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authorAndrew Bresticker <abrestic@chromium.org>2014-09-18 14:47:11 -0700
committerRalf Baechle <ralf@linux-mips.org>2014-11-24 07:44:52 +0100
commit079a4601768e248ba89dd08d4953e6dae607d7bd (patch)
treed1e5975f6c556a94f4a40dc14195931b61202659
parentf64e55dcbf84f107a68974a0734b3c31db97f169 (diff)
MIPS: i8259: Use IRQ domains
Create a legacy IRQ domain for the 16 i8259 interrupts. Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Reviewed-by: Qais Yousef <qais.yousef@imgtec.com> Tested-by: Qais Yousef <qais.yousef@imgtec.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Andrew Bresticker <abrestic@chromium.org> Cc: Jeffrey Deans <jeffrey.deans@imgtec.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Qais Yousef <qais.yousef@imgtec.com> Cc: Jonas Gorski <jogo@openwrt.org> Cc: John Crispin <blogic@openwrt.org> Cc: David Daney <ddaney.cavm@gmail.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7804/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/Kconfig1
-rw-r--r--arch/mips/kernel/i8259.c24
2 files changed, 20 insertions, 5 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 92033b7e275b..e08aeec7d916 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -975,6 +975,7 @@ config SYS_SUPPORTS_HOTPLUG_CPU
config I8259
bool
+ select IRQ_DOMAIN
config MIPS_BONITO64
bool
diff --git a/arch/mips/kernel/i8259.c b/arch/mips/kernel/i8259.c
index 50b364897dda..a74ec3ae557c 100644
--- a/arch/mips/kernel/i8259.c
+++ b/arch/mips/kernel/i8259.c
@@ -12,6 +12,7 @@
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/syscore_ops.h>
@@ -308,6 +309,19 @@ static struct resource pic2_io_resource = {
.flags = IORESOURCE_BUSY
};
+static int i8259A_irq_domain_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ irq_set_chip_and_handler(virq, &i8259A_chip, handle_level_irq);
+ irq_set_probe(virq);
+ return 0;
+}
+
+static struct irq_domain_ops i8259A_ops = {
+ .map = i8259A_irq_domain_map,
+ .xlate = irq_domain_xlate_onecell,
+};
+
/*
* On systems with i8259-style interrupt controllers we assume for
* driver compatibility reasons interrupts 0 - 15 to be the i8259
@@ -315,17 +329,17 @@ static struct resource pic2_io_resource = {
*/
void __init init_i8259_irqs(void)
{
- int i;
+ struct irq_domain *domain;
insert_resource(&ioport_resource, &pic1_io_resource);
insert_resource(&ioport_resource, &pic2_io_resource);
init_8259A(0);
- for (i = I8259A_IRQ_BASE; i < I8259A_IRQ_BASE + 16; i++) {
- irq_set_chip_and_handler(i, &i8259A_chip, handle_level_irq);
- irq_set_probe(i);
- }
+ domain = irq_domain_add_legacy(NULL, 16, I8259A_IRQ_BASE, 0,
+ &i8259A_ops, NULL);
+ if (!domain)
+ panic("Failed to add i8259 IRQ domain");
setup_irq(I8259A_IRQ_BASE + PIC_CASCADE_IR, &irq2);
}