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pwm: Add debugfs interface

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This commit adds a debugfs interface that can be used to list the
current internal state of the PWM devices registered with the PWM
framework.

Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
This commit is contained in:
Thierry Reding
2012-03-26 09:31:48 +02:00
parent f051c466cf
commit 62099abf67
2 changed files with 96 additions and 0 deletions
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6
include/linux/pwm.h
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@@ -2,6 +2,7 @@
#define __LINUX_PWM_H
struct pwm_device;
struct seq_file;
/*
* pwm_request - request a PWM device
@@ -65,6 +66,7 @@ static inline unsigned int pwm_get_period(struct pwm_device *pwm)
* @config: configure duty cycles and period length for this PWM
* @enable: enable PWM output toggling
* @disable: disable PWM output toggling
* @dbg_show: optional routine to show contents in debugfs
* @owner: helps prevent removal of modules exporting active PWMs
*/
struct pwm_ops {
@@ -79,6 +81,10 @@ struct pwm_ops {
struct pwm_device *pwm);
void (*disable)(struct pwm_chip *chip,
struct pwm_device *pwm);
#ifdef CONFIG_DEBUG_FS
void (*dbg_show)(struct pwm_chip *chip,
struct seq_file *s);
#endif
struct module *owner;
};