v4.19.13 snapshot.
diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
new file mode 100644
index 0000000..8ea265a
--- /dev/null
+++ b/include/linux/pwm_backlight.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Generic PWM backlight driver data - see drivers/video/backlight/pwm_bl.c
+ */
+#ifndef __LINUX_PWM_BACKLIGHT_H
+#define __LINUX_PWM_BACKLIGHT_H
+
+#include <linux/backlight.h>
+
+struct platform_pwm_backlight_data {
+ int pwm_id;
+ unsigned int max_brightness;
+ unsigned int dft_brightness;
+ unsigned int lth_brightness;
+ unsigned int pwm_period_ns;
+ unsigned int *levels;
+ unsigned int post_pwm_on_delay;
+ unsigned int pwm_off_delay;
+ /* TODO remove once all users are switched to gpiod_* API */
+ int enable_gpio;
+ int (*init)(struct device *dev);
+ int (*notify)(struct device *dev, int brightness);
+ void (*notify_after)(struct device *dev, int brightness);
+ void (*exit)(struct device *dev);
+ int (*check_fb)(struct device *dev, struct fb_info *info);
+};
+
+#endif