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gpio: mvebu: use BIT macro instead of bit shifting

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Use the BIT macro instead of explicitly shifting bits for some added
clarity.

Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Ralph Sennhauser 2017-03-17 18:44:06 +01:00 committed by Linus Walleij
parent b8c90199b5
commit d2cabc4a23
1 changed files with 17 additions and 16 deletions
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33
drivers/gpio/gpio-mvebu.c
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@ -45,6 +45,7 @@
#include <linux/clk.h>
#include <linux/pinctrl/consumer.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/bitops.h>
/*
* GPIO unit register offsets.
@ -191,9 +192,9 @@ static void mvebu_gpio_set(struct gpio_chip *chip, unsigned int pin, int value)
spin_lock_irqsave(&mvchip->lock, flags);
u = readl_relaxed(mvebu_gpioreg_out(mvchip));
if (value)
u |= 1 << pin;
u |= BIT(pin);
else
u &= ~(1 << pin);
u &= ~BIT(pin);
writel_relaxed(u, mvebu_gpioreg_out(mvchip));
spin_unlock_irqrestore(&mvchip->lock, flags);
}
@ -203,7 +204,7 @@ static int mvebu_gpio_get(struct gpio_chip *chip, unsigned int pin)
struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
u32 u;
if (readl_relaxed(mvebu_gpioreg_io_conf(mvchip)) & (1 << pin)) {
if (readl_relaxed(mvebu_gpioreg_io_conf(mvchip)) & BIT(pin)) {
u = readl_relaxed(mvebu_gpioreg_data_in(mvchip)) ^
readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
} else {
@ -223,9 +224,9 @@ static void mvebu_gpio_blink(struct gpio_chip *chip, unsigned int pin,
spin_lock_irqsave(&mvchip->lock, flags);
u = readl_relaxed(mvebu_gpioreg_blink(mvchip));
if (value)
u |= 1 << pin;
u |= BIT(pin);
else
u &= ~(1 << pin);
u &= ~BIT(pin);
writel_relaxed(u, mvebu_gpioreg_blink(mvchip));
spin_unlock_irqrestore(&mvchip->lock, flags);
}
@ -247,7 +248,7 @@ static int mvebu_gpio_direction_input(struct gpio_chip *chip, unsigned int pin)
spin_lock_irqsave(&mvchip->lock, flags);
u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
u |= 1 << pin;
u |= BIT(pin);
writel_relaxed(u, mvebu_gpioreg_io_conf(mvchip));
spin_unlock_irqrestore(&mvchip->lock, flags);
@ -275,7 +276,7 @@ static int mvebu_gpio_direction_output(struct gpio_chip *chip, unsigned int pin,
spin_lock_irqsave(&mvchip->lock, flags);
u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
u &= ~(1 << pin);
u &= ~BIT(pin);
writel_relaxed(u, mvebu_gpioreg_io_conf(mvchip));
spin_unlock_irqrestore(&mvchip->lock, flags);
@ -392,7 +393,7 @@ static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
pin = d->hwirq;
u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip)) & (1 << pin);
u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip)) & BIT(pin);
if (!u)
return -EINVAL;
@ -412,13 +413,13 @@ static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_LEVEL_HIGH:
u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
u &= ~(1 << pin);
u &= ~BIT(pin);
writel_relaxed(u, mvebu_gpioreg_in_pol(mvchip));
break;
case IRQ_TYPE_EDGE_FALLING:
case IRQ_TYPE_LEVEL_LOW:
u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
u |= 1 << pin;
u |= BIT(pin);
writel_relaxed(u, mvebu_gpioreg_in_pol(mvchip));
break;
case IRQ_TYPE_EDGE_BOTH: {
@ -431,10 +432,10 @@ static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
* set initial polarity based on current input level
*/
u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
if (v & (1 << pin))
u |= 1 << pin; /* falling */
if (v & BIT(pin))
u |= BIT(pin); /* falling */
else
u &= ~(1 << pin); /* rising */
u &= ~BIT(pin); /* rising */
writel_relaxed(u, mvebu_gpioreg_in_pol(mvchip));
break;
}
@ -464,7 +465,7 @@ static void mvebu_gpio_irq_handler(struct irq_desc *desc)
irq = irq_find_mapping(mvchip->domain, i);
if (!(cause & (1 << i)))
if (!(cause & BIT(i)))
continue;
type = irq_get_trigger_type(irq);
@ -473,7 +474,7 @@ static void mvebu_gpio_irq_handler(struct irq_desc *desc)
u32 polarity;
polarity = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
polarity ^= 1 << i;
polarity ^= BIT(i);
writel_relaxed(polarity, mvebu_gpioreg_in_pol(mvchip));
}
@ -510,7 +511,7 @@ static void mvebu_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
if (!label)
continue;
msk = 1 << i;
msk = BIT(i);
is_out = !(io_conf & msk);
seq_printf(s, " gpio-%-3d (%-20.20s)", chip->base + i, label);