diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2016-03-14 18:21:44 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-03-30 11:38:50 +0300 |
| commit | dbb763b8ea5d8eb0ce3e45e289969f6f1f418921 (patch) | |
| tree | f79d7c5d4be2ecdd067714cf1de0a735f97c7bdf /drivers/gpio/gpio-rcar.c | |
| parent | f85834229b1808781b0b56a9d637e19312916300 (diff) | |
| download | linux-dbb763b8ea5d8eb0ce3e45e289969f6f1f418921.tar.xz | |
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.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c index d9ab0cd1d205..3fe8e773d95c 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; |