summaryrefslogtreecommitdiffstats
path: root/arch/mips/include/asm/mach-rc32434
diff options
context:
space:
mode:
authorPhil Sutter <n0-1@freewrt.org>2008-11-28 20:45:10 +0100
committerRalf Baechle <ralf@linux-mips.org>2009-01-30 21:32:59 +0000
commit4aa0f4d7264bc4f54603de5db1ffcaf8912ddd23 (patch)
treeea927484cd34bbb9ac84e301e8d9ec469fe251b0 /arch/mips/include/asm/mach-rc32434
parentfb91e2cb7d3d44356bb92411d6d6b7cb51ce156c (diff)
downloadblackbird-op-linux-4aa0f4d7264bc4f54603de5db1ffcaf8912ddd23.tar.gz
blackbird-op-linux-4aa0f4d7264bc4f54603de5db1ffcaf8912ddd23.zip
MIPS: RB532: Add set_type() function to IRQ struct.
Interrupt Group 4 mapps the GPIO pins enabled as interrupt sources; add defines to make this clear when addressing them later in code. The mapped GPIOs support triggering on either level high or low. To achieve this, the set_type() function calls rb532_gpio_set_ilevel() for interrupts of the above mentioned group. As there is no way to alter the triggering characteristics of the other interrupts, accept level triggering on status high only. (This is just a guess; but as the system boots fine and interrupt-driven devices (e.g. serial console) work with no implications, it seems to be right.) To clear a GPIO mapped IRQ, the source has to be cleared (i.e., the interrupt status bit of the corresponding GPIO pin). This is done inside rb532_disable_irq(). After applying these changes I could undo most of my former "fixes" to pata-rb532-cf. Particularly all interrupt handling can be done generically via set_irq_type() as it was before. Signed-off-by: Phil Sutter <n0-1@freewrt.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/mach-rc32434')
-rw-r--r--arch/mips/include/asm/mach-rc32434/irq.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-rc32434/irq.h b/arch/mips/include/asm/mach-rc32434/irq.h
index 56738d8ec4e2..023a5b100ed0 100644
--- a/arch/mips/include/asm/mach-rc32434/irq.h
+++ b/arch/mips/include/asm/mach-rc32434/irq.h
@@ -30,4 +30,7 @@
#define ETH0_RX_OVR_IRQ (GROUP3_IRQ_BASE + 9)
#define ETH0_TX_UND_IRQ (GROUP3_IRQ_BASE + 10)
+#define GPIO_MAPPED_IRQ_BASE GROUP4_IRQ_BASE
+#define GPIO_MAPPED_IRQ_GROUP 4
+
#endif /* __ASM_RC32434_IRQ_H */
OpenPOWER on IntegriCloud