Merge patch series "can: rcar_canfd: Add support for R-Car V4H systems"

Geert Uytterhoeven <geert+renesas@glider.be> says:

This patch series adds support for the CAN-FD interface on the Renesas
R-Car V4H (R8A779G0) SoC and support for CAN transceivers described as
PHYs to the R-Car CAN-FD driver. It includes several fixes for issues
(some minor) detected while adding the support and during testing.
More details can be found in the individual patches.

This has been tested on the Renesas White-Hawk development board using
cansend, candump, and canfdtest:
  - Channel 0 uses an NXP TJR1443AT CAN transceiver, and works fine,
  - Channels 1-7 use Microchip MCP2558FD-H/SN CAN transceivers (not
    mounted for channels 4-7), which do not need explicit description.
    While channel 1 works fine, channels 2-3 do not seem to work.

Hence despite the new fixes, the test results are similar to what Ulrich
Hecht reported for R-Car V3U on the Falcon development board before,
i.e. only channels 0 and 1 work (FTR, [2] does not help).
Whether this is a CAN-FD driver issue, a pin control issue, an IP core
issue, or an SoC integration issue is still to be seen...

[1] https://lore.kernel.org/all/f53a1bcca637ceeafb04ce3540a605532d3bc34a.1674036164.git.geert+renesas@glider.be
[2] commit e3e5bccc92446048 ("can: rcar_canfd:
    rcar_canfd_configure_afl_rules(): Fix Rx FIFO entry setting") in
    renesas-bsp/v5.10.147/rcar-5.2.0.rc3.

Link: https://lore.kernel.org/all/cover.1674499048.git.geert+renesas@glider.be
[mkl: applying patches 1...11 only]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml

@@ -28,6 +28,12 @@ properties:
               - renesas,r8a77995-canfd     # R-Car D3
           - const: renesas,rcar-gen3-canfd # R-Car Gen3 and RZ/G2
 
+      - items:
+          - enum:
+              - renesas,r8a779a0-canfd     # R-Car V3U
+              - renesas,r8a779g0-canfd     # R-Car V4H
+          - const: renesas,rcar-gen4-canfd # R-Car Gen4
+
       - items:
           - enum:
               - renesas,r9a07g043-canfd    # RZ/G2UL and RZ/Five
@@ -35,8 +41,6 @@ properties:
               - renesas,r9a07g054-canfd    # RZ/V2L
           - const: renesas,rzg2l-canfd     # RZ/G2L family
 
-      - const: renesas,r8a779a0-canfd      # R-Car V3U
-
   reg:
     maxItems: 1
 
@@ -60,7 +64,7 @@ properties:
     $ref: /schemas/types.yaml#/definitions/flag
     description:
       The controller can operate in either CAN FD only mode (default) or
-      Classical CAN only mode.  The mode is global to both the channels.
+      Classical CAN only mode.  The mode is global to all channels.
       Specify this property to put the controller in Classical CAN only mode.
 
   assigned-clocks:
@@ -80,6 +84,10 @@ patternProperties:
       The controller supports multiple channels and each is represented as a
       child node.  Each channel can be enabled/disabled individually.
 
+    properties:
+      phys:
+        maxItems: 1
+
     additionalProperties: false
 
 required:
@@ -159,7 +167,7 @@ allOf:
         properties:
           compatible:
             contains:
-              const: renesas,r8a779a0-canfd
+              const: renesas,rcar-gen4-canfd
     then:
       patternProperties:
         "^channel[2-7]$": false