diff --git a/arch/arm/plat-omap/include/plat/opp.h b/arch/arm/plat-omap/include/plat/opp.h
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+/*
+ * OMAP OPP Interface
+ *
+ * Copyright (C) 2009 Texas Instruments Incorporated.
+ *	Nishanth Menon
+ * Copyright (C) 2009 Deep Root Systems, LLC.
+ *	Kevin Hilman
+ *
+ * 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.
+ */
+#ifndef __ASM_ARM_OMAP_OPP_H
+#define __ASM_ARM_OMAP_OPP_H
+
+/**
+ * struct omap_opp - OMAP OPP description structure
+ * @enabled:	true/false - marking this OPP as enabled/disabled
+ * @rate:	Frequency in hertz
+ * @opp_id:	(DEPRECATED) opp identifier
+ * @vsel:	Voltage in volt processor level(this usage is
+ *		DEPRECATED to use Voltage in microvolts in future)
+ *		uV = ((vsel * 12.5) + 600) * 1000
+ *
+ * This structure stores the OPP information for a given domain.
+ * Due to legacy reasons, this structure is currently exposed and
+ * will soon be removed elsewhere and will only be used as a handle
+ * from the OPP internal referencing mechanism
+ */
+struct omap_opp {
+	bool enabled;
+	unsigned long rate;
+	u8 opp_id __deprecated;
+	u16 vsel;
+};
+
+/**
+ * opp_get_voltage() - Gets the voltage corresponding to an opp
+ * @opp:	opp for which voltage has to be returned for
+ *
+ * Return voltage in micro volt corresponding to the opp, else
+ * return 0
+ */
+unsigned long opp_get_voltage(const struct omap_opp *opp);
+
+/**
+ * opp_get_freq() - Gets the frequency corresponding to an opp
+ * @opp:	opp for which frequency has to be returned for
+ *
+ * Return frequency in hertz corresponding to the opp, else
+ * return 0
+ */
+unsigned long opp_get_freq(const struct omap_opp *opp);
+
+/**
+ * opp_get_opp_count - Get number of opps enabled in the opp list
+ * @num:	returns the number of opps
+ * @oppl:	opp list
+ *
+ * This functions returns the number of opps if there are any OPPs enabled,
+ * else returns corresponding error value.
+ */
+int opp_get_opp_count(const struct omap_opp *oppl);
+
+#define OPP_SEARCH_HIGH		(0 << 1)
+#define OPP_SEARCH_LOW		(1 << 1)
+/**
+ * opp_find_freq_approx() - Search for an approximate freq
+ * @oppl:	starting list
+ * @freq:	start frequency
+ * @dir_flags:	search direction
+ *		OPP_SEARCH_HIGH - search for next highest freq
+ *		OPP_SEARCH_LOW - search for next lowest freq
+ *
+ * Search for the higher/lower *enabled* OPP than a starting freq
+ * from a start opp list.
+
+ * Returns *opp and *freq is populated with the next match,
+ * else returns NULL
+ *
+ * Example usages:
+ *	* print all frequencies in descending order *
+ *	unsigned long freq;
+ *	struct omap_opp *opp;
+ *	for(opp = oppl, freq = ULONG_MAX; opp;
+ *		opp = opp_find_freq_approx(opp, &freq, OPP_SEARCH_LOW))
+ *		pr_info("%ld ", freq);
+ *
+ *	* print all frequencies in ascending order *
+ *	unsigned long freq = 0;
+ *	struct omap_opp *opp;
+ *	for(opp = oppl, freq = 0; opp;
+ *		opp = opp_find_freq_approx(opp, &freq, OPP_SEARCH_HIGH))
+ *		pr_info("%ld ", freq);
+ * NOTE: if we set freq as ULONG_MAX, we get the highest enabled frequency
+ *
+ */
+struct omap_opp *opp_find_freq_approx(struct omap_opp *oppl,
+		unsigned long *freq, u8 dir_flags);
+
+/**
+ * opp_find_freq_exact() - search for an exact frequency
+ * @oppl:	OPP list
+ * @freq:	frequency to search for
+ * @enabled:	enabled/disabled OPP to search for
+ *
+ * searches for the match in the opp list and returns handle to the matching
+ * opp if found, else returns NULL.
+ *
+ * Note enabled is a modifier for the search. if enabled=true, then the match is
+ * for exact matching frequency and is enabled. if true, the match is for exact
+ * frequency which is disabled.
+ */
+struct omap_opp *opp_find_freq_exact(struct omap_opp *oppl,
+		unsigned long freq, bool enabled);
+
+
+/**
+ * struct omap_opp_def - OMAP OPP Definition
+ * @enabled:	True/false - is this OPP enabled/disabled by default
+ * @freq:	Frequency in hertz corresponding to this OPP
+ * @u_volt:	Nominal voltage in microvolts corresponding to this OPP
+ *
+ * OMAP SOCs have a standard set of tuples consisting of frequency and voltage
+ * pairs that the device will support per voltage domain. This is called
+ * Operating Points or OPP. The actual definitions of OMAP Operating Points
+ * varies over silicon within the same family of devices. For a specific
+ * domain, you can have a set of {frequency, voltage} pairs and this is denoted
+ * by an array of omap_opp_def. As the kernel boots and more information is
+ * available, a set of these are activated based on the precise nature of
+ * device the kernel boots up on. It is interesting to remember that each IP
+ * which belongs to a voltage domain may define their own set of OPPs on top
+ * of this - but this is handled by the appropriate driver.
+ */
+struct omap_opp_def {
+	bool enabled;
+	unsigned long freq;
+	u32 u_volt;
+};
+
+/**
+ * opp_add  - Add/initialize an OPP table from a table definitions
+ * @oppl:	Returned back to caller as the opp list to reference the OPP
+ * @opp_defs:	Array of omap_opp_def to describe the OPP. This list should be
+ *		0 terminated.
+ *
+ * This function adds the opp definition to an internal opp list and returns
+ * a handle representing the OPP list. This handle is then used for further
+ * validation, search, modification operations on the OPP list.
+ *
+ * This function returns 0 and the pointer to the allocated list through oppl if
+ * success, else corresponding error value. Caller should NOT free the oppl.
+ * opps_defs can be freed after use.
+ *
+ * NOTE: caller should assume that on success, oppl is probably populated with
+ * a new handle and the new handle should be used for further referencing
+ */
+int opp_add(struct omap_opp **oppl, const struct omap_opp_def *opp_defs);
+
+/**
+ * opp_enable - Enable a specific OPP
+ * @opp:	pointer to opp
+ *
+ * Enables a provided opp. If the operation is valid, this returns 0, else the
+ * corresponding error value.
+ *
+ * OPP used here is from the the opp_is_valid/opp_has_freq or other search
+ * functions
+ */
+int opp_enable(struct omap_opp *opp);
+
+/**
+ * opp_disable - Disable a specific OPP
+ * @opp:	pointer to opp
+ *
+ * Disables a provided opp. If the operation is valid, this returns 0, else the
+ * corresponding error value.
+ *
+ * OPP used here is from the the opp_is_valid/opp_has_freq or other search
+ * functions
+ */
+int opp_disable(struct omap_opp *opp);
+
+#endif		/* __ASM_ARM_OMAP_OPP_H *
