diff options
Diffstat (limited to 'arch/arm/plat-mxc/gpio.c')
| -rw-r--r-- | arch/arm/plat-mxc/gpio.c | 30 |
1 files changed, 11 insertions, 19 deletions
diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c index d65ebe303b9..70b23893f09 100644 --- a/arch/arm/plat-mxc/gpio.c +++ b/arch/arm/plat-mxc/gpio.c @@ -140,16 +140,13 @@ static void mxc_flip_edge(struct mxc_gpio_port *port, u32 gpio) val = __raw_readl(reg); edge = (val >> (bit << 1)) & 3; val &= ~(0x3 << (bit << 1)); - switch (edge) { - case GPIO_INT_HIGH_LEV: + if (edge == GPIO_INT_HIGH_LEV) { edge = GPIO_INT_LOW_LEV; pr_debug("mxc: switch GPIO %d to low trigger\n", gpio); - break; - case GPIO_INT_LOW_LEV: + } else if (edge == GPIO_INT_LOW_LEV) { edge = GPIO_INT_HIGH_LEV; pr_debug("mxc: switch GPIO %d to high trigger\n", gpio); - break; - default: + } else { pr_err("mxc: invalid configuration for GPIO %d: %x\n", gpio, edge); return; @@ -157,25 +154,20 @@ static void mxc_flip_edge(struct mxc_gpio_port *port, u32 gpio) __raw_writel(val | (edge << (bit << 1)), reg); } -/* handle n interrupts in one status register */ +/* handle 32 interrupts in one status register */ static void mxc_gpio_irq_handler(struct mxc_gpio_port *port, u32 irq_stat) { - u32 gpio_irq_no; + u32 gpio_irq_no_base = port->virtual_irq_start; - gpio_irq_no = port->virtual_irq_start; - for (; irq_stat != 0; irq_stat >>= 1, gpio_irq_no++) { - u32 gpio = irq_to_gpio(gpio_irq_no); - - if ((irq_stat & 1) == 0) - continue; + while (irq_stat != 0) { + int irqoffset = fls(irq_stat) - 1; - BUG_ON(!(irq_desc[gpio_irq_no].handle_irq)); + if (port->both_edges & (1 << irqoffset)) + mxc_flip_edge(port, irqoffset); - if (port->both_edges & (1 << (gpio & 31))) - mxc_flip_edge(port, gpio); + generic_handle_irq(gpio_irq_no_base + irqoffset); - irq_desc[gpio_irq_no].handle_irq(gpio_irq_no, - &irq_desc[gpio_irq_no]); + irq_stat &= ~(1 << irqoffset); } } |