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Mon, 26 Apr 2021 01:25:04 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 65AC661078; Mon, 26 Apr 2021 01:25:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619400302; bh=kiWJjYBYqhGRPnapDaXtKh585BBscvLrQg+YFOLyZis=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=DbP+PrNPauTyCxQ9kyjMlwCQvHK9mb5OsUxFp92uXrrcgELQVi0hYpVtQW46hPw1T oYO6RGywipdaC2K2UQUYmVnPn+Sjl3sQe1myfUK/W9kBtllCLc8Xql7Gy61y1IAcNu idU06YgBYObe3CwkBu5tR8/idQvdbGTBecu3q41EhvFO/SM6uPXly1BUSWUSg3xgeS As7h57ASrWj+DsS1MJ7/HsdRwH0SsVezXZPL9SJVusSQZmdhiQvGAd3hL0zQ0zs50W TCII8Q5ANRlvhD83d98ua5aJ9Ny507ZTqUGnnEW3/CZrIycARe/zpe0/0Wm+RZRsex VM1MSNiGJ9J7Q== Date: Mon, 26 Apr 2021 09:24:57 +0800 From: Shawn Guo To: Richard Zhu Cc: l.stach@pengutronix.de, linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm64: dts: imx8mq-evk: add one regulator used to power up pcie phy Message-ID: <20210426012456.GB27585@dragon> References: <1617005163-29824-1-git-send-email-hongxing.zhu@nxp.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1617005163-29824-1-git-send-email-hongxing.zhu@nxp.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210425_182503_073447_DAF00D20 X-CRM114-Status: GOOD ( 15.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Mar 29, 2021 at 04:06:03PM +0800, Richard Zhu wrote: > Both 1.8v and 3.3v power supplies can be used by i.MX8MQ PCIe PHY. > In default, the PCIE_VPH voltage is suggested to be 1.8v refer to data > sheet. When PCIE_VPH is supplied by 3.3v in the HW schematic design, > the VREG_BYPASS bits of GPR registers should be cleared from default > value 1b'1 to 1b'0. Thus, the internal 3v3 to 1v8 translator would be > turned on. > > Signed-off-by: Richard Zhu > Reviewed-by: Lucas Stach > --- > arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts > index 85b045253a0e..4d2035e3dd7c 100644 > --- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts > +++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts > @@ -318,6 +318,7 @@ > <&clk IMX8MQ_CLK_PCIE1_PHY>, > <&pcie0_refclk>; > clock-names = "pcie", "pcie_aux", "pcie_phy", "pcie_bus"; > + vph-supply = <&vgen5_reg>; Hmm, I do not see this in the bindings doc. Shawn > status = "okay"; > }; > > -- > 2.17.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel