[PATCH 2/8] drivers/pwm/core: Add support to remove registered consumer lookup tables
In case some drivers are unloading, they can remove lookup tables which
they would have registered during their load time to avoid redundant
entries if loaded again
v2: Ccing maintainers
CC: Samuel Ortiz
Cc: Linus Walleij
Cc: Alexandre Courbot
Cc: Thierry Reding
Signed-off-by: Shobhit Kumar
---
drivers/pwm/core.c | 17 +
include/linux/pwm.h | 5 +
2 files changed, 22 insertions(+)
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index ba34c7d..d2fe7c8d 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -586,6 +586,23 @@ void pwm_add_table(struct pwm_lookup *table, size_t num)
}
/**
+ * pwm_remove_table() - un-register PWM device consumers
+ * @table: array of consumers to un-register
+ * @num: number of consumers in table
+ */
+void pwm_remove_table(struct pwm_lookup *table, size_t num)
+{
+ mutex_lock(_lookup_lock);
+
+ while (num--) {
+ list_del(>list);
+ table++;
+ }
+
+ mutex_unlock(_lookup_lock);
+}
+
+/**
* pwm_get() - look up and request a PWM device
* @dev: device for PWM consumer
* @con_id: consumer name
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index e90628c..cfe2d8d 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -290,10 +290,15 @@ struct pwm_lookup {
#if IS_ENABLED(CONFIG_PWM)
void pwm_add_table(struct pwm_lookup *table, size_t num);
+void pwm_remove_table(struct pwm_lookup *table, size_t num);
#else
static inline void pwm_add_table(struct pwm_lookup *table, size_t num)
{
}
+
+static inline void pwm_remove_table(struct pwm_lookup *table, size_t num)
+{
+}
#endif
#ifdef CONFIG_PWM_SYSFS
--
2.1.0
--
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[PATCH 2/8] drivers/pwm/core: Add support to remove registered consumer lookup tables
In case some drivers are unloading, they can remove lookup tables which
they would have registered during their load time to avoid redundant
entries if loaded again
v2: Ccing maintainers
CC: Samuel Ortiz sa...@linux.intel.com
Cc: Linus Walleij linus.wall...@linaro.org
Cc: Alexandre Courbot gnu...@gmail.com
Cc: Thierry Reding thierry.red...@gmail.com
Signed-off-by: Shobhit Kumar shobhit.ku...@intel.com
---
drivers/pwm/core.c | 17 +
include/linux/pwm.h | 5 +
2 files changed, 22 insertions(+)
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index ba34c7d..d2fe7c8d 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -586,6 +586,23 @@ void pwm_add_table(struct pwm_lookup *table, size_t num)
}
/**
+ * pwm_remove_table() - un-register PWM device consumers
+ * @table: array of consumers to un-register
+ * @num: number of consumers in table
+ */
+void pwm_remove_table(struct pwm_lookup *table, size_t num)
+{
+ mutex_lock(pwm_lookup_lock);
+
+ while (num--) {
+ list_del(table-list);
+ table++;
+ }
+
+ mutex_unlock(pwm_lookup_lock);
+}
+
+/**
* pwm_get() - look up and request a PWM device
* @dev: device for PWM consumer
* @con_id: consumer name
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index e90628c..cfe2d8d 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -290,10 +290,15 @@ struct pwm_lookup {
#if IS_ENABLED(CONFIG_PWM)
void pwm_add_table(struct pwm_lookup *table, size_t num);
+void pwm_remove_table(struct pwm_lookup *table, size_t num);
#else
static inline void pwm_add_table(struct pwm_lookup *table, size_t num)
{
}
+
+static inline void pwm_remove_table(struct pwm_lookup *table, size_t num)
+{
+}
#endif
#ifdef CONFIG_PWM_SYSFS
--
2.1.0
--
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