From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 92F9063D5 for ; Mon, 9 Oct 2023 12:36:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bsTI+DSh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2CC18C433C8; Mon, 9 Oct 2023 12:36:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1696854984; bh=c0y/Sd2/3poO8nSE24c5ez6G0oE8QesIU7bpvamMg3Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=bsTI+DShpVW7TJ/ku9P5433DUrtqotmPJNac2HwHLailMSdlVP7Dr1En76KoHNTqG 0q9bXxHjS4aUL9239PUvOxISMSKSBXW5XwfpvGgzCLxE7lvGHqgH1PawKQ3XtI2Pu/ oQC8M/MKUXI56UmNkViOZotCRSDhrGYcb3jvs8qDjUt8qUS5+nRjBgNDvcAOXuDlmG /1rHi5rdvkAYFBenN8ZmfcjLslnJNrgs2iKDmQO4tVmSYFv2Rgjx766wkbSmSxKK8l 0SUk5HOE3Bn1i8iwnvrdEu7LRhrz+ttmVw8SjEL5/oE9HS2LaBDCd6s08EsrLz474F wS7DZMyUDQ+pA== Date: Mon, 9 Oct 2023 20:36:06 +0800 From: Shawn Guo To: Marek Vasut Cc: linux-arm-kernel@lists.infradead.org, Conor Dooley , Fabio Estevam , Frieder Schrempf , Geert Uytterhoeven , Krzysztof Kozlowski , Magnus Damm , NXP Linux Team , Peng Fan , Pengutronix Kernel Team , Rob Herring , Sascha Hauer , devicetree@vger.kernel.org Subject: Re: [PATCH] arm64: dts: imx8mp: Describe VDD_ARM run and standby voltage for Data Modul i.MX8M Plus eDM SBC Message-ID: <20231009123606.GA733979@dragon> References: <20230831181850.154813-1-marex@denx.de> <20230924142150.GM7231@dragon> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Sun, Oct 08, 2023 at 08:37:34PM +0200, Marek Vasut wrote: > On 9/24/23 16:21, Shawn Guo wrote: > > On Thu, Aug 31, 2023 at 08:18:50PM +0200, Marek Vasut wrote: > > > Describe VDD_ARM (BUCK2) run and standby voltage in DT. > > > > > > Signed-off-by: Marek Vasut > > > --- > > > Cc: Conor Dooley > > > Cc: Fabio Estevam > > > Cc: Frieder Schrempf > > > Cc: Geert Uytterhoeven > > > Cc: Krzysztof Kozlowski > > > Cc: Magnus Damm > > > Cc: Marek Vasut > > > Cc: NXP Linux Team > > > Cc: Peng Fan > > > Cc: Pengutronix Kernel Team > > > Cc: Rob Herring > > > Cc: Sascha Hauer > > > Cc: Shawn Guo > > > Cc: devicetree@vger.kernel.org > > > Cc: linux-arm-kernel@lists.infradead.org > > > --- > > > arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts | 2 ++ > > > 1 file changed, 2 insertions(+) > > > > > > diff --git a/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts > > > index 13674dc64be9d..d98a040860a48 100644 > > > --- a/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts > > > +++ b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts > > > @@ -362,6 +362,8 @@ buck1: BUCK1 { /* VDD_SOC (dual-phase with BUCK3) */ > > > }; > > > buck2: BUCK2 { /* VDD_ARM */ > > > + nxp,dvs-run-voltage = <950000>; > > > + nxp,dvs-standby-voltage = <850000>; > > > > Buck2 is not turned off in DSM on i.MX8MP? > > It is turned off in SUSPEND/SNVS/OFF , not in IDLE/RUN . Right. But nxp,dvs-standby-voltage specifies the voltage when PMIC is in STANDBY mode. My understanding is that the SoC will be in SUSPEND state while PMIC is in STANDBY mode. Is it possible that the SoC in IDLE/RUN while PMIC is in STANDBY mode at all? Shawn