From: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
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>
Cc: Wolfgang Muees <wolfgang.mues@xxxxxxxxxxxx>
Cc: Andrew Victor <avictor.za@xxxxxxxxx>
Cc: <linux-mmc@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/at91_mci.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff -puN drivers/mmc/host/at91_mci.c~mmc-at91_mci-enable-mmc_cap_sdio_irq-only-when-it-actually-works drivers/mmc/host/at91_mci.c
--- a/drivers/mmc/host/at91_mci.c~mmc-at91_mci-enable-mmc_cap_sdio_irq-only-when-it-actually-works
+++ a/drivers/mmc/host/at91_mci.c
@@ -929,7 +929,7 @@ static int __init at91_mci_probe(struct
mmc->f_min = 375000;
mmc->f_max = 25000000;
mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
- mmc->caps = MMC_CAP_SDIO_IRQ;
+ mmc->caps = 0;
mmc->max_blk_size = MCI_MAXBLKSIZE;
mmc->max_blk_count = MCI_BLKATONCE;
@@ -958,6 +958,13 @@ static int __init at91_mci_probe(struct
goto fail5;
}
+ /* Add SDIO capability when available */
+ if (cpu_is_at91sam9260() || cpu_is_at91sam9263()) {
+ /* AT91SAM9260/9263 erratum */
+ if (host->board->wire4 || !host->board->slot_b)
+ mmc->caps |= MMC_CAP_SDIO_IRQ;
+ }
+
/*
* Reserve GPIOs ... board init code makes sure these pins are set
* up as GPIOs with the right direction (input, except for vcc)
_
--
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