linux-kernel - RE: [PATCH 2/6] dt-bindings: i2c: tegra: Add Tegra234 details

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Message-ID: <DM5PR12MB185019E59EC5D39113F54F59C02E9@DM5PR12MB1850.namprd12.prod.outlook.com>
Date:   Wed, 9 Feb 2022 03:54:45 +0000
From:   Akhil R <akhilrajeev@...dia.com>
To:     Rob Herring <robh@...nel.org>
CC:     "thierry.reding@...il.com" <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        "digetx@...il.com" <digetx@...il.com>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 2/6] dt-bindings: i2c: tegra: Add Tegra234 details

> On Thu, Jan 13, 2022 at 07:00:19PM +0530, Akhil R wrote:
> > Add documentation for Tegra234 I2C compatible.
> >
> > Signed-off-by: Akhil R <akhilrajeev@...dia.com>
> > ---
> >  Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml | 5
> > +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git
> > a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
> > b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
> > index 424a4fc..c58e256 100644
> > --- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
> > +++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
> > @@ -80,6 +80,11 @@ properties:
> >            support for 64 KiB transactions whereas earlier chips supported no
> >            more than 4 KiB per transactions.
> >          const: nvidia,tegra194-i2c
> > +      - description: |
> > +          Tegra234 has 8 generic I2C controllers, two of which are in the AON
> > +          (always-on) partition of the SoC. All of these controllers are
> > +          similar to those found on Tegra194.
> > +        const: nvidia,tegra234-i2c
> 
> Sounds like this needs a fallback to nvidia,tegra194-i2c if it works, but without
> optimal timing.
Yes. The timing for tegra194 works for tegra234 as well. So, this change is reverted.
I had sent the patch updated. Latest is here - https://lkml.org/lkml/2022/1/24/335
Only the device tree nodes are required to be added now.

Thanks,
Akhil