Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Received-SPF: Pass (protection.outlook.com: domain of xilinx.com designates
 149.199.62.198 as permitted sender) receiver=protection.outlook.com;
 client-ip=149.199.62.198; helo=xsj-pvapexch01.xlnx.xilinx.com;
Envelope-to: git@xilinx.com,
 saikrishna12468@gmail.com,
 linux-gpio@vger.kernel.org,
 devicetree@vger.kernel.org,
 linux-kernel@vger.kernel.org,
 linux-arm-kernel@lists.infradead.org,
 gregkh@linuxfoundation.org,
 robh@kernel.org,
 linus.walleij@linaro.org
Subject: Re: [PATCH 4/4] arm: dts: zynq: Replace 'io-standard' with
 'power-source' property
To:     Linus Walleij <linus.walleij@linaro.org>,
        Rob Herring <robh@kernel.org>
CC:     Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>,
        "Michal Simek" <michal.simek@xilinx.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        git <git@xilinx.com>, <saikrishna12468@gmail.com>
References: <1626868353-96475-1-git-send-email-lakshmi.sai.krishna.potthuri@xilinx.com>
 <1626868353-96475-5-git-send-email-lakshmi.sai.krishna.potthuri@xilinx.com>
 <YQMIhBPwcNw1YqMq@robh.at.kernel.org>
 <CACRpkdYrHTMLL_CQi0BoNZsXV3=2dBK38pkvd+EEkuPrzoG_Cw@mail.gmail.com>
From:   Michal Simek <michal.simek@xilinx.com>
Message-ID: <2f5d9197-4a5e-08b5-7e47-595d337478d2@xilinx.com>
Date:   Fri, 30 Jul 2021 14:46:24 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
 Thunderbird/78.12.0
MIME-Version: 1.0
In-Reply-To: <CACRpkdYrHTMLL_CQi0BoNZsXV3=2dBK38pkvd+EEkuPrzoG_Cw@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Content-Language: en-US
Content-Transfer-Encoding: 7bit
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Jul 2021 12:46:32.7924
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 9cc50e28-05be-458f-b21a-08d953580f4f
X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch01.xlnx.xilinx.com]
X-MS-Exchange-CrossTenant-AuthSource: SN1NAM02FT0014.eop-nam02.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR02MB4393
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


On 7/30/21 2:43 PM, Linus Walleij wrote:
> On Thu, Jul 29, 2021 at 9:59 PM Rob Herring <robh@kernel.org> wrote:
>> On Wed, Jul 21, 2021 at 05:22:33PM +0530, Sai Krishna Potthuri wrote:
>>> Replace 'io-standard' property with 'power-source' property in all zynq dts
>>> files to be in sync with Zynq pinctrl driver.
>>>
>>> Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
>>> ---
>>>  arch/arm/boot/dts/zynq-ebaz4205.dts |  8 ++++----
>>>  arch/arm/boot/dts/zynq-microzed.dts |  2 +-
>>>  arch/arm/boot/dts/zynq-zc702.dts    | 20 ++++++++++----------
>>>  arch/arm/boot/dts/zynq-zc706.dts    | 18 +++++++++---------
>>>  4 files changed, 24 insertions(+), 24 deletions(-)
>>>
>>> diff --git a/arch/arm/boot/dts/zynq-ebaz4205.dts b/arch/arm/boot/dts/zynq-ebaz4205.dts
>>> index b0b836aedd76..be7eae611fb7 100644
>>> --- a/arch/arm/boot/dts/zynq-ebaz4205.dts
>>> +++ b/arch/arm/boot/dts/zynq-ebaz4205.dts
>>> @@ -57,7 +57,7 @@
>>>
>>>               conf {
>>>                       groups = "gpio0_20_grp", "gpio0_32_grp";
>>> -                     io-standard = <3>;
>>> +                     power-source = <3>;
>>
>> This will break using a new DT with a kernel without patch 3.
> 
> The old (Linux) kernel never supported the "io-standard" property
> anyway.
> 
> Unless someone is running som BSD or Windows with support for
> this property it can be merged by the quality of zero real-world
> impacts (no-one there to hear the tree fall in the forest).
> 
> Sai Krishna: correct?

Linux Zynq pinctrl driver and in tree dts files are using io-standard
properties at least from 2015.

M