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cache gpio values in gpio_set

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SVN-Revision: 16330
This commit is contained in:
Florian Fainelli 2009-06-04 10:01:55 +00:00
parent 1208ffaedb
commit 9013e936ed
1 changed files with 8 additions and 5 deletions
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13
target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
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@ -18,12 +18,14 @@
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>
static u32 gpio_out_low, gpio_out_high;
static void bcm63xx_gpio_set(struct gpio_chip *chip,
unsigned gpio, int val)
{
u32 reg;
u32 mask;
u32 tmp;
u32 *v;
unsigned long flags;
if (gpio >= chip->ngpio)
@ -32,18 +34,19 @@ static void bcm63xx_gpio_set(struct gpio_chip *chip,
if (gpio < 32) {
reg = GPIO_DATA_LO_REG;
mask = 1 << gpio;
v = &gpio_out_low;
} else {
reg = GPIO_DATA_HI_REG;
mask = 1 << (gpio - 32);
v = &gpio_out_high;
}
local_irq_save(flags);
tmp = bcm_gpio_readl(reg);
if (val)
tmp |= mask;
*v |= mask;
else
tmp &= ~mask;
bcm_gpio_writel(tmp, reg);
*v &= ~mask;
bcm_gpio_writel(*v, reg);
local_irq_restore(flags);
}