Commit 1c6e58d8 authored Oct 21, 2015 by Javier Martinez Canillas Committed by Ulf Hansson Oct 27, 2015

mmc: pwrseq: Use highest priority for eMMC restart handler



The pwrseq_emmc driver does a eMMC card reset before a system reboot to
allow broken or limited ROM boot-loaders (that don't have an eMMC reset
logic) to be able to read the second stage from the eMMC.

But this has to be called before a system reboot handler and while most
of them use the priority 128, there are other restart handlers (such as
the syscon-reboot one) that use a higher priority. So, use the highest
priority to make sure that the eMMC hw is reset before a system reboot.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Markus Reichl <m.reichl@fivetechno.de>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

parent 6397b7f5

drivers/mmc/core/pwrseq_emmc.c

+3 −3

Original line number	Original line	Diff line number	Diff line
	@@ -84,11 +84,11 @@ struct mmc_pwrseq mmc_pwrseq_emmc_alloc(struct mmc_host host,

	/*		/*
	* register reset handler to ensure emmc reset also from		* register reset handler to ensure emmc reset also from
	* emergency_reboot(), priority 129 schedules it just before		* emergency_reboot(), priority 255 is the highest priority
	* system reboot		* so it will be executed before any system reboot handler.
	*/		*/
	pwrseq->reset_nb.notifier_call = mmc_pwrseq_emmc_reset_nb;		pwrseq->reset_nb.notifier_call = mmc_pwrseq_emmc_reset_nb;
	pwrseq->reset_nb.priority = 129;		pwrseq->reset_nb.priority = 255;
	register_restart_handler(&pwrseq->reset_nb);		register_restart_handler(&pwrseq->reset_nb);

	pwrseq->pwrseq.ops = &mmc_pwrseq_emmc_ops;		pwrseq->pwrseq.ops = &mmc_pwrseq_emmc_ops;