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authorNicolas Ferre <nicolas.ferre@atmel.com>2010-03-05 13:43:43 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-06 11:26:43 -0800
commit541e7ef0399c6c5753cc8d3e8f371dcb3627e8a4 (patch)
treeaa59b87e5a72be2dffce79e85c4df2ccb58e12d7
parent9af13be2acac60ca5593e41a601d4a5b6bc35302 (diff)
downloadop-kernel-dev-541e7ef0399c6c5753cc8d3e8f371dcb3627e8a4.zip
op-kernel-dev-541e7ef0399c6c5753cc8d3e8f371dcb3627e8a4.tar.gz
mmc: at91_mci: Enable MMC_CAP_SDIO_IRQ only when it actually works.
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@atmel.com> Cc: Wolfgang Muees <wolfgang.mues@auerswald.de> Cc: Andrew Victor <avictor.za@gmail.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/mmc/host/at91_mci.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index 3cd00c6..8327dae 100644
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -929,7 +929,7 @@ static int __init at91_mci_probe(struct platform_device *pdev)
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 platform_device *pdev)
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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