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irqchip: armada-370-xp: properly request resources 

Instead of using of_iomap(), we now use of_address_to_resource(),
request_mem_region() and ioremap(). This allows the corresponding I/O
regions to be properly requested and visible in /proc/iomem.

The main motivation for this change is that the introduction of the
MSI support requires us to get the physical address of the main
interrupt controller registers, so we will need the corresponding
'struct resource' anyway.

We also take this opportunity to change a panic() to BUG_ON(), in
order to be consistent with the rest of the driver.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Daniel Price <daniel.price@gmail.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Thomas Petazzoni 2013-08-09 22:27:10 +02:00 committed by Jason Cooper
parent 272b98c645
commit 627dfcc249
1 changed files with 16 additions and 4 deletions
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20
drivers/irqchip/irq-armada-370-xp.c
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@ -248,12 +248,25 @@ armada_370_xp_handle_irq(struct pt_regs *regs)
static int __init armada_370_xp_mpic_of_init(struct device_node *node,
struct device_node *parent)
{
struct resource main_int_res, per_cpu_int_res;
u32 control;
main_int_base = of_iomap(node, 0);
per_cpu_int_base = of_iomap(node, 1);
BUG_ON(of_address_to_resource(node, 0, &main_int_res));
BUG_ON(of_address_to_resource(node, 1, &per_cpu_int_res));
BUG_ON(!request_mem_region(main_int_res.start,
resource_size(&main_int_res),
node->full_name));
BUG_ON(!request_mem_region(per_cpu_int_res.start,
resource_size(&per_cpu_int_res),
node->full_name));
main_int_base = ioremap(main_int_res.start,
resource_size(&main_int_res));
BUG_ON(!main_int_base);
per_cpu_int_base = ioremap(per_cpu_int_res.start,
resource_size(&per_cpu_int_res));
BUG_ON(!per_cpu_int_base);
control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL);
@ -262,8 +275,7 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
irq_domain_add_linear(node, (control >> 2) & 0x3ff,
&armada_370_xp_mpic_irq_ops, NULL);
if (!armada_370_xp_mpic_domain)
panic("Unable to add Armada_370_Xp MPIC irq domain (DT)\n");
BUG_ON(!armada_370_xp_mpic_domain);
irq_set_default_host(armada_370_xp_mpic_domain);