M3-N)
+ - "renesas,iic-r8a77990" (R-Car E3)
- "renesas,iic-sh73a0" (SH-Mobile AG5)
- "renesas,rcar-gen2-iic" (generic R-Car Gen2 or RZ/G1
compatible device)
@@ -27,7 +28,13 @@ Required properties:
the platform first followed by the generic R-Car

- renesas,rmobile-iic must always follow.
+ When compatible with "renesas,rmobile-iic" it should
+ be the last compatibility string listed.
+ The r8a77990 (R-Car E3) controller is not
+ considered compatible with "renesas,rcar-gen3-iic"
+ or "renesas,rmobile-iic" due to the absence of
+ automatic transmission registers.

- reg : address start and address range size of device
- interrupts : interrupt of device

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