Merge tag 'leds_for_4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds

Pull LED updates from Jacek Anaszewski:
 "In this merge window we'd like to announce a change on the list of LED
  subsystem maintainers - Bryan Wu decided to step back and handed over
  the maintainership to me (Jacek Anaszewski), which entailed an update
  of LED subsystem git tree URL.

  Besides the changes in MAINTAINERS we have:

   - optimizations and improvements to existing LED class drivers

   - improvements to the common LEDs DT documentation

   - modifications of kirkwood-* dts files, to be in sync with patches
     for leds-ns2 driver, that move LEDs mode mapping outside of the
     driver"

* tag 'leds_for_4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
  leds: Export OF module alias information in missing drivers
  leds:lp55xx: use the private data instead of updating I2C device platform data
  leds: syscon: Correct check for syscon_node_to_regmap() errors
  leds: leds-fsg: Use devm_led_classdev_register
  MAINTAINERS: Change LED subsystem git tree URL
  leds/led-class: Add missing put_device()
  ARM: Kirkwood: add modes-map property to ns2-leds nodes
  leds: tlc591xx: Remove redundant I2C_FUNC_SMBUS_BYTE_DATA functionality check
  leds: leds-ns2: depends on MACH_ARMADA_370
  leds: leds-ns2: handle can_sleep GPIOs
  leds: leds-ns2: move LED modes mapping outside of the driver
  leds: lp8860: Constify reg_default tables
  leds: Drop owner assignment from i2c_driver
  leds: Allow compile test of LEDS_AAT1290 and LEDS_KTD2692 if !GPIOLIB
  leds: Allow compile test of GPIO consumers if !GPIOLIB
  DT: leds: Improve description of flash LEDs related properties

30 files changed, 240 insertions, 176 deletions

diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt
index 747c53805eec..68419843e32f 100644
--- a/Documentation/devicetree/bindings/leds/common.txt
+++ b/Documentation/devicetree/bindings/leds/common.txt
@@ -29,14 +29,23 @@ Optional properties for child nodes:
      "ide-disk" - LED indicates disk activity
      "timer" - LED flashes at a fixed, configurable rate
 
-- max-microamp : maximum intensity in microamperes of the LED
-		 (torch LED for flash devices)
-- flash-max-microamp : maximum intensity in microamperes of the
-                       flash LED; it is mandatory if the LED should
-		       support the flash mode
-- flash-timeout-us : timeout in microseconds after which the flash
-                     LED is turned off
+- led-max-microamp : Maximum LED supply current in microamperes. This property
+                     can be made mandatory for the board configurations
+                     introducing a risk of hardware damage in case an excessive
+                     current is set.
+                     For flash LED controllers with configurable current this
+                     property is mandatory for the LEDs in the non-flash modes
+                     (e.g. torch or indicator).
 
+Required properties for flash LED child nodes:
+- flash-max-microamp : Maximum flash LED supply current in microamperes.
+- flash-max-timeout-us : Maximum timeout in microseconds after which the flash
+                         LED is turned off.
+
+For controllers that have no configurable current the flash-max-microamp
+property can be omitted.
+For controllers that have no configurable timeout the flash-max-timeout-us
+property can be omitted.
 
 Examples:
 
@@ -49,7 +58,7 @@ system-status {
 camera-flash {
 	label = "Flash";
 	led-sources = <0>, <1>;
-	max-microamp = <50000>;
+	led-max-microamp = <50000>;
 	flash-max-microamp = <320000>;
-	flash-timeout-us = <500000>;
+	flash-max-timeout-us = <500000>;
 };
diff --git a/Documentation/devicetree/bindings/leds/leds-ns2.txt b/Documentation/devicetree/bindings/leds/leds-ns2.txt
index aef3aca34d2d..9f81258a5b6e 100644
--- a/Documentation/devicetree/bindings/leds/leds-ns2.txt
+++ b/Documentation/devicetree/bindings/leds/leds-ns2.txt
@@ -8,6 +8,9 @@ Each LED is represented as a sub-node of the ns2-leds device.
 Required sub-node properties:
 - cmd-gpio: Command LED GPIO. See OF device-tree GPIO specification.
 - slow-gpio: Slow LED GPIO. See OF device-tree GPIO specification.
+- modes-map: A mapping between LED modes (off, on or SATA activity blinking) and
+  the corresponding cmd-gpio/slow-gpio values. All the GPIO values combinations
+  should be given in order to avoid having an unknown mode at driver probe time.
 
 Optional sub-node properties:
 - label: Name for this LED. If omitted, the label is taken from the node name.
@@ -15,6 +18,8 @@ Optional sub-node properties:
 
 Example:
 
+#include <dt-bindings/leds/leds-ns2.h>
+
 ns2-leds {
 	compatible = "lacie,ns2-leds";
 
@@ -22,5 +27,9 @@ ns2-leds {
 		label = "ns2:blue:sata";
 		slow-gpio = <&gpio0 29 0>;
 		cmd-gpio = <&gpio0 30 0>;
+		modes-map = <NS_V2_LED_OFF  0 1
+			     NS_V2_LED_ON   1 0
+			     NS_V2_LED_ON   0 0
+			     NS_V2_LED_SATA 1 1>;
 	};
 };
diff --git a/MAINTAINERS b/MAINTAINERS
index b41244b17775..cdcd9c5d3c0e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6042,11 +6042,10 @@ F:	Documentation/scsi/53c700.txt
 F:	drivers/scsi/53c700*
 
