Re: [linux-sunxi] Re: [PATCH 10/11] arm64: allwinner: a64: enable AXP803 regulators for Pine64

[Icenowy Zheng <icenowy@aosc.io>]

2017年4月5日 14:13于 Maxime Ripard <maxime.ripard@free-electrons.com>写道：
>
> On Wed, Apr 05, 2017 at 02:01:44AM +0800, Icenowy Zheng wrote: 
> > Add support of AXP803 regulators in the Pine64 device tree, in order to 
> > enable many future functionalities, e.g. Wi-Fi. 
> > 
> > Signed-off-by: Icenowy Zheng <icenowy@aosc.io> 
> > --- 
> >  .../arm64/boot/dts/allwinner/sun50i-a64-pine64.dts | 109 +++++++++++++++++++++ 
> >  1 file changed, 109 insertions(+) 
> > 
> > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts 
> > index 2132d8e6cb3d..7da074f95065 100644 
> > --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts 
> > +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts 
> > @@ -106,6 +106,115 @@ 
> >  }; 
> >  }; 
> >  
> > +#include "axp803.dtsi" 
> > + 
> > +&reg_aldo1 { 
> > + regulator-min-microvolt = <2800000>; 
> > + regulator-max-microvolt = <2800000>; 
> > + regulator-name = "vcc-csi"; 
> > +}; 
> > + 
> > +&reg_aldo2 { 
> > + regulator-always-on; 
> > + regulator-min-microvolt = <1800000>; 
> > + regulator-max-microvolt = <3300000>; 
> > + regulator-name = "vcc-pl"; 
> > +}; 
> > + 
> > +&reg_aldo3 { 
> > + regulator-always-on; 
> > + regulator-min-microvolt = <2700000>; 
> > + regulator-max-microvolt = <3300000>; 
> > + regulator-name = "vcc-pll-avcc"; 
> > +}; 
> > + 
> > +&reg_dc1sw { 
> > + regulator-name = "vcc-phy"; 
> > +}; 
> > + 
> > +&reg_dcdc1 { 
> > + regulator-always-on; 
> > + regulator-min-microvolt = <3300000>; 
> > + regulator-max-microvolt = <3300000>; 
> > + regulator-name = "vcc-3v3"; 
> > +}; 
> > + 
> > +&reg_dcdc2 { 
> > + regulator-always-on; 
> > + regulator-min-microvolt = <1000000>; 
> > + regulator-max-microvolt = <1300000>; 
> > + regulator-name = "vdd-cpux"; 
> > +}; 
> > + 
> > +/* DCDC3 is polyphased with DCDC2 */ 
> > + 
> > +&reg_dcdc5 { 
> > + regulator-always-on; 
> > + regulator-min-microvolt = <1500000>; 
> > + regulator-max-microvolt = <1500000>; 
> > + regulator-name = "vcc-dram"; 
> > +}; 
> > + 
> > +&reg_dcdc6 { 
> > + regulator-always-on; 
> > + regulator-min-microvolt = <1100000>; 
> > + regulator-max-microvolt = <1100000>; 
> > + regulator-name = "vdd-sys"; 
> > +}; 
> > + 
> > +&reg_dldo1 { 
> > + regulator-min-microvolt = <3300000>; 
> > + regulator-max-microvolt = <3300000>; 
> > + regulator-name = "vcc-hdmi"; 
> > +}; 
> > + 
> > +&reg_dldo2 { 
> > + regulator-min-microvolt = <3300000>; 
> > + regulator-max-microvolt = <3300000>; 
> > + regulator-name = "vcc-mipi"; 
> > +}; 
> > + 
> > +&reg_dldo3 { 
> > + regulator-min-microvolt = <3300000>; 
> > + regulator-max-microvolt = <3300000>; 
> > + regulator-name = "avdd-csi"; 
> > +}; 
> > + 
> > +&reg_dldo4 { 
> > + regulator-min-microvolt = <3300000>; 
> > + regulator-max-microvolt = <3300000>; 
> > + regulator-name = "vcc-wifi"; 
> > +}; 
> > + 
> > +&reg_eldo1 { 
> > + regulator-min-microvolt = <1800000>; 
> > + regulator-max-microvolt = <1800000>; 
> > + regulator-name = "cpvdd"; 
> > +}; 
> > + 
> > +&reg_eldo3 { 
> > + regulator-min-microvolt = <1800000>; 
> > + regulator-max-microvolt = <1800000>; 
> > + regulator-name = "vdd-1v8-csi"; 
> > +}; 
> > + 
> > +&reg_fldo1 { 
> > + regulator-min-microvolt = <1200000>; 
> > + regulator-max-microvolt = <1200000>; 
> > + regulator-name = "vcc-1v2-hsic"; 
> > +}; 
> > + 
> > +&reg_fldo2 { 
> > + regulator-always-on; 
> > + regulator-min-microvolt = <1100000>; 
> > + regulator-max-microvolt = <1100000>; 
> > + regulator-name = "vdd-cpus"; 
> > +}; 
>
> Why do you need to always power the AR100 on? 

It's for CPUS power domain, not the AR100 processor.

Kill it will lead to instantly system hang.

>
> Maxime 
>
> -- 
> Maxime Ripard, Free Electrons 
> Embedded Linux and Kernel engineering 
> http://free-electrons.com 
>
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