[RFC] MIPS: BCM63XX: add Device Tree glue code for IRQ handling
Jonas Gorski
jonas.gorski at gmail.com
Sun Nov 11 23:50:38 EST 2012
Register IRQ domains through Device Tree for the internal and external
interrupt controllers. Register the same IRQ ranges as previously to
provide backward compatibility for non-DT drivers.
Signed-off-by: Jonas Gorski <jonas.gorski at gmail.com>
---
.../devicetree/bindings/mips/bcm63xx/epic.txt | 20 ++++++++++++
.../devicetree/bindings/mips/bcm63xx/ipic.txt | 18 +++++++++++
arch/mips/bcm63xx/dts/bcm6328.dtsi | 16 ++++++++++
arch/mips/bcm63xx/dts/bcm6338.dtsi | 16 ++++++++++
arch/mips/bcm63xx/dts/bcm6345.dtsi | 16 ++++++++++
arch/mips/bcm63xx/dts/bcm6348.dtsi | 16 ++++++++++
arch/mips/bcm63xx/dts/bcm6358.dtsi | 16 ++++++++++
arch/mips/bcm63xx/dts/bcm6368.dtsi | 16 ++++++++++
arch/mips/bcm63xx/irq.c | 32 ++++++++++++++++++++
9 files changed, 166 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mips/bcm63xx/epic.txt
create mode 100644 Documentation/devicetree/bindings/mips/bcm63xx/ipic.txt
diff --git a/Documentation/devicetree/bindings/mips/bcm63xx/epic.txt b/Documentation/devicetree/bindings/mips/bcm63xx/epic.txt
new file mode 100644
index 0000000..4fc74e8
--- /dev/null
+++ b/Documentation/devicetree/bindings/mips/bcm63xx/epic.txt
@@ -0,0 +1,20 @@
+* Broadcom BCM63XX External Interrupt Controller
+
+Properties:
+- compatible: "brcm,bcm63xx-epic"
+ Compatible with all bcm63xx SoCs.
+
+- interrupt-controller: This is an interrupt controller.
+
+- #interrupt-cells: <2>
+ This controller supports level and edge triggered interrupts. The
+ first cell is the interrupt number, the second is a 1:1 mapping to
+ the linux interrupt flags.
+
+Example:
+
+ epic: interrupt-controller at 18 {
+ compatible = "brcm,bcm63xx-epic";
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ }
diff --git a/Documentation/devicetree/bindings/mips/bcm63xx/ipic.txt b/Documentation/devicetree/bindings/mips/bcm63xx/ipic.txt
new file mode 100644
index 0000000..1cbabf90
--- /dev/null
+++ b/Documentation/devicetree/bindings/mips/bcm63xx/ipic.txt
@@ -0,0 +1,18 @@
+* BCM63XX Internal Interrupt Controller
+
+Properties:
+- compatible: "brcm,bcm63xx-ipic"
+ Compatible with all bcm63xx SoCs.
+
+- interrupt-controller: This is an interrupt controller.
+
+- #interrupt-cells: <1>
+ This controller supports only level interrupts.
+
+Example:
+
+ ipic: interrupt-controller at 20 {
+ compatible = "brcm,bcm63xx-ipic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ }
diff --git a/arch/mips/bcm63xx/dts/bcm6328.dtsi b/arch/mips/bcm63xx/dts/bcm6328.dtsi
index a0e1835..a41033a 100644
--- a/arch/mips/bcm63xx/dts/bcm6328.dtsi
+++ b/arch/mips/bcm63xx/dts/bcm6328.dtsi
@@ -26,5 +26,21 @@
#size-cells = <1>;
ranges = <0 0x10000000 0x20000>;
compatible = "simple-bus";
+
+ interrupt-parent = <&ipic>;
+
+ perf at 0 {
+ epic: interrupt-controller at 18 {
+ compatible = "brcm,bcm63xx-epic";
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ ipic: interrupt-controller at 20 {
+ compatible = "brcm,bcm63xx-ipic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+ };
};
};
diff --git a/arch/mips/bcm63xx/dts/bcm6338.dtsi b/arch/mips/bcm63xx/dts/bcm6338.dtsi
index 21772d9..8ecbc4f 100644
--- a/arch/mips/bcm63xx/dts/bcm6338.dtsi
+++ b/arch/mips/bcm63xx/dts/bcm6338.dtsi
@@ -26,5 +26,21 @@
#size-cells = <1>;
ranges = <0 0xfffe0000 0x20000>;
compatible = "simple-bus";
+
+ interrupt-parent = <&ipic>;
+
+ perf at 0 {
+ ipic: interrupt-controller at c {
+ compatible = "brcm,bcm63xx-ipic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ epic: interrupt-controller at 14 {
+ compatible = "brcm,bcm63xx-epic";
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+ };
};
};
diff --git a/arch/mips/bcm63xx/dts/bcm6345.dtsi b/arch/mips/bcm63xx/dts/bcm6345.dtsi
