regulator: twl: Make sure we have access to powerbus before trying to write to it

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According to the TRM, we need to enable i2c access to powerbus before
writing to it. Also, a new write to powerbus should not be attempted if
there is a pending transfer. The current code does not implement that
functionality and while there are no known problems caused by that, it is
better to follow what TRM says.

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Ivaylo Dimitrov 2016-03-26 10:28:13 +02:00 • committed by Mark Brown

parent f55532a0c0

commit 2330b05c09

1 changed files with 70 additions and 8 deletions

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drivers/regulator/twl-regulator.c

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