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>

1 files changed, 1 insertions, 7 deletions

diff --git a/arch/mips/jz4740/gpio.c b/arch/mips/jz4740/gpio.c
index 415d7d7e328..bbbe12ba60a 100644
--- a/arch/mips/jz4740/gpio.c
+++ b/arch/mips/jz4740/gpio.c
@@ -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);
 };