@@ -7,6 +7,16 @@
*
* Links to reference manuals for the supported PWM chips can be found in
* Documentation/arm/microchip.rst.
+ *
+ * Limitations:
+ * - Periods start with the inactive level.
+ * - Hardware has to be stopped in general to update settings.
+ *
+ * Software bugs/possible improvements:
+ * - When atmel_pwm_apply() is called with state->enabled=false a change in
+ * state->polarity isn't honored.
+ * - Instead of sleeping to wait for a completed period, the interrupt
+ * functionality could be used.
*/
#include <linux/clk.h>
This documents the my findings while reading through the driver and the reference manual. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> --- Changes since (implicit) v1 sent with Message-Id: 20190816093748.11769-1-uwe@kleine-koenig.org: - Add some prosa to commit log drivers/pwm/pwm-atmel.c | 10 ++++++++++ 1 file changed, 10 insertions(+)