index f1e7153..ed17c12 100644
--- a/arch/mips/bcm63xx/dts/bcm6345.dtsi
+++ b/arch/mips/bcm63xx/dts/bcm6345.dtsi
@@ -26,5 +26,21 @@
#size-cells = <1>;
ranges = <0 0xfffe0000 0x20000>;
compatible = "simple-bus";
+
+ interrupt-parent = <&ipic>;
+
+ perf at 0 {
+ ipic: interrupt-controller at c {
+ compatible = "brcm,bcm63xx-ipic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ epic: interrupt-controller at 14 {
+ compatible = "brcm,bcm63xx-epic";
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+ };
};
};
diff --git a/arch/mips/bcm63xx/dts/bcm6348.dtsi b/arch/mips/bcm63xx/dts/bcm6348.dtsi
index 8a5a2dc..d54cf20 100644
--- a/arch/mips/bcm63xx/dts/bcm6348.dtsi
+++ b/arch/mips/bcm63xx/dts/bcm6348.dtsi
@@ -26,5 +26,21 @@
#size-cells = <1>;
ranges = <0 0xfffe0000 0x20000>;
compatible = "simple-bus";
+
+ interrupt-parent = <&ipic>;
+
+ perf at 0 {
+ ipic: interrupt-controller at c {
+ compatible = "brcm,bcm63xx-ipic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ epic: interrupt-controller at 14 {
+ compatible = "brcm,bcm63xx-epic";
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+ };
};
};
diff --git a/arch/mips/bcm63xx/dts/bcm6358.dtsi b/arch/mips/bcm63xx/dts/bcm6358.dtsi
index 1d3f20f..6ef283f 100644
--- a/arch/mips/bcm63xx/dts/bcm6358.dtsi
+++ b/arch/mips/bcm63xx/dts/bcm6358.dtsi
@@ -29,5 +29,21 @@
#size-cells = <1>;
ranges = <0 0xfffe0000 0x20000>;
compatible = "simple-bus";
+
+ interrupt-parent = <&ipic>;
+
+ perf at 0 {
+ epic: interrupt-controller at 18 {
+ compatible = "brcm,bcm63xx-epic";
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ ipic: interrupt-controller at 20 {
+ compatible = "brcm,bcm63xx-ipic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+ };
};
};
diff --git a/arch/mips/bcm63xx/dts/bcm6368.dtsi b/arch/mips/bcm63xx/dts/bcm6368.dtsi
index a7624b9..ae1b584 100644
--- a/arch/mips/bcm63xx/dts/bcm6368.dtsi
+++ b/arch/mips/bcm63xx/dts/bcm6368.dtsi
@@ -29,5 +29,21 @@
#size-cells = <1>;
ranges = <0 0x10000000 0x20000>;
compatible = "simple-bus";
+
+ interrupt-parent = <&ipic>;
+
+ perf at 0 {
+ epic: interrupt-controller at 18 {
+ compatible = "brcm,bcm63xx-epic";
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ ipic: interrupt-controller at 20 {
+ compatible = "brcm,bcm63xx-ipic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+ };
};
};
diff --git a/arch/mips/bcm63xx/irq.c b/arch/mips/bcm63xx/irq.c
index da24c2b..3b64066 100644
--- a/arch/mips/bcm63xx/irq.c
+++ b/arch/mips/bcm63xx/irq.c
@@ -12,6 +12,8 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/irq.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
#include <bcm63xx_cpu.h>
@@ -515,6 +517,34 @@ static struct irqaction cpu_ext_cascade_action = {
.flags = IRQF_NO_THREAD,
};
+static int __init bcm63xx_ipic_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ if (!irq_domain_add_simple(node,
+ IRQ_EXTERNAL_BASE - IRQ_INTERNAL_BASE,
+ IRQ_INTERNAL_BASE, &irq_domain_simple_ops,
+ NULL))
+ panic("unable to add ipic domain!\n");
+
+ return 0;
+}
+
+static int __init bcm63xx_epic_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ if (!irq_domain_add_simple(node, ext_irq_count, IRQ_EXTERNAL_BASE,
+ &irq_domain_simple_ops, NULL))
+ panic("unable to add epic domain!\n");
+
+ return 0;
+}
+
+static const struct of_device_id bcm63xx_pic_of_match[] __initconst = {
+ { .compatible = "brcm,bcm63xx-ipic", .data = bcm63xx_ipic_of_init },
+ { .compatible = "brcm,bcm63xx-epic", .data = bcm63xx_epic_of_init },
+ { },
+};
+
void __init arch_init_irq(void)
{
int i;
@@ -535,4 +565,6 @@ void __init arch_init_irq(void)
}
setup_irq(MIPS_CPU_IRQ_BASE + 2, &cpu_ip2_cascade_action);
+
+ of_irq_init(bcm63xx_pic_of_match);
}
--
1.7.2.5
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