Re: [PATCH 1/3] at91_mci: Enable MMC_CAP_SDIO_IRQ only when it actuallyworks

From: Nicolas Ferre
Date: Fri Jul 18 2008 - 09:30:55 EST

Pierre Ossman :
On Thu, 17 Jul 2008 11:34:07 +0200
Nicolas Ferre <nicolas.ferre@xxxxxxxxx> wrote:

According to the datasheets AT91SAM9261 does not support
SDIO interrupts, and AT91SAM9260/9263 have an erratum
requiring 4bit mode while using slot B for the interrupt
to work.

Signed-off-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>

Not all SDIO cards use 4-bit mode, so it looks to me like you have to
disable it completely (unless there's a third revision where it works
without any fine print?).

Well, I understand.

In your opinion, a printed warning that says to be sure to use only 4-bit mode SDIO cards on slot B... is not acceptable ?

It kind of disappoints me to remove this feature as the at91sam9260ek/9xe/9g20 board uses only slot B, and I really like to connect SDIO with IRQ on it.

Nicolas Ferre

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at