mmc: sdhci: Ignore unexpected CARD_INT interrupts

One of our kernelCI boxes hanged at boot because a faulty eSDHC device
was triggering spurious CARD_INT interrupts for SD cards, causing CMD52
reads, which are not allowed for SD devices.  This adds a sanity check
to the interruption path, preventing that illegal command from getting
sent if the CARD_INT interruption should be disabled.

This quirk allows that particular machine to resume boot despite the
faulty hardware, instead of getting hung dealing with thousands of
mishandled interrupts.

Suggested-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Cc: <stable@vger.kernel.org>

path: root/include/dt-bindings/phy/phy-pistachio-usb.h

/*
 * Copyright (C) 2015 Google, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 */

#ifndef _DT_BINDINGS_PHY_PISTACHIO
#define _DT_BINDINGS_PHY_PISTACHIO

#define REFCLK_XO_CRYSTAL	0x0
#define REFCLK_X0_EXT_CLK	0x1
#define REFCLK_CLK_CORE		0x2

#endif /* _DT_BINDINGS_PHY_PISTACHIO */