linux-kernel - [PATCH 3/4] MIPS: JZ4740: GPIO: Simplify IRQ demuxer

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Date:	Fri,  3 Jun 2011 03:06:50 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Ralf Baechle <ralf@...ux-mips.org>
Cc:	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
	Lars-Peter Clausen <lars@...afoo.de>
Subject: [PATCH 3/4] 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@...afoo.de>
---
 arch/mips/jz4740/gpio.c |    8 +-------
 1 files changed, 1 insertions(+), 7 deletions(-)

diff --git a/arch/mips/jz4740/gpio.c b/arch/mips/jz4740/gpio.c
index ab583b8..f3590a2 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);
 };
 
-- 
1.7.2.5

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