Commit 961e657f authored by Heiko Schocher's avatar Heiko Schocher Committed by Sekhar Nori
Browse files

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: default avatarHeiko 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: default avatarSekhar Nori <nsekhar@ti.com>
parent ce9dcb87

Documentation/devicetree/bindings/arm/davinci/cp-intc.txt

0 → 100644
+27 −0
Original line number Diff line number Diff line 
* 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>;

	};

arch/arm/mach-davinci/cp_intc.c

+13 −3
Original line number Diff line number Diff line
@@ -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;

	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);

}

arch/arm/mach-davinci/include/mach/cp_intc.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */

CRA Git | Maintained and supported by SUSTech CRA and CCSE