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ARM: mxc: convert tzic to use generic irq chip 

The patch converts mxc tzic interrupt controller to use generic irq
chip.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Shawn Guo 2011-06-07 13:59:14 +08:00 committed by Sascha Hauer
parent 53b8ff9d37
commit 8b6c44f100
3 changed files with 32 additions and 79 deletions
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1
arch/arm/Kconfig
View File

@ -376,6 +376,7 @@ config ARCH_MXC
select ARCH_REQUIRE_GPIOLIB
select CLKDEV_LOOKUP
select CLKSRC_MMIO
select GENERIC_IRQ_CHIP
select HAVE_SCHED_CLOCK
help
Support for Freescale MXC/iMX-based family of processors

13
arch/arm/plat-mxc/irq-common.c
View File

@ -42,17 +42,16 @@ EXPORT_SYMBOL(imx_irq_set_priority);
int mxc_set_irq_fiq(unsigned int irq, unsigned int type)
{
struct mxc_irq_chip *chip;
struct irq_chip *base;
struct irq_chip_generic *gc;
int (*set_irq_fiq)(unsigned int, unsigned int);
int ret;
ret = -ENOSYS;
base = irq_get_chip(irq);
if (base) {
chip = container_of(base, struct mxc_irq_chip, base);
if (chip->set_irq_fiq)
ret = chip->set_irq_fiq(irq, type);
gc = irq_get_chip_data(irq);
if (gc && gc->private) {
set_irq_fiq = gc->private;
ret = set_irq_fiq(irq, type);
}
return ret;

97
arch/arm/plat-mxc/tzic.c
View File

@ -68,78 +68,34 @@ static int tzic_set_irq_fiq(unsigned int irq, unsigned int type)
return 0;
}
#else
#define tzic_set_irq_fiq NULL
#endif
/**
* tzic_mask_irq() - Disable interrupt source "d" in the TZIC
*
* @param d interrupt source
*/
static void tzic_mask_irq(struct irq_data *d)
static unsigned int *wakeup_intr[4];
static __init void tzic_init_gc(unsigned int irq_start)
{
int index, off;
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
int idx = irq_start >> 5;
index = d->irq >> 5;
off = d->irq & 0x1F;
__raw_writel(1 << off, tzic_base + TZIC_ENCLEAR0(index));
gc = irq_alloc_generic_chip("tzic", 1, irq_start, tzic_base,
handle_level_irq);
gc->private = tzic_set_irq_fiq;
gc->wake_enabled = IRQ_MSK(32);
wakeup_intr[idx] = &gc->wake_active;
ct = gc->chip_types;
ct->chip.irq_mask = irq_gc_mask_disable_reg;
ct->chip.irq_unmask = irq_gc_unmask_enable_reg;
ct->chip.irq_set_wake = irq_gc_set_wake;
ct->regs.disable = TZIC_ENCLEAR0(idx);
ct->regs.enable = TZIC_ENSET0(idx);
irq_setup_generic_chip(gc, IRQ_MSK(32), 0, IRQ_NOREQUEST, 0);
}
/**
* tzic_unmask_irq() - Enable interrupt source "d" in the TZIC
*
* @param d interrupt source
*/
static void tzic_unmask_irq(struct irq_data *d)
{
int index, off;
index = d->irq >> 5;
off = d->irq & 0x1F;
__raw_writel(1 << off, tzic_base + TZIC_ENSET0(index));
}
static unsigned int wakeup_intr[4];
/**
* tzic_set_wake_irq() - Set interrupt source "d" in the TZIC as a wake-up source.
*
* @param d interrupt source
* @param enable enable as wake-up if equal to non-zero
* disble as wake-up if equal to zero
*
* @return This function returns 0 on success.
*/
static int tzic_set_wake_irq(struct irq_data *d, unsigned int enable)
{
unsigned int index, off;
index = d->irq >> 5;
off = d->irq & 0x1F;
if (index > 3)
return -EINVAL;
if (enable)
wakeup_intr[index] |= (1 << off);
else
wakeup_intr[index] &= ~(1 << off);
return 0;
}
static struct mxc_irq_chip mxc_tzic_chip = {
.base = {
.name = "MXC_TZIC",
.irq_ack = tzic_mask_irq,
.irq_mask = tzic_mask_irq,
.irq_unmask = tzic_unmask_irq,
.irq_set_wake = tzic_set_wake_irq,
},
#ifdef CONFIG_FIQ
.set_irq_fiq = tzic_set_irq_fiq,
#endif
};
/*
* This function initializes the TZIC hardware and disables all the
* interrupts. It registers the interrupt enable and disable functions
@ -168,11 +124,8 @@ void __init tzic_init_irq(void __iomem *irqbase)
/* all IRQ no FIQ Warning :: No selection */
for (i = 0; i < TZIC_NUM_IRQS; i++) {
irq_set_chip_and_handler(i, &mxc_tzic_chip.base,
handle_level_irq);
set_irq_flags(i, IRQF_VALID);
}
for (i = 0; i < TZIC_NUM_IRQS; i += 32)
tzic_init_gc(i);
#ifdef CONFIG_FIQ
/* Initialize FIQ */
@ -199,7 +152,7 @@ int tzic_enable_wake(int is_idle)
for (i = 0; i < 4; i++) {
v = is_idle ? __raw_readl(tzic_base + TZIC_ENSET0(i)) :
wakeup_intr[i];
*wakeup_intr[i];
__raw_writel(v, tzic_base + TZIC_WAKEUP0(i));
}