Initial import

1 files changed, 411 insertions, 0 deletions

diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h
new file mode 100644
index 000000000..e4c75383c
--- /dev/null
+++ b/drivers/clk/samsung/clk.h
@@ -0,0 +1,411 @@
+/*
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2013 Linaro Ltd.
+ * Author: Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Common Clock Framework support for all Samsung platforms
+*/
+
+#ifndef __SAMSUNG_CLK_H
+#define __SAMSUNG_CLK_H
+
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include "clk-pll.h"
+
+/**
+ * struct samsung_clk_provider: information about clock provider
+ * @reg_base: virtual address for the register base.
+ * @clk_data: holds clock related data like clk* and number of clocks.
+ * @lock: maintains exclusion between callbacks for a given clock-provider.
+ */
+struct samsung_clk_provider {
+	void __iomem *reg_base;
+	struct clk_onecell_data clk_data;
+	spinlock_t lock;
+};
+
+/**
+ * struct samsung_clock_alias: information about mux clock
+ * @id: platform specific id of the clock.
+ * @dev_name: name of the device to which this clock belongs.
+ * @alias: optional clock alias name to be assigned to this clock.
+ */
+struct samsung_clock_alias {
+	unsigned int		id;
+	const char		*dev_name;
+	const char		*alias;
+};
+
+#define ALIAS(_id, dname, a)	\
+	{							\
+		.id		= _id,				\
+		.dev_name	= dname,			\
+		.alias		= a,				\
+	}
+
+#define MHZ (1000 * 1000)
+
+/**
+ * struct samsung_fixed_rate_clock: information about fixed-rate clock
+ * @id: platform specific id of the clock.
+ * @name: name of this fixed-rate clock.
+ * @parent_name: optional parent clock name.
+ * @flags: optional fixed-rate clock flags.
+ * @fixed-rate: fixed clock rate of this clock.
+ */
+struct samsung_fixed_rate_clock {
+	unsigned int		id;
+	char			*name;
+	const char		*parent_name;
+	unsigned long		flags;
+	unsigned long		fixed_rate;
+};
+
+#define FRATE(_id, cname, pname, f, frate)		\
+	{						\
+		.id		= _id,			\
+		.name		= cname,		\
+		.parent_name	= pname,		\
+		.flags		= f,			\
+		.fixed_rate	= frate,		\
+	}
+
+/*
+ * struct samsung_fixed_factor_clock: information about fixed-factor clock
+ * @id: platform specific id of the clock.
+ * @name: name of this fixed-factor clock.
+ * @parent_name: parent clock name.
+ * @mult: fixed multiplication factor.
+ * @div: fixed division factor.
+ * @flags: optional fixed-factor clock flags.
+ */
+struct samsung_fixed_factor_clock {
+	unsigned int		id;
+	char			*name;
+	const char		*parent_name;
+	unsigned long		mult;
+	unsigned long		div;
+	unsigned long		flags;
+};
+
+#define FFACTOR(_id, cname, pname, m, d, f)		\
+	{						\
+		.id		= _id,			\
+		.name		= cname,		\
+		.parent_name	= pname,		\
+		.mult		= m,			\
+		.div		= d,			\
+		.flags		= f,			\
+	}
+
+/**
+ * struct samsung_mux_clock: information about mux clock
+ * @id: platform specific id of the clock.
+ * @dev_name: name of the device to which this clock belongs.
+ * @name: name of this mux clock.
+ * @parent_names: array of pointer to parent clock names.
+ * @num_parents: number of parents listed in @parent_names.
+ * @flags: optional flags for basic clock.
+ * @offset: offset of the register for configuring the mux.
+ * @shift: starting bit location of the mux control bit-field in @reg.
+ * @width: width of the mux control bit-field in @reg.
+ * @mux_flags: flags for mux-type clock.
+ * @alias: optional clock alias name to be assigned to this clock.
