Merge tag 'platform-drivers-x86-v4.12-1' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform-drivers update from Darren Hart:
 "This represents a significantly larger and more complex set of changes
  than those of prior merge windows.

  In particular, we had several changes with dependencies on other
  subsystems which we felt were best managed through merges of immutable
  branches, including one each from input, i2c, and leds. Two patches
  for the watchdog subsystem are included after discussion with Wim and
  Guenter following a collision in linux-next (this should be resolved
  and you should only see these two appear in this pull request). These
  are called out in the "External" section below.

  Summary of changes:
   - significant further cleanup of fujitsu-laptop and hp-wmi
   - new model support for ideapad, asus, silead, and xiaomi
   - new hotkeys for thinkpad and models using intel-vbtn
   - dell keyboard backlight improvements
   - build and dependency improvements
   - intel * ipc fixes, cleanups, and api updates
   - single isolated fixes noted below

  External:
   - watchdog: iTCO_wdt: Add PMC specific noreboot update api
   - watchdog: iTCO_wdt: cleanup set/unset no_reboot_bit functions
   - Merge branch 'ib/4.10-sparse-keymap-managed'
   - Merge branch 'i2c/for-INT33FE'
   - Merge branch 'linux-leds/dell-laptop-changes-for-4.12'

  platform/x86:
   - Add Intel Cherry Trail ACPI INT33FE device driver
   - remove sparse_keymap_free() calls
   - Make SILEAD_DMI depend on TOUCHSCREEN_SILEAD

  asus-wmi:
   - try to set als by default
   - fix cpufv sysfs file permission

  acer-wmi:
   - setup accelerometer when ACPI device was found

  ideapad-laptop:
   - Add IdeaPad V310-15ISK to no_hw_rfkill
   - Add IdeaPad 310-15IKB to no_hw_rfkill

  intel_pmc_ipc:
   - use gcr mem base for S0ix counter read
   - Fix iTCO_wdt GCS memory mapping failure
   - Add pmc gcr read/write/update api's
   - fix gcr offset

  dell-laptop:
   - Add keyboard backlight timeout AC settings
   - Handle return error form dell_get_intensity.
   - Protect kbd_state against races
   - Refactor kbd_led_triggers_store()

  hp-wireless:
   - reuse module_acpi_driver
   - add Xiaomi's hardware id to the supported list

  intel-vbtn:
   - add volume up and down

  INT33FE:
   - add i2c dependency

  hp-wmi:
   - Cleanup exit paths
   - Do not shadow errors in sysfs show functions
   - Use DEVICE_ATTR_(RO|RW) helper macros
   - Refactor dock and tablet state fetchers
   - Cleanup wireless get_(hw|sw)state functions
   - Refactor redundant HPWMI_READ functions
   - Standardize enum usage for constants
   - Cleanup local variable declarations
   - Do not shadow error values
   - Fix detection for dock and tablet mode
   - Fix error value for hp_wmi_tablet_state

  fujitsu-laptop:
   - simplify error handling in acpi_fujitsu_laptop_add()
   - do not log LED registration failures
   - switch to managed LED class devices
   - reorganize LED-related code
   - refactor LED registration
   - select LEDS_CLASS
   - remove redundant fields from struct fujitsu_bl
   - account for backlight power when determining brightness
   - do not log set_lcd_level() failures in bl_update_status()
   - ignore errors when setting backlight power
   - make disable_brightness_adjust a boolean
   - clean up use_alt_lcd_levels handling
   - sync brightness in set_lcd_level()
   - simplify set_lcd_level()
   - merge set_lcd_level_alt() into set_lcd_level()
   - switch to a managed backlight device
   - only handle backlight when appropriate
   - update debug message logged by call_fext_func()
   - rename call_fext_func() arguments
   - simplify call_fext_func()
   - clean up local variables in call_fext_func()
   - remove keycode fields from struct fujitsu_bl
   - model-dependent sparse keymap overrides
   - use a sparse keymap for hotkey event generation
   - switch to a managed hotkey input device
   - refactor hotkey input device setup
   - use a sparse keymap for brightness key events
   - switch to a managed backlight input device
   - refactor backlight input device setup
   - remove pf_device field from struct fujitsu_bl
   - only register platform device if FUJ02E3 is present
   - add and remove platform device in separate functions
   - simplify platform device attribute definitions
   - remove backlight-related attributes from the platform device
   - cleanup error labels in fujitsu_init()
   - only register backlight device if FUJ02B1 is present
   - sync backlight power status in acpi_fujitsu_laptop_add()
   - register backlight device in a separate function
   - simplify brightness key event generation logic
   - decrease indentation in acpi_fujitsu_bl_notify()