 LED SUBSYSTEM
-M:	Bryan Wu <cooloney@gmail.com>
 M:	Richard Purdie <rpurdie@rpsys.net>
 M:	Jacek Anaszewski <j.anaszewski@samsung.com>
 L:	linux-leds@vger.kernel.org
-T:	git git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds.git
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds.git
 S:	Maintained
 F:	drivers/leds/
 F:	include/linux/leds.h
diff --git a/arch/arm/boot/dts/kirkwood-d2net.dts b/arch/arm/boot/dts/kirkwood-d2net.dts
index 6b7856025001..e1c25c35e9ce 100644
--- a/arch/arm/boot/dts/kirkwood-d2net.dts
+++ b/arch/arm/boot/dts/kirkwood-d2net.dts
@@ -10,6 +10,7 @@
 
 /dts-v1/;
 
+#include <dt-bindings/leds/leds-ns2.h>
 #include "kirkwood-netxbig.dtsi"
 
 / {
@@ -28,6 +29,10 @@
 			label = "d2net_v2:blue:sata";
 			slow-gpio = <&gpio0 29 GPIO_ACTIVE_HIGH>;
 			cmd-gpio = <&gpio0 30 GPIO_ACTIVE_HIGH>;
+			modes-map = <NS_V2_LED_OFF  1 0
+				     NS_V2_LED_ON   0 1
+				     NS_V2_LED_ON   1 1
+				     NS_V2_LED_SATA 0 0>;
 		};
 	};
 
diff --git a/arch/arm/boot/dts/kirkwood-is2.dts b/arch/arm/boot/dts/kirkwood-is2.dts
index da674bbd49a8..4121674abd1c 100644
--- a/arch/arm/boot/dts/kirkwood-is2.dts
+++ b/arch/arm/boot/dts/kirkwood-is2.dts
@@ -1,5 +1,6 @@
 /dts-v1/;
 
+#include <dt-bindings/leds/leds-ns2.h>
 #include "kirkwood-ns2-common.dtsi"
 
 / {
@@ -27,6 +28,10 @@
 			label = "ns2:blue:sata";
 			slow-gpio = <&gpio0 29 0>;
 			cmd-gpio = <&gpio0 30 0>;
+			modes-map = <NS_V2_LED_OFF  1 0
+				     NS_V2_LED_ON   0 1
+				     NS_V2_LED_ON   1 1
+				     NS_V2_LED_SATA 0 0>;
 		};
 	};
 };
diff --git a/arch/arm/boot/dts/kirkwood-ns2.dts b/arch/arm/boot/dts/kirkwood-ns2.dts
index 53368d1022cc..190189d235e6 100644
--- a/arch/arm/boot/dts/kirkwood-ns2.dts
+++ b/arch/arm/boot/dts/kirkwood-ns2.dts
@@ -1,5 +1,6 @@
 /dts-v1/;
 
+#include <dt-bindings/leds/leds-ns2.h>
 #include "kirkwood-ns2-common.dtsi"
 
 / {
@@ -27,6 +28,10 @@
 			label = "ns2:blue:sata";
 			slow-gpio = <&gpio0 29 0>;
 			cmd-gpio = <&gpio0 30 0>;
+			modes-map = <NS_V2_LED_OFF  1 0
+				     NS_V2_LED_ON   0 1
+				     NS_V2_LED_ON   1 1
+				     NS_V2_LED_SATA 0 0>;
 		};
 	};
 };
diff --git a/arch/arm/boot/dts/kirkwood-ns2max.dts b/arch/arm/boot/dts/kirkwood-ns2max.dts
index 72c78d0b1116..55cc41d9c80c 100644
--- a/arch/arm/boot/dts/kirkwood-ns2max.dts
+++ b/arch/arm/boot/dts/kirkwood-ns2max.dts
@@ -1,5 +1,6 @@
 /dts-v1/;
 
+#include <dt-bindings/leds/leds-ns2.h>
 #include "kirkwood-ns2-common.dtsi"
 
 / {
@@ -46,6 +47,10 @@
 			label = "ns2:blue:sata";
 			slow-gpio = <&gpio0 29 0>;
 			cmd-gpio = <&gpio0 30 0>;
+			modes-map = <NS_V2_LED_OFF  1 0
+				     NS_V2_LED_ON   0 1
+				     NS_V2_LED_ON   1 1
+				     NS_V2_LED_SATA 0 0>;
 		};
 	};
 };
diff --git a/arch/arm/boot/dts/kirkwood-ns2mini.dts b/arch/arm/boot/dts/kirkwood-ns2mini.dts
index c441bf62c09f..9935f3ec29b4 100644
--- a/arch/arm/boot/dts/kirkwood-ns2mini.dts
+++ b/arch/arm/boot/dts/kirkwood-ns2mini.dts
@@ -1,5 +1,6 @@
 /dts-v1/;
 
+#include <dt-bindings/leds/leds-ns2.h>
 #include "kirkwood-ns2-common.dtsi"
 
