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MIPS: Netlogic: XLP9XX PIC OF support

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Support for adding legacy IRQ domain for XLP9XX. The node id of the
PIC has to be calulated differently for XLP9XX.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6286/
This commit is contained in:
Jayachandran C 2013-12-21 16:52:29 +05:30 committed by Ralf Baechle
parent 3262b21ef8
commit 5fcbdf7cac
1 changed files with 31 additions and 6 deletions
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37
arch/mips/netlogic/common/irq.c
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@ -274,8 +274,6 @@ asmlinkage void plat_irq_dispatch(void)
}
#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,
};
@ -284,8 +282,9 @@ 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 irq_domain *xlp_pic_domain;
struct resource res;
int socid, ret;
int socid, ret, bus;
/* we need a hack to get the PIC's SoC chip id */
ret = of_address_to_resource(node, 0, &res);
@ -293,7 +292,34 @@ static int __init xlp_of_pic_init(struct device_node *node,
pr_err("PIC %s: reg property not found!\n", node->name);
return -EINVAL;
}
socid = (res.start >> 18) & 0x3;
if (cpu_is_xlp9xx()) {
bus = (res.start >> 20) & 0xf;
for (socid = 0; socid < NLM_NR_NODES; socid++) {
if (!nlm_node_present(socid))
continue;
if (nlm_get_node(socid)->socbus == bus)
break;
}
if (socid == NLM_NR_NODES) {
pr_err("PIC %s: Node mapping for bus %d not found!\n",
node->name, bus);
return -EINVAL;
}
} else {
socid = (res.start >> 18) & 0x3;
if (!nlm_node_present(socid)) {
pr_err("PIC %s: node %d does not exist!\n",
node->name, socid);
return -EINVAL;
}
}
if (!nlm_node_present(socid)) {
pr_err("PIC %s: node %d does not exist!\n", node->name, socid);
return -EINVAL;
}
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);
@ -301,8 +327,7 @@ static int __init xlp_of_pic_init(struct device_node *node,
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);
pr_info("Node %d: IRQ domain created for PIC@%pR\n", socid, &res);
return 0;
}