  intel-hid:
   - Add missing ->thaw callback
   - do not set parents of input devices explicitly
   - remove redundant set_bit() call
   - use devm_input_allocate_device() for HID events input device
   - make intel_hid_set_enable() take a boolean argument
   - simplify enabling/disabling HID events

  silead_dmi:
   - Add touchscreen info for Surftab Wintron 7.0
   - Abort early if DMI does not match
   - Do not treat all devices as i2c_clients
   - Add entry for Insyde 7W tablets
   - Constify properties arrays

  intel_scu_ipc:
   - Introduce intel_scu_ipc_raw_command()
   - Introduce SCU_DEVICE() macro
   - Remove redundant subarch check
   - Rearrange init sequence
   - Platform data is mandatory

  asus-nb-wmi:
   - Add wapf4 quirk for the X302UA

  dell-*:
   - Call new led hw_changed API on kbd brightness change
   - Add a generic dell-laptop notifier chain

  eeepc-laptop:
   - Skip unknown key messages 0x50 0x51

  thinkpad_acpi:
   - add mapping for new hotkeys
   - guard generic hotkey case"

* tag 'platform-drivers-x86-v4.12-1' of git://git.infradead.org/linux-platform-drivers-x86: (108 commits)
  platform/x86: Make SILEAD_DMI depend on TOUCHSCREEN_SILEAD
  platform/x86: asus-wmi: try to set als by default
  platform/x86: asus-wmi: fix cpufv sysfs file permission
  platform/x86: acer-wmi: setup accelerometer when ACPI device was found
  platform/x86: ideapad-laptop: Add IdeaPad V310-15ISK to no_hw_rfkill
  platform/x86: intel_pmc_ipc: use gcr mem base for S0ix counter read
  platform/x86: intel_pmc_ipc: Fix iTCO_wdt GCS memory mapping failure
  watchdog: iTCO_wdt: Add PMC specific noreboot update api
  watchdog: iTCO_wdt: cleanup set/unset no_reboot_bit functions
  platform/x86: intel_pmc_ipc: Add pmc gcr read/write/update api's
  platform/x86: intel_pmc_ipc: fix gcr offset
  platform/x86: dell-laptop: Add keyboard backlight timeout AC settings
  platform/x86: dell-laptop: Handle return error form dell_get_intensity.
  platform/x86: hp-wireless: reuse module_acpi_driver
  platform/x86: intel-vbtn: add volume up and down
  platform/x86: INT33FE: add i2c dependency
  platform/x86: hp-wmi: Cleanup exit paths
  platform/x86: hp-wmi: Do not shadow errors in sysfs show functions
  platform/x86: hp-wmi: Use DEVICE_ATTR_(RO|RW) helper macros
  platform/x86: hp-wmi: Refactor dock and tablet state fetchers
  ...

31 files changed, 1584 insertions, 1293 deletions

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 883fbe7a2466..8489020ecf44 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -182,7 +182,8 @@ config FUJITSU_LAPTOP
 	depends on INPUT
 	depends on BACKLIGHT_CLASS_DEVICE
 	depends on ACPI_VIDEO || ACPI_VIDEO = n
-	depends on LEDS_CLASS || LEDS_CLASS=n
+	select INPUT_SPARSEKMAP
+	select LEDS_CLASS
 	---help---
 	  This is a driver for laptops built by Fujitsu:
 
@@ -780,6 +781,19 @@ config ACPI_CMPC
 	  keys as input device, backlight device, tablet and accelerometer
 	  devices.
 
