Add device tree support for external wakeup source interrupt controller
on Exynos4.
Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
Cc: Grant Likely <grant.likely@xxxxxxxxxxxx>
Signed-off-by: Thomas Abraham <thomas.abraham@xxxxxxxxxx>
---
.../bindings/arm/samsung/wakeup-eint.txt | 14 ++++++++++++++
arch/arm/mach-exynos/cpu.c | 5 ++++-
arch/arm/mach-exynos/irq-eint.c | 9 +++++++++
3 files changed, 27 insertions(+), 1 deletions(-)
create mode 100644 Documentation/devicetree/bindings/arm/samsung/wakeup-eint.txt
diff --git a/Documentation/devicetree/bindings/arm/samsung/wakeup-eint.txt b/Documentation/devicetree/bindings/arm/samsung/wakeup-eint.txt
new file mode 100644
index 0000000..0ca5782
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/samsung/wakeup-eint.txt
@@ -0,0 +1,14 @@
+* Samsung Exynos4 External Wakeup Interrupt Source Controller
+
+Samsung Exynos4 processor supports 32 external wakeup interrupt sources. First
+16 of these interrupts are directly connected to GIC and the rest 16 of the
+interrupts are grouped together to deliver a single interrupt to GIC.
+
+Required properties:
+
+- compatible: should be "samsung,exynos4210-wakeup-eint".
+- interrupt-controller: Identifies the node as an interrupt controller.
+- interrupt-cells: Specifies the number of cells required to specify the
+ interrupt source number. The value of should be <2>. The first cell
+ represents the wakeup interrupt source number and the second cell
+ should be zero (currently unused).
diff --git a/arch/arm/mach-exynos/cpu.c b/arch/arm/mach-exynos/cpu.c
index 6d27c36..306c13c 100644
--- a/arch/arm/mach-exynos/cpu.c
+++ b/arch/arm/mach-exynos/cpu.c
@@ -245,6 +245,8 @@ static void exynos4_gic_irq_fix_base(struct irq_data *d)
#ifdef CONFIG_OF
static const struct of_device_id exynos4_dt_irq_match[] = {
{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
+ { .compatible = "samsung,exynos4210-wakeup-eint",
+ .data = exynos4_init_irq_eint, },
{},
};
#endif
@@ -278,7 +280,8 @@ void __init exynos4_init_irq(void)
* uses GIC instead of VIC.
*/
s5p_init_irq(NULL, 0);
- exynos4_init_irq_eint();
+ if (!of_have_populated_dt())
+ exynos4_init_irq_eint();
}
struct sysdev_class exynos4_sysclass = {
diff --git a/arch/arm/mach-exynos/irq-eint.c b/arch/arm/mach-exynos/irq-eint.c
index 771b156..e78fdfa 100644
--- a/arch/arm/mach-exynos/irq-eint.c
+++ b/arch/arm/mach-exynos/irq-eint.c
@@ -18,6 +18,7 @@
#include <linux/gpio.h>
#include <linux/irqdomain.h>
#include <linux/export.h>
+#include <linux/of.h>
#include <plat/pm.h>
#include <plat/cpu.h>
@@ -210,6 +211,14 @@ int __init exynos4_init_irq_eint(void)
}
domain->nr_irq = EXYNOS4_EINT_NR;
domain->ops = &irq_domain_simple_ops;
+#ifdef CONFIG_OF
+ if (of_have_populated_dt()) {
+ domain->of_node = of_find_compatible_node(NULL, NULL,
+ "samsung,exynos4210-wakeup-eint");
+ if (!domain->of_node)
+ pr_info("exynos4_init_irq_eint: of_node not found\n");
+ }
+#endif
irq_domain_add(domain);
irq_domain_for_each_irq(domain, hwirq, irq) {
--
1.6.6.rc2
--
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