tree c2c81de29e0414d871d3f33c405b5c21bba97592
parent 5ae90d8e467e625e447000cb4335c4db973b1095
author Mark Brown <broonie@linaro.org> 1374924112 +0100
committer Mark Brown <broonie@linaro.org> 1375114355 +0100

spi/tegra114: Factor runtime PM out into transfer prepare/unprepare

Currently the tegra114 driver acquires a runtime PM reference for the
duration of each transfer. This may result in the IP being powered down
between transfers which would be at best wasteful. Instead it is better
to do this in the callbacks that are generated before and after starting
a series of transfers, keeping the IP powered throughout.

Signed-off-by: Mark Brown <broonie@linaro.org>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>