+config INTEL_CHT_INT33FE
+	tristate "Intel Cherry Trail ACPI INT33FE Driver"
+	depends on X86 && ACPI && I2C
+	---help---
+	  This driver add support for the INT33FE ACPI device found on
+	  some Intel Cherry Trail devices.
+
+	  The INT33FE ACPI device has a CRS table with I2cSerialBusV2
+	  resources for 3 devices: Maxim MAX17047 Fuel Gauge Controller,
+	  FUSB302 USB Type-C Controller and PI3USB30532 USB switch.
+	  This driver instantiates i2c-clients for these, so that standard
+	  i2c drivers for these chips can bind to the them.
+
 config INTEL_HID_EVENT
 	tristate "INTEL HID Event"
 	depends on ACPI
@@ -1087,7 +1101,7 @@ config INTEL_TURBO_MAX_3
 
 config SILEAD_DMI
 	bool "Tablets with Silead touchscreens"
-	depends on ACPI && DMI && I2C=y && INPUT
+	depends on ACPI && DMI && I2C=y && TOUCHSCREEN_SILEAD
 	---help---
 	  Certain ACPI based tablets with Silead touchscreens do not have
 	  enough data in ACPI tables for the touchscreen driver to handle
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 776b3a7a4984..182a3ed6605a 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_ACPI_TOSHIBA)	+= toshiba_acpi.o
 obj-$(CONFIG_TOSHIBA_BT_RFKILL)	+= toshiba_bluetooth.o
 obj-$(CONFIG_TOSHIBA_HAPS)	+= toshiba_haps.o
 obj-$(CONFIG_TOSHIBA_WMI)	+= toshiba-wmi.o
+obj-$(CONFIG_INTEL_CHT_INT33FE)	+= intel_cht_int33fe.o
 obj-$(CONFIG_INTEL_HID_EVENT)	+= intel-hid.o
 obj-$(CONFIG_INTEL_VBTN)	+= intel-vbtn.o
 obj-$(CONFIG_INTEL_SCU_IPC)	+= intel_scu_ipc.o
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index dac0fbe87460..79fa5ab3fd00 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -1896,7 +1896,7 @@ static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level,
 	if (!strcmp(ctx, "SENR")) {
 		if (acpi_bus_get_device(ah, &dev))
 			return AE_OK;
-		if (!strcmp(ACER_WMID_ACCEL_HID, acpi_device_hid(dev)))
+		if (strcmp(ACER_WMID_ACCEL_HID, acpi_device_hid(dev)))
 			return AE_OK;
 	} else
 		return AE_OK;
@@ -1917,8 +1917,7 @@ static int __init acer_wmi_get_handle(const char *name, const char *prop,
 	handle = NULL;
 	status = acpi_get_devices(prop, acer_wmi_get_handle_cb,
 					(void *)name, &handle);
-
-	if (ACPI_SUCCESS(status)) {
+	if (ACPI_SUCCESS(status) && handle) {
 		*ah = handle;
 		return 0;
 	} else {
@@ -1987,7 +1986,7 @@ static int __init acer_wmi_input_setup(void)
 						acer_wmi_notify, NULL);
 	if (ACPI_FAILURE(status)) {
 		err = -EIO;
-		goto err_free_keymap;
+		goto err_free_dev;
 	}
 
 	err = input_register_device(acer_wmi_input_dev);
@@ -1998,8 +1997,6 @@ static int __init acer_wmi_input_setup(void)
 
 err_uninstall_notifier:
 	wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
-err_free_keymap:
-	sparse_keymap_free(acer_wmi_input_dev);
 err_free_dev:
 	input_free_device(acer_wmi_input_dev);
 	return err;
@@ -2008,7 +2005,6 @@ err_free_dev:
 static void acer_wmi_input_destroy(void)
 {
 	wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
-	sparse_keymap_free(acer_wmi_input_dev);
 	input_unregister_device(acer_wmi_input_dev);
 }
 
