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ARM: imx: move irq_domain_add_legacy call into avic driver

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Move irq_domain_add_legacy call from imx27-dt.c into avic init function
and have the avic driver adopt irqdomain support for both DT and non-DT
boot.

Now avic init function calls irq_alloc_descs to get irq_base and adds
a lenacy irqdomain with the irq_base, so that the mapping between avic
irq and Linux irq number can be handled by irqdomain.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
This commit is contained in:
Shawn Guo 2012-06-13 10:55:46 +08:00
parent f3eac29da1
commit 544496ab5c
2 changed files with 25 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/arm/mach-imx/imx27-dt.c
View File

@ -10,7 +10,6 @@
*/
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <asm/mach/arch.h>
@ -33,22 +32,8 @@ static const struct of_dev_auxdata imx27_auxdata_lookup[] __initconst = {
{ /* sentinel */ }
};
static int __init imx27_avic_add_irq_domain(struct device_node *np,
struct device_node *interrupt_parent)
{
irq_domain_add_legacy(np, 64, 0, 0, &irq_domain_simple_ops, NULL);
return 0;
}
static const struct of_device_id imx27_irq_match[] __initconst = {
{ .compatible = "fsl,imx27-avic", .data = imx27_avic_add_irq_domain, },
{ /* sentinel */ }
};
static void __init imx27_dt_init(void)
{
of_irq_init(imx27_irq_match);
of_platform_populate(NULL, of_default_bus_match_table,
imx27_auxdata_lookup, NULL);
}

32
arch/arm/plat-mxc/avic.c
View File

@ -19,7 +19,9 @@
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/io.h>
#include <linux/of.h>
#include <mach/common.h>
#include <asm/mach/irq.h>
#include <asm/exception.h>
@ -50,15 +52,19 @@
#define AVIC_NUM_IRQS 64
void __iomem *avic_base;
static struct irq_domain *domain;
static u32 avic_saved_mask_reg[2];
#ifdef CONFIG_MXC_IRQ_PRIOR
static int avic_irq_set_priority(unsigned char irq, unsigned char prio)
{
struct irq_data *d = irq_get_irq_data(irq);
unsigned int temp;
unsigned int mask = 0x0F << irq % 8 * 4;
irq = d->hwirq;
if (irq >= AVIC_NUM_IRQS)
return -EINVAL;
@ -75,8 +81,11 @@ static int avic_irq_set_priority(unsigned char irq, unsigned char prio)
#ifdef CONFIG_FIQ
static int avic_set_irq_fiq(unsigned int irq, unsigned int type)
{
struct irq_data *d = irq_get_irq_data(irq);
unsigned int irqt;
irq = d->hwirq;
if (irq >= AVIC_NUM_IRQS)
return -EINVAL;
@ -108,7 +117,7 @@ static void avic_irq_suspend(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct irq_chip_type *ct = gc->chip_types;
int idx = gc->irq_base >> 5;
int idx = d->hwirq >> 5;
avic_saved_mask_reg[idx] = __raw_readl(avic_base + ct->regs.mask);
__raw_writel(gc->wake_active, avic_base + ct->regs.mask);
@ -118,7 +127,7 @@ static void avic_irq_resume(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct irq_chip_type *ct = gc->chip_types;
int idx = gc->irq_base >> 5;
int idx = d->hwirq >> 5;
__raw_writel(avic_saved_mask_reg[idx], avic_base + ct->regs.mask);
}
@ -128,11 +137,10 @@ static void avic_irq_resume(struct irq_data *d)
#define avic_irq_resume NULL
#endif
static __init void avic_init_gc(unsigned int irq_start)
static __init void avic_init_gc(int idx, unsigned int irq_start)
{
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
int idx = irq_start >> 5;
gc = irq_alloc_generic_chip("mxc-avic", 1, irq_start, avic_base,
handle_level_irq);
@ -161,7 +169,7 @@ asmlinkage void __exception_irq_entry avic_handle_irq(struct pt_regs *regs)
if (nivector == 0xffff)
break;
handle_IRQ(nivector, regs);
handle_IRQ(irq_find_mapping(domain, nivector), regs);
} while (1);
}
@ -172,6 +180,8 @@ asmlinkage void __exception_irq_entry avic_handle_irq(struct pt_regs *regs)
*/
void __init mxc_init_irq(void __iomem *irqbase)
{
struct device_node *np;
int irq_base;
int i;
avic_base = irqbase;
@ -190,8 +200,16 @@ void __init mxc_init_irq(void __iomem *irqbase)
__raw_writel(0, avic_base + AVIC_INTTYPEH);
__raw_writel(0, avic_base + AVIC_INTTYPEL);
for (i = 0; i < AVIC_NUM_IRQS; i += 32)
avic_init_gc(i);
irq_base = irq_alloc_descs(-1, 0, AVIC_NUM_IRQS, numa_node_id());
WARN_ON(irq_base < 0);
np = of_find_compatible_node(NULL, NULL, "fsl,avic");
domain = irq_domain_add_legacy(np, AVIC_NUM_IRQS, irq_base, 0,
&irq_domain_simple_ops, NULL);
WARN_ON(!domain);
for (i = 0; i < AVIC_NUM_IRQS / 32; i++, irq_base += 32)
avic_init_gc(i, irq_base);
/* Set default priority value (0) for all IRQ's */
for (i = 0; i < 8; i++)