 / {
@@ -47,6 +48,10 @@
 			label = "ns2:blue:sata";
 			slow-gpio = <&gpio0 29 0>;
 			cmd-gpio = <&gpio0 30 0>;
+			modes-map = <NS_V2_LED_OFF  1 0
+				     NS_V2_LED_ON   0 1
+				     NS_V2_LED_ON   1 1
+				     NS_V2_LED_SATA 0 0>;
 		};
 	};
 };
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 9ad35f72ab4c..23408bd68fdc 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -43,7 +43,7 @@ config LEDS_AAT1290
 	tristate "LED support for the AAT1290"
 	depends on LEDS_CLASS_FLASH
 	depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
-	depends on GPIOLIB
+	depends on GPIOLIB || COMPILE_TEST
 	depends on OF
 	depends on PINCTRL
 	help
@@ -419,7 +419,7 @@ config LEDS_INTEL_SS4200
 config LEDS_LT3593
 	tristate "LED driver for LT3593 controllers"
 	depends on LEDS_CLASS
-	depends on GPIOLIB
+	depends on GPIOLIB || COMPILE_TEST
 	help
 	  This option enables support for LEDs driven by a Linear Technology
 	  LT3593 controller. This controller uses a special one-wire pulse
@@ -455,12 +455,16 @@ config LEDS_MC13783
 config LEDS_NS2
 	tristate "LED support for Network Space v2 GPIO LEDs"
 	depends on LEDS_CLASS
-	depends on MACH_KIRKWOOD
+	depends on MACH_KIRKWOOD || MACH_ARMADA_370
 	default y
 	help
-	  This option enable support for the dual-GPIO LED found on the
-	  Network Space v2 board (and parents). This include Internet Space v2,
-	  Network Space (Max) v2 and d2 Network v2 boards.
+	  This option enables support for the dual-GPIO LEDs found on the
+	  following LaCie/Seagate boards:
+
+		Network Space v2 (and parents: Max, Mini)
+		Internet Space v2
+		d2 Network v2
+		n090401 (Seagate NAS 4-Bay)
 
 config LEDS_NETXBIG
 	tristate "LED support for Big Network series LEDs"
@@ -543,7 +547,8 @@ config LEDS_MENF21BMC
 
 config LEDS_KTD2692
 	tristate "LED support for KTD2692 flash LED controller"
-	depends on LEDS_CLASS_FLASH && GPIOLIB && OF
+	depends on LEDS_CLASS_FLASH && OF
+	depends on GPIOLIB || COMPILE_TEST
 	help
 	  This option enables support for KTD2692 LED flash connected
 	  through ExpressWire interface.
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index beabfbc6f7cd..ca51d58bed24 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -228,12 +228,15 @@ static int led_classdev_next_name(const char *init_name, char *name,
 {
 	unsigned int i = 0;
 	int ret = 0;
+	struct device *dev;
 
 	strlcpy(name, init_name, len);
 
-	while (class_find_device(leds_class, NULL, name, match_name) &&
-	       (ret < len))
+	while ((ret < len) &&
+	       (dev = class_find_device(leds_class, NULL, name, match_name))) {
+		put_device(dev);
 		ret = snprintf(name, len, "%s_%u", init_name, ++i);
+	}
 
 	if (ret >= len)
 		return -ENOMEM;
diff --git a/drivers/leds/leds-fsg.c b/drivers/leds/leds-fsg.c
index 2b4dc738dcd6..257a813c73f3 100644
--- a/drivers/leds/leds-fsg.c
+++ b/drivers/leds/leds-fsg.c
@@ -156,63 +156,35 @@ static int fsg_led_probe(struct platform_device *pdev)
 	latch_value = 0xffff;
 	*latch_address = latch_value;
 
-	ret = led_classdev_register(&pdev->dev, &fsg_wlan_led);
+	ret = devm_led_classdev_register(&pdev->dev, &fsg_wlan_led);
 	if (ret < 0)
-		goto failwlan;
+		return ret;
 
-	ret = led_classdev_register(&pdev->dev, &fsg_wan_led);
+	ret = devm_led_classdev_register(&pdev->dev, &fsg_wan_led);
 	if (ret < 0)
-		goto failwan;
+		return ret;
 
-	ret = led_classdev_register(&pdev->dev, &fsg_sata_led);
+	ret = devm_led_classdev_register(&pdev->dev, &fsg_sata_led);
 	if (ret < 0)
-		goto failsata;
+		return ret;
 
-	ret = led_classdev_register(&pdev->dev, &fsg_usb_led);
+	ret = devm_led_classdev_register(&pdev->dev, &fsg_usb_led);
 	if (ret < 0)
-		goto failusb;
+		return ret;
 
-	ret = led_classdev_register(&pdev->dev, &fsg_sync_led);
+	ret = devm_led_classdev_register(&pdev->dev, &fsg_sync_led);
 	if (ret < 0)
-		goto failsync;
+		return ret;
 
