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@xxxxxxxxxxxxx>
> > ---
> > .../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@020cc000 {
> > + 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@020d0000 { /* 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@020d0000 {
> > 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@020d0000 {
> > --
> > 1.9.1
> >
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