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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: Wed, 14 Apr 2021 10:26:14 +0800	[thread overview]
Message-ID: <1618367174-30968-2-git-send-email-hongxing.zhu@nxp.com> (raw)
In-Reply-To: <1618367174-30968-1-git-send-email-hongxing.zhu@nxp.com>

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


WARNING: multiple messages have this Message-ID (diff)
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: Wed, 14 Apr 2021 10:26:14 +0800	[thread overview]
Message-ID: <1618367174-30968-2-git-send-email-hongxing.zhu@nxp.com> (raw)
In-Reply-To: <1618367174-30968-1-git-send-email-hongxing.zhu@nxp.com>

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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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2021-04-14  2:41 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-14  2:26 [PATCH] arm64: dts: imx8mq-evk: add one regulator used to power up Richard Zhu
2021-04-14  2:26 ` Richard Zhu
2021-04-14  2:26 ` Richard Zhu [this message]
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
2021-04-14  3:02     ` Richard Zhu
2021-05-13  7:14   ` Shawn Guo
2021-05-13  7:14     ` Shawn Guo
  -- strict thread matches above, loose matches on Subject: below --
2021-03-29  8:06 Richard Zhu
2021-03-29  8:06 ` Richard Zhu
2021-04-26  1:24 ` Shawn Guo
2021-04-26  1:24   ` Shawn Guo

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