--- zzzz-none-000/linux-3.10.107/arch/arm/mach-pxa/palmtc.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/arm/mach-pxa/palmtc.c	2021-02-04 17:41:59.000000000 +0000
@@ -18,6 +18,7 @@
 #include <linux/delay.h>
 #include <linux/irq.h>
 #include <linux/input.h>
+#include <linux/pwm.h>
 #include <linux/pwm_backlight.h>
 #include <linux/gpio.h>
 #include <linux/input/matrix_keypad.h>
@@ -166,45 +167,15 @@
  * Backlight
  ******************************************************************************/
 #if defined(CONFIG_BACKLIGHT_PWM) || defined(CONFIG_BACKLIGHT_PWM_MODULE)
-static int palmtc_backlight_init(struct device *dev)
-{
-	int ret;
-
-	ret = gpio_request(GPIO_NR_PALMTC_BL_POWER, "BL POWER");
-	if (ret)
-		goto err;
-	ret = gpio_direction_output(GPIO_NR_PALMTC_BL_POWER, 1);
-	if (ret)
-		goto err2;
-
-	return 0;
-
-err2:
-	gpio_free(GPIO_NR_PALMTC_BL_POWER);
-err:
-	return ret;
-}
-
-static int palmtc_backlight_notify(struct device *dev, int brightness)
-{
-	/* backlight is on when GPIO16 AF0 is high */
-	gpio_set_value(GPIO_NR_PALMTC_BL_POWER, brightness);
-	return brightness;
-}
-
-static void palmtc_backlight_exit(struct device *dev)
-{
-	gpio_free(GPIO_NR_PALMTC_BL_POWER);
-}
+static struct pwm_lookup palmtc_pwm_lookup[] = {
+	PWM_LOOKUP("pxa25x-pwm.1", 0, "pwm-backlight.0", NULL, PALMTC_PERIOD_NS,
+		   PWM_POLARITY_NORMAL),
+};
 
 static struct platform_pwm_backlight_data palmtc_backlight_data = {
-	.pwm_id		= 1,
 	.max_brightness	= PALMTC_MAX_INTENSITY,
 	.dft_brightness	= PALMTC_MAX_INTENSITY,
-	.pwm_period_ns	= PALMTC_PERIOD_NS,
-	.init		= palmtc_backlight_init,
-	.notify		= palmtc_backlight_notify,
-	.exit		= palmtc_backlight_exit,
+	.enable_gpio	= GPIO_NR_PALMTC_BL_POWER,
 };
 
 static struct platform_device palmtc_backlight = {
@@ -217,6 +188,7 @@
 
 static void __init palmtc_pwm_init(void)
 {
+	pwm_add_table(palmtc_pwm_lookup, ARRAY_SIZE(palmtc_pwm_lookup));
 	platform_device_register(&palmtc_backlight);
 }
 #else