diff options
| author | Alexander Sverdlin <alexander.sverdlin.ext@nsn.com> | 2013-04-11 19:29:39 +0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-05-08 03:19:07 +0400 |
| commit | d41d547a419ca2d4df867a40a553abfe0c3df1d6 (patch) | |
| tree | 219b32ac02ac3d0d03d7dcade765d512821a89a8 /arch/mips/cavium-octeon | |
| parent | f560fabdf3f3fe12bd48146a6ccdf03ddf9ab12c (diff) | |
| download | linux-d41d547a419ca2d4df867a40a553abfe0c3df1d6.tar.xz | |
MIPS: octeon: Fix GPIO number in IRQ chip private data
Current GPIO chip implementation in octeon-irq is still broken, even after upstream
commit 87161ccdc61862c8b49e75c21209d7f79dc758e9 (MIPS: Octeon: Fix broken interrupt
controller code). It works for GPIO IRQs that have reset-default configuration, but
not for edge-triggered ones.
The problem is in octeon_irq_gpio_map_common(), which passes modified "hw" variable
(which has range of possible values 16..31) as "gpio_line" parameter to
octeon_irq_set_ciu_mapping(), which saves it in private data of the IRQ chip. Later,
neither octeon_irq_gpio_setup() is able to re-configure GPIOs (cvmx_write_csr() is
writing to non-existent CVMX_GPIO_BIT_CFGX), nor octeon_irq_ciu_gpio_ack() is able
to acknowledge such IRQ, because "mask" is incorrect.
Fix is trivial and has been tested on Cavium Octeon II -based board, including
both level-triggered and edge-triggered GPIO IRQs.
Signed-off-by: Alexander Sverdlin <alexander.sverdlin.ext@nsn.com>
Cc: David Daney <david.daney@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Patchwork: http://patchwork.linux-mips.org/patch/4980/
Acked-by: John Crispin <blogic@openwrt.org>
Diffstat (limited to 'arch/mips/cavium-octeon')
| -rw-r--r-- | arch/mips/cavium-octeon/octeon-irq.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c index 156aa6143e11..a22f06a6f7ca 100644 --- a/arch/mips/cavium-octeon/octeon-irq.c +++ b/arch/mips/cavium-octeon/octeon-irq.c @@ -1032,9 +1032,8 @@ static int octeon_irq_gpio_map_common(struct irq_domain *d, if (!octeon_irq_virq_in_range(virq)) return -EINVAL; - hw += gpiod->base_hwirq; - line = hw >> 6; - bit = hw & 63; + line = (hw + gpiod->base_hwirq) >> 6; + bit = (hw + gpiod->base_hwirq) & 63; if (line > line_limit || octeon_irq_ciu_to_irq[line][bit] != 0) return -EINVAL; |