-	ret = led_classdev_register(&pdev->dev, &fsg_ring_led);
+	ret = devm_led_classdev_register(&pdev->dev, &fsg_ring_led);
 	if (ret < 0)
-		goto failring;
-
-	return ret;
-
- failring:
-	led_classdev_unregister(&fsg_sync_led);
- failsync:
-	led_classdev_unregister(&fsg_usb_led);
- failusb:
-	led_classdev_unregister(&fsg_sata_led);
- failsata:
-	led_classdev_unregister(&fsg_wan_led);
- failwan:
-	led_classdev_unregister(&fsg_wlan_led);
- failwlan:
+		return ret;
 
 	return ret;
 }
 
-static int fsg_led_remove(struct platform_device *pdev)
-{
-	led_classdev_unregister(&fsg_wlan_led);
-	led_classdev_unregister(&fsg_wan_led);
-	led_classdev_unregister(&fsg_sata_led);
-	led_classdev_unregister(&fsg_usb_led);
-	led_classdev_unregister(&fsg_sync_led);
-	led_classdev_unregister(&fsg_ring_led);
-
-	return 0;
-}
-
-
 static struct platform_driver fsg_led_driver = {
 	.probe		= fsg_led_probe,
-	.remove		= fsg_led_remove,
 	.driver		= {
 		.name		= "fsg-led",
 	},
diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c
index 91325de3cd33..b38430cb10ad 100644
--- a/drivers/leds/leds-lm3530.c
+++ b/drivers/leds/leds-lm3530.c
@@ -492,7 +492,6 @@ static struct i2c_driver lm3530_i2c_driver = {
 	.id_table = lm3530_id,
 	.driver = {
 		.name = LM3530_NAME,
-		.owner = THIS_MODULE,
 	},
 };
 
diff --git a/drivers/leds/leds-lm355x.c b/drivers/leds/leds-lm355x.c
index f5112cb2d991..48872997d6b4 100644
--- a/drivers/leds/leds-lm355x.c
+++ b/drivers/leds/leds-lm355x.c
@@ -555,7 +555,6 @@ MODULE_DEVICE_TABLE(i2c, lm355x_id);
 static struct i2c_driver lm355x_i2c_driver = {
 	.driver = {
 		   .name = LM355x_NAME,
-		   .owner = THIS_MODULE,
 		   .pm = NULL,
 		   },
 	.probe = lm355x_probe,
diff --git a/drivers/leds/leds-lm3642.c b/drivers/leds/leds-lm3642.c
index d3dec0132769..02ebe342f5af 100644
--- a/drivers/leds/leds-lm3642.c
+++ b/drivers/leds/leds-lm3642.c
@@ -446,7 +446,6 @@ MODULE_DEVICE_TABLE(i2c, lm3642_id);
 static struct i2c_driver lm3642_i2c_driver = {
 	.driver = {
 		   .name = LM3642_NAME,
-		   .owner = THIS_MODULE,
 		   .pm = NULL,
 		   },
 	.probe = lm3642_probe,
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 8ca197af2864..63a92542c8cb 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -514,20 +514,19 @@ static int lp5521_probe(struct i2c_client *client,
 	int ret;
 	struct lp55xx_chip *chip;
 	struct lp55xx_led *led;
-	struct lp55xx_platform_data *pdata;
+	struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
 	struct device_node *np = client->dev.of_node;
 
-	if (!dev_get_platdata(&client->dev)) {
+	if (!pdata) {
 		if (np) {
-			ret = lp55xx_of_populate_pdata(&client->dev, np);
-			if (ret < 0)
-				return ret;
+			pdata = lp55xx_of_populate_pdata(&client->dev, np);
+			if (IS_ERR(pdata))
+				return PTR_ERR(pdata);
 		} else {
 			dev_err(&client->dev, "no platform data\n");
 			return -EINVAL;
 		}
 	}
-	pdata = dev_get_platdata(&client->dev);
 
 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 	if (!chip)
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index 584dbbcec659..1d0187f42941 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -880,20 +880,19 @@ static int lp5523_probe(struct i2c_client *client,
 	int ret;
 	struct lp55xx_chip *chip;
 	struct lp55xx_led *led;
-	struct lp55xx_platform_data *pdata;
+	struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
 	struct device_node *np = client->dev.of_node;
 
-	if (!dev_get_platdata(&client->dev)) {
+	if (!pdata) {
 		if (np) {
-			ret = lp55xx_of_populate_pdata(&client->dev, np);
-			if (ret < 0)
-				return ret;
+			pdata = lp55xx_of_populate_pdata(&client->dev, np);
+			if (IS_ERR(pdata))
+				return PTR_ERR(pdata);
 		} else {
 			dev_err(&client->dev, "no platform data\n");
 			return -EINVAL;
 		}
 	}
-	pdata = dev_get_platdata(&client->dev);
 
 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 	if (!chip)
diff --git a/drivers/leds/leds-lp5562.c b/drivers/leds/leds-lp5562.c
index ca85724ab138..0360c59dbdc9 100644
--- a/drivers/leds/leds-lp5562.c
+++ b/drivers/leds/leds-lp5562.c
@@ -515,20 +515,19 @@ static int lp5562_probe(struct i2c_client *client,
 	int ret;
 	struct lp55xx_chip *chip;
 	struct lp55xx_led *led;
-	struct lp55xx_platform_data *pdata;
+	struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
 	struct device_node *np = client->dev.of_node;
 
-	if (!dev_get_platdata(&client->dev)) {
+	if (!pdata) {
 		if (np) {
-			ret = lp55xx_of_populate_pdata(&client->dev, np);
-			if (ret < 0)
-				return ret;
+			pdata = lp55xx_of_populate_pdata(&client->dev, np);
+			if (IS_ERR(pdata))
+				return PTR_ERR(pdata);
 		} else {
 			dev_err(&client->dev, "no platform data\n");
 			return -EINVAL;
 		}
 	}
-	pdata = dev_get_platdata(&client->dev);
 
