Re: [PATCH] dt-bindings: i2c: Add armada-38x i2c binding

From: Gregory CLEMENT
Date: Fri Sep 22 2017 - 03:30:59 EST


Hi Kalyan,

On ven., sept. 22 2017, Kalyan Kinthada <kalyan.kinthada@xxxxxxxxxxxxxxxxxxx> wrote:

> All armada-38x variants(380, 385, 388) SoCs have an issue
> in i2c controller which violates the i2c repeated start timing.


Did you had an issue with one of the SoC ?
If yes what was your setting ?
On my side I never managed to have this sort of issue on Armada 38x.

>
> This errata is fixed in the i2c-mv64xxx driver but enabled
> only for devices with compatible string "marvell,mv78230-i2c".

In this case why not just adding the "marvell,mv78230-i2c" as compatible
string in the appropriate device tree files ?

Gregory

>
> This patch introduces a new compatible string
> "marvell,armada-38x-i2c" for the i2c controller on armada-38x SoCs
> so that the workaound is enabled.


>
> Signed-off-by: Kalyan Kinthada <kalyan.kinthada@xxxxxxxxxxxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
> index 5c30026921..fc100b6bdb 100644
> --- a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
> +++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
> @@ -14,6 +14,7 @@ Required properties :
> very rare, initial version of the SoC which
> had broken offload support. Linux
> auto-detects this and sets it appropriately.
> + - "marvell,armada-38x-i2c"
> - interrupts : The interrupt number
>
> Optional properties :
> --
> 2.14.1
>

--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com