Hi,
I managed to connect the rf230 chip (using one Module from the Atmel
RZ600 Kit) to an Raspberry Pi with some success. One problem I had
with this, is that GPIO Interrupt for the rf230 must be set to
IRQ_TYPE_EDGE_RISING. Without setting the type the bcm2708 GPIO code
doesn't activate the interrupt.
My question is, where is the correct place to setup this interrupt
type? At the moment I think the right place would be the probe function
of the at86rf230 driver, since the driver has the knowledge, that the
interrupt handler should be called with the rising edge of the signal.
I added a patch below, showing how I modified the driver. Do you think,
that is the right way to do this, or should this setup go somewhere
else?
diff --git a/drivers/net/ieee802154/at86rf230.c
b/drivers/net/ieee802154/at86rf230.c
index a4a62e1..fb1a108 100644
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -31,6 +31,7 @@
#include <linux/spi/spi.h>
#include <linux/spi/at86rf230.h>
#include <linux/skbuff.h>
+#include <linux/irq.h>
#include <net/mac802154.h>
#include <net/wpan-phy.h>
@@ -892,6 +893,10 @@ static int at86rf230_probe(struct spi_device *spi)
if (rc)
goto err_gpio_dir;
+ rc = irq_set_irq_type(spi->irq, IRQ_TYPE_EDGE_RISING);
+ if (rc)
+ goto err_gpio_dir;
+
rc = request_irq(spi->irq, at86rf230_isr, IRQF_SHARED,
dev_name(&spi->dev), lp);
if (rc)
Thanks in advance,
Sascha Herrmann
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