be SMP safe even with gpiolib

SVN-Revision: 16331

diff --git a/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c b/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
index 77636aa86c27a03ed5e3ba816d628dd9c88830a1..53e46641a3d313134d8610be67a4745a3c6031b2 100644 (file)
--- a/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
+++ b/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
@@ -18,10 +18,11 @@
 #include <bcm63xx_io.h>
 #include <bcm63xx_regs.h>
 
+static DEFINE_SPINLOCK(bcm63xx_gpio_lock);
 static u32 gpio_out_low, gpio_out_high;
 
 static void bcm63xx_gpio_set(struct gpio_chip *chip,
-                               unsigned gpio, int val)
+                            unsigned gpio, int val)
 {
        u32 reg;
        u32 mask;
@@ -41,13 +42,13 @@ static void bcm63xx_gpio_set(struct gpio_chip *chip,
                v = &gpio_out_high;
        }
 
-       local_irq_save(flags);
+       spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
        if (val)
                *v |= mask;
        else
                *v &= ~mask;
        bcm_gpio_writel(*v, reg);
-       local_irq_restore(flags);
+       spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
 }
 
 static int bcm63xx_gpio_get(struct gpio_chip *chip, unsigned gpio)
@@ -70,7 +71,7 @@ static int bcm63xx_gpio_get(struct gpio_chip *chip, unsigned gpio)
 }
 
 static int bcm63xx_gpio_set_direction(struct gpio_chip *chip,
-                                       unsigned gpio, int dir)
+                                     unsigned gpio, int dir)
 {
        u32 reg;
        u32 mask;
@@ -88,14 +89,14 @@ static int bcm63xx_gpio_set_direction(struct gpio_chip *chip,
                mask = 1 << (gpio - 32);
        }
 
-       local_irq_save(flags);
+       spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
        tmp = bcm_gpio_readl(reg);
        if (dir == GPIO_DIR_IN)
                tmp &= ~mask;
        else
                tmp |= mask;
        bcm_gpio_writel(tmp, reg);
-       local_irq_restore(flags);
+       spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
 
        return 0;
 }
@@ -106,7 +107,7 @@ static int bcm63xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
 }
 
 static int bcm63xx_gpio_direction_output(struct gpio_chip *chip,
-                                       unsigned gpio, int value)
+                                        unsigned gpio, int value)
 {
        bcm63xx_gpio_set(chip, gpio, value);
        return bcm63xx_gpio_set_direction(chip, gpio, GPIO_DIR_OUT);