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Subject[PATCH 2/4] CRISv32: add irq domains support
Date
Add support for IRQ domains to the CRISv32 interrupt controller.

Signed-off-by: Rabin Vincent <rabin@rab.in>
---
arch/cris/Kconfig | 1 +
arch/cris/arch-v32/kernel/irq.c | 28 +++++++++++++++++++++++++---
2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index cbbc2dc..66f71df 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -55,6 +55,7 @@ config CRIS
select ARCH_REQUIRE_GPIOLIB
select OF
select OF_EARLY_FLATTREE
+ select IRQ_DOMAIN if ETRAX_ARCH_V32

config HZ
int
diff --git a/arch/cris/arch-v32/kernel/irq.c b/arch/cris/arch-v32/kernel/irq.c
index 25437ae..bc871d2 100644
--- a/arch/cris/arch-v32/kernel/irq.c
+++ b/arch/cris/arch-v32/kernel/irq.c
@@ -10,6 +10,8 @@
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/profile.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/threads.h>
@@ -431,6 +433,19 @@ crisv32_do_multiple(struct pt_regs* regs)
irq_exit();
}

+static int crisv32_irq_map(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw_irq_num)
+{
+ irq_set_chip_and_handler(virq, &crisv32_irq_type, handle_simple_irq);
+
+ return 0;
+}
+
+static struct irq_domain_ops crisv32_irq_ops = {
+ .map = crisv32_irq_map,
+ .xlate = irq_domain_xlate_onecell,
+};
+
/*
* This is called by start_kernel. It fixes the IRQ masks and setup the
* interrupt vector table to point to bad_interrupt pointers.
@@ -441,6 +456,8 @@ init_IRQ(void)
int i;
int j;
reg_intr_vect_rw_mask vect_mask = {0};
+ struct device_node *np;
+ struct irq_domain *domain;

/* Clear all interrupts masks. */
for (i = 0; i < NBR_REGS; i++)
@@ -449,10 +466,15 @@ init_IRQ(void)
for (i = 0; i < 256; i++)
etrax_irv->v[i] = weird_irq;

- /* Point all IRQ's to bad handlers. */
+ np = of_find_compatible_node(NULL, NULL, "axis,crisv32-intc");
+ domain = irq_domain_add_legacy(np, NR_IRQS - FIRST_IRQ,
+ FIRST_IRQ, FIRST_IRQ,
+ &crisv32_irq_ops, NULL);
+ BUG_ON(!domain);
+ irq_set_default_host(domain);
+ of_node_put(np);
+
for (i = FIRST_IRQ, j = 0; j < NR_IRQS; i++, j++) {
- irq_set_chip_and_handler(j, &crisv32_irq_type,
- handle_simple_irq);
set_exception_vector(i, interrupt[j]);
}

--
2.1.4


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