linux-kernel - Re: [PATCH v2 1/3] ARM: dts: imx6: add pm_power

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Message-ID: <20140917034514.GF27452@Robin-OptiPlex-780>
Date:	Wed, 17 Sep 2014 11:45:15 +0800
From:	Robin Gong <b38343@...escale.com>
To:	Shawn Guo <shawn.guo@...escale.com>
CC:	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<kernel@...gutronix.de>, <sre@...nel.org>, <dbaryshkov@...il.com>,
	<dwmw2@...radead.org>, <grant.likely@...aro.org>,
	<linux@....linux.org.uk>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 1/3] ARM: dts: imx6: add pm_power_off support for
 i.mx6 chips

On Wed, Sep 17, 2014 at 10:10:45AM +0800, Shawn Guo wrote:
> On Fri, Sep 12, 2014 at 04:48:57PM +0800, Robin Gong wrote:
> > All chips of i.mx6 can be powered off by programming SNVS.
> > For example :
> > On i.mx6q-sabresd board, PMIC_ON_REQ connect with external
> > pmic ON/OFF pin, that will cause the whole PMIC powered off
> > except VSNVS. And system can restart once PMIC_ON_REQ goes
> > high by push POWRER key.
> 
> What's the behavior for those boards on which PMIC_ON_REQ isn't
> connected to anywhere?
>
System can't be powered off if not connect PMIC_ON_REQ. Although all of our
reference design for i.mx6 chips are connecting  PMIC_ON_REQ with external
PMIC, we need consider others may not use external PMIC. I'll add the info
into commit log or Kconfig.
> BTW, the commit log of the driver patch [[PATCH v2 2/3] ] should be
> improved.
> 
> Shawn
>
You mean the above info need added into commit log ,right?
> > 
> > Signed-off-by: Robin Gong <b38343@...escale.com>
> > ---
> >  .../bindings/power_supply/imx-snvs-poweroff.txt     | 21 +++++++++++++++++++++
> >  arch/arm/boot/dts/imx6qdl.dtsi                      |  5 +++++
> >  arch/arm/boot/dts/imx6sl.dtsi                       |  5 +++++
> >  arch/arm/boot/dts/imx6sx.dtsi                       |  5 +++++
> >  4 files changed, 36 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt b/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt
> > new file mode 100644
> > index 0000000..1a3ab9a
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt
> > @@ -0,0 +1,21 @@
> > +i.mx6 Poweroff Driver
> > +
> > +SNVS_LPCR in SNVS module can power off the whole system by pull
> > +PMIC_ON_REQ low.
> > +
> > +Required Properties:
> > +-compatible: "fsl,sec-v4.0-poweroff"
> > +-reg: Specifies the physical address of the SNVS_LPCR register
> > +
> > +Example:
> > +	snvs@...cc000 {
> > +		compatible = "fsl,sec-v4.0-mon", "simple-bus";
> > +		#address-cells = <1>;
> > +		#size-cells = <1>;
> > +		ranges = <0 0x020cc000 0x4000>;
> > +		.....
> > +		snvs-poweroff@38 {
> > +			compatible = "fsl,sec-v4.0-poweroff";
> > +			reg = <0x38 0x4>;
> > +		};
> > +	}
> > diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
> > index 70d7207..d2d7563 100644
> > --- a/arch/arm/boot/dts/imx6qdl.dtsi
> > +++ b/arch/arm/boot/dts/imx6qdl.dtsi
> > @@ -650,6 +650,11 @@
> >  					interrupts = <0 19 IRQ_TYPE_LEVEL_HIGH>,
> >  						     <0 20 IRQ_TYPE_LEVEL_HIGH>;
> >  				};
> > +
> > +				snvs-poweroff@38 {
> > +					compatible = "fsl,sec-v4.0-poweroff";
> > +					reg = <0x38 0x4>;
> > +				};
> >  			};
> >  
> >  			epit1: epit@...d0000 { /* EPIT1 */
> > diff --git a/arch/arm/boot/dts/imx6sl.dtsi b/arch/arm/boot/dts/imx6sl.dtsi
> > index ba67714..6e1d8f6 100644
> > --- a/arch/arm/boot/dts/imx6sl.dtsi
> > +++ b/arch/arm/boot/dts/imx6sl.dtsi
> > @@ -568,6 +568,11 @@
> >  					interrupts = <0 19 IRQ_TYPE_LEVEL_HIGH>,
> >  						     <0 20 IRQ_TYPE_LEVEL_HIGH>;
> >  				};
> > +
> > +				snvs-poweroff@38 {
> > +					compatible = "fsl,sec-v4.0-poweroff";
> > +					reg = <0x38 0x4>;
> > +				};
> >  			};
> >  
> >  			epit1: epit@...d0000 {
> > diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
> > index d137caca..c1f937e 100644
> > --- a/arch/arm/boot/dts/imx6sx.dtsi
> > +++ b/arch/arm/boot/dts/imx6sx.dtsi
> > @@ -671,6 +671,11 @@
> >  					reg = <0x34 0x58>;
> >  					interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
> >  				};
> > +
> > +				snvs-poweroff@38 {
> > +					compatible = "fsl,sec-v4.0-poweroff";
> > +					reg = <0x38 0x4>;
> > +				};
> >  			};
> >  
> >  			epit1: epit@...d0000 {
> > -- 
> > 1.9.1
> > 
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