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根据马达规格书:
马达接上就好,不需要修改,默认就是3伏LDO输出。
软件确认:
平台:sdm450
pmi632.dtsi
pmi632_vib: qcom,vibrator@5700 {
compatible = "qcom,qpnp-vibrator-ldo";
reg = <0x5700 0x100>;
qcom,vib-ldo-volt-uv = <3000000>;
qcom,disable-overdrive;
};
kernel/msm-4.9/drivers/leds/leds-qpnp-vibrator-ldo.c
从dtsi配置可以看出,只要ldo有3V输出,马达就会震动,电压控制的属于离心马达,还有一种pwm控制的,为线性马达。
马达类型:离心马达,线性马达
节点:sys/class/leds/vibrator
msm8953_64:/sys/class/leds/vibrator # ls -l
ls -l
total 0
-rw-rw-r-- 1 system system 4096 1970-01-01 08:00 activate
-rw-r--r-- 1 system system 4096 1970-01-01 08:00 brightness
lrwxrwxrwx 1 root root 0 2019-04-16 03:10 device -> ../../../200f000.qcom,spmi:qcom,pmi632@3:qcom,vibrator@5700
-rw-rw-r-- 1 system system 4096 1970-01-01 08:00 duration
-rw-r--r-- 1 root root 4096 2019-04-16 03:10 max_brightness
drwxr-xr-x 2 root root 0 1970-01-01 08:00 power
-rw-rw-r-- 1 system system 4096 1970-01-01 08:00 state
lrwxrwxrwx 1 root root 0 2019-04-16 03:10 subsystem -> ../../../../../../../../../class/leds
-rw-r--r-- 1 system system 4096 1970-01-01 08:00 trigger
-rw-r--r-- 1 root root 4096 1970-01-01 08:00 uevent
-rw-rw-r-- 1 root root 4096 2019-04-16 03:10 vmax_mv
msm8953_64:/sys/class/leds/vibrator #
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