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mmc: core: Always allow the card detect uevent to be consumed

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The approach to allow userspace ~5s to consume the uevent, which is
triggered when a new card is inserted/initialized, currently requires the
mmc host to support system wakeup.

This is unnecessary limiting, especially for an mmc host that relies on a
GPIO IRQ for card detect. More precisely, the mmc host may not support
system wakeup for its corresponding struct device, while the GPIO IRQ still
could be configured as a wakeup IRQ via enable_irq_wake().

To support all various cases, let's simply drop the need for the wakeup
support. Instead let's always register a wakeup source and activate it for
all card detect IRQs by calling __pm_wakeup_event().

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20200529102341.12529-1-ulf.hansson@linaro.org
This commit is contained in:
Ulf Hansson
2020-05-29 12:23:41 +02:00
parent 11ba468877
commit b52fb259df
3 changed files with 9 additions and 5 deletions
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1
include/linux/mmc/host.h
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@@ -287,6 +287,7 @@ struct mmc_host {
#ifdef CONFIG_PM_SLEEP
struct notifier_block pm_notify;
#endif
struct wakeup_source *ws; /* Enable consume of uevents */
u32 max_current_330;
u32 max_current_300;
u32 max_current_180;