@@ -2290,8 +2286,8 @@ static int __init acer_wmi_init(void)
 		if (err)
 			return err;
 		err = acer_wmi_accel_setup();
-		if (err)
-			return err;
+		if (err && err != -ENODEV)
+			pr_warn("Cannot enable accelerometer\n");
 	}
 
 	err = platform_driver_register(&acer_platform_driver);
diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index 28551f5a2e07..c4768be24ba9 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -1516,14 +1516,12 @@ static int asus_input_init(struct asus_laptop *asus)
 	error = input_register_device(input);
 	if (error) {
 		pr_warn("Unable to register input device\n");
-		goto err_free_keymap;
+		goto err_free_dev;
 	}
 
 	asus->inputdev = input;
 	return 0;
 
-err_free_keymap:
-	sparse_keymap_free(input);
 err_free_dev:
 	input_free_device(input);
 	return error;
@@ -1531,10 +1529,8 @@ err_free_dev:
 
 static void asus_input_exit(struct asus_laptop *asus)
 {
-	if (asus->inputdev) {
-		sparse_keymap_free(asus->inputdev);
+	if (asus->inputdev)
 		input_unregister_device(asus->inputdev);
-	}
 	asus->inputdev = NULL;
 }
 
diff --git a/drivers/platform/x86/asus-nb-wmi.c b/drivers/platform/x86/asus-nb-wmi.c
index dea98ffb6f60..5269a01d9bdd 100644
--- a/drivers/platform/x86/asus-nb-wmi.c
+++ b/drivers/platform/x86/asus-nb-wmi.c
@@ -111,6 +111,10 @@ static struct quirk_entry quirk_asus_x550lb = {
 	.xusb2pr = 0x01D9,
 };
 
+static struct quirk_entry quirk_asus_ux330uak = {
+	.wmi_force_als_set = true,
+};
+
 static int dmi_matched(const struct dmi_system_id *dmi)
 {
 	pr_info("Identified laptop model '%s'\n", dmi->ident);
@@ -144,6 +148,15 @@ static const struct dmi_system_id asus_quirks[] = {
 	},
 	{
 		.callback = dmi_matched,
+		.ident = "ASUSTeK COMPUTER INC. X302UA",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "X302UA"),
+		},
+		.driver_data = &quirk_asus_wapf4,
+	},
+	{
+		.callback = dmi_matched,
 		.ident = "ASUSTeK COMPUTER INC. X401U",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
@@ -369,6 +382,15 @@ static const struct dmi_system_id asus_quirks[] = {
 	},
 	{
 		.callback = dmi_matched,
+		.ident = "ASUSTeK COMPUTER INC. UX330UAK",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "UX330UAK"),
+		},
+		.driver_data = &quirk_asus_ux330uak,
+	},
+	{
+		.callback = dmi_matched,
 		.ident = "ASUSTeK COMPUTER INC. X550LB",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 8fe5890bf539..6c7d86074b38 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -269,12 +269,10 @@ static int asus_wmi_input_init(struct asus_wmi *asus)
 
 	err = input_register_device(asus->inputdev);
 	if (err)
-		goto err_free_keymap;
+		goto err_free_dev;
 
 	return 0;
 
-err_free_keymap:
-	sparse_keymap_free(asus->inputdev);
 err_free_dev:
 	input_free_device(asus->inputdev);
 	return err;
@@ -282,10 +280,8 @@ err_free_dev:
 
 static void asus_wmi_input_exit(struct asus_wmi *asus)
 {
-	if (asus->inputdev) {
-		sparse_keymap_free(asus->inputdev);
+	if (asus->inputdev)
 		input_unregister_device(asus->inputdev);
-	}
 
 	asus->inputdev = NULL;
 }
@@ -1109,6 +1105,15 @@ static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
 }
 
