gpio: rcar: Implement gpiochip.set_multiple()
This allows to set multiple outputs using a single register write.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index d9ab0cd..3fe8e77 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -336,6 +336,25 @@
spin_unlock_irqrestore(&p->lock, flags);
}
+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 (!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_direction_output(struct gpio_chip *chip, unsigned offset,
int value)
{
@@ -476,6 +495,7 @@
gpio_chip->get = gpio_rcar_get;
gpio_chip->direction_output = gpio_rcar_direction_output;
gpio_chip->set = gpio_rcar_set;
+ gpio_chip->set_multiple = gpio_rcar_set_multiple;
gpio_chip->label = name;
gpio_chip->parent = dev;
gpio_chip->owner = THIS_MODULE;