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authorTushar Behera <tushar.behera@linaro.org>2012-09-12 14:01:46 +0400
committerThierry Reding <thierry.reding@avionic-design.de>2012-09-20 14:52:02 +0400
commit0bcf168b024871c64eb5df157739efd2ae9b0bdf (patch)
tree565639539efdc981bd9a7a83dfa1310f8553f902 /include/linux/pwm.h
parent7b27c160c68152581c702b9f1fe362338d2a0cad (diff)
downloadlinux-0bcf168b024871c64eb5df157739efd2ae9b0bdf.tar.xz
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: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Diffstat (limited to 'include/linux/pwm.h')
-rw-r--r--include/linux/pwm.h82
1 files changed, 80 insertions, 2 deletions
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 40c764318957..112b31436848 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -1,11 +1,13 @@
#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 */