ARM: sa11x0: assabet: better reset handling

Browse source

The codec reset pin is connected to several peripherals.  When the
reset is released, unfortunately the ADV7171 powers itself up rather
than remaining in power-down mode.  As we don't have a driver for
this device, we end up needlessly consuming an additional 330mW.

Not only that but we should have a way to arbitrate the reset signal.

This patch provides that facility: we program the ADV7171 to sleep
mode whenever the reset is released, and we release the reset when
any one of the three peripherals requests the reset to be released.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

...

This commit is contained in:

Russell King 2013-07-09 10:27:12 +01:00

parent 374b105797

commit 7dde0c0328

2 changed files with 137 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

135

arch/arm/mach-sa1100/assabet.c

View file

6

arch/arm/mach-sa1100/include/mach/assabet.h

View file