mmc: core: Prevent eMMC VCC supply to be cut from late init

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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.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

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Ulf Hansson 2012-05-09 16:15:26 +02:00 • committed by Chris Ball

parent 95dcc2cb6c

commit fa5501890d

1 changed files with 15 additions and 3 deletions

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drivers/mmc/core/core.c

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