[PATCH v7 7/8] arm64: dts: imx8mm-evk: Add the pcie support on imx8mm evk board

Richard Zhu
2021-12-02T08:30:51Z

Add the PCIe support on iMX8MM EVK boards.
And set the default reference clock mode.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Tim Harvey <tharvey@gateworks.com>
Tested-by: Tim Harvey <tharvey@gateworks.com>
---
arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 55 +++++++++++++++++++
1 file changed, 55 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
index e033d0257b5a..87a30daf0b3c 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
@@ -5,6 +5,7 @@

/dts-v1/;

+#include <dt-bindings/phy/phy-imx8-pcie.h>
#include <dt-bindings/usb/pd.h>
#include "imx8mm.dtsi"

@@ -30,6 +31,23 @@ status {
};
};

+ pcie0_refclk: pcie0-refclk {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <100000000>;
+ };
+
+ reg_pcie0: regulator-pcie {
+ compatible = "regulator-fixed";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pcie0_reg>;
+ regulator-name = "MPCIE_3V3";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ gpio = <&gpio1 5 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ };
+
reg_usdhc2_vmmc: regulator-usdhc2 {
compatible = "regulator-fixed";
pinctrl-names = "default";
@@ -289,6 +307,30 @@ pca6416: gpio@20 {
};
};

+&pcie_phy {
+ fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_INPUT>;
+ fsl,tx-deemph-gen1 = <0x2d>;
+ fsl,tx-deemph-gen2 = <0xf>;
+ clocks = <&pcie0_refclk>;
+ status = "okay";
+};
+
+&pcie0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pcie0>;
+ reset-gpio = <&gpio4 21 GPIO_ACTIVE_LOW>;
+ clocks = <&clk IMX8MM_CLK_PCIE1_ROOT>, <&clk IMX8MM_CLK_PCIE1_AUX>,
+ <&pcie0_refclk>;
+ clock-names = "pcie", "pcie_aux", "pcie_bus";
+ assigned-clocks = <&clk IMX8MM_CLK_PCIE1_AUX>,
+ <&clk IMX8MM_CLK_PCIE1_CTRL>;
+ assigned-clock-rates = <10000000>, <250000000>;
+ assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_50M>,
+ <&clk IMX8MM_SYS_PLL2_250M>;
+ vpcie-supply = <&reg_pcie0>;
+ status = "okay";
+};
+
&sai3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sai3>;
@@ -406,6 +448,19 @@ MX8MM_IOMUXC_I2C3_SDA_I2C3_SDA 0x400001c3
>;
};

+ pinctrl_pcie0: pcie0grp {
+ fsl,pins = <
+ MX8MM_IOMUXC_I2C4_SCL_PCIE1_CLKREQ_B 0x61
+ MX8MM_IOMUXC_SAI2_RXFS_GPIO4_IO21 0x41
+ >;
+ };
+
+ pinctrl_pcie0_reg: pcie0reggrp {
+ fsl,pins = <
+ MX8MM_IOMUXC_GPIO1_IO05_GPIO1_IO5 0x41
+ >;
+ };
+
pinctrl_pmic: pmicirqgrp {
fsl,pins = <
MX8MM_IOMUXC_GPIO1_IO03_GPIO1_IO3 0x141
--
2.25.1