How to enable/disable pwr_sw1 and pwr_sw1 via sysfs?

[johnnyc]

We need to enable/disable pwr_sw1 and pwr_sw1 preferably via sysfs:

vdd_usb_sw: pwr_sw1 {
    regulator-name = "vdd_usb_sw";
};
 
vdd_sd_sw: pwr_sw2 {
    regulator-name = "vdd_sd_sw";
    regulator-always-on;
    regulator-boot-on;
    regulator-active-discharge = <1>;
};

How can we achieve this?

[Olivier GALLIEN]

Hi @johnnyc​ 

Please refer to Regulator overview - stm32mpu

It's clearly state :

"The regulator framework offers a sysfs interface that can be used for monitoring. It is not possible to control a regulator via the sysfs."

Best practice is to use "consumers" mechanism of the regulator.

As soon as regulator is not used it's turn-off. ( as soon as you remove regulator-always-on policy )

I guess this could be achieve by using some dedicated kernel drivers.

If you detail further to what pwr_sw1 and pwr_sw2 are connected in your design and what you want to do. I can come back with further guidelines.

Olivier