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authorShobhit Kumar <shobhit.kumar@intel.com>2015-05-05 15:04:18 +0530
committerThierry Reding <thierry.reding@gmail.com>2015-05-06 14:19:35 +0200
commitefb0de55b6a2ec15fc424e660601f22ae2fa487a (patch)
tree0ba5c7c3ef4b77c8fe9755ab371fa6302e2ceb0d /drivers/pwm
parentb787f68c36d49bb1d9236f403813641efa74a031 (diff)
pwm: Add support to remove registered consumer lookup tables
In case some drivers are unloading, they can remove lookup tables which they had registered during their load time to avoid redundant entries if loaded again. CC: Samuel Ortiz <sameo@linux.intel.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Thierry Reding <thierry.reding@gmail.com> Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
-rw-r--r--drivers/pwm/core.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index ba34c7d89042..27cd58d16881 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() - unregister PWM device consumers
+ * @table: array of consumers to unregister
+ * @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