On Wed, May 09, 2012 at 04:15:26PM +0200, Ulf Hansson wrote: > From: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > > For eMMC cards that has been initialized from a bootloader, > the VCC voltage supply must not be cut in an uncontrolled > manner, without first sending SLEEP or POWEROFF_NOTIFY. > > The regulator_init_complete late initcall, may cut the VCC > regulator if it's reference counter is zero. To be able to > prevent the regulator from being cut, mmc_start_host, which > should execute at device init and thus before late init, > calls mmc_power_up. Then the host driver is able to increase > the reference to the regulator. This looks like a good, simple solution - working out how we avoid extra power ups will probably be more invasive and might not be worth the effort for something that's boot time only. Reviwed-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
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