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Diffstat (limited to 'include/linux/pwm.h')
-rw-r--r--include/linux/pwm.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index d681f6875..cfc3ed46c 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -2,6 +2,7 @@
#define __LINUX_PWM_H
#include <linux/err.h>
+#include <linux/mutex.h>
#include <linux/of.h>
struct pwm_device;
@@ -87,6 +88,7 @@ enum {
* @pwm: global index of the PWM device
* @chip: PWM chip providing this PWM device
* @chip_data: chip-private data associated with the PWM device
+ * @lock: used to serialize accesses to the PWM device where necessary
* @period: period of the PWM signal (in nanoseconds)
* @duty_cycle: duty cycle of the PWM signal (in nanoseconds)
* @polarity: polarity of the PWM signal
@@ -98,6 +100,7 @@ struct pwm_device {
unsigned int pwm;
struct pwm_chip *chip;
void *chip_data;
+ struct mutex lock;
unsigned int period;
unsigned int duty_cycle;