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authorGeert Uytterhoeven <geert+renesas@glider.be>2016-03-14 16:21:44 +0100
committerLinus Walleij <linus.walleij@linaro.org>2016-03-30 10:38:50 +0200
commitdbb763b8ea5d8eb0ce3e45e289969f6f1f418921 (patch)
treef79d7c5d4be2ecdd067714cf1de0a735f97c7bdf /drivers/gpio/gpio-rcar.c
parentf85834229b1808781b0b56a9d637e19312916300 (diff)
downloadop-kernel-dev-dbb763b8ea5d8eb0ce3e45e289969f6f1f418921.zip
op-kernel-dev-dbb763b8ea5d8eb0ce3e45e289969f6f1f418921.tar.gz
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>
Diffstat (limited to 'drivers/gpio/gpio-rcar.c')
-rw-r--r--drivers/gpio/gpio-rcar.c20
1 files changed, 20 insertions, 0 deletions
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 @@ static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value)
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 @@ static int gpio_rcar_probe(struct platform_device *pdev)
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;
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