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include/clk-uclass.h
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/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* * Copyright (c) 2015 Google, Inc * Written by Simon Glass <sjg@chromium.org> * Copyright (c) 2016, NVIDIA CORPORATION. |
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*/ #ifndef _CLK_UCLASS_H #define _CLK_UCLASS_H /* See clk.h for background documentation. */ #include <clk.h> |
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struct ofnode_phandle_args; |
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/** * struct clk_ops - The functions that a clock driver must implement. */ struct clk_ops { /** * of_xlate - Translate a client's device-tree (OF) clock specifier. * * The clock core calls this function as the first step in implementing * a client's clk_get_by_*() call. * * If this function pointer is set to NULL, the clock core will use a * default implementation, which assumes #clock-cells = <1>, and that * the DT cell contains a simple integer clock ID. * * At present, the clock API solely supports device-tree. If this * changes, other xxx_xlate() functions may be added to support those * other mechanisms. * * @clock: The clock struct to hold the translation result. * @args: The clock specifier values from device tree. * @return 0 if OK, or a negative error code. */ int (*of_xlate)(struct clk *clock, |
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struct ofnode_phandle_args *args); |
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/** * request - Request a translated clock. * * The clock core calls this function as the second step in * implementing a client's clk_get_by_*() call, following a successful * xxx_xlate() call, or as the only step in implementing a client's * clk_request() call. * * @clock: The clock struct to request; this has been fille in by * a previoux xxx_xlate() function call, or by the caller * of clk_request(). * @return 0 if OK, or a negative error code. */ int (*request)(struct clk *clock); /** |
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* rfree - Free a previously requested clock. |
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* * This is the implementation of the client clk_free() API. * * @clock: The clock to free. * @return 0 if OK, or a negative error code. */ |
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int (*rfree)(struct clk *clock); |
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/** * get_rate() - Get current clock rate. * * @clk: The clock to query. * @return clock rate in Hz, or -ve error code */ ulong (*get_rate)(struct clk *clk); /** * set_rate() - Set current clock rate. * * @clk: The clock to manipulate. * @rate: New clock rate in Hz. * @return new rate, or -ve error code. */ ulong (*set_rate)(struct clk *clk, ulong rate); /** |
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* set_parent() - Set current clock parent * * @clk: The clock to manipulate. * @parent: New clock parent. * @return zero on success, or -ve error code. */ int (*set_parent)(struct clk *clk, struct clk *parent); /** |
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* enable() - Enable a clock. * * @clk: The clock to manipulate. * @return zero on success, or -ve error code. */ int (*enable)(struct clk *clk); /** * disable() - Disable a clock. * * @clk: The clock to manipulate. * @return zero on success, or -ve error code. */ int (*disable)(struct clk *clk); }; #endif |