regulator MAX8998/LP3974: Support DVS-GPIO.
Quoted 6 lines · Mark Brown
Quoted 4 lines · MyungJoo Ham
Quoted 2 lines · Lukasz Majewski
Is it desirable to define all four for BUCK1 and two for BUCK2 DVS voltages in platform code?
Quoted 7 lines
Quoted 2 lines
In case a system with 4 buck1 preset voltages and 2 buck2 preset voltages, it is desirable. :)
I suspect Lukasz's question is more why this would be useful; I can imagine that the main reason would be performance and in any case I don't see it hurting to have the option.
Yes, it is supposed to be faster to set GPIO pins rather than sending values thru I2C busses. And some boards require all the four BUCK1 voltages and two BUCK2 voltages; e.g., S5PC110-Universal.
MyungJoo Ham (함명주)
Mobile Software Platform Lab,
Digital Media and Communications (DMC) Business
Samsung Electronics
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Quoted 3 lines · MyungJoo Ham
Yes, it is supposed to be faster to set GPIO pins rather than sending values thru I2C busses. And some boards require all the four BUCK1 voltages and two BUCK2 voltages; e.g., S5PC110-Universal.
Obviously the expectation there would be that the automatic stuff would figure out the set of voltages that are in use and end up using the GPIOs almost all the time anyway.