+ */
+struct samsung_mux_clock {
+	unsigned int		id;
+	const char		*dev_name;
+	const char		*name;
+	const char		**parent_names;
+	u8			num_parents;
+	unsigned long		flags;
+	unsigned long		offset;
+	u8			shift;
+	u8			width;
+	u8			mux_flags;
+	const char		*alias;
+};
+
+#define __MUX(_id, dname, cname, pnames, o, s, w, f, mf, a)	\
+	{							\
+		.id		= _id,				\
+		.dev_name	= dname,			\
+		.name		= cname,			\
+		.parent_names	= pnames,			\
+		.num_parents	= ARRAY_SIZE(pnames),		\
+		.flags		= (f) | CLK_SET_RATE_NO_REPARENT, \
+		.offset		= o,				\
+		.shift		= s,				\
+		.width		= w,				\
+		.mux_flags	= mf,				\
+		.alias		= a,				\
+	}
+
+#define MUX(_id, cname, pnames, o, s, w)			\
+	__MUX(_id, NULL, cname, pnames, o, s, w, 0, 0, NULL)
+
+#define MUX_A(_id, cname, pnames, o, s, w, a)			\
+	__MUX(_id, NULL, cname, pnames, o, s, w, 0, 0, a)
+
+#define MUX_F(_id, cname, pnames, o, s, w, f, mf)		\
+	__MUX(_id, NULL, cname, pnames, o, s, w, f, mf, NULL)
+
+#define MUX_FA(_id, cname, pnames, o, s, w, f, mf, a)		\
+	__MUX(_id, NULL, cname, pnames, o, s, w, f, mf, a)
+
+/**
+ * @id: platform specific id of the clock.
+ * struct samsung_div_clock: information about div clock
+ * @dev_name: name of the device to which this clock belongs.
+ * @name: name of this div clock.
+ * @parent_name: name of the parent clock.
+ * @flags: optional flags for basic clock.
+ * @offset: offset of the register for configuring the div.
+ * @shift: starting bit location of the div control bit-field in @reg.
+ * @div_flags: flags for div-type clock.
+ * @alias: optional clock alias name to be assigned to this clock.
+ */
+struct samsung_div_clock {
+	unsigned int		id;
+	const char		*dev_name;
+	const char		*name;
+	const char		*parent_name;
+	unsigned long		flags;
+	unsigned long		offset;
+	u8			shift;
+	u8			width;
+	u8			div_flags;
+	const char		*alias;
+	struct clk_div_table	*table;
+};
+
+#define __DIV(_id, dname, cname, pname, o, s, w, f, df, a, t)	\
+	{							\
+		.id		= _id,				\
+		.dev_name	= dname,			\
+		.name		= cname,			\
+		.parent_name	= pname,			\
+		.flags		= f,				\
+		.offset		= o,				\
+		.shift		= s,				\
+		.width		= w,				\
+		.div_flags	= df,				\
+		.alias		= a,				\
+		.table		= t,				\
+	}
+
+#define DIV(_id, cname, pname, o, s, w)				\
+	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, NULL, NULL)
+
+#define DIV_A(_id, cname, pname, o, s, w, a)			\
+	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, a, NULL)
+
+#define DIV_F(_id, cname, pname, o, s, w, f, df)		\
+	__DIV(_id, NULL, cname, pname, o, s, w, f, df, NULL, NULL)
+
+#define DIV_T(_id, cname, pname, o, s, w, t)			\
+	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, NULL, t)
+
+/**
+ * struct samsung_gate_clock: information about gate clock
+ * @id: platform specific id of the clock.
+ * @dev_name: name of the device to which this clock belongs.
+ * @name: name of this gate clock.
+ * @parent_name: name of the parent clock.
+ * @flags: optional flags for basic clock.
+ * @offset: offset of the register for configuring the gate.
+ * @bit_idx: bit index of the gate control bit-field in @reg.
+ * @gate_flags: flags for gate-type clock.