 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 	if (!chip)
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index 96d51e9879c9..59b76833f0d3 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -543,7 +543,8 @@ void lp55xx_unregister_sysfs(struct lp55xx_chip *chip)
 }
 EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs);
 
-int lp55xx_of_populate_pdata(struct device *dev, struct device_node *np)
+struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
+						      struct device_node *np)
 {
 	struct device_node *child;
 	struct lp55xx_platform_data *pdata;
@@ -553,17 +554,17 @@ int lp55xx_of_populate_pdata(struct device *dev, struct device_node *np)
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	num_channels = of_get_child_count(np);
 	if (num_channels == 0) {
 		dev_err(dev, "no LED channels\n");
-		return -EINVAL;
+		return ERR_PTR(-EINVAL);
 	}
 
 	cfg = devm_kzalloc(dev, sizeof(*cfg) * num_channels, GFP_KERNEL);
 	if (!cfg)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	pdata->led_config = &cfg[0];
 	pdata->num_channels = num_channels;
@@ -588,9 +589,7 @@ int lp55xx_of_populate_pdata(struct device *dev, struct device_node *np)
 	/* LP8501 specific */
 	of_property_read_u8(np, "pwr-sel", (u8 *)&pdata->pwr_sel);
 
-	dev->platform_data = pdata;
-
-	return 0;
+	return pdata;
 }
 EXPORT_SYMBOL_GPL(lp55xx_of_populate_pdata);
 
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
index cceab483edd0..c7f1e6155001 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -202,7 +202,7 @@ extern int lp55xx_register_sysfs(struct lp55xx_chip *chip);
 extern void lp55xx_unregister_sysfs(struct lp55xx_chip *chip);
 
 /* common device tree population function */
-extern int lp55xx_of_populate_pdata(struct device *dev,
-				    struct device_node *np);
+extern struct lp55xx_platform_data
+*lp55xx_of_populate_pdata(struct device *dev, struct device_node *np);
 
 #endif /* _LEDS_LP55XX_COMMON_H */
diff --git a/drivers/leds/leds-lp8501.c b/drivers/leds/leds-lp8501.c
index d3098e395fff..3f54f6f2b821 100644
--- a/drivers/leds/leds-lp8501.c
+++ b/drivers/leds/leds-lp8501.c
@@ -308,20 +308,19 @@ static int lp8501_probe(struct i2c_client *client,
 	int ret;
 	struct lp55xx_chip *chip;
 	struct lp55xx_led *led;
-	struct lp55xx_platform_data *pdata;
+	struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
 	struct device_node *np = client->dev.of_node;
 
-	if (!dev_get_platdata(&client->dev)) {
+	if (!pdata) {
 		if (np) {
-			ret = lp55xx_of_populate_pdata(&client->dev, np);
-			if (ret < 0)
-				return ret;
+			pdata = lp55xx_of_populate_pdata(&client->dev, np);
+			if (IS_ERR(pdata))
+				return PTR_ERR(pdata);
 		} else {
 			dev_err(&client->dev, "no platform data\n");
 			return -EINVAL;
 		}
 	}
-	pdata = dev_get_platdata(&client->dev);
 
 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 	if (!chip)
diff --git a/drivers/leds/leds-lp8860.c b/drivers/leds/leds-lp8860.c
index 8c2b7fbe2392..79f084354e67 100644
--- a/drivers/leds/leds-lp8860.c
+++ b/drivers/leds/leds-lp8860.c
@@ -302,7 +302,7 @@ out:
 	return ret;
 }
 
-static struct reg_default lp8860_reg_defs[] = {
+static const struct reg_default lp8860_reg_defs[] = {
 	{ LP8860_DISP_CL1_BRT_MSB, 0x00},
 	{ LP8860_DISP_CL1_BRT_LSB, 0x00},
 	{ LP8860_DISP_CL1_CURR_MSB, 0x00},
@@ -332,7 +332,7 @@ static const struct regmap_config lp8860_regmap_config = {
 	.cache_type = REGCACHE_NONE,
 };
 
-static struct reg_default lp8860_eeprom_defs[] = {
+static const struct reg_default lp8860_eeprom_defs[] = {
 	{ LP8860_EEPROM_REG_0, 0x00 },
 	{ LP8860_EEPROM_REG_1, 0x00 },
 	{ LP8860_EEPROM_REG_2, 0x00 },
diff --git a/drivers/leds/leds-ns2.c b/drivers/leds/leds-ns2.c
index 1fd6adbb43b7..b33514d9f427 100644
--- a/drivers/leds/leds-ns2.c
+++ b/drivers/leds/leds-ns2.c
@@ -31,50 +31,38 @@
 #include <linux/platform_data/leds-kirkwood-ns2.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
+#include "leds.h"
 
