This is a note to let you know that I've just added the patch titled
spi/pl022: disable port when unused
to the 3.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
spi-pl022-disable-port-when-unused.patch
and it can be found in the queue-3.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From fd316941cfee1fbd12746afea83720fb7823888a Mon Sep 17 00:00:00 2001
From: Virupax Sadashivpetimath <[email protected]>
Date: Tue, 12 Jun 2012 15:10:58 +0200
Subject: spi/pl022: disable port when unused
From: Virupax Sadashivpetimath <[email protected]>
commit fd316941cfee1fbd12746afea83720fb7823888a upstream.
Commit ffbbdd21329f3e15eeca6df2d4bc11c04d9d91c0
"spi: create a message queueing infrastructure"
Accidentally deleted the logic to disable the port
when unused leading to higher power consumption.
Fix this up.
Cc: Vinit Shenoy <[email protected]>
Signed-off-by: Virupax Sadashivpetimath
<[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/spi/spi-pl022.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -489,6 +489,11 @@ static void giveback(struct pl022 *pl022
pl022->cur_transfer = NULL;
pl022->cur_chip = NULL;
spi_finalize_current_message(pl022->master);
+
+ /* disable the SPI/SSP operation */
+ writew((readw(SSP_CR1(pl022->virtbase)) &
+ (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase));
+
}
/**
Patches currently in stable-queue which might be from
[email protected] are
queue-3.5/spi-pl022-disable-port-when-unused.patch
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