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Diffstat (limited to 'arch/arm/plat-mxc/gpio.c')
-rw-r--r--arch/arm/plat-mxc/gpio.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c
index 71437c61cfd7..57ec4a896a5d 100644
--- a/arch/arm/plat-mxc/gpio.c
+++ b/arch/arm/plat-mxc/gpio.c
@@ -214,13 +214,16 @@ static void _set_gpio_direction(struct gpio_chip *chip, unsigned offset,
struct mxc_gpio_port *port =
container_of(chip, struct mxc_gpio_port, chip);
u32 l;
+ unsigned long flags;
+ spin_lock_irqsave(&port->lock, flags);
l = __raw_readl(port->base + GPIO_GDIR);
if (dir)
l |= 1 << offset;
else
l &= ~(1 << offset);
__raw_writel(l, port->base + GPIO_GDIR);
+ spin_unlock_irqrestore(&port->lock, flags);
}
static void mxc_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
@@ -229,9 +232,12 @@ static void mxc_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
container_of(chip, struct mxc_gpio_port, chip);
void __iomem *reg = port->base + GPIO_DR;
u32 l;
+ unsigned long flags;
+ spin_lock_irqsave(&port->lock, flags);
l = (__raw_readl(reg) & (~(1 << offset))) | (value << offset);
__raw_writel(l, reg);
+ spin_unlock_irqrestore(&port->lock, flags);
}
static int mxc_gpio_get(struct gpio_chip *chip, unsigned offset)
@@ -285,6 +291,8 @@ int __init mxc_gpio_init(struct mxc_gpio_port *port, int cnt)
port[i].chip.base = i * 32;
port[i].chip.ngpio = 32;
+ spin_lock_init(&port[i].lock);
+
/* its a serious configuration bug when it fails */
BUG_ON( gpiochip_add(&port[i].chip) < 0 );
@@ -292,6 +300,12 @@ int __init mxc_gpio_init(struct mxc_gpio_port *port, int cnt)
/* setup one handler for each entry */
set_irq_chained_handler(port[i].irq, mx3_gpio_irq_handler);
set_irq_data(port[i].irq, &port[i]);
+ if (port[i].irq_high) {
+ /* setup handler for GPIO 16 to 31 */
+ set_irq_chained_handler(port[i].irq_high,
+ mx3_gpio_irq_handler);
+ set_irq_data(port[i].irq_high, &port[i]);
+ }
}
}