misc: rtsx: usb card reader: add OCP support

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This patch adds support for Over Current Protection (OCP) to the Realtek
USB card reader driver.

The OCP mechanism protects the hardware by detecting and handling current
overload conditions.
This implementation includes:

- Register configurations to enable OCP monitoring.
- Handling of OCP interrupt events and associated error reporting.
- Card power management changes in response to OCP triggers.

This enhancement improves the robustness of the driver when operating in
environments where electrical anomalies may occur, particularly with SD
and MS card interfaces.

Signed-off-by: Ricky Wu <ricky_wu@realtek.com>
Link: https://lore.kernel.org/r/20250812030811.2426112-1-ricky_wu@realtek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

...

This commit is contained in:

Ricky Wu 2025-08-12 11:08:11 +08:00 • committed by Ulf Hansson

parent b65e630a55

commit d2e6fb2c31

4 changed files with 52 additions and 4 deletions

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5

drivers/memstick/host/rtsx_usb_ms.c

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7

drivers/misc/cardreader/rtsx_usb.c

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33

drivers/mmc/host/rtsx_usb_sdmmc.c

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11

include/linux/rtsx_usb.h

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