+ * @alias: optional clock alias name to be assigned to this clock.
+ */
+struct samsung_gate_clock {
+	unsigned int		id;
+	const char		*dev_name;
+	const char		*name;
+	const char		*parent_name;
+	unsigned long		flags;
+	unsigned long		offset;
+	u8			bit_idx;
+	u8			gate_flags;
+	const char		*alias;
+};
+
+#define __GATE(_id, dname, cname, pname, o, b, f, gf, a)	\
+	{							\
+		.id		= _id,				\
+		.dev_name	= dname,			\
+		.name		= cname,			\
+		.parent_name	= pname,			\
+		.flags		= f,				\
+		.offset		= o,				\
+		.bit_idx	= b,				\
+		.gate_flags	= gf,				\
+		.alias		= a,				\
+	}
+
+#define GATE(_id, cname, pname, o, b, f, gf)			\
+	__GATE(_id, NULL, cname, pname, o, b, f, gf, NULL)
+
+#define GATE_A(_id, cname, pname, o, b, f, gf, a)		\
+	__GATE(_id, NULL, cname, pname, o, b, f, gf, a)
+
+#define GATE_D(_id, dname, cname, pname, o, b, f, gf)		\
+	__GATE(_id, dname, cname, pname, o, b, f, gf, NULL)
+
+#define GATE_DA(_id, dname, cname, pname, o, b, f, gf, a)	\
+	__GATE(_id, dname, cname, pname, o, b, f, gf, a)
+
+#define PNAME(x) static const char *x[] __initdata
+
+/**
+ * struct samsung_clk_reg_dump: register dump of clock controller registers.
+ * @offset: clock register offset from the controller base address.
+ * @value: the value to be register at offset.
+ */
+struct samsung_clk_reg_dump {
+	u32	offset;
+	u32	value;
+};
+
+/**
+ * struct samsung_pll_clock: information about pll clock
+ * @id: platform specific id of the clock.
+ * @dev_name: name of the device to which this clock belongs.
+ * @name: name of this pll clock.
+ * @parent_name: name of the parent clock.
+ * @flags: optional flags for basic clock.
+ * @con_offset: offset of the register for configuring the PLL.
+ * @lock_offset: offset of the register for locking the PLL.
+ * @type: Type of PLL to be registered.
+ * @alias: optional clock alias name to be assigned to this clock.
+ */
+struct samsung_pll_clock {
+	unsigned int		id;
+	const char		*dev_name;
+	const char		*name;
+	const char		*parent_name;
+	unsigned long		flags;
+	int			con_offset;
+	int			lock_offset;
+	enum samsung_pll_type	type;
+	const struct samsung_pll_rate_table *rate_table;
+	const char              *alias;
+};
+
+#define __PLL(_typ, _id, _dname, _name, _pname, _flags, _lock, _con,	\
+		_rtable, _alias)					\
+	{								\
+		.id		= _id,					\
+		.type		= _typ,					\
+		.dev_name	= _dname,				\
+		.name		= _name,				\
+		.parent_name	= _pname,				\
+		.flags		= CLK_GET_RATE_NOCACHE,			\
+		.con_offset	= _con,					\
+		.lock_offset	= _lock,				\
+		.rate_table	= _rtable,				\
+		.alias		= _alias,				\
+	}
+
+#define PLL(_typ, _id, _name, _pname, _lock, _con, _rtable)	\
+	__PLL(_typ, _id, NULL, _name, _pname, CLK_GET_RATE_NOCACHE,	\
+		_lock, _con, _rtable, _name)
+
+#define PLL_A(_typ, _id, _name, _pname, _lock, _con, _alias, _rtable) \
+	__PLL(_typ, _id, NULL, _name, _pname, CLK_GET_RATE_NOCACHE,	\
+		_lock, _con, _rtable, _alias)
+
+struct samsung_clock_reg_cache {
+	struct list_head node;
+	void __iomem *reg_base;
+	struct samsung_clk_reg_dump *rdump;
+	unsigned int rd_num;
+};
+
+struct samsung_cmu_info {
+	/* list of pll clocks and respective count */
