我最近开始使用BeagleBone Black工作,我面临一些问题,要应用设备树覆盖来修改pinmux以便使用一些gpios。我找到了很多关于设备树覆盖的教程,但我很难应用配置。我需要一些帮助。
以下是我使用的dts文件:(BBB-CAM-00A0.dts)
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black";
/* identification */
part-number = "BB-CAM";
version = "00A0";
exclusive-use =
/* the pin header uses */
"P8.07",
"P8.08",
"P8.09",
"P8.10",
"P8.11",
"P8.12",
"P8.13",
"P8.14",
"P8.15",
"P8.16",
"P8.17",
"P8.18",
"P8.19",
"P9.11",
"P9.12",
"P9.13",
"P9.14";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
pinctrl_test: pinctrl_test_0_pins {
pinctrl-single,pins = <
0x090 0x07
0x094 0x07
0x09c 0x07
0x098 0x07
0x034 0x07
0x030 0x07
0x024 0x07
0x028 0x07
0x03c 0x07
0x038 0x07
0x02c 0x07
0x08c 0x07
0x020 0x07
0x070 0x07
0x078 0x07
0x074 0x07
0x048 0x07
>;
};
};
};
fragment@1 {
target = <&ocp>;
__overlay__ {
test_helper: helper {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_test>;
};
};
};
};
我使用的所有引脚都没有使用过另一个覆盖层,所有引脚都是:
pin xx (44e10xxx): (MUX UNCLAIMED) (GPIO UNCLAIMED)
我使用:
编译dtsdtc -O dtb -o BBB-CAM-00A0.dtbo -b O -@ BBB-CAM-00A0.dts
然后:
cp BBB-CAM-00A0.dtbo /lib/firmware/
然后:
echo BBB-CAM > /sys/devices/bone_capemgr.*/slots
此时,叠加层似乎被接受了:
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BBB-CAM
但pinmux似乎没有改变:
root@beaglebone:~/Desktop# cat $PINS |grep 890
pin 36 (44e10890) 00000037 pinctrl-single
root@beaglebone:~/Desktop# cat $PINS |grep 894
pin 37 (44e10894) 00000037 pinctrl-single
root@beaglebone:~/Desktop# cat $PINS |grep 89c
pin 39 (44e1089c) 00000037 pinctrl-single
root@beaglebone:~/Desktop# cat $PINS |grep 898
pin 38 (44e10898) 00000037 pinctrl-single
root@beaglebone:~/Desktop# cat $PINS |grep 834
pin 13 (44e10834) 00000027 pinctrl-single
root@beaglebone:~/Desktop# cat $PINS |grep 830
pin 12 (44e10830) 00000027 pinctrl-single
root@beaglebone:~/Desktop# cat $PINS |grep 824
pin 9 (44e10824) 00000027 pinctrl-single
root@beaglebone:~/Desktop# cat $PINS |grep 828
pin 10 (44e10828) 00000027 pinctrl-single
root@beaglebone:~/Desktop# cat $PINS |grep 83c
pin 15 (44e1083c) 00000027 pinctrl-single
dmesg
不会返回任何相关信息。
有关信息,这是我未更改的内核:
Linux beaglebone 3.8.13 #1 SMP Wed Sep 4 09:09:32 CEST 2013 armv7l GNU/Linux
我真的不知道如何处理这个问题,有什么建议吗?
非常感谢
答案 0 :(得分:0)
确定。问题解决了,我重新安装了Angstrom