Merge branch 'next' (accumulated 3.16 merge window patches) into master

Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.

* accumulated work in next: (6809 commits)
  ufs: sb mutex merge + mutex_destroy
  powerpc: update comments for generic idle conversion
  cris: update comments for generic idle conversion
  idle: remove cpu_idle() forward declarations
  nbd: zero from and len fields in NBD_CMD_DISCONNECT.
  mm: convert some level-less printks to pr_*
  MAINTAINERS: adi-buildroot-devel is moderated
  MAINTAINERS: add linux-api for review of API/ABI changes
  mm/kmemleak-test.c: use pr_fmt for logging
  fs/dlm/debug_fs.c: replace seq_printf by seq_puts
  fs/dlm/lockspace.c: convert simple_str to kstr
  fs/dlm/config.c: convert simple_str to kstr
  mm: mark remap_file_pages() syscall as deprecated
  mm: memcontrol: remove unnecessary memcg argument from soft limit functions
  mm: memcontrol: clean up memcg zoneinfo lookup
  mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
  mm/mempool.c: update the kmemleak stack trace for mempool allocations
  lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
  mm: introduce kmemleak_update_trace()
  mm/kmemleak.c: use %u to print ->checksum
  ...

1 files changed, 110 insertions, 0 deletions

diff --git a/drivers/leds/leds-versatile.c b/drivers/leds/leds-versatile.c
new file mode 100644
index 000000000000..80553022d661
--- /dev/null
+++ b/drivers/leds/leds-versatile.c
@@ -0,0 +1,110 @@
+/*
+ * Driver for the 8 user LEDs found on the RealViews and Versatiles
+ * Based on DaVinci's DM365 board code
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ * Author: Linus Walleij <triad@df.lth.se>
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+
+struct versatile_led {
+	void __iomem		*base;
+	struct led_classdev	cdev;
+	u8			mask;
+};
+
+/*
+ * The triggers lines up below will only be used if the
+ * LED triggers are compiled in.
+ */
+static const struct {
+	const char *name;
+	const char *trigger;
+} versatile_leds[] = {
+	{ "versatile:0", "heartbeat", },
+	{ "versatile:1", "mmc0", },
+	{ "versatile:2", "cpu0" },
+	{ "versatile:3", "cpu1" },
+	{ "versatile:4", "cpu2" },
+	{ "versatile:5", "cpu3" },
+	{ "versatile:6", },
+	{ "versatile:7", },
+};
+
+static void versatile_led_set(struct led_classdev *cdev,
+			      enum led_brightness b)
+{
+	struct versatile_led *led = container_of(cdev,
+						 struct versatile_led, cdev);
+	u32 reg = readl(led->base);
+
+	if (b != LED_OFF)
+		reg |= led->mask;
+	else
+		reg &= ~led->mask;
+	writel(reg, led->base);
+}
+
+static enum led_brightness versatile_led_get(struct led_classdev *cdev)
+{
+	struct versatile_led *led = container_of(cdev,
+						 struct versatile_led, cdev);
+	u32 reg = readl(led->base);
+
+	return (reg & led->mask) ? LED_FULL : LED_OFF;
+}
+
+static int versatile_leds_probe(struct platform_device *dev)
+{
+	int i;
+	struct resource *res;
+	void __iomem *base;
+
+	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(&dev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	/* All off */
+	writel(0, base);
+	for (i = 0; i < ARRAY_SIZE(versatile_leds); i++) {
+		struct versatile_led *led;
+
+		led = kzalloc(sizeof(*led), GFP_KERNEL);
+		if (!led)
+			break;
+
+		led->base = base;
+		led->cdev.name = versatile_leds[i].name;
+		led->cdev.brightness_set = versatile_led_set;
+		led->cdev.brightness_get = versatile_led_get;
+		led->cdev.default_trigger = versatile_leds[i].trigger;
+		led->mask = BIT(i);
+
+		if (led_classdev_register(NULL, &led->cdev) < 0) {
+			kfree(led);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static struct platform_driver versatile_leds_driver = {
+	.driver = {
+		.name   = "versatile-leds",
+	},
+	.probe = versatile_leds_probe,
+};
+
+module_platform_driver(versatile_leds_driver);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("ARM Versatile LED driver");
+MODULE_LICENSE("GPL v2");