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arm: orion: Use generic irq chip

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The core interrupt chip is a straight forward conversion. The gpio
chip is implemented with two instances of the irq_chip_type which can
be switched with the irq_set_type function. That allows us to use the
generic callbacks and avoids the conditionals in them.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
This commit is contained in:
Thomas Gleixner 2011-04-14 19:17:57 +02:00 • committed by Nicolas Pitre
parent cfefd21e69
commit e59347a1d1
3 changed files with 44 additions and 116 deletions
arch/arm/plat-orion
gpio.c
include/plat
gpio.h
irq.c

110
arch/arm/plat-orion/gpio.c
View file

@ -321,59 +321,16 @@ EXPORT_SYMBOL(orion_gpio_set_blink);
* polarity LEVEL mask * polarity LEVEL mask
* *
****************************************************************************/ ****************************************************************************/
static void gpio_irq_ack(struct irq_data *d)
{
struct orion_gpio_chip *ochip = irq_data_get_irq_chip_data(d);
int type = irqd_get_trigger_type(d);
if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
int pin = d->irq - ochip->secondary_irq_base;
writel(~(1 << pin), GPIO_EDGE_CAUSE(ochip));
}
}
static void gpio_irq_mask(struct irq_data *d)
{
struct orion_gpio_chip *ochip = irq_data_get_irq_chip_data(d);
int type = irqd_get_trigger_type(d);
void __iomem *reg;
int pin;
if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
reg = GPIO_EDGE_MASK(ochip);
else
reg = GPIO_LEVEL_MASK(ochip);
pin = d->irq - ochip->secondary_irq_base;
writel(readl(reg) & ~(1 << pin), reg);
}
static void gpio_irq_unmask(struct irq_data *d)
{
struct orion_gpio_chip *ochip = irq_data_get_irq_chip_data(d);
int type = irqd_get_trigger_type(d);
void __iomem *reg;
int pin;
if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
reg = GPIO_EDGE_MASK(ochip);
else
reg = GPIO_LEVEL_MASK(ochip);
pin = d->irq - ochip->secondary_irq_base;
writel(readl(reg) | (1 << pin), reg);
}
static int gpio_irq_set_type(struct irq_data *d, u32 type) static int gpio_irq_set_type(struct irq_data *d, u32 type)
{ {
struct orion_gpio_chip *ochip = irq_data_get_irq_chip_data(d); struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct irq_chip_type *ct = irq_data_get_chip_type(d);
struct orion_gpio_chip *ochip = gc->private;
int pin; int pin;
u32 u; u32 u;
pin = d->irq - ochip->secondary_irq_base; pin = d->irq - gc->irq_base;
u = readl(GPIO_IO_CONF(ochip)) & (1 << pin); u = readl(GPIO_IO_CONF(ochip)) & (1 << pin);
if (!u) { if (!u) {
@ -382,18 +339,14 @@ static int gpio_irq_set_type(struct irq_data *d, u32 type)
return -EINVAL; return -EINVAL;
} }
/* type &= IRQ_TYPE_SENSE_MASK;
* Set edge/level type. if (type == IRQ_TYPE_NONE)
*/
if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
__irq_set_handler_locked(d->irq, handle_edge_irq);
} else if (type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
__irq_set_handler_locked(d->irq, handle_level_irq);
} else {
printk(KERN_ERR "failed to set irq=%d (type=%d)\n",
d->irq, type);
return -EINVAL; return -EINVAL;
}
/* Check if we need to change chip and handler */
if (!(ct->type & type))
if (irq_setup_alt_chip(d, type))
return -EINVAL;
/* /*
* Configure interrupt polarity. * Configure interrupt polarity.
@ -425,19 +378,12 @@ static int gpio_irq_set_type(struct irq_data *d, u32 type)
return 0; return 0;
} }
struct irq_chip orion_gpio_irq_chip = {
.name = "orion_gpio_irq",
.irq_ack = gpio_irq_ack,
.irq_mask = gpio_irq_mask,
.irq_unmask = gpio_irq_unmask,
.irq_set_type = gpio_irq_set_type,
};
void __init orion_gpio_init(int gpio_base, int ngpio, void __init orion_gpio_init(int gpio_base, int ngpio,
u32 base, int mask_offset, int secondary_irq_base) u32 base, int mask_offset, int secondary_irq_base)
{ {
struct orion_gpio_chip *ochip; struct orion_gpio_chip *ochip;
int i; struct irq_chip_generic *gc;
struct irq_chip_type *ct;
if (orion_gpio_chip_count == ARRAY_SIZE(orion_gpio_chips)) if (orion_gpio_chip_count == ARRAY_SIZE(orion_gpio_chips))
return; return;
@ -471,15 +417,29 @@ void __init orion_gpio_init(int gpio_base, int ngpio,
writel(0, GPIO_EDGE_MASK(ochip)); writel(0, GPIO_EDGE_MASK(ochip));
writel(0, GPIO_LEVEL_MASK(ochip)); writel(0, GPIO_LEVEL_MASK(ochip));
for (i = 0; i < ngpio; i++) { gc = irq_alloc_generic_chip("orion_gpio_irq", 2, secondary_irq_base,
unsigned int irq = secondary_irq_base + i; ochip->base, handle_level_irq);
gc->private = ochip;
irq_set_chip_and_handler(irq, &orion_gpio_irq_chip, ct = gc->chip_types;
handle_level_irq); ct->regs.mask = ochip->mask_offset + GPIO_LEVEL_MASK_OFF;
irq_set_chip_data(irq, ochip); ct->type = IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW;
irq_set_status_flags(irq, IRQ_LEVEL); ct->chip.irq_mask = irq_gc_mask_clr_bit;
set_irq_flags(irq, IRQF_VALID); ct->chip.irq_unmask = irq_gc_mask_set_bit;
} ct->chip.irq_set_type = gpio_irq_set_type;
ct++;
ct->regs.mask = ochip->mask_offset + GPIO_EDGE_MASK_OFF;
ct->regs.ack = GPIO_EDGE_CAUSE_OFF;
ct->type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
ct->chip.irq_ack = irq_gc_ack;
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_set_type = gpio_irq_set_type;
ct->handler = handle_edge_irq;
irq_setup_generic_chip(gc, IRQ_MSK(ngpio), IRQ_GC_INIT_MASK_CACHE,
IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
} }
void orion_gpio_irq_handler(int pinoff) void orion_gpio_irq_handler(int pinoff)

