mmc: tmio: fix unbalanced power-on calls with clock-gating enabled
authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Thu, 6 Jun 2013 14:35:44 +0000 (16:35 +0200)
committerChris Ball <cjb@laptop.org>
Thu, 6 Jun 2013 15:48:04 +0000 (11:48 -0400)
With MMC clock gating enabled the MMC core currently calls MMC host driver's
.set_ios() method with .power_mode == MMC_POWER_ON and the clock value set
either to 0 or to the target rate. The tmio MMC driver then wrongly
translates the latter calls to card slot power-on requests, even when the
slot already was on. This patch fixes the driver to avoid needlessly
incrementing power-supplying regulator's use count.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

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