Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-04 Thread Timo Sigurdsson
Hi Maxime, Maxime Ripard schrieb am 03.08.2015 11:34: > On Mon, Aug 03, 2015 at 11:03:52AM +0200, Timo Sigurdsson wrote: >> Julian Calaby schrieb am 03.08.2015 06:22: >> > My only real objection here is are there boards that can go down to >> > 0.9v and if so, won't this change make them less pow

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-03 Thread Julian Calaby
Hi Maxime, On Mon, Aug 3, 2015 at 7:34 PM, Maxime Ripard wrote: > On Mon, Aug 03, 2015 at 11:03:52AM +0200, Timo Sigurdsson wrote: >> Hi again, >> >> Julian Calaby schrieb am 03.08.2015 06:22: >> > My only real objection here is are there boards that can go down to >> > 0.9v and if so, won't this

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-03 Thread Maxime Ripard
On Mon, Aug 03, 2015 at 11:03:52AM +0200, Timo Sigurdsson wrote: > Hi again, > > Julian Calaby schrieb am 03.08.2015 06:22: > > My only real objection here is are there boards that can go down to > > 0.9v and if so, won't this change make them less power efficient in > > the almost-idle case? And

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-03 Thread Maxime Ripard
On Mon, Aug 03, 2015 at 02:22:13PM +1000, Julian Calaby wrote: > >> Is the code that uses this smart enough to sensibly switch between two > >> operating points with the same frequency and different voltages? If > >> so, maybe just add a 144MHz @ 1.0v operating point? > > > > You could try. Though

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-03 Thread Maxime Ripard
On Mon, Aug 03, 2015 at 10:37:51AM +0200, Timo Sigurdsson wrote: > Hi Julian, > > Julian Calaby schrieb am 03.08.2015 01:35: > >> sun7i-a20.dtsi contains an cpufreq operating point at 0.9 volts. Most A20 > >> boards > >> (or all?), however, do not allow the voltage to go below 1.0V. Thus, raise >

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-03 Thread Maxime Ripard
On Mon, Aug 03, 2015 at 09:35:51AM +1000, Julian Calaby wrote: > Hi Timo, > > On Mon, Aug 3, 2015 at 5:23 AM, Timo Sigurdsson > wrote: > > sun7i-a20.dtsi contains an cpufreq operating point at 0.9 volts. Most A20 > > boards > > (or all?), however, do not allow the voltage to go below 1.0V. Thus,

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-03 Thread Timo Sigurdsson
Hi again, Julian Calaby schrieb am 03.08.2015 06:22: > My only real objection here is are there boards that can go down to > 0.9v and if so, won't this change make them less power efficient in > the almost-idle case? And are those power savings enough to justify > not accepting this patch? It wil

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-03 Thread Timo Sigurdsson
Hi Julian, Julian Calaby schrieb am 03.08.2015 01:35: >> sun7i-a20.dtsi contains an cpufreq operating point at 0.9 volts. Most A20 >> boards >> (or all?), however, do not allow the voltage to go below 1.0V. Thus, raise >> the >> voltage for the lowest operating point to 1.0V so all boards can act

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-02 Thread Chen-Yu Tsai
On Mon, Aug 3, 2015 at 12:22 PM, Julian Calaby wrote: > Hi Chen-Yu, > > On Mon, Aug 3, 2015 at 12:37 PM, Chen-Yu Tsai wrote: >> Hi, >> >> On Mon, Aug 3, 2015 at 7:35 AM, Julian Calaby >> wrote: >>> Hi Timo, >>> >>> On Mon, Aug 3, 2015 at 5:23 AM, Timo Sigurdsson >>> wrote: sun7i-a20.dtsi

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-02 Thread Julian Calaby
Hi Chen-Yu, On Mon, Aug 3, 2015 at 12:37 PM, Chen-Yu Tsai wrote: > Hi, > > On Mon, Aug 3, 2015 at 7:35 AM, Julian Calaby wrote: >> Hi Timo, >> >> On Mon, Aug 3, 2015 at 5:23 AM, Timo Sigurdsson >> wrote: >>> sun7i-a20.dtsi contains an cpufreq operating point at 0.9 volts. Most A20 >>> boards >

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-02 Thread Chen-Yu Tsai
Hi, On Mon, Aug 3, 2015 at 7:35 AM, Julian Calaby wrote: > Hi Timo, > > On Mon, Aug 3, 2015 at 5:23 AM, Timo Sigurdsson > wrote: >> sun7i-a20.dtsi contains an cpufreq operating point at 0.9 volts. Most A20 >> boards >> (or all?), however, do not allow the voltage to go below 1.0V. Thus, raise

Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-02 Thread Julian Calaby
Hi Timo, On Mon, Aug 3, 2015 at 5:23 AM, Timo Sigurdsson wrote: > sun7i-a20.dtsi contains an cpufreq operating point at 0.9 volts. Most A20 > boards > (or all?), however, do not allow the voltage to go below 1.0V. Thus, raise the > voltage for the lowest operating point to 1.0V so all boards can

[linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

2015-08-02 Thread Timo Sigurdsson
sun7i-a20.dtsi contains an cpufreq operating point at 0.9 volts. Most A20 boards (or all?), however, do not allow the voltage to go below 1.0V. Thus, raise the voltage for the lowest operating point to 1.0V so all boards can actually use it. Signed-off-by: Timo Sigurdsson --- arch/arm/boot/dts/s