linux-kernel - [PATCH 2/3] arm64: dts: add one property to specify the imx8mq pcie phy voltage

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1616142247-13789-2-git-send-email-hongxing.zhu@nxp.com>
Date:   Fri, 19 Mar 2021 16:24:06 +0800
From:   Richard Zhu <hongxing.zhu@....com>
To:     l.stach@...gutronix.de, andrew.smirnov@...il.com,
        shawnguo@...nel.org, kw@...ux.com, bhelgaas@...gle.com,
        stefan@...er.ch, lorenzo.pieralisi@....com
Cc:     linux-pci@...r.kernel.org, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de, Richard Zhu <hongxing.zhu@....com>
Subject: [PATCH 2/3] arm64: dts: add one property to specify the imx8mq pcie phy voltage

Both 1.8v and 3.3v power supplies can be feeded to 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.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
---
 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..30bcf5f583e0 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";
+	pcie-vph-3v3;
 	status = "okay";
 };
 
-- 
2.17.1