From: Virupax Sadashivpetimath <virupax.sadashivpetim...@stericsson.com>
Make sure we clear the enable bit when the block is not used.
This will save some energy in certain hardware versions.
Signed-off-by: Virupax Sadashivpetimath
<virupax.sadashivpetim...@stericsson.com>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
---
drivers/spi/spi-pl022.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 91700bb..0a1d8ed 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -513,7 +513,12 @@ static void giveback(struct pl022 *pl022)
msg->state = NULL;
if (msg->complete)
msg->complete(msg->context);
- /* This message is completed, so let's turn off the clocks & power */
+
+ /* disable the SPI/SSP operation */
+ writew((readw(SSP_CR1(pl022->virtbase)) &
+ (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase));
+
+ /* This message is completed, so let's turn off the clock! */
clk_disable(pl022->clk);
amba_pclk_disable(pl022->adev);
amba_vcore_disable(pl022->adev);
--
1.7.3.2
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