diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpio-pisosr.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-pisosr.c b/drivers/gpio/gpio-pisosr.c index f5545049c187..f809a5a8e9eb 100644 --- a/drivers/gpio/gpio-pisosr.c +++ b/drivers/gpio/gpio-pisosr.c @@ -12,6 +12,8 @@ * GNU General Public License version 2 for more details. */ +#include <linux/bitmap.h> +#include <linux/bitops.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/gpio/driver.h> @@ -90,6 +92,25 @@ static int pisosr_gpio_get(struct gpio_chip *chip, unsigned offset) return (gpio->buffer[offset / 8] >> (offset % 8)) & 0x1; } +static int pisosr_gpio_get_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + struct pisosr_gpio *gpio = gpiochip_get_data(chip); + unsigned int nbytes = DIV_ROUND_UP(chip->ngpio, 8); + unsigned int i, j; + + pisosr_gpio_refresh(gpio); + + bitmap_zero(bits, chip->ngpio); + for (i = 0; i < nbytes; i++) { + j = i / sizeof(unsigned long); + bits[j] |= ((unsigned long) gpio->buffer[i]) + << (8 * (i % sizeof(unsigned long))); + } + + return 0; +} + static const struct gpio_chip template_chip = { .label = "pisosr-gpio", .owner = THIS_MODULE, @@ -97,6 +118,7 @@ static const struct gpio_chip template_chip = { .direction_input = pisosr_gpio_direction_input, .direction_output = pisosr_gpio_direction_output, .get = pisosr_gpio_get, + .get_multiple = pisosr_gpio_get_multiple, .base = -1, .ngpio = DEFAULT_NGPIO, .can_sleep = true, |