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[PATCH] MIPS: Alchemy: db1200: PCMCIA carddetects must not be auto-enabl

To: Linux-MIPS <>
Subject: [PATCH] MIPS: Alchemy: db1200: PCMCIA carddetects must not be auto-enabled.
From: Manuel Lauss <>
Date: Fri, 16 Apr 2010 19:04:17 +0200
Cc: Manuel Lauss <>
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Same issues as SD carddetects:  One of both is always screaming,
and the handlers take care to shut one up and enable the other.
To avoid messages about "unbalanced interrupt enable/disable" they
must not be automatically enabled when initally requested.

Signed-off-by: Manuel Lauss <>
The error it fixes doesn't show with the defconfig but I believe this is
just because of fortunate timings.

Please apply to 2.6.34-rc if still possible!

 arch/mips/alchemy/devboards/db1200/setup.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/mips/alchemy/devboards/db1200/setup.c 
index be7e92e..8876195 100644
--- a/arch/mips/alchemy/devboards/db1200/setup.c
+++ b/arch/mips/alchemy/devboards/db1200/setup.c
@@ -66,12 +66,16 @@ static int __init db1200_arch_init(void)
        set_irq_type(AU1200_GPIO7_INT, IRQF_TRIGGER_LOW);
        bcsr_init_irq(DB1200_INT_BEGIN, DB1200_INT_END, AU1200_GPIO7_INT);
-       /* do not autoenable these: CPLD has broken edge int handling,
-        * and the CD handler setup requires manual enabling to work
-        * around that.
+       /* insert/eject pairs: one of both is always screaming.  To avoid
+        * issues they must not be automatically enabled when initially
+        * requested.
        irq_to_desc(DB1200_SD0_INSERT_INT)->status |= IRQ_NOAUTOEN;
        irq_to_desc(DB1200_SD0_EJECT_INT)->status |= IRQ_NOAUTOEN;
+       irq_to_desc(DB1200_PC0_INSERT_INT)->status |= IRQ_NOAUTOEN;
+       irq_to_desc(DB1200_PC0_EJECT_INT)->status |= IRQ_NOAUTOEN;
+       irq_to_desc(DB1200_PC1_INSERT_INT)->status |= IRQ_NOAUTOEN;
+       irq_to_desc(DB1200_PC1_EJECT_INT)->status |= IRQ_NOAUTOEN;
        return 0;

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