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[MIPS] txx9: Make gpio_txx9 entirely spinlock-safe 

TXx9 GPIO set/get routines are spinlock-safe.  This patch make
gpio_direction_{input,output} routines also spinlock-safe so that they
can be used during early board setup.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto 2008-07-10 01:02:08 +09:00 committed by Ralf Baechle
parent 315806cb19
commit 14476007c9
1 changed files with 6 additions and 4 deletions
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10
arch/mips/kernel/gpio_txx9.c
View File

@ -47,23 +47,25 @@ static void txx9_gpio_set(struct gpio_chip *chip, unsigned int offset,
static int txx9_gpio_dir_in(struct gpio_chip *chip, unsigned int offset)
{
spin_lock_irq(&txx9_gpio_lock);
unsigned long flags;
spin_lock_irqsave(&txx9_gpio_lock, flags);
__raw_writel(__raw_readl(&txx9_pioptr->dir) & ~(1 << offset),
&txx9_pioptr->dir);
mmiowb();
spin_unlock_irq(&txx9_gpio_lock);
spin_unlock_irqrestore(&txx9_gpio_lock, flags);
return 0;
}
static int txx9_gpio_dir_out(struct gpio_chip *chip, unsigned int offset,
int value)
{
spin_lock_irq(&txx9_gpio_lock);
unsigned long flags;
spin_lock_irqsave(&txx9_gpio_lock, flags);
txx9_gpio_set_raw(offset, value);
__raw_writel(__raw_readl(&txx9_pioptr->dir) | (1 << offset),
&txx9_pioptr->dir);
mmiowb();
spin_unlock_irq(&txx9_gpio_lock);
spin_unlock_irqrestore(&txx9_gpio_lock, flags);
return 0;
}