 /*
- * The Network Space v2 dual-GPIO LED is wired to a CPLD and can blink in
- * relation with the SATA activity. This capability is exposed through the
- * "sata" sysfs attribute.
- *
- * The following array detail the different LED registers and the combination
- * of their possible values:
- *
- *  cmd_led   |  slow_led  | /SATA active | LED state
- *            |            |              |
- *     1      |     0      |      x       |  off
- *     -      |     1      |      x       |  on
- *     0      |     0      |      1       |  on
- *     0      |     0      |      0       |  blink (rate 300ms)
+ * The Network Space v2 dual-GPIO LED is wired to a CPLD. Three different LED
+ * modes are available: off, on and SATA activity blinking. The LED modes are
+ * controlled through two GPIOs (command and slow): each combination of values
+ * for the command/slow GPIOs corresponds to a LED mode.
  */
 
-enum ns2_led_modes {
-	NS_V2_LED_OFF,
-	NS_V2_LED_ON,
-	NS_V2_LED_SATA,
-};
-
-struct ns2_led_mode_value {
-	enum ns2_led_modes	mode;
-	int			cmd_level;
-	int			slow_level;
-};
-
-static struct ns2_led_mode_value ns2_led_modval[] = {
-	{ NS_V2_LED_OFF	, 1, 0 },
-	{ NS_V2_LED_ON	, 0, 1 },
-	{ NS_V2_LED_ON	, 1, 1 },
-	{ NS_V2_LED_SATA, 0, 0 },
-};
-
 struct ns2_led_data {
 	struct led_classdev	cdev;
 	unsigned		cmd;
 	unsigned		slow;
+	bool			can_sleep;
+	int			mode_index;
 	unsigned char		sata; /* True when SATA mode active. */
 	rwlock_t		rw_lock; /* Lock GPIOs. */
+	struct work_struct	work;
+	int			num_modes;
+	struct ns2_led_modval	*modval;
 };
 
+static void ns2_led_work(struct work_struct *work)
+{
+	struct ns2_led_data *led_dat =
+		container_of(work, struct ns2_led_data, work);
+	int i = led_dat->mode_index;
+
+	gpio_set_value_cansleep(led_dat->cmd, led_dat->modval[i].cmd_level);
+	gpio_set_value_cansleep(led_dat->slow, led_dat->modval[i].slow_level);
+}
+
 static int ns2_led_get_mode(struct ns2_led_data *led_dat,
 			    enum ns2_led_modes *mode)
 {
@@ -83,22 +71,18 @@ static int ns2_led_get_mode(struct ns2_led_data *led_dat,
 	int cmd_level;
 	int slow_level;
 
-	read_lock_irq(&led_dat->rw_lock);
+	cmd_level = gpio_get_value_cansleep(led_dat->cmd);
+	slow_level = gpio_get_value_cansleep(led_dat->slow);
 
-	cmd_level = gpio_get_value(led_dat->cmd);
-	slow_level = gpio_get_value(led_dat->slow);
-
-	for (i = 0; i < ARRAY_SIZE(ns2_led_modval); i++) {
-		if (cmd_level == ns2_led_modval[i].cmd_level &&
-		    slow_level == ns2_led_modval[i].slow_level) {
-			*mode = ns2_led_modval[i].mode;
+	for (i = 0; i < led_dat->num_modes; i++) {
+		if (cmd_level == led_dat->modval[i].cmd_level &&
+		    slow_level == led_dat->modval[i].slow_level) {
+			*mode = led_dat->modval[i].mode;
 			ret = 0;
 			break;
 		}
 	}
 
-	read_unlock_irq(&led_dat->rw_lock);
-
 	return ret;
 }
 
@@ -106,19 +90,32 @@ static void ns2_led_set_mode(struct ns2_led_data *led_dat,
 			     enum ns2_led_modes mode)
 {
 	int i;
+	bool found = false;
 	unsigned long flags;
 
+	for (i = 0; i < led_dat->num_modes; i++)
+		if (mode == led_dat->modval[i].mode) {
+			found = true;
+			break;
+		}
+
+	if (!found)
+		return;
+
 	write_lock_irqsave(&led_dat->rw_lock, flags);
 
-	for (i = 0; i < ARRAY_SIZE(ns2_led_modval); i++) {
-		if (mode == ns2_led_modval[i].mode) {
-			gpio_set_value(led_dat->cmd,
-				       ns2_led_modval[i].cmd_level);
-			gpio_set_value(led_dat->slow,
-				       ns2_led_modval[i].slow_level);
-		}
+	if (!led_dat->can_sleep) {
+		gpio_set_value(led_dat->cmd,
+			       led_dat->modval[i].cmd_level);
+		gpio_set_value(led_dat->slow,
+			       led_dat->modval[i].slow_level);
+		goto exit_unlock;
 	}
 
+	led_dat->mode_index = i;
+	schedule_work(&led_dat->work);
+
+exit_unlock:
 	write_unlock_irqrestore(&led_dat->rw_lock, flags);
 }
 
@@ -148,7 +145,6 @@ static ssize_t ns2_led_sata_store(struct device *dev,
 		container_of(led_cdev, struct ns2_led_data, cdev);
 	int ret;
 	unsigned long enable;
-	enum ns2_led_modes mode;
 
 	ret = kstrtoul(buff, 10, &enable);
 	if (ret < 0)
@@ -157,19 +153,19 @@ static ssize_t ns2_led_sata_store(struct device *dev,
 	enable = !!enable;
 
 	if (led_dat->sata == enable)
-		return count;
+		goto exit;
 
