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, 146 insertions, 0 deletions

diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c
new file mode 100644
index 0000000000000..79c32ca84ef16
--- /dev/null
+++ b/drivers/reset/reset-socfpga.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2014 Steffen Trumtrar <s.trumtrar@pengutronix.de>
+ *
+ * based on
+ * Allwinner SoCs Reset Controller driver
+ *
+ * Copyright 2013 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#define NR_BANKS		4
+#define OFFSET_MODRST		0x10
+
+struct socfpga_reset_data {
+	spinlock_t			lock;
+	void __iomem			*membase;
+	struct reset_controller_dev	rcdev;
+};
+
+static int socfpga_reset_assert(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	struct socfpga_reset_data *data = container_of(rcdev,
+						     struct socfpga_reset_data,
+						     rcdev);
+	int bank = id / BITS_PER_LONG;
+	int offset = id % BITS_PER_LONG;
+	unsigned long flags;
+	u32 reg;
+
+	spin_lock_irqsave(&data->lock, flags);
+
+	reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS));
+	writel(reg | BIT(offset), data->membase + OFFSET_MODRST +
+				 (bank * NR_BANKS));
+	spin_unlock_irqrestore(&data->lock, flags);
+
+	return 0;
+}
+
+static int socfpga_reset_deassert(struct reset_controller_dev *rcdev,
+				  unsigned long id)
+{
+	struct socfpga_reset_data *data = container_of(rcdev,
+						     struct socfpga_reset_data,
+						     rcdev);
+
+	int bank = id / BITS_PER_LONG;
+	int offset = id % BITS_PER_LONG;
+	unsigned long flags;
+	u32 reg;
+
+	spin_lock_irqsave(&data->lock, flags);
+
+	reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS));
+	writel(reg & ~BIT(offset), data->membase + OFFSET_MODRST +
+				  (bank * NR_BANKS));
+
+	spin_unlock_irqrestore(&data->lock, flags);
+
+	return 0;
+}
+
+static struct reset_control_ops socfpga_reset_ops = {
+	.assert		= socfpga_reset_assert,
+	.deassert	= socfpga_reset_deassert,
+};
+
+static int socfpga_reset_probe(struct platform_device *pdev)
+{
+	struct socfpga_reset_data *data;
+	struct resource *res;
+
+	/*
+	 * The binding was mainlined without the required property.
+	 * Do not continue, when we encounter an old DT.
+	 */
+	if (!of_find_property(pdev->dev.of_node, "#reset-cells", NULL)) {
+		dev_err(&pdev->dev, "%s missing #reset-cells property\n",
+			pdev->dev.of_node->full_name);
+		return -EINVAL;
+	}
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	data->membase = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(data->membase))
+		return PTR_ERR(data->membase);
+
+	spin_lock_init(&data->lock);
+
+	data->rcdev.owner = THIS_MODULE;
+	data->rcdev.nr_resets = NR_BANKS * BITS_PER_LONG;
+	data->rcdev.ops = &socfpga_reset_ops;
+	data->rcdev.of_node = pdev->dev.of_node;
+	reset_controller_register(&data->rcdev);
+
+	return 0;
+}
+
+static int socfpga_reset_remove(struct platform_device *pdev)
+{
+	struct socfpga_reset_data *data = platform_get_drvdata(pdev);
+
+	reset_controller_unregister(&data->rcdev);
+
+	return 0;
+}
+
+static const struct of_device_id socfpga_reset_dt_ids[] = {
+	{ .compatible = "altr,rst-mgr", },
+	{ /* sentinel */ },
+};
+
+static struct platform_driver socfpga_reset_driver = {
+	.probe	= socfpga_reset_probe,
+	.remove	= socfpga_reset_remove,
+	.driver = {
+		.name		= "socfpga-reset",
+		.owner		= THIS_MODULE,
+		.of_match_table	= socfpga_reset_dt_ids,
+	},
+};
+module_platform_driver(socfpga_reset_driver);
+
+MODULE_AUTHOR("Steffen Trumtrar <s.trumtrar@pengutronix.de");
+MODULE_DESCRIPTION("Socfpga Reset Controller Driver");
+MODULE_LICENSE("GPL");