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[1/2] dt-bindings: i2c: mv64xxx: Add variants with offload support

Message ID 20220702052544.31443-1-samuel@sholland.org
State New
Headers show
Series [1/2] dt-bindings: i2c: mv64xxx: Add variants with offload support | expand

Commit Message

Samuel Holland July 2, 2022, 5:25 a.m. UTC
V536 and newer Allwinner SoCs contain an updated I2C controller which
includes an offload engine for master mode. The controller retains the
existing register interface, so the A31 compatible still applies.

Add the V536 compatible and use it as a fallback for other SoCs with the
updated hardware. This includes two SoCs that were already documented
(H616 and A100) and two new SoCs (R329 and D1).

Signed-off-by: Samuel Holland <samuel@sholland.org>
---

 .../devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml   | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

Comments

Andre Przywara July 5, 2022, 10:42 a.m. UTC | #1
On Sat,  2 Jul 2022 00:25:42 -0500
Samuel Holland <samuel@sholland.org> wrote:

Hi,

> V536 and newer Allwinner SoCs contain an updated I2C controller which
> includes an offload engine for master mode. The controller retains the
> existing register interface, so the A31 compatible still applies.
> 
> Add the V536 compatible and use it as a fallback for other SoCs with the
> updated hardware. This includes two SoCs that were already documented
> (H616 and A100) and two new SoCs (R329 and D1).
> 
> Signed-off-by: Samuel Holland <samuel@sholland.org>

That seems correct to me: I couldn't get hold of manuals of some of the new
SoCs, but at least the D1 and H616 indeed add an extra set of registers
for this "TWI driver" offload engine. But the basic operation is still
supported, so the two fallbacks make sense.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>

Cheers,
Andre

> ---
> 
>  .../devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml   | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
> index f771c09aabfc..0ec033e48830 100644
> --- a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
> +++ b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
> @@ -21,10 +21,18 @@ properties:
>            - enum:
>                - allwinner,sun8i-a23-i2c
>                - allwinner,sun8i-a83t-i2c
> +              - allwinner,sun8i-v536-i2c
>                - allwinner,sun50i-a64-i2c
> -              - allwinner,sun50i-a100-i2c
>                - allwinner,sun50i-h6-i2c
> +          - const: allwinner,sun6i-a31-i2c
> +      - description: Allwinner SoCs with offload support
> +        items:
> +          - enum:
> +              - allwinner,sun20i-d1-i2c
> +              - allwinner,sun50i-a100-i2c
>                - allwinner,sun50i-h616-i2c
> +              - allwinner,sun50i-r329-i2c
> +          - const: allwinner,sun8i-v536-i2c
>            - const: allwinner,sun6i-a31-i2c
>        - const: marvell,mv64xxx-i2c
>        - const: marvell,mv78230-i2c
Jernej Škrabec July 5, 2022, 7:51 p.m. UTC | #2
Dne sobota, 02. julij 2022 ob 07:25:42 CEST je Samuel Holland napisal(a):
> V536 and newer Allwinner SoCs contain an updated I2C controller which
> includes an offload engine for master mode. The controller retains the
> existing register interface, so the A31 compatible still applies.
> 
> Add the V536 compatible and use it as a fallback for other SoCs with the
> updated hardware. This includes two SoCs that were already documented
> (H616 and A100) and two new SoCs (R329 and D1).
> 
> Signed-off-by: Samuel Holland <samuel@sholland.org>

Applied, thanks!

Best regards,
Jernej
Wolfram Sang July 6, 2022, 7:28 p.m. UTC | #3
On Sat, Jul 02, 2022 at 12:25:42AM -0500, Samuel Holland wrote:
> V536 and newer Allwinner SoCs contain an updated I2C controller which
> includes an offload engine for master mode. The controller retains the
> existing register interface, so the A31 compatible still applies.
> 
> Add the V536 compatible and use it as a fallback for other SoCs with the
> updated hardware. This includes two SoCs that were already documented
> (H616 and A100) and two new SoCs (R329 and D1).
> 
> Signed-off-by: Samuel Holland <samuel@sholland.org>

Acked-by: Wolfram Sang <wsa@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
index f771c09aabfc..0ec033e48830 100644
--- a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
@@ -21,10 +21,18 @@  properties:
           - enum:
               - allwinner,sun8i-a23-i2c
               - allwinner,sun8i-a83t-i2c
+              - allwinner,sun8i-v536-i2c
               - allwinner,sun50i-a64-i2c
-              - allwinner,sun50i-a100-i2c
               - allwinner,sun50i-h6-i2c
+          - const: allwinner,sun6i-a31-i2c
+      - description: Allwinner SoCs with offload support
+        items:
+          - enum:
+              - allwinner,sun20i-d1-i2c
+              - allwinner,sun50i-a100-i2c
               - allwinner,sun50i-h616-i2c
+              - allwinner,sun50i-r329-i2c
+          - const: allwinner,sun8i-v536-i2c
           - const: allwinner,sun6i-a31-i2c
       - const: marvell,mv64xxx-i2c
       - const: marvell,mv78230-i2c