-	ret = ns2_led_get_mode(led_dat, &mode);
-	if (ret < 0)
-		return ret;
+	led_dat->sata = enable;
+
+	if (!led_get_brightness(led_cdev))
+		goto exit;
 
-	if (enable && mode == NS_V2_LED_ON)
+	if (enable)
 		ns2_led_set_mode(led_dat, NS_V2_LED_SATA);
-	if (!enable && mode == NS_V2_LED_SATA)
+	else
 		ns2_led_set_mode(led_dat, NS_V2_LED_ON);
 
-	led_dat->sata = enable;
-
+exit:
 	return count;
 }
 
@@ -199,7 +195,7 @@ create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat,
 	enum ns2_led_modes mode;
 
 	ret = devm_gpio_request_one(&pdev->dev, template->cmd,
-			gpio_get_value(template->cmd) ?
+			gpio_get_value_cansleep(template->cmd) ?
 			GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
 			template->name);
 	if (ret) {
@@ -209,7 +205,7 @@ create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat,
 	}
 
 	ret = devm_gpio_request_one(&pdev->dev, template->slow,
-			gpio_get_value(template->slow) ?
+			gpio_get_value_cansleep(template->slow) ?
 			GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
 			template->name);
 	if (ret) {
@@ -228,6 +224,10 @@ create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat,
 	led_dat->cdev.groups = ns2_led_groups;
 	led_dat->cmd = template->cmd;
 	led_dat->slow = template->slow;
+	led_dat->can_sleep = gpio_cansleep(led_dat->cmd) |
+				gpio_cansleep(led_dat->slow);
+	led_dat->modval = template->modval;
+	led_dat->num_modes = template->num_modes;
 
 	ret = ns2_led_get_mode(led_dat, &mode);
 	if (ret < 0)
@@ -238,6 +238,8 @@ create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat,
 	led_dat->cdev.brightness =
 		(mode == NS_V2_LED_OFF) ? LED_OFF : LED_FULL;
 
+	INIT_WORK(&led_dat->work, ns2_led_work);
+
 	ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
 	if (ret < 0)
 		return ret;
@@ -248,6 +250,7 @@ create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat,
 static void delete_ns2_led(struct ns2_led_data *led_dat)
 {
 	led_classdev_unregister(&led_dat->cdev);
+	cancel_work_sync(&led_dat->work);
 }
 
 #ifdef CONFIG_OF_GPIO
@@ -259,9 +262,8 @@ ns2_leds_get_of_pdata(struct device *dev, struct ns2_led_platform_data *pdata)
 {
 	struct device_node *np = dev->of_node;
 	struct device_node *child;
-	struct ns2_led *leds;
+	struct ns2_led *led, *leds;
 	int num_leds = 0;
-	int i = 0;
 
 	num_leds = of_get_child_count(np);
 	if (!num_leds)
@@ -272,26 +274,57 @@ ns2_leds_get_of_pdata(struct device *dev, struct ns2_led_platform_data *pdata)
 	if (!leds)
 		return -ENOMEM;
 
+	led = leds;
 	for_each_child_of_node(np, child) {
 		const char *string;
-		int ret;
+		int ret, i, num_modes;
+		struct ns2_led_modval *modval;
 
 		ret = of_get_named_gpio(child, "cmd-gpio", 0);
 		if (ret < 0)
 			return ret;
-		leds[i].cmd = ret;
+		led->cmd = ret;
 		ret = of_get_named_gpio(child, "slow-gpio", 0);
 		if (ret < 0)
 			return ret;
-		leds[i].slow = ret;
+		led->slow = ret;
 		ret = of_property_read_string(child, "label", &string);
-		leds[i].name = (ret == 0) ? string : child->name;
+		led->name = (ret == 0) ? string : child->name;
 		ret = of_property_read_string(child, "linux,default-trigger",
 					      &string);
 		if (ret == 0)
-			leds[i].default_trigger = string;
+			led->default_trigger = string;
+
+		ret = of_property_count_u32_elems(child, "modes-map");
+		if (ret < 0 || ret % 3) {
+			dev_err(dev,
+				"Missing or malformed modes-map property\n");
+			return -EINVAL;
+		}
+
+		num_modes = ret / 3;
+		modval = devm_kzalloc(dev,
+				      num_modes * sizeof(struct ns2_led_modval),
+				      GFP_KERNEL);
+		if (!modval)
+			return -ENOMEM;
+
+		for (i = 0; i < num_modes; i++) {
+			of_property_read_u32_index(child,
+						"modes-map", 3 * i,
+						(u32 *) &modval[i].mode);
+			of_property_read_u32_index(child,
+						"modes-map", 3 * i + 1,
+						(u32 *) &modval[i].cmd_level);
+			of_property_read_u32_index(child,
+						"modes-map", 3 * i + 2,
+						(u32 *) &modval[i].slow_level);
+		}
+
+		led->num_modes = num_modes;
+		led->modval = modval;
 
