On Tue, Dec 20, 2011 at 02:39:56PM +0100, Benoit Cousson wrote:
> Add a function to initialize the OMAP2/3 interrupt controller (INTC)
> using a device tree node.
>
> Replace some printk() with the proper pr_ macro.
>
> Signed-off-by: Benoit Cousson <b-cousson@xxxxxx>
> Cc: Tony Lindgren <tony@xxxxxxxxxxx>
> Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
Acked-by: Grant Likely <grant.likely@xxxxxxxxxxxx>
> ---
> .../devicetree/bindings/arm/omap/intc.txt | 27 ++++++++++++++++++
> arch/arm/mach-omap2/common.h | 10 ++++++
> arch/arm/mach-omap2/irq.c | 30 ++++++++++++++++++--
> 3 files changed, 64 insertions(+), 3 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/arm/omap/intc.txt
>
> diff --git a/Documentation/devicetree/bindings/arm/omap/intc.txt b/Documentation/devicetree/bindings/arm/omap/intc.txt
> new file mode 100644
> index 0000000..f2583e6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/omap/intc.txt
> @@ -0,0 +1,27 @@
> +* OMAP Interrupt Controller
> +
> +OMAP2/3 are using a TI interrupt controller that can support several
> +configurable number of interrupts.
> +
> +Main node required properties:
> +
> +- compatible : should be:
> + "ti,omap2-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,omap2-intc";
> + interrupt-controller;
> + #interrupt-cells = <1>;
> + ti,intc-size = <96>;
> + reg = <0x48200000 0x1000>;
> + };
> +
> diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h
> index 012bac7..bcfccc2 100644
> --- a/arch/arm/mach-omap2/common.h
> +++ b/arch/arm/mach-omap2/common.h
> @@ -156,6 +156,16 @@ void omap3_intc_resume_idle(void);
> void omap2_intc_handle_irq(struct pt_regs *regs);
> void omap3_intc_handle_irq(struct pt_regs *regs);
>
> +struct device_node;
> +#ifdef CONFIG_OF
> +int __init intc_of_init(struct device_node *node, struct device_node *parent);
> +#else
> +int __init intc_of_init(struct device_node *node, struct device_node *parent)
> +{
> + return 0;
> +}
> +#endif
> +
> /*
> * wfi used in low power code. Directly opcode is used instead
> * of instruction to avoid mulit-omap build break
> diff --git a/arch/arm/mach-omap2/irq.c b/arch/arm/mach-omap2/irq.c
> index 2f65dfd..f3722b1 100644
> --- a/arch/arm/mach-omap2/irq.c
> +++ b/arch/arm/mach-omap2/irq.c
> @@ -18,6 +18,8 @@
> #include <asm/exception.h>
> #include <asm/mach/irq.h>
> #include <linux/irqdomain.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
>
>
> /* selected INTC register offsets */
> @@ -180,7 +182,7 @@ static void __init omap_init_irq(u32 base, int nr_irqs)
> /* Static mapping, never released */
> bank->base_reg = ioremap(base, SZ_4K);
> if (!bank->base_reg) {
> - printk(KERN_ERR "Could not ioremap irq bank%i\n", i);
> + pr_err("Could not ioremap irq bank%i\n", i);
> continue;
> }
>
> @@ -193,8 +195,8 @@ static void __init omap_init_irq(u32 base, int nr_irqs)
> nr_banks++;
> }
>
> - printk(KERN_INFO "Total of %ld interrupts on %d active controller%s\n",
> - nr_of_irqs, nr_banks, nr_banks > 1 ? "s" : "");
> + pr_info("Total of %ld interrupts on %d active controller%s\n",
> + nr_of_irqs, nr_banks, nr_banks > 1 ? "s" : "");
> }
>
> void __init omap2_init_irq(void)
> @@ -252,6 +254,28 @@ asmlinkage void __exception_irq_entry omap2_intc_handle_irq(struct pt_regs *regs
> omap_intc_handle_irq(base_addr, regs);
> }
>
> +int __init intc_of_init(struct device_node *node, struct device_node *parent)
> +{
> + struct resource res;
> + u32 nr_irqs = 96;
> +
> + if (WARN_ON(!node))
> + return -ENODEV;
> +
> + if (of_address_to_resource(node, 0, &res)) {
> + WARN(1, "unable to get intc registers\n");
> + return -EINVAL;
> + }
> +
> + if (of_property_read_u32(node, "ti,intc-size", &nr_irqs))
> + pr_warn("unable to get intc-size, default to %d\n", nr_irqs);
> +
> + omap_init_irq(res.start, nr_irqs);
> + domain.of_node = of_node_get(node);
> +
> + return 0;
> +}
> +
> #ifdef CONFIG_ARCH_OMAP3
> static struct omap3_intc_regs intc_context[ARRAY_SIZE(irq_banks)];
>
> --
> 1.7.0.4
>
>
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