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gpio: omap: use BIT() macro instead of shifting bits

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Using the BIT() macro instead of shifting bits
makes the code less error prone and also more readable.

Signed-off-by: Javier Martinez Canillas <javier@dowhile0.org>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Javier Martinez Canillas 2014-04-27 02:00:49 +02:00 committed by Linus Walleij
parent 459b81808f
commit b1e9fec2b8
1 changed files with 25 additions and 25 deletions
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50
drivers/gpio/gpio-omap.c
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@ -83,11 +83,11 @@ struct gpio_bank {
};
#define GPIO_INDEX(bank, gpio) (gpio % bank->width)
#define GPIO_BIT(bank, gpio) (1 << GPIO_INDEX(bank, gpio))
#define GPIO_BIT(bank, gpio) (BIT(GPIO_INDEX(bank, gpio)))
#define GPIO_MOD_CTRL_BIT BIT(0)
#define BANK_USED(bank) (bank->mod_usage || bank->irq_usage)
#define LINE_USED(line, offset) (line & (1 << offset))
#define LINE_USED(line, offset) (line & (BIT(offset)))
static int irq_to_gpio(struct gpio_bank *bank, unsigned int gpio_irq)
{
@ -108,9 +108,9 @@ static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
reg += bank->regs->direction;
l = readl_relaxed(reg);
if (is_input)
l |= 1 << gpio;
l |= BIT(gpio);
else
l &= ~(1 << gpio);
l &= ~(BIT(gpio));
writel_relaxed(l, reg);
bank->context.oe = l;
}
@ -153,14 +153,14 @@ static int _get_gpio_datain(struct gpio_bank *bank, int offset)
{
void __iomem *reg = bank->base + bank->regs->datain;
return (readl_relaxed(reg) & (1 << offset)) != 0;
return (readl_relaxed(reg) & (BIT(offset))) != 0;
}
static int _get_gpio_dataout(struct gpio_bank *bank, int offset)
{
void __iomem *reg = bank->base + bank->regs->dataout;
return (readl_relaxed(reg) & (1 << offset)) != 0;
return (readl_relaxed(reg) & (BIT(offset))) != 0;
}
static inline void _gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set)
@ -297,7 +297,7 @@ static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio,
unsigned trigger)
{
void __iomem *base = bank->base;
u32 gpio_bit = 1 << gpio;
u32 gpio_bit = BIT(gpio);
_gpio_rmw(base, bank->regs->leveldetect0, gpio_bit,
trigger & IRQ_TYPE_LEVEL_LOW);
@ -366,9 +366,9 @@ static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio)
l = readl_relaxed(reg);
if ((l >> gpio) & 1)
l &= ~(1 << gpio);
l &= ~(BIT(gpio));
else
l |= 1 << gpio;
l |= BIT(gpio);
writel_relaxed(l, reg);
}
@ -390,11 +390,11 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio,
l = readl_relaxed(reg);
if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
bank->toggle_mask |= 1 << gpio;
bank->toggle_mask |= BIT(gpio);
if (trigger & IRQ_TYPE_EDGE_RISING)
l |= 1 << gpio;
l |= BIT(gpio);
else if (trigger & IRQ_TYPE_EDGE_FALLING)
l &= ~(1 << gpio);
l &= ~(BIT(gpio));
else
return -EINVAL;
@ -411,10 +411,10 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio,
if (trigger & IRQ_TYPE_EDGE_RISING)
l |= 2 << (gpio << 1);
if (trigger & IRQ_TYPE_EDGE_FALLING)
l |= 1 << (gpio << 1);
l |= BIT(gpio << 1);
/* Enable wake-up during idle for dynamic tick */
_gpio_rmw(base, bank->regs->wkup_en, 1 << gpio, trigger);
_gpio_rmw(base, bank->regs->wkup_en, BIT(gpio), trigger);
bank->context.wake_en =
