--- zzzz-none-000/linux-3.10.107/drivers/platform/x86/samsung-q10.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/platform/x86/samsung-q10.c	2021-02-04 17:41:59.000000000 +0000
@@ -14,16 +14,12 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/backlight.h>
-#include <linux/i8042.h>
 #include <linux/dmi.h>
+#include <linux/acpi.h>
 
-#define SAMSUNGQ10_BL_MAX_INTENSITY      255
-#define SAMSUNGQ10_BL_DEFAULT_INTENSITY  185
+#define SAMSUNGQ10_BL_MAX_INTENSITY 7
 
-#define SAMSUNGQ10_BL_8042_CMD           0xbe
-#define SAMSUNGQ10_BL_8042_DATA          { 0x89, 0x91 }
-
-static int samsungq10_bl_brightness;
+static acpi_handle ec_handle;
 
 static bool force;
 module_param(force, bool, 0);
@@ -33,50 +29,27 @@
 static int samsungq10_bl_set_intensity(struct backlight_device *bd)
 {
 
-	int brightness = bd->props.brightness;
-	unsigned char c[3] = SAMSUNGQ10_BL_8042_DATA;
+	acpi_status status;
+	int i;
 
-	c[2] = (unsigned char)brightness;
-	i8042_lock_chip();
-	i8042_command(c, (0x30 << 8) | SAMSUNGQ10_BL_8042_CMD);
-	i8042_unlock_chip();
-	samsungq10_bl_brightness = brightness;
+	for (i = 0; i < SAMSUNGQ10_BL_MAX_INTENSITY; i++) {
+		status = acpi_evaluate_object(ec_handle, "_Q63", NULL, NULL);
+		if (ACPI_FAILURE(status))
+			return -EIO;
+	}
+	for (i = 0; i < bd->props.brightness; i++) {
+		status = acpi_evaluate_object(ec_handle, "_Q64", NULL, NULL);
+		if (ACPI_FAILURE(status))
+			return -EIO;
+	}
 
 	return 0;
 }
 
-static int samsungq10_bl_get_intensity(struct backlight_device *bd)
-{
-	return samsungq10_bl_brightness;
-}
-
 static const struct backlight_ops samsungq10_bl_ops = {
-	.get_brightness = samsungq10_bl_get_intensity,
 	.update_status	= samsungq10_bl_set_intensity,
 };
 
-#ifdef CONFIG_PM_SLEEP
-static int samsungq10_suspend(struct device *dev)
-{
-	return 0;
-}
-
-static int samsungq10_resume(struct device *dev)
-{
-
-	struct backlight_device *bd = dev_get_drvdata(dev);
-
-	samsungq10_bl_set_intensity(bd);
-	return 0;
-}
-#else
-#define samsungq10_suspend NULL
-#define samsungq10_resume  NULL
-#endif
-
-static SIMPLE_DEV_PM_OPS(samsungq10_pm_ops,
-			  samsungq10_suspend, samsungq10_resume);
-
 static int samsungq10_probe(struct platform_device *pdev)
 {
 
@@ -93,9 +66,6 @@
 
 	platform_set_drvdata(pdev, bd);
 
-	bd->props.brightness = SAMSUNGQ10_BL_DEFAULT_INTENSITY;
-	samsungq10_bl_set_intensity(bd);
-
 	return 0;
 }
 
@@ -104,9 +74,6 @@
 
 	struct backlight_device *bd = platform_get_drvdata(pdev);
 
-	bd->props.brightness = SAMSUNGQ10_BL_DEFAULT_INTENSITY;
-	samsungq10_bl_set_intensity(bd);
-
 	backlight_device_unregister(bd);
 
 	return 0;
@@ -115,8 +82,6 @@
 static struct platform_driver samsungq10_driver = {
 	.driver		= {
 		.name	= KBUILD_MODNAME,
-		.owner	= THIS_MODULE,
-		.pm	= &samsungq10_pm_ops,
 	},
 	.probe		= samsungq10_probe,
 	.remove		= samsungq10_remove,
@@ -172,11 +137,16 @@
 	if (!force && !dmi_check_system(samsungq10_dmi_table))
 		return -ENODEV;
 
+	ec_handle = ec_get_handle();
+
+	if (!ec_handle)
+		return -ENODEV;
+
 	samsungq10_device = platform_create_bundle(&samsungq10_driver,
 						   samsungq10_probe,
 						   NULL, 0, NULL, 0);
 
-	return PTR_RET(samsungq10_device);
+	return PTR_ERR_OR_ZERO(samsungq10_device);
 }
 
 static void __exit samsungq10_exit(void)