From: Oleksij Rempel <o.rempel@pengutronix.de>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Heiner Kallweit <hkallweit1@gmail.com>,
Yang Yingliang <yangyingliang@huawei.com>,
Ye Bin <yebin10@huawei.com>,
linux-mmc@vger.kernel.org, kernel@pengutronix.de
Subject: mmc: handling of Under-Voltage Events in eMMC
Date: Fri, 29 Sep 2023 15:00:28 +0200 [thread overview]
Message-ID: <20230929130028.GB2825985@pengutronix.de> (raw)
Hi,
I'm working on a project aiming to protect eMMC during power loss. Our
hardware setup includes an under-voltage detector, circuits to disable
non-critical components, and enough capacitance to allow the CPU to run
for 100ms.
I've added an interrupt handler to the fixed regulator to emit
REGULATOR_EVENT_UNDER_VOLTAGE events, and modified
drivers/mmc/host/sdhci.c to receive these events. Currently, the handler
only produces debug output.
What is the recommended approach for handling under-voltage situations?
Should the driver finish ongoing write commands, block new ones, and
shut down the eMMC? I'm looking for direction here.
Thanks,
Oleksij
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next reply other threads:[~2023-09-29 13:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-29 13:00 Oleksij Rempel [this message]
2023-10-10 14:48 ` mmc: handling of Under-Voltage Events in eMMC Ulf Hansson
2023-11-22 11:22 ` Oleksij Rempel
2023-11-22 12:26 ` Mark Brown
2023-11-30 9:06 ` Ulf Hansson
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