linux-kernel - [PATCH 5/5] gpio: dwapb: use d->mask instead od BIT(bit)

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Message-Id: <1396865589-9972-6-git-send-email-bigeasy@linutronix.de>
Date:	Mon,  7 Apr 2014 12:13:09 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	jamie@...ieiles.com
Cc:	atull@...era.com, gnurou@...il.com, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org, dinguyen@...era.com,
	linus.walleij@...aro.org, sebastian.hesselbarth@...il.com,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH 5/5] gpio: dwapb: use d->mask instead od BIT(bit)

d->mask contains exact the same information as BIT(bit) so we could save
a few cycles here.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 drivers/gpio/gpio-dwapb.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 13f1ad0..d85fc2e 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -113,7 +113,7 @@ static void dwapb_irq_enable(struct irq_data *d)
 
 	irq_gc_lock(igc);
 	val = readl(gpio->regs + GPIO_INTEN);
-	val |= BIT(d->hwirq);
+	val |= d->mask;
 	writel(val, gpio->regs + GPIO_INTEN);
 	irq_gc_unlock(igc);
 }
@@ -126,7 +126,7 @@ static void dwapb_irq_disable(struct irq_data *d)
 
 	irq_gc_lock(igc);
 	val = readl(gpio->regs + GPIO_INTEN);
-	val &= ~BIT(d->hwirq);
+	val &= ~d->mask;
 	writel(val, gpio->regs + GPIO_INTEN);
 	irq_gc_unlock(igc);
 }
@@ -158,7 +158,7 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
 {
 	struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
 	struct dwapb_gpio *gpio = igc->private;
-	int bit = d->hwirq;
+	u32 mask = d->mask;
 	unsigned long level, polarity;
 
 	if (type & ~(IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
@@ -171,24 +171,24 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
 
 	switch (type) {
 	case IRQ_TYPE_EDGE_BOTH:
-		level |= BIT(bit);
-		dwapb_toggle_trigger(gpio, bit);
+		level |= mask;
+		dwapb_toggle_trigger(gpio, d->hwirq);
 		break;
 	case IRQ_TYPE_EDGE_RISING:
-		level |= BIT(bit);
-		polarity |= BIT(bit);
+		level |= mask;
+		polarity |= mask;
 		break;
 	case IRQ_TYPE_EDGE_FALLING:
-		level |= BIT(bit);
-		polarity &= ~BIT(bit);
+		level |= mask;
+		polarity &= ~mask;
 		break;
 	case IRQ_TYPE_LEVEL_HIGH:
-		level &= ~BIT(bit);
-		polarity |= BIT(bit);
+		level &= ~mask;
+		polarity |= mask;
 		break;
 	case IRQ_TYPE_LEVEL_LOW:
-		level &= ~BIT(bit);
-		polarity &= ~BIT(bit);
+		level &= ~mask;
+		polarity &= ~mask;
 		break;
 	}
 
-- 
1.9.1

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