diff options
| author | Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com> | 2011-10-17 14:52:47 +0200 |
|---|---|---|
| committer | Rabin VINCENT <rabin.vincent@stericsson.com> | 2011-10-24 09:16:30 +0200 |
| commit | 189416055d18f733274f5cce720cd4ebaba541a7 (patch) | |
| tree | db178444a068cf428dec558f75c19362413b1c5c /drivers/spi | |
| parent | e6d1e0f8b1f5201ef0c6d218077744186d1dd783 (diff) | |
spi/pl022: disable the PL022 block when unused
Make sure we clear the enable bit when the block is not used.
This will save some energy in certain hardware versions.
Change-Id: I7b1fc03cdd60b56657ae58742273650d1d94a032
Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/35018
Reviewed-by: Avinash A <avinash.a@stericsson.com>
Tested-by: Avinash A <avinash.a@stericsson.com>
Reviewed-by: Rabin VINCENT <rabin.vincent@stericsson.com>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | 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 0a859db5ac0..75057a4e49a 100644 --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -512,7 +512,12 @@ 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! */ pm_runtime_put(&pl022->adev->dev); } |