1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/drivers/pwm/sysfs.c b/kernel/drivers/pwm/sysfs.c
index 9c90886f4..375008e2b 100644
--- a/kernel/drivers/pwm/sysfs.c
+++ b/kernel/drivers/pwm/sysfs.c
@@ -350,6 +350,26 @@ void pwmchip_sysfs_unexport(struct pwm_chip *chip)
 	}
 }
 
+void pwmchip_sysfs_unexport_children(struct pwm_chip *chip)
+{
+	struct device *parent;
+	unsigned int i;
+
+	parent = class_find_device(&pwm_class, NULL, chip,
+				   pwmchip_sysfs_match);
+	if (!parent)
+		return;
+
+	for (i = 0; i < chip->npwm; i++) {
+		struct pwm_device *pwm = &chip->pwms[i];
+
+		if (test_bit(PWMF_EXPORTED, &pwm->flags))
+			pwm_unexport_child(parent, pwm);
+	}
+
+	put_device(parent);
+}
+
 static int __init pwm_sysfs_init(void)
 {
 	return class_register(&pwm_class);