[brcm63xx] cache gpio values in gpio_set

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16330 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c b/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
index 97e3730..77636aa 100644 (file)
--- a/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
+++ b/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
@@ -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);
 }