static int gpio_rcar_get(struct gpio_chip *chip, unsigned offset)
{
u32 bit = BIT(offset);
/* testing on r8a7790 shows that INDT does not show correct pin state
* when configured as output, so use OUTDT in case of output pins */
if (gpio_rcar_read(gpiochip_get_data(chip), INOUTSEL) & bit)
return !!(gpio_rcar_read(gpiochip_get_data(chip), OUTDT) & bit);
else
return !!(gpio_rcar_read(gpiochip_get_data(chip), INDT) & bit);
}
static irqreturn_t gpio_rcar_irq_handler(int irq, void *dev_id)
{
struct gpio_rcar_priv *p = dev_id;
u32 pending;
unsigned int offset, irqs_handled = 0;
while ((pending = gpio_rcar_read(p, INTDT) &
gpio_rcar_read(p, INTMSK))) {
offset = __ffs(pending);
gpio_rcar_write(p, INTCLR, BIT(offset));
generic_handle_irq(irq_find_mapping(p->irq_domain, offset));
irqs_handled++;
}
return irqs_handled ? IRQ_HANDLED : IRQ_NONE;
}
static void gpio_rcar_modify_bit(struct gpio_rcar_priv *p, int offs,
int bit, bool value)
{
u32 tmp = gpio_rcar_read(p, offs);
if (value)
tmp |= BIT(bit);
else
tmp &= ~BIT(bit);
gpio_rcar_write(p, offs, tmp);
}
static void gpio_rcar_set_multiple(struct gpio_chip *chip, unsigned long *mask,
unsigned long *bits)
{
struct gpio_rcar_priv *p = gpiochip_get_data(chip);
unsigned long flags;
u32 val, bankmask;
bankmask = mask[0] & GENMASK(chip->ngpio - 1, 0);
if (chip->valid_mask)
bankmask &= chip->valid_mask[0];
if (!bankmask)
return;
spin_lock_irqsave(&p->lock, flags);
val = gpio_rcar_read(p, OUTDT);
val &= ~bankmask;
val |= (bankmask & bits[0]);
gpio_rcar_write(p, OUTDT, val);
spin_unlock_irqrestore(&p->lock, flags);
}
static int gpio_rcar_get_direction(struct gpio_chip *chip, unsigned int offset)
{
struct gpio_rcar_priv *p = gpiochip_get_data(chip);
return !(gpio_rcar_read(p, INOUTSEL) & BIT(offset));
}