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-rw-r--r--drivers/pwm/pwm-pxa.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index 00063ead7c0a..46ed668bd141 100644
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -6,6 +6,13 @@
*
* 2008-02-13 initial version
* eric miao <eric.miao@marvell.com>
+ *
+ * Links to reference manuals for some of the supported PWM chips can be found
+ * in Documentation/arm/marvell.rst.
+ *
+ * Limitations:
+ * - When PWM is stopped, the current PWM period stops abruptly at the next
+ * input clock (PWMCR_SD is set) and the output is driven to inactive.
*/
#include <linux/module.h>