Commit 348fb6f7 authored by Lokesh Vutla's avatar Lokesh Vutla Committed by Thierry Reding
Browse files

pwm: omap-dmtimer: Update description for PWM OMAP DM timer 



Update the description with a brief about how PWM is generated using
OMAP DM timer and add limitations for the PWM generations. Also add a
link to the reference manual.

Suggested-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarLokesh Vutla <lokeshvutla@ti.com>
Acked-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 54091b5f

drivers/pwm/pwm-omap-dmtimer.c

+9 −1
Original line number Diff line number Diff line
@@ -10,7 +10,15 @@ 
 *

 * Description:

 *   This file is the core OMAP support for the generic, Linux

 *   PWM driver / controller, using the OMAP's dual-mode timers.

 *   PWM driver / controller, using the OMAP's dual-mode timers

 *   with a timer counter that goes up. When it overflows it gets

 *   reloaded with the load value and the pwm output goes up.

 *   When counter matches with match register, the output goes down.

 *   Reference Manual: http://www.ti.com/lit/ug/spruh73q/spruh73q.pdf

 *

 * Limitations:

 * - When PWM is stopped, timer counter gets stopped immediately. This

 *   doesn't allow the current PWM period to complete and stops abruptly.

 */



#include <linux/clk.h>

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