From: Linus Walleij <linus.wall...@linaro.org>
Right now the card detect IRQ for MMCI is requested without any
flags which will give some default machine-specified IRQ
behaviour. However on the U300 rising+falling edges (such as can
be expected from a simple GPIO to generate when inserting/removing
a card) need to be requested explicitly.
Cc: Rabin Vincent <rabin.vinc...@stericsson.com>
Cc: Ulf Hansson <ulf.hans...@stericsson.com>
Cc: Sebastian Rasmussen <sebastian.rasmus...@stericsson.com>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
---
drivers/mmc/host/mmci.c | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 4941e06..6e27433 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1128,9 +1128,17 @@ static int __devinit mmci_probe(struct amba_device *dev,
else if (ret != -ENOSYS)
goto err_gpio_cd;
+ /*
+ * A gpio pin that will detect cards when inserted and removed
+ * will most likely want to trigger on the edges if it is
+ * 0 when ejected and 1 when inserted (or mutatis mutandis
+ * for the inverted case) so we request triggers on both
+ * edges.
+ */
ret = request_any_context_irq(gpio_to_irq(plat->gpio_cd),
- mmci_cd_irq, 0,
- DRIVER_NAME " (cd)", host);
+ mmci_cd_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ DRIVER_NAME " (cd)", host);
if (ret >= 0)
host->gpio_cd_irq = gpio_to_irq(plat->gpio_cd);
}
--
1.7.3.2
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