 /*
+ * Some devices dont support or have borcken get_als method
+ * but still support set method.
+ */
+static void asus_wmi_set_als(void)
+{
+	asus_wmi_set_devstate(ASUS_WMI_DEVID_ALS_ENABLE, 1, NULL);
+}
+
+/*
  * Hwmon device
  */
 static int asus_hwmon_agfn_fan_speed_read(struct asus_wmi *asus, int fan,
@@ -1761,7 +1766,7 @@ ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
 ASUS_WMI_CREATE_DEVICE_ATTR(als_enable, 0644, ASUS_WMI_DEVID_ALS_ENABLE);
 
-static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
+static ssize_t cpufv_store(struct device *dev, struct device_attribute *attr,
 			   const char *buf, size_t count)
 {
 	int value, rv;
@@ -1778,7 +1783,7 @@ static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
 	return count;
 }
 
-static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
+static DEVICE_ATTR_WO(cpufv);
 
 static struct attribute *platform_attributes[] = {
 	&dev_attr_cpufv.attr,
@@ -2117,6 +2122,9 @@ static int asus_wmi_add(struct platform_device *pdev)
 			goto fail_rfkill;
 	}
 
+	if (asus->driver->quirks->wmi_force_als_set)
+		asus_wmi_set_als();
+
 	/* Some Asus desktop boards export an acpi-video backlight interface,
 	   stop this from showing up */
 	chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
diff --git a/drivers/platform/x86/asus-wmi.h b/drivers/platform/x86/asus-wmi.h
index c9589d9342bb..6c1311f4b04d 100644
--- a/drivers/platform/x86/asus-wmi.h
+++ b/drivers/platform/x86/asus-wmi.h
@@ -44,6 +44,7 @@ struct quirk_entry {
 	bool store_backlight_power;
 	bool wmi_backlight_power;
 	bool wmi_backlight_native;
+	bool wmi_force_als_set;
 	int wapf;
 	/*
 	 * For machines with AMD graphic chips, it will send out WMI event
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 2e237bad4995..ec202094bd50 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -45,6 +45,7 @@
 #define KBD_LED_AUTO_100_TOKEN 0x02F6
 #define GLOBAL_MIC_MUTE_ENABLE 0x0364
 #define GLOBAL_MIC_MUTE_DISABLE 0x0365
+#define KBD_LED_AC_TOKEN 0x0451
 
 struct quirk_entry {
 	u8 touchpad_led;
@@ -1027,7 +1028,7 @@ static void touchpad_led_exit(void)
  *     bit 2     Pointing stick
  *     bit 3     Any mouse
  *     bits 4-7  Reserved for future use
- *  cbRES2, byte3  Current Timeout
+ *  cbRES2, byte3  Current Timeout on battery
  *     bits 7:6  Timeout units indicator:
  *     00b       Seconds
  *     01b       Minutes
@@ -1039,6 +1040,15 @@ static void touchpad_led_exit(void)
  *  cbRES3, byte0  Current setting of ALS value that turns the light on or off.
  *  cbRES3, byte1  Current ALS reading
  *  cbRES3, byte2  Current keyboard light level.
+ *  cbRES3, byte3  Current timeout on AC Power
+ *     bits 7:6  Timeout units indicator:
+ *     00b       Seconds
+ *     01b       Minutes
+ *     10b       Hours
+ *     11b       Days
+ *     Bits 5:0  Timeout value (0-63) in sec/min/hr/day
+ *     NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte2
+ *     are set upon return from the upon return from the [Get Feature information] call.
  *
  * cbArg1 0x2 = Set New State
  *  cbRES1         Standard return codes (0, -1, -2)
@@ -1061,7 +1071,7 @@ static void touchpad_led_exit(void)
  *     bit 2     Pointing stick
  *     bit 3     Any mouse
  *     bits 4-7  Reserved for future use
- *  cbArg2, byte3  Desired Timeout
+ *  cbArg2, byte3  Desired Timeout on battery
  *     bits 7:6  Timeout units indicator:
  *     00b       Seconds
  *     01b       Minutes
@@ -1070,6 +1080,13 @@ static void touchpad_led_exit(void)
  *     bits 5:0  Timeout value (0-63) in sec/min/hr/day
  *  cbArg3, byte0  Desired setting of ALS value that turns the light on or off.
  *  cbArg3, byte2  Desired keyboard light level.
+ *  cbArg3, byte3  Desired Timeout on AC power
+ *     bits 7:6  Timeout units indicator:
+ *     00b       Seconds
+ *     01b       Minutes
+ *     10b       Hours
+ *     11b       Days
+ *     bits 5:0  Timeout value (0-63) in sec/min/hr/day
  */
 
