summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/gpio/gpio-pisosr.c22
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,