移植时使用emmc的dtb设备树文件使用网络文件系统、tftp方式加载内核文件和设备树文件没有问题,这时候在网络文件系统内使用 cat /proc/mtd 不可以查看分区情况 ,
下载到nand后,系统不可以启动,显示读取内核文件失败和读取设树文件失败;
问题原因时,nand 的驱动没有开启,需要新建一个nand的设备dts文件
文件内容如下:
/*
* Copyright (C) 2016 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "imx6ull-alientek-emmc.dts"
&gpmi {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_gpmi_nand_1>;
status = "okay";
nand-on-flash-bbt;
};
&iomuxc {
imx6ull-evk-gpmi-rework {
pinctrl_gpmi_nand_1: gpmi-nand-1 {
fsl,pins = <
MX6UL_PAD_NAND_CLE__RAWNAND_CLE 0xb0b1
MX6UL_PAD_NAND_ALE__RAWNAND_ALE 0xb0b1
MX6UL_PAD_NAND_WP_B__RAWNAND_WP_B 0xb0b1
MX6UL_PAD_NAND_READY_B__RAWNAND_READY_B 0xb000
MX6UL_PAD_NAND_CE0_B__RAWNAND_CE0_B 0xb0b1
MX6UL_PAD_NAND_CE1_B__RAWNAND_CE1_B 0xb0b1
MX6UL_PAD_NAND_RE_B__RAWNAND_RE_B 0xb0b1
MX6UL_PAD_NAND_WE_B__RAWNAND_WE_B 0xb0b1
MX6UL_PAD_NAND_DATA00__RAWNAND_DATA00 0xb0b1
MX6UL_PAD_NAND_DATA01__RAWNAND_DATA01 0xb0b1
MX6UL_PAD_NAND_DATA02__RAWNAND_DATA02 0xb0b1
MX6UL_PAD_NAND_DATA03__RAWNAND_DATA03 0xb0b1
MX6UL_PAD_NAND_DATA04__RAWNAND_DATA04 0xb0b1
MX6UL_PAD_NAND_DATA05__RAWNAND_DATA05 0xb0b1
MX6UL_PAD_NAND_DATA06__RAWNAND_DATA06 0xb0b1
MX6UL_PAD_NAND_DATA07__RAWNAND_DATA07 0xb0b1
>;
};
};
};
&qspi {
status = "disabled";
};
&usdhc2 {
status = "disabled";
};
打开makefile文件: