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MIPS: JZ4740: GPIO: Simplify IRQ demuxer 

We already know the base IRQ for a GPIO chip, so there is no need to
recalculate it in the demux handler.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Lars-Peter Clausen <lars@metafoo.de>
Patchwork: http://patchwork.linux-mips.org/patch/2432/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Lars-Peter Clausen 2011-09-24 02:29:54 +02:00 committed by Ralf Baechle
parent 83bc769200
commit fe5a8b7f06
1 changed files with 1 additions and 7 deletions
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8
arch/mips/jz4740/gpio.c
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@ -301,22 +301,16 @@ static void jz_gpio_irq_demux_handler(unsigned int irq, struct irq_desc *desc)
{
uint32_t flag;
unsigned int gpio_irq;
unsigned int gpio_bank;
struct jz_gpio_chip *chip = irq_desc_get_handler_data(desc);
gpio_bank = JZ4740_IRQ_GPIO0 - irq;
flag = readl(chip->base + JZ_REG_GPIO_FLAG);
if (!flag)
return;
gpio_irq = __fls(flag);
gpio_irq = chip->irq_base + __fls(flag);
jz_gpio_check_trigger_both(chip, irq);
gpio_irq += (gpio_bank << 5) + JZ4740_IRQ_GPIO(0);
generic_handle_irq(gpio_irq);
};