On 10/17/2011 6:42 PM, Linus WALLEIJ wrote: > 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);
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