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1.首先配置管脚功能，可以在设备树配置，（可以参考一下代码）如下：
vim arch/arm/boot/dts/imx6qdl-sabreauto.dtsi
pinctrl_weim_cs0: weimcs0grp {
fsl,pins = <
MX6QDL_PAD_EIM_CS0__EIM_CS0_B 0xb0b1
>;
};
pinctrl_weim_nor: weimnorgrp {
fsl,pins = <
MX6QDL_PAD_EIM_OE__EIM_OE_B 0xb0b1
MX6QDL_PAD_EIM_RW__EIM_RW 0xb0b1
MX6QDL_PAD_EIM_WAIT__EIM_WAIT_B 0xb060
MX6QDL_PAD_EIM_D16__EIM_DATA16 0x1b0b0
MX6QDL_PAD_EIM_D17__EIM_DATA17 0x1b0b0
MX6QDL_PAD_EIM_D18__EIM_DATA18 0x1b0b0
MX6QDL_PAD_EIM_D19__EIM_DATA19 0x1b0b0
MX6QDL_PAD_EIM_D20__EIM_DATA20 0x1b0b0
MX6QDL_PAD_EIM_D21__EIM_DATA21 0x1b0b0
MX6QDL_PAD_EIM_D22__EIM_DATA22 0x1b0b0
MX6QDL_PAD_EIM_D23__EIM_DATA23 0x1b0b0
MX6QDL_PAD_EIM_D24__EIM_DATA24 0x1b0b0
MX6QDL_PAD_EIM_D25__EIM_DATA25 0x1b0b0
MX6QDL_PAD_EIM_D26__EIM_DATA26 0x1b0b0
MX6QDL_PAD_EIM_D27__EIM_DATA27 0x1b0b0
MX6QDL_PAD_EIM_D28__EIM_DATA28 0x1b0b0
MX6QDL_PAD_EIM_D29__EIM_DATA29 0x1b0b0
MX6QDL_PAD_EIM_D30__EIM_DATA30 0x1b0b0
MX6QDL_PAD_EIM_D31__EIM_DATA31 0x1b0b0
MX6QDL_PAD_EIM_A23__EIM_ADDR23 0xb0b1
MX6QDL_PAD_EIM_A22__EIM_ADDR22 0xb0b1
MX6QDL_PAD_EIM_A21__EIM_ADDR21 0xb0b1
MX6QDL_PAD_EIM_A20__EIM_ADDR20 0xb0b1
MX6QDL_PAD_EIM_A19__EIM_ADDR19 0xb0b1
MX6QDL_PAD_EIM_A18__EIM_ADDR18 0xb0b1
MX6QDL_PAD_EIM_A17__EIM_ADDR17 0xb0b1
MX6QDL_PAD_EIM_A16__EIM_ADDR16 0xb0b1
MX6QDL_PAD_EIM_DA15__EIM_AD15 0xb0b1
MX6QDL_PAD_EIM_DA14__EIM_AD14 0xb0b1
MX6QDL_PAD_EIM_DA13__EIM_AD13 0xb0b1
MX6QDL_PAD_EIM_DA12__EIM_AD12 0xb0b1
MX6QDL_PAD_EIM_DA11__EIM_AD11 0xb0b1
MX6QDL_PAD_EIM_DA10__EIM_AD10 0xb0b1
MX6QDL_PAD_EIM_DA9__EIM_AD09 0xb0b1
MX6QDL_PAD_EIM_DA8__EIM_AD08 0xb0b1
MX6QDL_PAD_EIM_DA7__EIM_AD07 0xb0b1
MX6QDL_PAD_EIM_DA6__EIM_AD06 0xb0b1
MX6QDL_PAD_EIM_DA5__EIM_AD05 0xb0b1
MX6QDL_PAD_EIM_DA4__EIM_AD04 0xb0b1
MX6QDL_PAD_EIM_DA3__EIM_AD03 0xb0b1
MX6QDL_PAD_EIM_DA2__EIM_AD02 0xb0b1
MX6QDL_PAD_EIM_DA1__EIM_AD01 0xb0b1
MX6QDL_PAD_EIM_DA0__EIM_AD00 0xb0b1
>;
};
&weim {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_weim_nor &pinctrl_weim_cs0>;
#address-cells = <2>;
#size-cells = <1>;
ranges = <0 0 0x08000000 0x08000000>;
status = "disabled"; /* pin conflict with SPI NOR */
nor@0,0 {
compatible = "cfi-flash";
reg = <0 0 0x02000000>;
#address-cells = <1>;
#size-cells = <1>;
bank-width = <2>;
fsl,weim-cs-timing = <0x00620081 0x00000001 0x1c022000
0x0000c000 0x1404a38e 0x00000000>;
};
};
2.驱动可参考vim drivers/mtd/maps/physmap_of.c
vim drivers/bus/imx-weim.c |
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发表于 2017-4-19 11:08:43
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发表于 2017-4-20 09:54:38
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