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Commit 0ad2deea authored by Virupax Sadashivpetimath's avatar Virupax Sadashivpetimath Committed by Linus Walleij
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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.

Reviewed-by: default avatarViresh Kumar <viresh.kumar@st.com>
Signed-off-by: default avatarVirupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent d4b6af2e

drivers/spi/spi-pl022.c

+5 −1
Original line number Diff line number Diff line
@@ -1512,8 +1512,12 @@ static void pump_messages(struct work_struct *work) 
	/* Lock queue and check for queue work */

	spin_lock_irqsave(&pl022->queue_lock, flags);

	if (list_empty(&pl022->queue) || !pl022->running) {

		if (pl022->busy)

		if (pl022->busy) {

			/* nothing more to do - disable spi/ssp and power off */

			writew((readw(SSP_CR1(pl022->virtbase)) &

				(~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase));

			pm_runtime_put(&pl022->adev->dev);

		}

		pl022->busy = false;

		spin_unlock_irqrestore(&pl022->queue_lock, flags);

		return;