readl_relaxed(bank->base + bank->regs->wkup_en);
writel_relaxed(l, reg);
@ -428,7 +428,7 @@ static void _enable_gpio_module(struct gpio_bank *bank, unsigned offset)
void __iomem *reg = bank->base + bank->regs->pinctrl;
/* Claim the pin for MPU */
writel_relaxed(readl_relaxed(reg) | (1 << offset), reg);
writel_relaxed(readl_relaxed(reg) | (BIT(offset)), reg);
}
if (bank->regs->ctrl && !BANK_USED(bank)) {
@ -451,7 +451,7 @@ static void _disable_gpio_module(struct gpio_bank *bank, unsigned offset)
!LINE_USED(bank->mod_usage, offset) &&
!LINE_USED(bank->irq_usage, offset)) {
/* Disable wake-up during idle for dynamic tick */
_gpio_rmw(base, bank->regs->wkup_en, 1 << offset, 0);
_gpio_rmw(base, bank->regs->wkup_en, BIT(offset), 0);
bank->context.wake_en =
readl_relaxed(bank->base + bank->regs->wkup_en);
}
@ -507,12 +507,12 @@ static int gpio_irq_type(struct irq_data *d, unsigned type)
if (!LINE_USED(bank->mod_usage, offset)) {
_enable_gpio_module(bank, offset);
_set_gpio_direction(bank, offset, 1);
} else if (!gpio_is_input(bank, 1 << offset)) {
} else if (!gpio_is_input(bank, BIT(offset))) {
spin_unlock_irqrestore(&bank->lock, flags);
return -EINVAL;
}
bank->irq_usage |= 1 << GPIO_INDEX(bank, gpio);
bank->irq_usage |= BIT(GPIO_INDEX(bank, gpio));
spin_unlock_irqrestore(&bank->lock, flags);
if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
@ -549,7 +549,7 @@ static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
{
void __iomem *reg = bank->base;
u32 l;
u32 mask = (1 << bank->width) - 1;
u32 mask = (BIT(bank->width)) - 1;
reg += bank->regs->irqenable;
l = readl_relaxed(reg);
@ -681,7 +681,7 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
_enable_gpio_module(bank, offset);
}
bank->mod_usage |= 1 << offset;
bank->mod_usage |= BIT(offset);
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
@ -693,7 +693,7 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
unsigned long flags;
spin_lock_irqsave(&bank->lock, flags);
bank->mod_usage &= ~(1 << offset);
bank->mod_usage &= ~(BIT(offset));
_disable_gpio_module(bank, offset);
_reset_gpio(bank, bank->chip.base + offset);
spin_unlock_irqrestore(&bank->lock, flags);
@ -763,7 +763,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
while (isr) {
bit = __ffs(isr);
isr &= ~(1 << bit);
isr &= ~(BIT(bit));
/*
* Some chips can't respond to both rising and falling
@ -772,7 +772,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
* to respond to the IRQ for the opposite direction.
* This will be indicated in the bank toggle_mask.
*/
if (bank->toggle_mask & (1 << bit))
if (bank->toggle_mask & (BIT(bit)))
_toggle_gpio_edge_triggering(bank, bit);
generic_handle_irq(irq_find_mapping(bank->chip.irqdomain,
@ -798,7 +798,7 @@ static void gpio_irq_shutdown(struct irq_data *d)
spin_lock_irqsave(&bank->lock, flags);
gpio_unlock_as_irq(&bank->chip, offset);
bank->irq_usage &= ~(1 << offset);
bank->irq_usage &= ~(BIT(offset));
_disable_gpio_module(bank, offset);
_reset_gpio(bank, gpio);
spin_unlock_irqrestore(&bank->lock, flags);
@ -961,7 +961,7 @@ static int gpio_get(struct gpio_chip *chip, unsigned offset)
u32 mask;
bank = container_of(chip, struct gpio_bank, chip);
mask = (1 << offset);
mask = (BIT(offset));
if (gpio_is_input(bank, mask))
return _get_gpio_datain(bank, offset);