Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0bcf168b authored by Tushar Behera's avatar Tushar Behera Committed by Thierry Reding
Browse files

pwm: Fix compilation error when CONFIG_PWM is not defined 



Add dummy implemention of public symbols for compilation-safe inclusion
of include/linux/pwm.h file when CONFIG_PWM is not defined.

Reported-by: default avatarSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: default avatarTushar Behera <tushar.behera@linaro.org>
Signed-off-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
parent 7b27c160

include/linux/pwm.h

+80 −2
Original line number Diff line number Diff line 
#ifndef __LINUX_PWM_H

#define __LINUX_PWM_H



#include <linux/err.h>

#include <linux/of.h>



struct pwm_device;

struct seq_file;



#if IS_ENABLED(CONFIG_PWM) || IS_ENABLED(CONFIG_HAVE_PWM)

/*

 * pwm_request - request a PWM device

 */
@@ -30,8 +32,31 @@ int pwm_enable(struct pwm_device *pwm); 
 * pwm_disable - stop a PWM output toggling

 */

void pwm_disable(struct pwm_device *pwm);

#else

static inline struct pwm_device *pwm_request(int pwm_id, const char *label)

{

	return ERR_PTR(-ENODEV);

}



static inline void pwm_free(struct pwm_device *pwm)

{

}



static inline int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)

{

	return -EINVAL;

}



static inline int pwm_enable(struct pwm_device *pwm)

{

	return -EINVAL;

}



static inline void pwm_disable(struct pwm_device *pwm)

{

}

#endif



#ifdef CONFIG_PWM

struct pwm_chip;



/**
@@ -136,6 +161,7 @@ struct pwm_chip { 
	unsigned int		of_pwm_n_cells;

};



#if IS_ENABLED(CONFIG_PWM)

int pwm_set_chip_data(struct pwm_device *pwm, void *data);

void *pwm_get_chip_data(struct pwm_device *pwm);
@@ -150,6 +176,54 @@ void pwm_put(struct pwm_device *pwm); 


struct pwm_device *devm_pwm_get(struct device *dev, const char *consumer);

void devm_pwm_put(struct device *dev, struct pwm_device *pwm);

#else

static inline int pwm_set_chip_data(struct pwm_device *pwm, void *data)

{

	return -EINVAL;

}



static inline void *pwm_get_chip_data(struct pwm_device *pwm)

{

	return NULL;

}



static inline int pwmchip_add(struct pwm_chip *chip)

{

	return -EINVAL;

}



static inline int pwmchip_remove(struct pwm_chip *chip)

{

	return -EINVAL;

}



static inline struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip,

						       unsigned int index,

						       const char *label)

{

	return ERR_PTR(-ENODEV);

}



static inline struct pwm_device *pwm_get(struct device *dev,

					 const char *consumer)

{

	return ERR_PTR(-ENODEV);

}



static inline void pwm_put(struct pwm_device *pwm)

{

}



static inline struct pwm_device *devm_pwm_get(struct device *dev,

					      const char *consumer)

{

	return ERR_PTR(-ENODEV);

}



static inline void devm_pwm_put(struct device *dev, struct pwm_device *pwm)

{

}

#endif



struct pwm_lookup {

	struct list_head list;
@@ -167,8 +241,12 @@ struct pwm_lookup { 
		.con_id = _con_id,			\

	}



#if IS_ENABLED(CONFIG_PWM)

void pwm_add_table(struct pwm_lookup *table, size_t num);



#else

static inline void pwm_add_table(struct pwm_lookup *table, size_t num)

{

}

#endif



#endif /* __LINUX_PWM_H */