[PATCH] ARM: davinci: cp_intc: Add OF support for TI interrupt controller
From: Sekhar Nori <hidden>
Date: 2012-07-03 19:16:10
Subsystem:
arm port, open firmware and flattened device tree bindings, the rest, ti davinci machine support · Maintainers:
Russell King, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Bartosz Golaszewski
Possibly related (same subject, not in this thread)
- 2012-07-10 · Re: [PATCH] ARM: davinci: cp_intc: Add OF support for TI interrupt controller · Sekhar Nori <hidden>
- 2012-07-06 · Re: [PATCH] ARM: davinci: cp_intc: Add OF support for TI interrupt controller · Sekhar Nori <hidden>
- 2012-07-05 · Re: [PATCH] ARM: davinci: cp_intc: Add OF support for TI interrupt controller · Heiko Schocher <hidden>
From: Heiko Schocher <redacted> Add a function to initialize the Common Platform Interrupt Controller (cp_intc) from TI used on OMAP-L1x SoCs using a device tree node. Signed-off-by: Heiko Schocher <redacted> Cc: davinci-linux-open-source-VycZQUHpC/PFrsHnngEfi1aTQe2KTcn/@public.gmane.org Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Cc: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org> Cc: Sekhar Nori <redacted> Cc: Wolfgang Denk <redacted> Cc: Sergei Shtylyov <redacted> Signed-off-by: Sekhar Nori <redacted> --- .../devicetree/bindings/arm/davinci/cp-intc.txt | 27 ++++++++++++++++++++ arch/arm/mach-davinci/cp_intc.c | 16 +++++++++--- arch/arm/mach-davinci/include/mach/cp_intc.h | 1 + 3 files changed, 41 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/davinci/cp-intc.txt
diff --git a/Documentation/devicetree/bindings/arm/davinci/cp-intc.txt b/Documentation/devicetree/bindings/arm/davinci/cp-intc.txt
new file mode 100644
index 0000000..597e8a0
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/davinci/cp-intc.txt@@ -0,0 +1,27 @@ +* TI Common Platform Interrupt Controller + +Common Platform Interrupt Controller (cp_intc) is used on +OMAP-L1x SoCs and can support several configurable number +of interrupts. + +Main node required properties: + +- compatible : should be: + "ti,cp-intc" +- interrupt-controller : Identifies the node as an interrupt controller +- #interrupt-cells : Specifies the number of cells needed to encode an + interrupt source. The type shall be a <u32> and the value shall be 1. + + The cell contains the interrupt number in the range [0-128]. +- ti,intc-size: Number of interrupts handled by the interrupt controller. +- reg: physical base address and size of the intc registers map. + +Example: + + intc: interrupt-controller@1 { + compatible = "ti,cp-intc"; + interrupt-controller; + #interrupt-cells = <1>; + ti,intc-size = <101>; + reg = <0xfffee000 0x2000>; + };
diff --git a/arch/arm/mach-davinci/cp_intc.c b/arch/arm/mach-davinci/cp_intc.c
index 45d5256..006dae8 100644
--- a/arch/arm/mach-davinci/cp_intc.c
+++ b/arch/arm/mach-davinci/cp_intc.c@@ -14,6 +14,9 @@ #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> #include <mach/common.h> #include <mach/cp_intc.h>
@@ -119,7 +122,7 @@ static const struct irq_domain_ops cp_intc_host_ops = { .xlate = irq_domain_xlate_onetwocell, }; -int __init __cp_intc_init(struct device_node *node) +int __init cp_intc_of_init(struct device_node *node, struct device_node *parent) { u32 num_irq = davinci_soc_info.intc_irq_num; u8 *irq_prio = davinci_soc_info.intc_irq_prios;
@@ -128,7 +131,14 @@ int __init __cp_intc_init(struct device_node *node) int i, irq_base; davinci_intc_type = DAVINCI_INTC_TYPE_CP_INTC; - davinci_intc_base = ioremap(davinci_soc_info.intc_base, SZ_8K); + if (node) { + davinci_intc_base = of_iomap(node, 0); + if (of_property_read_u32(node, "ti,intc-size", &num_irq)) + pr_warn("unable to get intc-size, default to %d\n", + num_irq); + } else { + davinci_intc_base = ioremap(davinci_soc_info.intc_base, SZ_8K); + } if (WARN_ON(!davinci_intc_base)) return -EINVAL;
@@ -208,5 +218,5 @@ int __init __cp_intc_init(struct device_node *node) void __init cp_intc_init(void) { - __cp_intc_init(NULL); + cp_intc_of_init(NULL, NULL); }
diff --git a/arch/arm/mach-davinci/include/mach/cp_intc.h b/arch/arm/mach-davinci/include/mach/cp_intc.h
index 4e8190e..d13d8df 100644
--- a/arch/arm/mach-davinci/include/mach/cp_intc.h
+++ b/arch/arm/mach-davinci/include/mach/cp_intc.h@@ -52,5 +52,6 @@ #define CP_INTC_VECTOR_ADDR(n) (0x2000 + (n << 2)) void __init cp_intc_init(void); +int __init cp_intc_of_init(struct device_node *, struct device_node *); #endif /* __ASM_HARDWARE_CP_INTC_H */
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1.7.10.1