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MIPS: Netlogic: Add XLP PIC irqdomain 

Add a legacy irq domain for the XLP PIC interrupts. This will be used
when interrupts are assigned from the device tree. This change is required
after commit c5cdc67 "irqdomain: Remove temporary MIPS workaround code".

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Cc: Jayachandran C <jchandra@broadcom.com>
Patchwork: https://patchwork.linux-mips.org/patch/5597/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Jayachandran C 2013-07-17 10:27:26 +00:00 committed by Ralf Baechle
parent 35ac7840bc
commit 628f0650ea
3 changed files with 61 additions and 13 deletions
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68
arch/mips/netlogic/common/irq.c
View File

@ -40,6 +40,10 @@
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <asm/errno.h>
#include <asm/signal.h>
#include <asm/ptrace.h>
@ -223,17 +227,6 @@ static void nlm_init_node_irqs(int node)
nodep->irqmask = irqmask;
}
void __init arch_init_irq(void)
{
/* Initialize the irq descriptors */
nlm_init_percpu_irqs();
nlm_init_node_irqs(0);
write_c0_eimr(nlm_current_node()->irqmask);
#if defined(CONFIG_CPU_XLR)
nlm_setup_fmn_irq();
#endif
}
void nlm_smp_irq_init(int hwcpuid)
{
int node, cpu;
@ -266,3 +259,56 @@ asmlinkage void plat_irq_dispatch(void)
/* top level irq handling */
do_IRQ(nlm_irq_to_xirq(node, i));
}
#ifdef CONFIG_OF
static struct irq_domain *xlp_pic_domain;
static const struct irq_domain_ops xlp_pic_irq_domain_ops = {
.xlate = irq_domain_xlate_onetwocell,
};
static int __init xlp_of_pic_init(struct device_node *node,
struct device_node *parent)
{
const int n_picirqs = PIC_IRT_LAST_IRQ - PIC_IRQ_BASE + 1;
struct resource res;
int socid, ret;
/* we need a hack to get the PIC's SoC chip id */
ret = of_address_to_resource(node, 0, &res);
if (ret < 0) {
pr_err("PIC %s: reg property not found!\n", node->name);
return -EINVAL;
}
socid = (res.start >> 18) & 0x3;
xlp_pic_domain = irq_domain_add_legacy(node, n_picirqs,
nlm_irq_to_xirq(socid, PIC_IRQ_BASE), PIC_IRQ_BASE,
&xlp_pic_irq_domain_ops, NULL);
if (xlp_pic_domain == NULL) {
pr_err("PIC %s: Creating legacy domain failed!\n", node->name);
return -EINVAL;
}
pr_info("Node %d: IRQ domain created for PIC@%pa\n", socid,
&res.start);
return 0;
}
static struct of_device_id __initdata xlp_pic_irq_ids[] = {
{ .compatible = "netlogic,xlp-pic", .data = xlp_of_pic_init },
{},
};
#endif
void __init arch_init_irq(void)
{
/* Initialize the irq descriptors */
nlm_init_percpu_irqs();
nlm_init_node_irqs(0);
write_c0_eimr(nlm_current_node()->irqmask);
#if defined(CONFIG_CPU_XLR)
nlm_setup_fmn_irq();
#endif
#if defined(CONFIG_OF)
of_irq_init(xlp_pic_irq_ids);
#endif
}

3
arch/mips/netlogic/dts/xlp_evp.dts
View File

@ -76,10 +76,11 @@
};
};
pic: pic@4000 {
interrupt-controller;
compatible = "netlogic,xlp-pic";
#address-cells = <0>;
#interrupt-cells = <1>;
reg = <0 0x4000 0x200>;
interrupt-controller;
};
nor_flash@1,0 {

3
arch/mips/netlogic/dts/xlp_svp.dts
View File

@ -76,10 +76,11 @@
};
};
pic: pic@4000 {
interrupt-controller;
compatible = "netlogic,xlp-pic";
#address-cells = <0>;
#interrupt-cells = <1>;
reg = <0 0x4000 0x200>;
interrupt-controller;
};
nor_flash@1,0 {