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ARM: davinci: cp_intc: Add OF support for TI interrupt controller
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 <hs@denx.de> Cc: davinci-linux-open-source@linux.davincidsp.com Cc: linux-arm-kernel@lists.infradead.org Cc: devicetree-discuss@lists.ozlabs.org Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Sergei Shtylyov <sshtylyov@mvista.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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27
Documentation/devicetree/bindings/arm/davinci/cp-intc.txt
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27
Documentation/devicetree/bindings/arm/davinci/cp-intc.txt
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@ -0,0 +1,27 @@
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* TI Common Platform Interrupt Controller
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Common Platform Interrupt Controller (cp_intc) is used on
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OMAP-L1x SoCs and can support several configurable number
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of interrupts.
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Main node required properties:
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- compatible : should be:
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"ti,cp-intc"
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- interrupt-controller : Identifies the node as an interrupt controller
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- #interrupt-cells : Specifies the number of cells needed to encode an
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interrupt source. The type shall be a <u32> and the value shall be 1.
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The cell contains the interrupt number in the range [0-128].
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- ti,intc-size: Number of interrupts handled by the interrupt controller.
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- reg: physical base address and size of the intc registers map.
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Example:
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intc: interrupt-controller@1 {
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compatible = "ti,cp-intc";
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interrupt-controller;
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#interrupt-cells = <1>;
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ti,intc-size = <101>;
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reg = <0xfffee000 0x2000>;
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};
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@ -14,6 +14,9 @@
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#include <linux/irq.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/irqdomain.h>
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#include <linux/io.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <mach/common.h>
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#include <mach/common.h>
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#include <mach/cp_intc.h>
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#include <mach/cp_intc.h>
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@ -119,7 +122,7 @@ static const struct irq_domain_ops cp_intc_host_ops = {
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.xlate = irq_domain_xlate_onetwocell,
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.xlate = irq_domain_xlate_onetwocell,
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};
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};
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int __init __cp_intc_init(struct device_node *node)
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int __init cp_intc_of_init(struct device_node *node, struct device_node *parent)
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{
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{
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u32 num_irq = davinci_soc_info.intc_irq_num;
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u32 num_irq = davinci_soc_info.intc_irq_num;
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u8 *irq_prio = davinci_soc_info.intc_irq_prios;
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u8 *irq_prio = davinci_soc_info.intc_irq_prios;
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@ -128,7 +131,14 @@ int __init __cp_intc_init(struct device_node *node)
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int i, irq_base;
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int i, irq_base;
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davinci_intc_type = DAVINCI_INTC_TYPE_CP_INTC;
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davinci_intc_type = DAVINCI_INTC_TYPE_CP_INTC;
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davinci_intc_base = ioremap(davinci_soc_info.intc_base, SZ_8K);
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if (node) {
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davinci_intc_base = of_iomap(node, 0);
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if (of_property_read_u32(node, "ti,intc-size", &num_irq))
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pr_warn("unable to get intc-size, default to %d\n",
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num_irq);
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} else {
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davinci_intc_base = ioremap(davinci_soc_info.intc_base, SZ_8K);
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}
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if (WARN_ON(!davinci_intc_base))
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if (WARN_ON(!davinci_intc_base))
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return -EINVAL;
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return -EINVAL;
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@ -208,5 +218,5 @@ int __init __cp_intc_init(struct device_node *node)
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void __init cp_intc_init(void)
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void __init cp_intc_init(void)
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{
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{
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__cp_intc_init(NULL);
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cp_intc_of_init(NULL, NULL);
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}
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}
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@ -52,5 +52,6 @@
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#define CP_INTC_VECTOR_ADDR(n) (0x2000 + (n << 2))
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#define CP_INTC_VECTOR_ADDR(n) (0x2000 + (n << 2))
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void __init cp_intc_init(void);
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void __init cp_intc_init(void);
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int __init cp_intc_of_init(struct device_node *, struct device_node *);
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#endif /* __ASM_HARDWARE_CP_INTC_H */
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#endif /* __ASM_HARDWARE_CP_INTC_H */
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