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Commit 4e2678b5 authored by Linus Walleij's avatar Linus Walleij
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gpio: stmpe: use BIT() macro 



Avoid custom (1 << bits) shifting by consequently using the
BIT() macro from <linux/bitops.h>.

Reviewed-by: default avatarPatrice Chotard <patrice.chotard@st.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 96b2cca6

drivers/gpio/gpio-stmpe.c

+12 −12
Original line number Diff line number Diff line
@@ -43,7 +43,7 @@ static int stmpe_gpio_get(struct gpio_chip *chip, unsigned offset) 
	struct stmpe_gpio *stmpe_gpio = gpiochip_get_data(chip);

	struct stmpe *stmpe = stmpe_gpio->stmpe;

	u8 reg = stmpe->regs[STMPE_IDX_GPMR_LSB + (offset / 8)];

	u8 mask = 1 << (offset % 8);

	u8 mask = BIT(offset % 8);

	int ret;



	ret = stmpe_reg_read(stmpe, reg);
@@ -59,7 +59,7 @@ static void stmpe_gpio_set(struct gpio_chip *chip, unsigned offset, int val) 
	struct stmpe *stmpe = stmpe_gpio->stmpe;

	int which = val ? STMPE_IDX_GPSR_LSB : STMPE_IDX_GPCR_LSB;

	u8 reg = stmpe->regs[which + (offset / 8)];

	u8 mask = 1 << (offset % 8);

	u8 mask = BIT(offset % 8);



	/*

	 * Some variants have single register for gpio set/clear functionality.
@@ -77,7 +77,7 @@ static int stmpe_gpio_get_direction(struct gpio_chip *chip, 
	struct stmpe_gpio *stmpe_gpio = gpiochip_get_data(chip);

	struct stmpe *stmpe = stmpe_gpio->stmpe;

	u8 reg = stmpe->regs[STMPE_IDX_GPDR_LSB] - (offset / 8);

	u8 mask = 1 << (offset % 8);

	u8 mask = BIT(offset % 8);

	int ret;



	ret = stmpe_reg_read(stmpe, reg);
@@ -93,7 +93,7 @@ static int stmpe_gpio_direction_output(struct gpio_chip *chip, 
	struct stmpe_gpio *stmpe_gpio = gpiochip_get_data(chip);

	struct stmpe *stmpe = stmpe_gpio->stmpe;

	u8 reg = stmpe->regs[STMPE_IDX_GPDR_LSB + (offset / 8)];

	u8 mask = 1 << (offset % 8);

	u8 mask = BIT(offset % 8);



	stmpe_gpio_set(chip, offset, val);
@@ -106,7 +106,7 @@ static int stmpe_gpio_direction_input(struct gpio_chip *chip, 
	struct stmpe_gpio *stmpe_gpio = gpiochip_get_data(chip);

	struct stmpe *stmpe = stmpe_gpio->stmpe;

	u8 reg = stmpe->regs[STMPE_IDX_GPDR_LSB + (offset / 8)];

	u8 mask = 1 << (offset % 8);

	u8 mask = BIT(offset % 8);



	return stmpe_set_bits(stmpe, reg, mask, 0);

}
@@ -116,10 +116,10 @@ static int stmpe_gpio_request(struct gpio_chip *chip, unsigned offset) 
	struct stmpe_gpio *stmpe_gpio = gpiochip_get_data(chip);

	struct stmpe *stmpe = stmpe_gpio->stmpe;



	if (stmpe_gpio->norequest_mask & (1 << offset))

	if (stmpe_gpio->norequest_mask & BIT(offset))

		return -EINVAL;



	return stmpe_set_altfunc(stmpe, 1 << offset, STMPE_BLOCK_GPIO);

	return stmpe_set_altfunc(stmpe, BIT(offset), STMPE_BLOCK_GPIO);

}



static const struct gpio_chip template_chip = {
@@ -140,7 +140,7 @@ static int stmpe_gpio_irq_set_type(struct irq_data *d, unsigned int type) 
	struct stmpe_gpio *stmpe_gpio = gpiochip_get_data(gc);

	int offset = d->hwirq;

	int regoffset = offset / 8;

	int mask = 1 << (offset % 8);

	int mask = BIT(offset % 8);



	if (type & IRQ_TYPE_LEVEL_LOW || type & IRQ_TYPE_LEVEL_HIGH)

		return -EINVAL;
@@ -218,7 +218,7 @@ static void stmpe_gpio_irq_mask(struct irq_data *d) 
	struct stmpe_gpio *stmpe_gpio = gpiochip_get_data(gc);

	int offset = d->hwirq;

	int regoffset = offset / 8;

	int mask = 1 << (offset % 8);

	int mask = BIT(offset % 8);



	stmpe_gpio->regs[REG_IE][regoffset] &= ~mask;

}
@@ -230,7 +230,7 @@ static void stmpe_gpio_irq_unmask(struct irq_data *d) 
	struct stmpe *stmpe = stmpe_gpio->stmpe;

	int offset = d->hwirq;

	int regoffset = offset / 8;

	int mask = 1 << (offset % 8);

	int mask = BIT(offset % 8);



	stmpe_gpio->regs[REG_IE][regoffset] |= mask;
@@ -254,7 +254,7 @@ static void stmpe_dbg_show_one(struct seq_file *s, 
	bool val = !!stmpe_gpio_get(gc, offset);

	u8 bank = offset / 8;

	u8 dir_reg = stmpe->regs[STMPE_IDX_GPDR_LSB + bank];

	u8 mask = 1 << (offset % 8);

	u8 mask = BIT(offset % 8);

	int ret;

	u8 dir;
@@ -401,7 +401,7 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev) 
							 line);



			handle_nested_irq(child_irq);

			stat &= ~(1 << bit);

			stat &= ~BIT(bit);

		}



		/*