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

From Maxime Ripard <maxime.ripard@free-electrons.com>
Newsgroups linux.kernel
Subject Re: [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply
Date 2015-08-03 11:20 +0200
Message-ID <pTk4y-79G-5@gated-at.bofh.it> (permalink)
References <pT77k-4WI-7@gated-at.bofh.it>
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On Sun, Aug 02, 2015 at 09:23:06PM +0200, 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 actually use
> it.

This is not a property of a board, but is the actual limit documented
by Allwinner for the A20. Some individual SoCs might have wider
tolerances, but that's not a property of a board, it's really a
property of a single SoC, and we cannot make any assumption on the
board.

(and please make sure to run checkpatch before sending your patches)

Thanks!
Maxime

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

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Thread

[PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply Timo Sigurdsson <public_timo.s@silentcreek.de> - 2015-08-02 21:30 +0200
  Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage  for sun7i-a20 to a level all boards can supply Julian Calaby <julian.calaby@gmail.com> - 2015-08-03 01:40 +0200
    Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage  for sun7i-a20 to a level all boards can supply Chen-Yu Tsai <wens@csie.org> - 2015-08-03 04:40 +0200
      Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage  for sun7i-a20 to a level all boards can supply Julian Calaby <julian.calaby@gmail.com> - 2015-08-03 06:30 +0200
        Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage  for sun7i-a20 to a level all boards can supply Chen-Yu Tsai <wens@csie.org> - 2015-08-03 06:30 +0200
        Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply "Timo Sigurdsson" <public_timo.s@silentcreek.de> - 2015-08-03 11:10 +0200
          Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage  for sun7i-a20 to a level all boards can supply Maxime Ripard <maxime.ripard@free-electrons.com> - 2015-08-03 11:40 +0200
            Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage  for sun7i-a20 to a level all boards can supply Julian Calaby <julian.calaby@gmail.com> - 2015-08-03 11:40 +0200
            Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply "Timo Sigurdsson" <public_timo.s@silentcreek.de> - 2015-08-04 11:00 +0200
        Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage  for sun7i-a20 to a level all boards can supply Maxime Ripard <maxime.ripard@free-electrons.com> - 2015-08-03 11:30 +0200
    Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply "Timo Sigurdsson" <public_timo.s@silentcreek.de> - 2015-08-03 10:40 +0200
      Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage  for sun7i-a20 to a level all boards can supply Maxime Ripard <maxime.ripard@free-electrons.com> - 2015-08-03 11:30 +0200
    Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage  for sun7i-a20 to a level all boards can supply Maxime Ripard <maxime.ripard@free-electrons.com> - 2015-08-03 11:20 +0200
  Re: [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20  to a level all boards can supply Maxime Ripard <maxime.ripard@free-electrons.com> - 2015-08-03 11:20 +0200
    Re: [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply "Timo Sigurdsson" <public_timo.s@silentcreek.de> - 2015-08-04 10:40 +0200

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