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65 lines
2.4 KiB
Diff
65 lines
2.4 KiB
Diff
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From c8efa45217cbd780dafe12d87b61554c2e19a010 Mon Sep 17 00:00:00 2001
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From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Date: Thu, 6 Jun 2013 18:22:51 +0200
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Subject: [PATCH 074/203] irqchip: armada-370-xp: properly request resources
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Instead of using of_iomap(), we now use of_address_to_resource(),
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request_mem_region() and ioremap(). This allows the corresponding I/O
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regions to be properly requested and visible in /proc/iomem.
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The main motivation for this change is that the introduction of the
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MSI support requires us to get the physical address of the main
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interrupt controller registers, so we will need the corresponding
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'struct resource' anyway.
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We also take this opportunity to change a panic() to BUG_ON(), in
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order to be consistent with the rest of the driver.
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Tested-by: Daniel Price <daniel.price@gmail.com>
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Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
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---
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drivers/irqchip/irq-armada-370-xp.c | 20 ++++++++++++++++----
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1 file changed, 16 insertions(+), 4 deletions(-)
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--- a/drivers/irqchip/irq-armada-370-xp.c
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+++ b/drivers/irqchip/irq-armada-370-xp.c
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@@ -248,12 +248,25 @@ armada_370_xp_handle_irq(struct pt_regs
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static int __init armada_370_xp_mpic_of_init(struct device_node *node,
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struct device_node *parent)
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{
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+ struct resource main_int_res, per_cpu_int_res;
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u32 control;
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- main_int_base = of_iomap(node, 0);
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- per_cpu_int_base = of_iomap(node, 1);
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+ BUG_ON(of_address_to_resource(node, 0, &main_int_res));
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+ BUG_ON(of_address_to_resource(node, 1, &per_cpu_int_res));
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+ BUG_ON(!request_mem_region(main_int_res.start,
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+ resource_size(&main_int_res),
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+ node->full_name));
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+ BUG_ON(!request_mem_region(per_cpu_int_res.start,
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+ resource_size(&per_cpu_int_res),
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+ node->full_name));
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+
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+ main_int_base = ioremap(main_int_res.start,
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+ resource_size(&main_int_res));
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BUG_ON(!main_int_base);
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+
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+ per_cpu_int_base = ioremap(per_cpu_int_res.start,
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+ resource_size(&per_cpu_int_res));
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BUG_ON(!per_cpu_int_base);
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control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL);
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@@ -262,8 +275,7 @@ static int __init armada_370_xp_mpic_of_
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irq_domain_add_linear(node, (control >> 2) & 0x3ff,
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&armada_370_xp_mpic_irq_ops, NULL);
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- if (!armada_370_xp_mpic_domain)
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- panic("Unable to add Armada_370_Xp MPIC irq domain (DT)\n");
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+ BUG_ON(!armada_370_xp_mpic_domain);
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irq_set_default_host(armada_370_xp_mpic_domain);
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