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 <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Grant Likely <[email protected]> Cc: Sekhar Nori <[email protected]> Cc: Wolfgang Denk <[email protected]> Cc: Sergei Shtylyov <[email protected]> --- - changes for v4 - split patch in 2 patches, one for irq_domain adaption one for DT enhancement, as Nori Sekhar suggested. - add comment from Grant Likely for the DT part: remove if/else clause, not needed. Make use of DT runtime configurable - changes for v5: add comments from Sergei Shtylyov: - s/intc/cp_intc in commit subject add comments from Grant Likely: - rename compatible" prop to "ti,cp-intc" .../devicetree/bindings/arm/davinci/intc.txt | 27 ++++++++++++++++++++ arch/arm/mach-davinci/cp_intc.c | 24 ++++++++++++++++- 2 files changed, 49 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/davinci/intc.txt diff --git a/Documentation/devicetree/bindings/arm/davinci/intc.txt b/Documentation/devicetree/bindings/arm/davinci/intc.txt new file mode 100644 index 0000000..597e8a0 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/davinci/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..d1bef55 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_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; @@ -129,6 +132,15 @@ int __init __cp_intc_init(struct device_node *node) 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; @@ -206,7 +218,15 @@ int __init __cp_intc_init(struct device_node *node) return 0; } +static struct of_device_id irq_match[] __initdata = { + { .compatible = "ti,cp-intc", .data = __cp_intc_init, }, + { } +}; + void __init cp_intc_init(void) { - __cp_intc_init(NULL); + if (!of_find_compatible_node(NULL, NULL, "ti,cp-intc")) + __cp_intc_init(NULL, NULL); + else + of_irq_init(irq_match); } -- 1.7.7.6 _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
