Start our new clock infrastructure by adding the registration code, common
structure and common code.

Signed-off-by: Maxime Ripard <redacted>

---
Changes from v1:
  - Moved from of_iomap to of_io_request_and_map
  - Change lock bit feature name to PLL_LOCK
  - Fixed bug in clocks description array iteration
  - Changed clock register offset size to u16
---
 drivers/clk/Makefile              |  1 +
 drivers/clk/sunxi-ng/Makefile     |  2 +
 drivers/clk/sunxi-ng/ccu_common.c | 99 +++++++++++++++++++++++++++++++++++++++
 drivers/clk/sunxi-ng/ccu_common.h | 74 +++++++++++++++++++++++++++++
 drivers/clk/sunxi-ng/ccu_mult.h   | 15 ++++++
 drivers/clk/sunxi-ng/ccu_reset.c  | 55 ++++++++++++++++++++++
 drivers/clk/sunxi-ng/ccu_reset.h  | 40 ++++++++++++++++
 7 files changed, 286 insertions(+)
 create mode 100644 drivers/clk/sunxi-ng/Makefile
 create mode 100644 drivers/clk/sunxi-ng/ccu_common.c
 create mode 100644 drivers/clk/sunxi-ng/ccu_common.h
 create mode 100644 drivers/clk/sunxi-ng/ccu_mult.h
 create mode 100644 drivers/clk/sunxi-ng/ccu_reset.c
 create mode 100644 drivers/clk/sunxi-ng/ccu_reset.h

diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index dcc5e698ff6d..7a44a1526d60 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile

@@ -79,6 +79,7 @@ obj-$(CONFIG_ARCH_SOCFPGA)		+= socfpga/
 obj-$(CONFIG_PLAT_SPEAR)		+= spear/
 obj-$(CONFIG_ARCH_STI)			+= st/
 obj-$(CONFIG_ARCH_SUNXI)		+= sunxi/
+obj-$(CONFIG_ARCH_SUNXI)		+= sunxi-ng/
 obj-$(CONFIG_ARCH_TEGRA)		+= tegra/
 obj-y					+= ti/
 obj-$(CONFIG_ARCH_U8500)		+= ux500/

diff --git a/drivers/clk/sunxi-ng/Makefile b/drivers/clk/sunxi-ng/Makefile
new file mode 100644
index 000000000000..bd3461b0f38c
--- /dev/null
+++ b/drivers/clk/sunxi-ng/Makefile

@@ -0,0 +1,2 @@
+obj-y += ccu_common.o
+obj-y += ccu_reset.o

diff --git a/drivers/clk/sunxi-ng/ccu_common.c b/drivers/clk/sunxi-ng/ccu_common.c
new file mode 100644
index 000000000000..618fb26974c8
--- /dev/null
+++ b/drivers/clk/sunxi-ng/ccu_common.c

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2016 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/iopoll.h>
+#include <linux/slab.h>
+
+#include "ccu_common.h"
+#include "ccu_reset.h"
+
+static DEFINE_SPINLOCK(ccu_lock);
+
+void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock)
+{
+	u32 reg;
+
+	if (!(common->features & CCU_FEATURE_PLL_LOCK))
+		return;

+
+		clks[i] = clk;
+	}
+
+	ret = of_clk_add_provider(node, of_clk_src_onecell_get, data);
+	if (ret)
+		goto err_clk_unreg;
+
+	reset = kzalloc(sizeof(*reset), GFP_KERNEL);
+	reset->rcdev.of_node = node;
+	reset->rcdev.ops = &ccu_reset_ops;
+	reset->rcdev.owner = THIS_MODULE;
+	reset->rcdev.nr_resets = desc->num_resets;
+	reset->base = reg;
+	reset->lock = &ccu_lock;
+	reset->reset_map = desc->resets;
+
+	ret = reset_controller_register(&reset->rcdev);
+	if (ret)
+		goto err_of_clk_unreg;
+
+	return 0;
+
+err_of_clk_unreg:
+err_clk_unreg:
+	return ret;
+}

diff --git a/drivers/clk/sunxi-ng/ccu_common.h b/drivers/clk/sunxi-ng/ccu_common.h
new file mode 100644
index 000000000000..fda245020273
--- /dev/null
+++ b/drivers/clk/sunxi-ng/ccu_common.h

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2016 Maxime Ripard. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _COMMON_H_
+#define _COMMON_H_
+
+#include <linux/compiler.h>
+#include <linux/clk-provider.h>
+
+#define CCU_FEATURE_GATE		BIT(0)
+#define CCU_FEATURE_PLL_LOCK		BIT(1)
+#define CCU_FEATURE_FRACTIONAL		BIT(2)
+#define CCU_FEATURE_VARIABLE_PREDIV	BIT(3)
+#define CCU_FEATURE_FIXED_PREDIV	BIT(4)
+#define CCU_FEATURE_FIXED_POSTDIV	BIT(5)
+
+struct device_node;
+
+#define SUNXI_HW_INIT(_name, _parent, _ops, _flags)			\
+	&(struct clk_init_data) {					\
+		.flags		= _flags,				\
+		.name		= _name,				\
+		.parent_names	= (const char *[]) { _parent },		\
+		.num_parents	= 1,					\
+		.ops 		= _ops,					\
+	}
+
+#define SUNXI_HW_INIT_PARENTS(_name, _parents, _ops, _flags)		\
+	&(struct clk_init_data) {					\
+		.flags		= _flags,				\
+		.name		= _name,				\
+		.parent_names	= _parents,				\
+		.num_parents	= ARRAY_SIZE(_parents),			\
+		.ops 		= _ops,					\
+	}
+
+struct ccu_common {
+	void __iomem	*base;
+	u16		reg;
+
+	unsigned long	features;