From: Richard Zhu <hongxing.zhu@nxp.com>
To: shawnguo@kernel.org
Cc: l.stach@pengutronix.de, linux-imx@nxp.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Richard Zhu <hongxing.zhu@nxp.com>
Subject: [PATCH] arm64: dts: imx8mq-evk: add one regulator used to power up pcie phy
Date: Mon, 29 Mar 2021 16:06:03 +0800 [thread overview]
Message-ID: <1617005163-29824-1-git-send-email-hongxing.zhu@nxp.com> (raw)
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 <hongxing.zhu@nxp.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
---
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>;
status = "okay";
};
--
2.17.1
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next reply other threads:[~2021-03-29 16:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 8:06 Richard Zhu [this message]
2021-04-26 1:24 ` [PATCH] arm64: dts: imx8mq-evk: add one regulator used to power up pcie phy Shawn Guo
2021-04-14 2:26 [PATCH] arm64: dts: imx8mq-evk: add one regulator used to power up Richard Zhu
2021-04-14 2:26 ` [PATCH] arm64: dts: imx8mq-evk: add one regulator used to power up pcie phy Richard Zhu
2021-04-14 3:02 ` Richard Zhu
2021-05-13 7:14 ` Shawn Guo
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