1
arch/arm/plat-orion/include/plat/gpio.h
View file

@ -39,7 +39,6 @@ void __init orion_gpio_init(int gpio_base, int ngpio,
/* /*
* GPIO interrupt handling. * GPIO interrupt handling.
*/ */
extern struct irq_chip orion_gpio_irq_chip;
void orion_gpio_irq_handler(int irqoff); void orion_gpio_irq_handler(int irqoff);

49
arch/arm/plat-orion/irq.c
View file

@ -14,52 +14,21 @@
#include <linux/io.h> #include <linux/io.h>
#include <plat/irq.h> #include <plat/irq.h>
static void orion_irq_mask(struct irq_data *d)
{
void __iomem *maskaddr = irq_data_get_irq_chip_data(d);
u32 mask;
mask = readl(maskaddr);
mask &= ~(1 << (d->irq & 31));
writel(mask, maskaddr);
}
static void orion_irq_unmask(struct irq_data *d)
{
void __iomem *maskaddr = irq_data_get_irq_chip_data(d);
u32 mask;
mask = readl(maskaddr);
mask |= 1 << (d->irq & 31);
writel(mask, maskaddr);
}
static struct irq_chip orion_irq_chip = {
.name = "orion_irq",
.irq_mask = orion_irq_mask,
.irq_mask_ack = orion_irq_mask,
.irq_unmask = orion_irq_unmask,
};
void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr) void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr)
{ {
unsigned int i; struct irq_chip_generic *gc;
struct irq_chip_type *ct;
/* /*
* Mask all interrupts initially. * Mask all interrupts initially.
*/ */
writel(0, maskaddr); writel(0, maskaddr);
/* gc = irq_alloc_generic_chip("orion_irq", 1, irq_start, maskaddr,
* Register IRQ sources. handle_level_irq);
*/ ct = gc->chip_types;
for (i = 0; i < 32; i++) { ct->chip.irq_mask = irq_gc_mask_clr_bit;
unsigned int irq = irq_start + i; ct->chip.irq_unmask = irq_gc_mask_set_bit;
irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_MASK_CACHE,
irq_set_chip_and_handler(irq, &orion_irq_chip, IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
handle_level_irq);
irq_set_chip_data(irq, maskaddr);
irq_set_status_flags(irq, IRQ_LEVEL);
set_irq_flags(irq, IRQF_VALID);
}
} }