Pinctrl （1）debug

Android下debug

1.内核配置

longan目次  ./build.sh menuconfig后选中 <M>
Allwinner BSP > Device Drivers > Pinctrl Drivers
<M> Pinctrl Support for Allwinner SoCs
        <M>   Pinctrl Debugfs Driver  
2.device目次添加ko

device/softwinner/saturn/common/system/vendor_ramdisk.modules 里pinctrl-sunxi.ko后添加 pinctrl-debugfs.ko
3.小机端调试

1. a523-pro:/ # mount -t debugfs none /sys/kernel/debug
2. a523-pro:/ # cd /sys/kernel/debug/sunxi_pinctrl/
3. a523-pro:/sys/kernel/debug/sunxi_pinctrl # ls
4. data  dev_name  dlevel  function  pinmux_list  power_source  pull  sunxi_pin  sunxi_pin_configure
5. a523-pro:/sys/kernel/debug/sunxi_pinctrl # echo PC1 > sunxi_pin
6. a523-pro:/sys/kernel/debug/sunxi_pinctrl # cat sunxi_pin_configure
7. cat: sunxi_pin_configure: Invalid argument

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 此时 cat: sunxi_pin_configure: Invalid argument
因为必要配debug的pin域

1. a523-pro:/sys/kernel/debug/sunxi_pinctrl # ls ../pinctrl/
2. 2000000.pinctrl  7022000.pinctrl  pinctrl-devices  pinctrl-handles  pinctrl-maps

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2000000.pinctrl    对应  PA~PK
7022000.pinctrl    对应  PL~PM
因此要先指定域即可查看信息

1. a523-pro:/sys/kernel/debug/sunxi_pinctrl # echo 2000000.pinctrl > dev_name
2. a523-pro:/sys/kernel/debug/sunxi_pinctrl # cat sunxi_pin_configure
3. pin[PC1] funciton: 3
4. pin[PC1] data: 0
5. pin[PC1] dlevel: 40mA
6. pin[PC1] pull up: 0x1
7. pin[PC1] pull down: 0xffffff
8. pin[PC1] pull disable: 0xffffff
9. pin[PC1] power_source: 16777215

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Linux固件下debug

1.内核配置

longan目次  ./build.sh menuconfig后选中 <*>
Allwinner BSP > Device Drivers > Pinctrl Drivers
<*> Pinctrl Support for Allwinner SoCs
        <*>   Pinctrl Debugfs Driver  
2.小机端调试

与Android固件调试一致

1. mount -t debugfs none /sys/kernel/debug
2. cd /sys/kernel/debug/sunxi_pinctrl/
3. echo 2000000.pinctrl > dev_name
4. echo PC2 > sunxi_pin
5. cat sunxi_pin_configure

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