diff options
Diffstat (limited to 'arch/arm/plat-mxc/gpio.c')
| -rw-r--r-- | arch/arm/plat-mxc/gpio.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c index 71437c61cfd..57ec4a896a5 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]); + } } } |