Add device tree support for gpio 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 | 37 +++++++++++++++++
arch/arm/mach-exynos/common.c | 43 +++++++++++++------
2 files changed, 66 insertions(+), 14 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..ac9db41
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/samsung/wakeup-eint.txt
@@ -0,0 +1,37 @@
+* Samsung Exynos4 GPIO 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).
+- interrupts: List of interrupts generated by the gpio wakeup interrupt
+ controller which are connected to a parent interrupt controller. The
+ format of the interrupt specifier depends on the interrupt parent
+ controller.
+
+Optional properties:
+- interrupt-parent: phandle of the parent interrupt controller, required if
+ not inheriting the interrupt parent from the parent node.
+
+Example:
+
+ The following example is from the Exynos4210 dtsi file.
+
+ wakeup_eint: interrupt-controller-wakeup-eint {
+ compatible = "samsung,exynos4210-wakeup-eint";
+ #interrupt-cells = <2>;
+ interrupt-controller;
+ interrupts = <0 16 0>, <0 17 0>, <0 18 0>, <0 19 0>,
+ <0 20 0>, <0 21 0>, <0 22 0>, <0 23 0>,
+ <0 24 0>, <0 25 0>, <0 26 0>, <0 27 0>,
+ <0 28 0>, <0 29 0>, <0 30 0>, <0 31 0>,
+ <0 32 0>;
+ };
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 888e703..615168e 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -49,6 +49,9 @@
#include "common.h"
+static int exynos4_init_irq_eint(struct device_node *np,
+ struct device_node *parent);
+
static const char name_exynos4210[] = "EXYNOS4210";
static const char name_exynos4212[] = "EXYNOS4212";
static const char name_exynos4412[] = "EXYNOS4412";
@@ -81,8 +84,6 @@ static struct cpu_table cpu_ids[] __initdata = {
},
};
-static int exynos4_init_irq_eint(void);
-
/* Initial IO mappings */
static struct map_desc exynos_iodesc[] __initdata = {
@@ -461,6 +462,8 @@ static const struct of_device_id exynos4_dt_irq_match[] = {
{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
{ .compatible = "samsung,exynos4210-combiner",
.data = combiner_of_init, },
+ { .compatible = "samsung,exynos4210-wakeup-eint",
+ .data = exynos4_init_irq_eint, },
{},
};
#endif
@@ -478,8 +481,10 @@ void __init exynos4_init_irq(void)
of_irq_init(exynos4_dt_irq_match);
#endif
- if (!of_have_populated_dt())
+ if (!of_have_populated_dt()) {
combiner_init(S5P_VA_COMBINER_BASE, NULL);
+ exynos4_init_irq_eint(NULL, NULL);
+ }
/*
* The parameters of s5p_init_irq() are for VIC init.
@@ -487,7 +492,6 @@ void __init exynos4_init_irq(void)
* uses GIC instead of VIC.
*/
s5p_init_irq(NULL, 0);
- exynos4_init_irq_eint();
}
struct bus_type exynos4_subsys = {
@@ -745,9 +749,20 @@ static struct irq_domain_ops exynos4_eint_irq_domain_ops = {
.map = exynos4_eint_irq_domain_map,
};
-static int __init exynos4_init_irq_eint(void)
+static int __init exynos4_eint_to_irq(struct device_node *np, int hwirq)
+{
+#ifdef CONFIG_OF
+ return np ? irq_of_parse_and_map(np, hwirq) :
+ exynos4_irq_eint_to_gic_irq(hwirq);
+#else
+ return exynos4_irq_eint_to_gic_irq(hwirq);
+#endif
+}
+
+static int __init exynos4_init_irq_eint(struct device_node *np,
+ struct device_node *parent)
{
- int eint, irq_base;
+ int eint, irq_base, irq;
struct irq_domain *irq_domain;
irq_base = irq_alloc_descs(IRQ_EINT(0), 1, EXYNOS4_EINT_NR, 0);
@@ -757,7 +772,7 @@ static int __init exynos4_init_irq_eint(void)
"Continuing with %d as linux irq base\n", irq_base);
}
- irq_domain = irq_domain_add_legacy(NULL, EXYNOS4_EINT_NR, irq_base, 0,
+ irq_domain = irq_domain_add_legacy(np, EXYNOS4_EINT_NR, irq_base, 0,
&exynos4_eint_irq_domain_ops, NULL);
if (WARN_ON(!irq_domain)) {
pr_warning("exynos4_init_irq_eint: irq domain init failed\n");
@@ -765,16 +780,16 @@ static int __init exynos4_init_irq_eint(void)
}
eint_data.irq_domain = irq_domain;
- eint_data.gic_irq_base = exynos4_irq_eint_to_gic_irq(0);
+ eint_data.gic_irq_base = exynos4_eint_to_irq(np, 0);
for (eint = 0 ; eint <= 15 ; eint++) {
- irq_set_handler_data(exynos4_irq_eint_to_gic_irq(eint),
- &eint_data);
- irq_set_chained_handler(exynos4_irq_eint_to_gic_irq(eint),
- exynos4_irq_eint0_15);
+ irq = exynos4_eint_to_irq(np, eint);
+ irq_set_handler_data(irq, &eint_data);
+ irq_set_chained_handler(irq, exynos4_irq_eint0_15);
}
- irq_set_chained_handler(IRQ_EINT16_31, exynos4_irq_demux_eint16_31);
- irq_set_handler_data(IRQ_EINT16_31, &eint_data);
+ irq = exynos4_eint_to_irq(np, eint);
+ irq_set_chained_handler(irq, exynos4_irq_demux_eint16_31);
+ irq_set_handler_data(irq, &eint_data);
return 0;
}
--
1.6.6.rc2
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
