linux-kernel - Re: [PATCH v8 6/6] ARM: dts: imx6: RIoTboard provide standby on power off option

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Message-ID: <f28ae35c-9011-7bd8-4c41-182afaf973b8@pengutronix.de>
Date:   Thu, 2 Aug 2018 10:37:01 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Robin Gong <yibin.gong@....com>, Shawn Guo <shawnguo@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Cc:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Leonard Crestez <leonard.crestez@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Fabio Estevam <fabio.estevam@....com>,
        Russell King <linux@...linux.org.uk>,
        dl-linux-imx <linux-imx@....com>,
        "A.s. Dong" <aisheng.dong@....com>
Subject: Re: [PATCH v8 6/6] ARM: dts: imx6: RIoTboard provide standby on power
 off option



On 27.07.2018 11:33, Robin Gong wrote:
> 
> 
>> -----Original Message-----
>> From: Oleksij Rempel [mailto:o.rempel@...gutronix.de]
>> Sent: 2018年7月26日 17:22
>> To: Shawn Guo <shawnguo@...nel.org>; Mark Brown <broonie@...nel.org>;
>> Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>> Cc: Oleksij Rempel <o.rempel@...gutronix.de>; kernel@...gutronix.de;
>> devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
>> linux-clk@...r.kernel.org; linux-kernel@...r.kernel.org; Andrew Morton
>> <akpm@...ux-foundation.org>; Liam Girdwood <lgirdwood@...il.com>;
>> Leonard Crestez <leonard.crestez@....com>; Rob Herring
>> <robh+dt@...nel.org>; Mark Rutland <mark.rutland@....com>; Michael
>> Turquette <mturquette@...libre.com>; Stephen Boyd
>> <sboyd@...eaurora.org>; Fabio Estevam <fabio.estevam@....com>; Russell
>> King <linux@...linux.org.uk>; dl-linux-imx <linux-imx@....com>; Robin Gong
>> <yibin.gong@....com>; A.s. Dong <aisheng.dong@....com>
>> Subject: [PATCH v8 6/6] ARM: dts: imx6: RIoTboard provide standby on power
>> off option
>>
>> This board, as well as some other boards with i.MX6 and a PMIC, uses a
>> "PMIC_STBY_REQ" line to notify the PMIC about a state change.
>> The PMIC is programmed for a specific state change before triggering the line.
>> In this case, PMIC_STBY_REQ can be used for stand by, sleep and power off
>> modes.
>>
>> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
>> ---
>>  arch/arm/boot/dts/imx6dl-riotboard.dts | 5 +++++
>>  1 file changed, 5 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/imx6dl-riotboard.dts
>> b/arch/arm/boot/dts/imx6dl-riotboard.dts
>> index 2e98c92adff7..a0e9753ee767 100644
>> --- a/arch/arm/boot/dts/imx6dl-riotboard.dts
>> +++ b/arch/arm/boot/dts/imx6dl-riotboard.dts
>> @@ -90,6 +90,10 @@
>>  	status = "okay";
>>  };
>>
>> +&clks {
>> +	fsl,pmic-stby-poweroff;
>> +};
> It's better remove the default "syscon-poweroff" power off node.

"syscon-poweroff" is by default disabled and not enabled in
arch/arm/boot/dts/imx6dl-riotboard.dts



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