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submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 16403240102 for ; Mon, 23 Mar 2020 20:17:59 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1584991079; bh=CneVslm+9nU3I8yqcNHFjyzSwOWZSvXKgwlbLmtkD8g=; h=Subject:To:From:Autocrypt:Date:From; b=BGDWnVv+vu+SQMStvDcJMs4JWkud4MZiOjC2TytR/nbSySeWgkyqUIX1WIGEPn72A L6IPQfQCCatoxF8cAjaARvtvORahe2Df0zVH2IfUMJfOguADTG2HOWL5E7MiCkoFw1 a+KOmjzCPajY+Q1Qc061R1zUmFEuTkDFK15HDFB1xeRipqAuwcKoRB2HvPK2KoOpBe xMC1/lIEadmiNKINpXwaSkykgAuv9q8M5jTFCpfdXSWWom69bqhaOghXZ21T2atm+G 5s8tdOJmYU+e7nSUZ82iZsrmc8YwjXbXbqzx5PhF0GzjTCEg/8xMyGHJKKsgEIFrlp /1SuNEMrAC8HQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 48mPKd07lgz9rxW; Mon, 23 Mar 2020 20:17:56 +0100 (CET) Subject: Re: [PATCH] arm64: dts: imx8mq-librem5-devkit: Use 0.9V for VDD_GPU To: =?UTF-8?Q?Guido_G=c3=bcnther?= , Rob Herring , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , "Angus Ainslie (Purism)" , Abel Vesa , Anson Huang , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: From: Martin Kepplinger Autocrypt: addr=martink@posteo.de; keydata= mQINBFULfZABEADRxJqDOYAHfrp1w8Egcv88qoru37k1x0Ugy8S6qYtKLAAt7boZW+q5gPv3 Sj2KjfkWA7gotXpASN21OIfE/puKGwhDLAySY1DGNMQ0gIVakUO0ji5GJPjeB9JlmN5hbA87 Si9k3yKQQfv7Cf9Lr1iZaV4A4yjLP/JQMImaCVdC5KyqJ98Luwci1GbsLIGX3EEjfg1+MceO dnJTKZpBAKd1J7S2Ib3dRwvALdiD7zqMGqkw5xrtwasatS7pc6o/BFgA9GxbeIzKmvW/hc3Q amS/sB12BojyzdUJ3TnIoAqvwKTGcv5VYo2Z+3FV+/MJVXPo8cj2vmfxQx1WG4n6X0pK4X8A BkCKw2N/evMZblNqAzzGVtoJvqQYkzQ20Fm+d3wFl6lS1db4MB+kU13G8kEIE22Q3i6kx4NA N49FLlPeDabGfJUyDaZp5pmKdcd7/FIGH/HjShjx7g+LKSwWNMkDygr4WARAP4h8zYDZuNqe ofPvMLqJxHeexBPIGF/+OwMyTvM7otP5ODuFmq6OqjNPf1irJmkiFv3yEa+Ip0vZzwl4XvrZ U0IKjSy2rbRLg22NsJT0XVZJbutIXYSvIHGqSxzzfiOOLnRjR++fbeEoVlRJ4NZHDKCh3pJv LNd+j03jXr4Rm058YLgO7164yr7FhMZniBJw6z648rk8/8gGPQARAQABtCVNYXJ0aW4gS2Vw 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en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 19.03.20 17:46, Guido Günther wrote: > According to the imx8mq data sheet running VDD_GPU at 0.9V is enough > when not overclocking to 1GHz (which we currently don't do). > > Signed-off-by: Guido Günther > --- > arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts > index c47a26cf8e43..736b250bc9c2 100644 > --- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts > +++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts > @@ -318,7 +318,7 @@ > regulator-min-microvolt = <700000>; > regulator-max-microvolt = <1300000>; > regulator-always-on; > - rohm,dvs-run-voltage = <1000000>; > + rohm,dvs-run-voltage = <900000>; > }; > > buck4_reg: BUCK4 { > since I'm running this now: Tested-by: Martin Kepplinger thanks