From: Greg KH <gre...@linuxfoundation.org>
3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Virupax Sadashivpetimath <virupax.sadashivpetim...@stericsson.com>
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 <vinit.she...@st.com>
Signed-off-by: Virupax Sadashivpetimath
<virupax.sadashivpetim...@stericsson.com>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
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));
+
}
/**
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