From: kever.yang@rock-chips.com (Kever Yang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/2] Increase the maximum cpu frequency of rk3288
Date: Wed, 26 Nov 2014 00:13:40 +0800 [thread overview]
Message-ID: <5474AAB4.2060301@rock-chips.com> (raw)
In-Reply-To: <1416908253-31721-1-git-send-email-zyw@rock-chips.com>
Hi Chris,
On 11/25/2014 05:37 PM, Chris Zhong wrote:
> The maximum cpu frequency of rk3288 can up to 1.8Ghz, but the vdd_cpu need set
> to 1.4v. I've tested these patches on rk3288 evb board.
I'm not sure why you need this patch, I think we have a discuss
for the cpu operating point before.
In this case:
1. rk3288.dtsi is for all the rk3288 Soc based system, you may need
a separate opp table in rk3288-evb-rk808.dts;
2. 1.4V may beyond the supported voltage range too much,
and it's not a good idea to add it to rk3288.dtsi as a safe voltage.
3. Do you have a stress/heavy load test on evb with 1.4v at 1.8GHz?
- Kever
>
>
> Chris Zhong (2):
> ARM: dts: rockchip: change the max voltage of cpu to 1.4v
> ARM: dts: rk3288: change the max clk of cpu to 1.8Ghz
>
> arch/arm/boot/dts/rk3288-evb-rk808.dts | 2 +-
> arch/arm/boot/dts/rk3288.dtsi | 6 ++++--
> 2 files changed, 5 insertions(+), 3 deletions(-)
>
WARNING: multiple messages have this Message-ID (diff)
From: Kever Yang <kever.yang@rock-chips.com>
To: Chris Zhong <zyw@rock-chips.com>, heiko@sntech.de, dianders@chromium.org
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, Russell King <linux@arm.linux.org.uk>,
Pawel Moll <pawel.moll@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Linus Walleij <linus.walleij@linaro.org>,
linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org,
Rob Herring <robh+dt@kernel.org>,
Kumar Gala <galak@codeaurora.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 0/2] Increase the maximum cpu frequency of rk3288
Date: Wed, 26 Nov 2014 00:13:40 +0800 [thread overview]
Message-ID: <5474AAB4.2060301@rock-chips.com> (raw)
In-Reply-To: <1416908253-31721-1-git-send-email-zyw@rock-chips.com>
Hi Chris,
On 11/25/2014 05:37 PM, Chris Zhong wrote:
> The maximum cpu frequency of rk3288 can up to 1.8Ghz, but the vdd_cpu need set
> to 1.4v. I've tested these patches on rk3288 evb board.
I'm not sure why you need this patch, I think we have a discuss
for the cpu operating point before.
In this case:
1. rk3288.dtsi is for all the rk3288 Soc based system, you may need
a separate opp table in rk3288-evb-rk808.dts;
2. 1.4V may beyond the supported voltage range too much,
and it's not a good idea to add it to rk3288.dtsi as a safe voltage.
3. Do you have a stress/heavy load test on evb with 1.4v at 1.8GHz?
- Kever
>
>
> Chris Zhong (2):
> ARM: dts: rockchip: change the max voltage of cpu to 1.4v
> ARM: dts: rk3288: change the max clk of cpu to 1.8Ghz
>
> arch/arm/boot/dts/rk3288-evb-rk808.dts | 2 +-
> arch/arm/boot/dts/rk3288.dtsi | 6 ++++--
> 2 files changed, 5 insertions(+), 3 deletions(-)
>
next prev parent reply other threads:[~2014-11-25 16:13 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-25 9:37 [PATCH 0/2] Increase the maximum cpu frequency of rk3288 Chris Zhong
2014-11-25 9:37 ` Chris Zhong
2014-11-25 9:37 ` [PATCH 1/2] ARM: dts: rockchip: change the max voltage of cpu to 1.4v Chris Zhong
2014-11-25 9:37 ` Chris Zhong
2014-11-25 9:37 ` [PATCH 2/2] ARM: dts: rk3288: change the max clk of cpu to 1.8Ghz Chris Zhong
2014-11-25 9:37 ` Chris Zhong
2014-11-25 16:13 ` Kever Yang [this message]
2014-11-25 16:13 ` [PATCH 0/2] Increase the maximum cpu frequency of rk3288 Kever Yang
2014-11-25 16:23 ` Heiko Stübner
2014-11-25 16:23 ` Heiko Stübner
2014-11-25 17:37 ` Doug Anderson
2014-11-25 17:37 ` Doug Anderson
2014-11-25 17:37 ` Doug Anderson
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