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MLK-20099-1 ARM64: dts: use external osc as refclk on 8mm evk board 

Use the external osc as the pcie refclk on 8mm evk
rev c board.
Create another -revb.dts for the back compatible usage.
Because that internal pll is used as pcie ref clock on
the rev b board in default.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
pull/10/head
Richard Zhu 2018-10-23 16:32:34 +08:00
parent b3b9a278d0
commit 435a64d39e
3 changed files with 35 additions and 2 deletions
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3
arch/arm64/boot/dts/freescale/Makefile
View File

@ -122,7 +122,8 @@ dtb-$(CONFIG_ARCH_FSL_IMX8MM) += fsl-imx8mm-evk.dtb \
fsl-imx8mm-ddr4-val.dtb \
fsl-imx8mm-evk-rm67191.dtb \
fsl-imx8mm-evk-root.dtb \
fsl-imx8mm-evk-inmate.dtb
fsl-imx8mm-evk-inmate.dtb \
fsl-imx8mm-evk-revb.dtb
always := $(dtb-y)
subdir-y := $(dts-dirs)
clean-files := *.dtb

32
arch/arm64/boot/dts/freescale/fsl-imx8mm-evk-revb.dts 100644
View File

@ -0,0 +1,32 @@
/*
* Copyright 2018 NXP
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/dts-v1/;
#include "fsl-imx8mm-evk.dts"
/ {
model = "FSL i.MX8MM EVK RevB board";
};
/*
* External OSC is used as PCIe REFCLK on RevC board.
* Use the -revb.dts file to distiguish the different
* HW design.
*/
&pcie0{
ext_osc = <0>;
status = "okay";
};

2
arch/arm64/boot/dts/freescale/fsl-imx8mm-evk.dts
View File

@ -926,7 +926,7 @@
pinctrl-0 = <&pinctrl_pcie0>;
disable-gpio = <&gpio1 5 GPIO_ACTIVE_LOW>;
reset-gpio = <&gpio4 21 GPIO_ACTIVE_LOW>;
ext_osc = <0>;
ext_osc = <1>;
status = "okay";
};