 
@@ -1115,6 +1132,8 @@ struct kbd_state {
 	u8 triggers;
 	u8 timeout_value;
 	u8 timeout_unit;
+	u8 timeout_value_ac;
+	u8 timeout_unit_ac;
 	u8 als_setting;
 	u8 als_value;
 	u8 level;
@@ -1134,6 +1153,7 @@ static u16 kbd_token_bits;
 static struct kbd_info kbd_info;
 static bool kbd_als_supported;
 static bool kbd_triggers_supported;
+static bool kbd_timeout_ac_supported;
 
 static u8 kbd_mode_levels[16];
 static int kbd_mode_levels_count;
@@ -1142,6 +1162,7 @@ static u8 kbd_previous_level;
 static u8 kbd_previous_mode_bit;
 
 static bool kbd_led_present;
+static DEFINE_MUTEX(kbd_led_mutex);
 
 /*
  * NOTE: there are three ways to set the keyboard backlight level.
@@ -1272,6 +1293,8 @@ static int kbd_get_state(struct kbd_state *state)
 	state->als_setting = buffer->output[2] & 0xFF;
 	state->als_value = (buffer->output[2] >> 8) & 0xFF;
 	state->level = (buffer->output[2] >> 16) & 0xFF;
+	state->timeout_value_ac = (buffer->output[2] >> 24) & 0x3F;
+	state->timeout_unit_ac = (buffer->output[2] >> 30) & 0x3;
 
  out:
 	dell_smbios_release_buffer();
@@ -1291,6 +1314,8 @@ static int kbd_set_state(struct kbd_state *state)
 	buffer->input[1] |= (state->timeout_unit & 0x3) << 30;
 	buffer->input[2] = state->als_setting & 0xFF;
 	buffer->input[2] |= (state->level & 0xFF) << 16;
+	buffer->input[2] |= (state->timeout_value_ac & 0x3F) << 24;
+	buffer->input[2] |= (state->timeout_unit_ac & 0x3) << 30;
 	dell_smbios_send_request(4, 11);
 	ret = buffer->output[0];
 	dell_smbios_release_buffer();
@@ -1397,6 +1422,13 @@ static inline int kbd_init_info(void)
 	if (ret)
 		return ret;
 
+	/* NOTE: Old models without KBD_LED_AC_TOKEN token supports only one
+	 *       timeout value which is shared for both battery and AC power
+	 *       settings. So do not try to set AC values on old models.
+	 */
+	if (dell_smbios_find_token(KBD_LED_AC_TOKEN))
+		kbd_timeout_ac_supported = true;
+
 	kbd_get_state(&state);
 
 	/* NOTE: timeout value is stored in 6 bits so max value is 63 */
@@ -1571,35 +1603,56 @@ static ssize_t kbd_led_timeout_store(struct device *dev,
 		}
 	}
 
+	mutex_lock(&kbd_led_mutex);
+
 	ret = kbd_get_state(&state);
 	if (ret)
-		return ret;
+		goto out;
 
 	new_state = state;
-	new_state.timeout_value = value;
-	new_state.timeout_unit = unit;
+
+	if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
+		new_state.timeout_value_ac = value;
+		new_state.timeout_unit_ac = unit;
+	} else {
+		new_state.timeout_value = value;
+		new_state.timeout_unit = unit;
+	}
 
 	ret = kbd_set_state_safe(&new_state, &state);
 	if (ret)
-		return ret;
+		goto out;
 
