Hardware pwm in user space

zhansb · Posted at 12/18/2015 08:59:44

there is no ready-made pwm in user space， need to write interface by youself, just like the backlight's.

zhansb · Posted at 12/23/2015 08:59:46

[ 1716.354256] [<c028a3f4>] (pwm_config+0x40/0x60) from [<bf036050>] (x_init+0x50/0xc0 [sysfs])
[ 1716.362695] [<bf036050>] (x_init+0x50/0xc0 [sysfs]) from [<c00086a4>] (do_one_initcall+0x34/0xc8)

make sure your pwm0 is not NULL.

zhansb · Posted at 12/25/2015 09:21:59

pwm_regulator is disabled, pwm1 can be used by yourself.
pwm2 and pwm3 can also be used, enable them in dts file as pwm1.