android gpio 调试

gpio_chip gpio 端口控制芯片

gpio 端口：系统全局的gpio号

gpio口dts配置qcom,msm-ear-hac-pa = ;这里的msm_gpio是gpio chip，99是偏移量

/sys/class/gpio/ 是用户态进行gpio设置的接口

ls sys/class/gpio/

export 导入，写入gpio号

gpiochip589 gpio芯片

gpiochip621

gpiochip653

gpiochip685

gpiochip717

gpiochip749

gpiochip781

gpiochip813

gpiochip845

gpiochip877

gpiochip909

gpiochip910

gpiochip911

unexport 释放gpio

只有没有regquest_gpio的gpio口才能由用户态写入

echo “out” > gpio1010/direction

echo “1” > gpio1010/value

tinymix “EAR HAC PA”

EAR HAC PA: Off >On

设置成功

cat /sys/kernel/debug/gpio

GPIOs 589-620, platform/qcom,smp2pgpio-ssr-smp2p-1-out.17, master-kernel:

GPIOs 621-652, platform/qcom,smp2pgpio-ssr-smp2p-1-in.16, slave-kernel:

GPIOs 653-684, platform/qcom,smp2pgpio-ssr-smp2p-4-out.15, master-kernel:

GPIOs 685-716, platform/qcom,smp2pgpio-ssr-smp2p-4-in.14, slave-kernel:

GPIOs 717-748, platform/qcom,smp2pgpio-smp2p-4-out.12, smp2p:

GPIOs 749-780, platform/qcom,smp2pgpio-smp2p-4-in.10, smp2p:

GPIOs 781-812, platform/qcom,smp2pgpio-smp2p-1-out.8, smp2p:

GPIOs 813-844, platform/qcom,smp2pgpio-smp2p-1-in.6, smp2p:

GPIOs 845-876, platform/qcom,smp2pgpio-smp2p-7-out.4, smp2p:

GPIOs 877-908, platform/qcom,smp2pgpio-smp2p-7-in.2, smp2p:

GPIOs 909-909, spmi/qpnp-pin-de714600, pm8909-gpio:

GPIOs 910-910, spmi/qpnp-pin-de714400, pm8909-mpp:

//gpiochip-baseno-endnuber，busname/dev_name.lable

GPIOs 911-1023, platform/1000000.pinctrl, msm_tlmm_gpio:

gpio-915 (spk_vreg ) out lo

gpio-930 (chg-gpio ) out lo

gpio-931 (fb_st7735r ) out hi

gpio-932 (sn7326_rst ) out hi

gpio-934 (fb_st7735r ) out hi

gpio-936 (disp_rst_n ) in hi

gpio-942 (FLASH_EN ) in lo

gpio-1001 (volume_up ) in hi

gpio-1002 (camera_focus ) in hi

gpio-1005 (ClamShell_key ) in hi

gpio-1009 ([auto] ) out lo

gpio-1010 (sysfs ) out hi

gpio号 使用者，方向，值