pwm: Add debugfs interface
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>
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 5710391..047cd53 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -2,6 +2,7 @@
#define __LINUX_PWM_H
struct pwm_device;
+struct seq_file;
/*
* pwm_request - request a PWM device
@@ -65,6 +66,7 @@
* @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_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;
};