-		i++;
+		led++;
 	}
 
 	pdata->leds = leds;
diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index c3a08b60535b..b775e1efecd3 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -379,7 +379,6 @@ static int pca955x_remove(struct i2c_client *client)
 static struct i2c_driver pca955x_driver = {
 	.driver = {
 		.name	= "leds-pca955x",
-		.owner	= THIS_MODULE,
 	},
 	.probe	= pca955x_probe,
 	.remove	= pca955x_remove,
diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c
index bee3e1ab27fd..41f269fe0920 100644
--- a/drivers/leds/leds-pca963x.c
+++ b/drivers/leds/leds-pca963x.c
@@ -332,6 +332,7 @@ static const struct of_device_id of_pca963x_match[] = {
 	{ .compatible = "nxp,pca9635", },
 	{},
 };
+MODULE_DEVICE_TABLE(of, of_pca963x_match);
 #else
 static struct pca963x_platform_data *
 pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
@@ -458,7 +459,6 @@ static int pca963x_remove(struct i2c_client *client)
 static struct i2c_driver pca963x_driver = {
 	.driver = {
 		.name	= "leds-pca963x",
-		.owner	= THIS_MODULE,
 		.of_match_table = of_match_ptr(of_pca963x_match),
 	},
 	.probe	= pca963x_probe,
diff --git a/drivers/leds/leds-syscon.c b/drivers/leds/leds-syscon.c
index d1660b039812..b88900d721e4 100644
--- a/drivers/leds/leds-syscon.c
+++ b/drivers/leds/leds-syscon.c
@@ -83,9 +83,9 @@ static int syscon_led_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 	map = syscon_node_to_regmap(parent->of_node);
-	if (!map) {
+	if (IS_ERR(map)) {
 		dev_err(dev, "no regmap for syscon LED parent\n");
-		return -ENODEV;
+		return PTR_ERR(map);
 	}
 
 	sled = devm_kzalloc(dev, sizeof(*sled), GFP_KERNEL);
diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c
index 20fa8e77f186..edbecc4ca2da 100644
--- a/drivers/leds/leds-tca6507.c
+++ b/drivers/leds/leds-tca6507.c
@@ -735,6 +735,7 @@ static const struct of_device_id of_tca6507_leds_match[] = {
 	{ .compatible = "ti,tca6507", },
 	{},
 };
+MODULE_DEVICE_TABLE(of, of_tca6507_leds_match);
 
 #else
 static struct tca6507_platform_data *
@@ -830,7 +831,6 @@ static int tca6507_remove(struct i2c_client *client)
 static struct i2c_driver tca6507_driver = {
 	.driver   = {
 		.name    = "leds-tca6507",
-		.owner   = THIS_MODULE,
 		.of_match_table = of_match_ptr(of_tca6507_leds_match),
 	},
 	.probe    = tca6507_probe,
diff --git a/drivers/leds/leds-tlc591xx.c b/drivers/leds/leds-tlc591xx.c
index de16c29d7895..b806eca83d27 100644
--- a/drivers/leds/leds-tlc591xx.c
+++ b/drivers/leds/leds-tlc591xx.c
@@ -231,10 +231,6 @@ tlc591xx_probe(struct i2c_client *client,
 	if (!count || count > tlc591xx->max_leds)
 		return -EINVAL;
 
-	if (!i2c_check_functionality(client->adapter,
-				     I2C_FUNC_SMBUS_BYTE_DATA))
-		return -EIO;
-
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
index 49794b47b51c..5bda6a9b56bb 100644
--- a/drivers/leds/trigger/Kconfig
+++ b/drivers/leds/trigger/Kconfig
@@ -72,7 +72,7 @@ config LEDS_TRIGGER_CPU
 config LEDS_TRIGGER_GPIO
 	tristate "LED GPIO Trigger"
 	depends on LEDS_TRIGGERS
-	depends on GPIOLIB
+	depends on GPIOLIB || COMPILE_TEST
 	help
 	  This allows LEDs to be controlled by gpio events. It's good
 	  when using gpios as switches and triggering the needed LEDs
diff --git a/include/dt-bindings/leds/leds-ns2.h b/include/dt-bindings/leds/leds-ns2.h
new file mode 100644
index 000000000000..491c5f974a92
--- /dev/null
+++ b/include/dt-bindings/leds/leds-ns2.h
@@ -0,0 +1,8 @@
+#ifndef _DT_BINDINGS_LEDS_NS2_H
+#define _DT_BINDINGS_LEDS_NS2_H
+
+#define NS_V2_LED_OFF	0
+#define NS_V2_LED_ON	1
+#define NS_V2_LED_SATA	2
+
+#endif
diff --git a/include/linux/platform_data/leds-kirkwood-ns2.h b/include/linux/platform_data/leds-kirkwood-ns2.h
index 6a9fed57f346..eb8a6860e816 100644
--- a/include/linux/platform_data/leds-kirkwood-ns2.h
+++ b/include/linux/platform_data/leds-kirkwood-ns2.h
@@ -9,11 +9,25 @@
 #ifndef __LEDS_KIRKWOOD_NS2_H
 #define __LEDS_KIRKWOOD_NS2_H
 
+enum ns2_led_modes {
+	NS_V2_LED_OFF,
+	NS_V2_LED_ON,
+	NS_V2_LED_SATA,
+};
+
+struct ns2_led_modval {
+	enum ns2_led_modes	mode;
+	int			cmd_level;
+	int			slow_level;
+};
+
 struct ns2_led {
 	const char	*name;
 	const char	*default_trigger;
 	unsigned	cmd;
 	unsigned	slow;
+	int		num_modes;
+	struct ns2_led_modval *modval;
 };
 
 struct ns2_led_platform_data {