linux-kernel - Re: [PATCH] riscv: dts: sifive unmatched: Add gpio poweroff

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Message-ID: <99ac0009-b49a-f618-1b96-7896d6d155ae@comcast.net>
Date:   Fri, 31 Dec 2021 07:35:14 -0800
From:   Ron Economos <w6rz@...cast.net>
To:     James Clarke <jrtc27@...c27.com>
Cc:     Dimitri John Ledkov <dimitri.ledkov@...onical.com>,
        Rob Herring <robh+dt@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Vincent Pelletier <plr.vincent@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Qiu Wenbo <qiuwenbo@...inos.com.cn>,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv: dts: sifive unmatched: Add gpio poweroff

On 12/30/21 10:58 PM, James Clarke wrote:
> On 31 Dec 2021, at 06:11, Ron Economos <w6rz@...cast.net> wrote:
>> This patch is required for the following commit to work.
>>
>> commit f2928e224d85 ("riscv: set default pm_power_off to NULL")
>>
>> Signed-off-by: Ron Economos <w6rz@...cast.net>
>> ---
>> arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 5 +++++
>> 1 file changed, 5 insertions(+)
>>
>> diff --git a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
>> index 6bfa1f24d3de..c4ed9efdff03 100644
>> --- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
>> +++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
>> @@ -39,6 +39,11 @@ rtcclk: rtcclk {
>>         clock-frequency = <RTCCLK_FREQ>;
>>         clock-output-names = "rtcclk";
>>     };
>> +
>> +    gpio-poweroff {
>> +        compatible = "gpio-poweroff";
>> +        gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
>> +    };
> Why? It’s abstracted by firmware, which works.
>
> Jess
>
I didn't realize that OpenSBI 1.0 had been released last week. Please 
disregard this patch.

Ron