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| author |   Alexander Aring <alex.aring@gmail.com> | 2015-02-27 09:58:30 +0100 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2015-02-27 18:42:44 +0100 |
| commit | c91799c50a14137ecee6d60d2f1d9ab8bc895e52 (patch) | |
| tree | 8d7482f4a8b309ae8df77f1bfe41999491927cb0 /drivers/net/ieee802154 | |
| parent | at86rf230: add irq low-level for polarity (diff) | |
| download | linux-dev-c91799c50a14137ecee6d60d2f1d9ab8bc895e52.tar.xz linux-dev-c91799c50a14137ecee6d60d2f1d9ab8bc895e52.zip | |
at86rf230: add warning if edge-triggered irq
While testing I experience a deadlock while using the at86rf233 on a
raspberry pi. The reason was an edge triggered gpio irq because the irq
triggered while irq was disabled. This issue doesn't happend on a level
triggered irq because the irq will hit after calling enable_irq.
This patch adds a warning that it's not recommended to use a edge-triggered
irq type. Also change the examples to high-level irqtype.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/net/ieee802154')
| -rw-r--r-- | drivers/net/ieee802154/at86rf230.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c index c7a30ce71dcf..1d438bc54189 100644 --- a/drivers/net/ieee802154/at86rf230.c +++ b/drivers/net/ieee802154/at86rf230.c @@ -1321,6 +1321,10 @@ static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim) return rc; irq_type = irq_get_trigger_type(lp->spi->irq); + if (irq_type == IRQ_TYPE_EDGE_RISING || + irq_type == IRQ_TYPE_EDGE_FALLING) + dev_warn(&lp->spi->dev, + "Using edge triggered irq's are not recommended!\n"); if (irq_type == IRQ_TYPE_EDGE_FALLING || irq_type == IRQ_TYPE_LEVEL_LOW) irq_pol = IRQ_ACTIVE_LOW; |