-	return count;
+	ret = count;
+out:
+	mutex_unlock(&kbd_led_mutex);
+	return ret;
 }
 
 static ssize_t kbd_led_timeout_show(struct device *dev,
 				    struct device_attribute *attr, char *buf)
 {
 	struct kbd_state state;
+	int value;
 	int ret;
 	int len;
+	u8 unit;
 
 	ret = kbd_get_state(&state);
 	if (ret)
 		return ret;
 
-	len = sprintf(buf, "%d", state.timeout_value);
+	if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
+		value = state.timeout_value_ac;
+		unit = state.timeout_unit_ac;
+	} else {
+		value = state.timeout_value;
+		unit = state.timeout_unit;
+	}
+
+	len = sprintf(buf, "%d", value);
 
-	switch (state.timeout_unit) {
+	switch (unit) {
 	case KBD_TIMEOUT_SECONDS:
 		return len + sprintf(buf+len, "s\n");
 	case KBD_TIMEOUT_MINUTES:
@@ -1643,9 +1696,11 @@ static ssize_t kbd_led_triggers_store(struct device *dev,
 	if (trigger[0] != '+' && trigger[0] != '-')
 		return -EINVAL;
 
+	mutex_lock(&kbd_led_mutex);
+
 	ret = kbd_get_state(&state);
 	if (ret)
-		return ret;
+		goto out;
 
 	if (kbd_triggers_supported)
 		triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
@@ -1659,48 +1714,62 @@ static ssize_t kbd_led_triggers_store(struct device *dev,
 			if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
 				continue;
 			if (trigger[0] == '+' &&
-			    triggers_enabled && (state.triggers & BIT(i)))
-				return count;
+			    triggers_enabled && (state.triggers & BIT(i))) {
+				ret = count;
+				goto out;
+			}
 			if (trigger[0] == '-' &&
-			    (!triggers_enabled || !(state.triggers & BIT(i))))
-				return count;
+			    (!triggers_enabled || !(state.triggers & BIT(i)))) {
+				ret = count;
+				goto out;
+			}
 			trigger_bit = i;
 			break;
 		}
 	}
 
-	if (trigger_bit != -1) {
-		new_state = state;
-		if (trigger[0] == '+')
-			new_state.triggers |= BIT(trigger_bit);
-		else {
-			new_state.triggers &= ~BIT(trigger_bit);
-			/* NOTE: trackstick bit (2) must be disabled when
-			 *       disabling touchpad bit (1), otherwise touchpad
-			 *       bit (1) will not be disabled */
-			if (trigger_bit == 1)
-				new_state.triggers &= ~BIT(2);
-		}
-		if ((kbd_info.triggers & new_state.triggers) !=
-		    new_state.triggers)
-			return -EINVAL;
-		if (new_state.triggers && !triggers_enabled) {
-			new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
-			kbd_set_level(&new_state, kbd_previous_level);
-		} else if (new_state.triggers == 0) {
-			kbd_set_level(&new_state, 0);
-		}
-		if (!(kbd_info.modes & BIT(new_state.mode_bit)))
-			return -EINVAL;
-		ret = kbd_set_state_safe(&new_state, &state);
-		if (ret)
-			return ret;
-		if (new_state.mode_bit != KBD_MODE_BIT_OFF)
-			kbd_previous_mode_bit = new_state.mode_bit;
-		return count;
+	if (trigger_bit == -1) {
+		ret = -EINVAL;
+		goto out;
 	}
 
-	return -EINVAL;
+	new_state = state;
+	if (trigger[0] == '+')
+		new_state.triggers |= BIT(trigger_bit);
+	else {
+		new_state.triggers &= ~BIT(trigger_bit);
+		/*
+		 * NOTE: trackstick bit (2) must be disabled when
+		 *       disabling touchpad bit (1), otherwise touchpad
+		 *       bit (1) will not be disabled
+		 */
+		if (trigger_bit == 1)
+			new_state.triggers &= ~BIT(2);
+	}
+	if ((kbd_info.triggers & new_state.triggers) !=
+	    new_state.triggers) {
+		ret = -EINVAL;
+		goto out;
+	}
+	if (new_state.triggers && !triggers_enabled) {
+		new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
+		kbd_set_level(&new_state, kbd_previous_level);
+	} else if (new_state.triggers == 0) {
+		kbd_set_level(&new_state, 0);
+	}
+	if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
+		ret = -EINVAL;
+		goto out;
+	}
+	ret = kbd_set_state_safe(&new_state, &state);
+	if (ret)
+		goto out;
+	if (new_state.mode_bit != KBD_MODE_BIT_OFF)
+		kbd_previous_mode_bit = new_state.mode_bit;
+	ret = count;
+out:
+	mutex_unlock(&kbd_led_mutex);
+	return ret;
 }
 
