Messages in this thread Patch in this message | | | From | Richard Zhu <> | Subject | [PATCH] arm64: dts: imx8mq-evk: add one regulator used to power up pcie phy | Date | Mon, 29 Mar 2021 16:06:03 +0800 |
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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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