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ARM: OMAP: speed up gpio irq handling 

Speedup and shrink GPIO irq handling code, by using a pointer
that's available in the irq_chip structure instead of calling
the get_gpio_bank() function.  On OMAP1 this saves 44 words,
most of which were in IRQ critical path methods.  Hey, every
few instructions help.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
David Brownell 2006-12-06 17:14:10 -08:00 committed by Russell King
parent 56a2564185
commit 58781016c3
1 changed files with 9 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
arch/arm/plat-omap/gpio.c
View File

@ -584,7 +584,7 @@ static int gpio_irq_type(unsigned irq, unsigned type)
&& (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH)))
return -EINVAL;
bank = get_gpio_bank(gpio);
bank = get_irq_chip_data(irq);
spin_lock(&bank->lock);
retval = _set_gpio_triggering(bank, get_gpio_index(gpio), type);
if (retval == 0) {
@ -823,7 +823,7 @@ static int gpio_wake_enable(unsigned int irq, unsigned int enable)
if (check_gpio(gpio) < 0)
return -ENODEV;
bank = get_gpio_bank(gpio);
bank = get_irq_chip_data(irq);
retval = _set_gpio_wakeup(bank, get_gpio_index(gpio), enable);
return retval;
@ -1038,7 +1038,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
static void gpio_irq_shutdown(unsigned int irq)
{
unsigned int gpio = irq - IH_GPIO_BASE;
struct gpio_bank *bank = get_gpio_bank(gpio);
struct gpio_bank *bank = get_irq_chip_data(irq);
_reset_gpio(bank, gpio);
}
@ -1046,7 +1046,7 @@ static void gpio_irq_shutdown(unsigned int irq)
static void gpio_ack_irq(unsigned int irq)
{
unsigned int gpio = irq - IH_GPIO_BASE;
struct gpio_bank *bank = get_gpio_bank(gpio);
struct gpio_bank *bank = get_irq_chip_data(irq);
_clear_gpio_irqstatus(bank, gpio);
}
@ -1054,7 +1054,7 @@ static void gpio_ack_irq(unsigned int irq)
static void gpio_mask_irq(unsigned int irq)
{
unsigned int gpio = irq - IH_GPIO_BASE;
struct gpio_bank *bank = get_gpio_bank(gpio);
struct gpio_bank *bank = get_irq_chip_data(irq);
_set_gpio_irqenable(bank, gpio, 0);
}
@ -1063,7 +1063,7 @@ static void gpio_unmask_irq(unsigned int irq)
{
unsigned int gpio = irq - IH_GPIO_BASE;
unsigned int gpio_idx = get_gpio_index(gpio);
struct gpio_bank *bank = get_gpio_bank(gpio);
struct gpio_bank *bank = get_irq_chip_data(irq);
_set_gpio_irqenable(bank, gpio_idx, 1);
}
@ -1092,7 +1092,7 @@ static void mpuio_ack_irq(unsigned int irq)
static void mpuio_mask_irq(unsigned int irq)
{
unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
struct gpio_bank *bank = get_gpio_bank(gpio);
struct gpio_bank *bank = get_irq_chip_data(irq);
_set_gpio_irqenable(bank, gpio, 0);
}
@ -1100,7 +1100,7 @@ static void mpuio_mask_irq(unsigned int irq)
static void mpuio_unmask_irq(unsigned int irq)
{
unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
struct gpio_bank *bank = get_gpio_bank(gpio);
struct gpio_bank *bank = get_irq_chip_data(irq);
_set_gpio_irqenable(bank, gpio, 1);
}
@ -1275,6 +1275,7 @@ static int __init _omap_gpio_init(void)
#endif
for (j = bank->virtual_irq_start;
j < bank->virtual_irq_start + gpio_count; j++) {
set_irq_chip_data(j, bank);
if (bank_is_mpuio(bank))
set_irq_chip(j, &mpuio_irq_chip);
else