 static ssize_t kbd_led_triggers_show(struct device *dev,
@@ -1757,12 +1826,16 @@ static ssize_t kbd_led_als_enabled_store(struct device *dev,
 	if (ret)
 		return ret;
 
+	mutex_lock(&kbd_led_mutex);
+
 	ret = kbd_get_state(&state);
 	if (ret)
-		return ret;
+		goto out;
 
-	if (enable == kbd_is_als_mode_bit(state.mode_bit))
-		return count;
+	if (enable == kbd_is_als_mode_bit(state.mode_bit)) {
+		ret = count;
+		goto out;
+	}
 
 	new_state = state;
 
@@ -1782,15 +1855,20 @@ static ssize_t kbd_led_als_enabled_store(struct device *dev,
 			new_state.mode_bit = KBD_MODE_BIT_ON;
 		}
 	}
-	if (!(kbd_info.modes & BIT(new_state.mode_bit)))
-		return -EINVAL;
+	if (!(kbd_info.modes & BIT(new_state.mode_bit)))  {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	ret = kbd_set_state_safe(&new_state, &state);
 	if (ret)
-		return ret;
+		goto out;
 	kbd_previous_mode_bit = new_state.mode_bit;
 
-	return count;
+	ret = count;
+out:
+	mutex_unlock(&kbd_led_mutex);
+	return ret;
 }
 
 static ssize_t kbd_led_als_enabled_show(struct device *dev,
@@ -1825,18 +1903,23 @@ static ssize_t kbd_led_als_setting_store(struct device *dev,
 	if (ret)
 		return ret;
 
+	mutex_lock(&kbd_led_mutex);
+
 	ret = kbd_get_state(&state);
 	if (ret)
-		return ret;
+		goto out;
 
 	new_state = state;
 	new_state.als_setting = setting;
 
 	ret = kbd_set_state_safe(&new_state, &state);
 	if (ret)
-		return ret;
+		goto out;
 
-	return count;
+	ret = count;
+out:
+	mutex_unlock(&kbd_led_mutex);
+	return ret;
 }
 
 static ssize_t kbd_led_als_setting_show(struct device *dev,
@@ -1921,31 +2004,37 @@ static int kbd_led_level_set(struct led_classdev *led_cdev,
 	u16 num;
 	int ret;
 
+	mutex_lock(&kbd_led_mutex);
+
 	if (kbd_get_max_level()) {
 		ret = kbd_get_state(&state);
 		if (ret)
-			return ret;
+			goto out;
 		new_state = state;
 		ret = kbd_set_level(&new_state, value);
 		if (ret)
-			return ret;
-		return kbd_set_state_safe(&new_state, &state);
-	}
-
-	if (kbd_get_valid_token_counts()) {
+			goto out;
+		ret = kbd_set_state_safe(&new_state, &state);
+	} else if (kbd_get_valid_token_counts()) {
 		for (num = kbd_token_bits; num != 0 && value > 0; --value)
 			num &= num - 1; /* clear the first bit set */
 		if (num == 0)
-			return 0;
-		return kbd_set_token_bit(ffs(num) - 1);
+			ret = 0;
+		else
+			ret = kbd_set_token_bit(ffs(num) - 1);
+	} else {
+		pr_warn("Keyboard brightness level control not supported\n");
+		ret = -ENXIO;
 	}
 
-	pr_warn("Keyboard brightness level control not supported\n");
-	return -ENXIO;
+out:
+	mutex_unlock(&kbd_led_mutex);
+	return ret;
 }