+	struct samsung_pll_clock *pll_clks;
+	unsigned int nr_pll_clks;
+	/* list of mux clocks and respective count */
+	struct samsung_mux_clock *mux_clks;
+	unsigned int nr_mux_clks;
+	/* list of div clocks and respective count */
+	struct samsung_div_clock *div_clks;
+	unsigned int nr_div_clks;
+	/* list of gate clocks and respective count */
+	struct samsung_gate_clock *gate_clks;
+	unsigned int nr_gate_clks;
+	/* list of fixed clocks and respective count */
+	struct samsung_fixed_rate_clock *fixed_clks;
+	unsigned int nr_fixed_clks;
+	/* list of fixed factor clocks and respective count */
+	struct samsung_fixed_factor_clock *fixed_factor_clks;
+	unsigned int nr_fixed_factor_clks;
+	/* total number of clocks with IDs assigned*/
+	unsigned int nr_clk_ids;
+
+	/* list and number of clocks registers */
+	unsigned long *clk_regs;
+	unsigned int nr_clk_regs;
+};
+
+extern struct samsung_clk_provider *__init samsung_clk_init(
+			struct device_node *np, void __iomem *base,
+			unsigned long nr_clks);
+extern void __init samsung_clk_of_add_provider(struct device_node *np,
+			struct samsung_clk_provider *ctx);
+extern void __init samsung_clk_of_register_fixed_ext(
+			struct samsung_clk_provider *ctx,
+			struct samsung_fixed_rate_clock *fixed_rate_clk,
+			unsigned int nr_fixed_rate_clk,
+			const struct of_device_id *clk_matches);
+
+extern void samsung_clk_add_lookup(struct samsung_clk_provider *ctx,
+			struct clk *clk, unsigned int id);
+
+extern void samsung_clk_register_alias(struct samsung_clk_provider *ctx,
+			struct samsung_clock_alias *list,
+			unsigned int nr_clk);
+extern void __init samsung_clk_register_fixed_rate(
+			struct samsung_clk_provider *ctx,
+			struct samsung_fixed_rate_clock *clk_list,
+			unsigned int nr_clk);
+extern void __init samsung_clk_register_fixed_factor(
+			struct samsung_clk_provider *ctx,
+			struct samsung_fixed_factor_clock *list,
+			unsigned int nr_clk);
+extern void __init samsung_clk_register_mux(struct samsung_clk_provider *ctx,
+			struct samsung_mux_clock *clk_list,
+			unsigned int nr_clk);
+extern void __init samsung_clk_register_div(struct samsung_clk_provider *ctx,
+			struct samsung_div_clock *clk_list,
+			unsigned int nr_clk);
+extern void __init samsung_clk_register_gate(struct samsung_clk_provider *ctx,
+			struct samsung_gate_clock *clk_list,
+			unsigned int nr_clk);
+extern void __init samsung_clk_register_pll(struct samsung_clk_provider *ctx,
+			struct samsung_pll_clock *pll_list,
+			unsigned int nr_clk, void __iomem *base);
+
+extern struct samsung_clk_provider __init *samsung_cmu_register_one(
+			struct device_node *,
+			struct samsung_cmu_info *);
+
+extern unsigned long _get_rate(const char *clk_name);
+
+extern void samsung_clk_save(void __iomem *base,
+			struct samsung_clk_reg_dump *rd,
+			unsigned int num_regs);
+extern void samsung_clk_restore(void __iomem *base,
+			const struct samsung_clk_reg_dump *rd,
+			unsigned int num_regs);
+extern struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(
+			const unsigned long *rdump,
+			unsigned long nr_rdump);
+
+#endif /* __SAMSUNG_CLK_H */