linux-kernel - RE: [PATCH] regulator: Rename s5m8767_convert_voltage to s5m8767_get_proper_voltage

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Message-id: <047801ccfc1b$76f07b50$64d171f0$@com>
Date:	Wed, 07 Mar 2012 13:33:37 +0900
From:	Sangbeom Kim <sbkim73@...sung.com>
To:	axel.lin@...il.com, linux-kernel@...r.kernel.org
Cc:	'Liam Girdwood' <lrg@...com>,
	'Mark Brown' <broonie@...nsource.wolfsonmicro.com>
Subject: RE: [PATCH] regulator: Rename s5m8767_convert_voltage to
 s5m8767_get_proper_voltage_sel

Hi,

> > I was confused by the function name, s5m8767_convert_voltage() converts
> what to what?
Convert means that Normal Voltage unit to 8767 internal voltage register
unit.
> BTW, I'm also confused by s5m8767_set_high and s5m8767_set_low functions.
> Both function sets the same gpios to the same state. ( by different order
)
> Maybe we need comments (or rename) for both functions.
S5M8767A can be controlled with 3 GPIO.
To control voltage with GPIO, Order is very important.
Because Voltage inversion should not be happened.
If DVFS table is like a below,
1.5Ghz  1.5V
1.0Ghz  1.0V
0.5Ghz  0.5V

If System try to change 1.0Ghz(1.0V) -> 1.5Ghz(1.5V)
Absolutely 0.5V should not be set.

Thanks,
Sangbeom.

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