Add a new gpiod_multi_set_value_cansleep() helper function with fewer
parameters than gpiod_set_array_value_cansleep().

Calling gpiod_set_array_value_cansleep() can get quite verbose. In many
cases, the first arguments all come from the same struct gpio_descs, so
having a separate function where we can just pass that cuts down on the
boilerplate.

Signed-off-by: David Lechner <dlechner@baylibre.com>
---

FYI, I dropped Linus' Reviewed-by: tag since adding the IS_ERR_OR_NULL()
check isn't exactly trivial.
---
 include/linux/gpio/consumer.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index db2dfbae8edbd12059826183b1c0f73c7a58ff40..5cbd4afd78625367a761e224acc3f7336d310dd0 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h

@@ -3,6 +3,7 @@
 #define __LINUX_GPIO_CONSUMER_H
 
 #include <linux/bits.h>
+#include <linux/err.h>
 #include <linux/types.h>
 
 struct acpi_device;

@@ -655,4 +656,14 @@ static inline void gpiod_unexport(struct gpio_desc *desc)
 
 #endif /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */
 
+static inline int gpiod_multi_set_value_cansleep(struct gpio_descs *descs,
+						 unsigned long *value_bitmap)
+{
+	if (IS_ERR_OR_NULL(descs))
+		return PTR_ERR_OR_ZERO(descs);
+
+	return gpiod_set_array_value_cansleep(descs->ndescs, descs->desc,
+					      descs->info, value_bitmap);
+}
+
 #endif

-- 
2.43.0