diff options
| author | Alexander Stein <alexanders83@web.de> | 2015-04-02 11:55:49 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-05-06 14:45:18 +0200 |
| commit | 1893b2cfad0829f8d93f6d88bd396d353ec024c3 (patch) | |
| tree | cf4212a1f8f3621d9a14cd167c30b3c0301db1bb /drivers/pinctrl/pinctrl-at91.c | |
| parent | 5ebe6afaf0057ac3eaeb98defd5456894b446d22 (diff) | |
| download | linux-1893b2cfad0829f8d93f6d88bd396d353ec024c3.tar.gz | |
pinctrl: at91: Add set_multiple GPIO chip feature
This adds the callback for set_multiple.
As this controller has a separate set and clear register, we
can't write directly to PIO_ODSR as this would required a cached
variable and would race with at91_gpio_set.
So build masks for the PIO_SODR and PIO_CODR registers and
write them together.
Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-at91.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-at91.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c index 2f797cb7e205..d80ade23fd1b 100644 --- a/drivers/pinctrl/pinctrl-at91.c +++ b/drivers/pinctrl/pinctrl-at91.c @@ -1326,6 +1326,21 @@ static void at91_gpio_set(struct gpio_chip *chip, unsigned offset, writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR)); } +static void at91_gpio_set_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip); + void __iomem *pio = at91_gpio->regbase; + +#define BITS_MASK(bits) (((bits) == 32) ? ~0U : (BIT(bits) - 1)) + /* Mask additionally to ngpio as not all GPIO controllers have 32 pins */ + uint32_t set_mask = (*mask & *bits) & BITS_MASK(chip->ngpio); + uint32_t clear_mask = (*mask & ~(*bits)) & BITS_MASK(chip->ngpio); + + writel_relaxed(set_mask, pio + PIO_SODR); + writel_relaxed(clear_mask, pio + PIO_CODR); +} + static int at91_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int val) { @@ -1685,6 +1700,7 @@ static struct gpio_chip at91_gpio_template = { .get = at91_gpio_get, .direction_output = at91_gpio_direction_output, .set = at91_gpio_set, + .set_multiple = at91_gpio_set_multiple, .dbg_show = at91_gpio_dbg_show, .can_sleep = false, .ngpio = MAX_NB_GPIO_PER_BANK, |