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570a0bb82f
Add support for managing the clocks found on JZ4740 SoC through the Linux clock API. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1466/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
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* JZ4740 SoC clock support
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef __MIPS_JZ4740_CLOCK_H__
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#define __MIPS_JZ4740_CLOCK_H__
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#include <linux/list.h>
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struct jz4740_clock_board_data {
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unsigned long ext_rate;
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unsigned long rtc_rate;
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};
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extern struct jz4740_clock_board_data jz4740_clock_bdata;
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void jz4740_clock_suspend(void);
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void jz4740_clock_resume(void);
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struct clk;
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struct clk_ops {
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unsigned long (*get_rate)(struct clk *clk);
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unsigned long (*round_rate)(struct clk *clk, unsigned long rate);
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int (*set_rate)(struct clk *clk, unsigned long rate);
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int (*enable)(struct clk *clk);
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int (*disable)(struct clk *clk);
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int (*is_enabled)(struct clk *clk);
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int (*set_parent)(struct clk *clk, struct clk *parent);
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};
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struct clk {
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const char *name;
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struct clk *parent;
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uint32_t gate_bit;
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const struct clk_ops *ops;
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struct list_head list;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_entry;
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struct dentry *debugfs_parent_entry;
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#endif
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};
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#define JZ4740_CLK_NOT_GATED ((uint32_t)-1)
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int clk_is_enabled(struct clk *clk);
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#ifdef CONFIG_DEBUG_FS
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void jz4740_clock_debugfs_init(void);
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void jz4740_clock_debugfs_add_clk(struct clk *clk);
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void jz4740_clock_debugfs_update_parent(struct clk *clk);
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#else
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static inline void jz4740_clock_debugfs_init(void) {};
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static inline void jz4740_clock_debugfs_add_clk(struct clk *clk) {};
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static inline void jz4740_clock_debugfs_update_parent(struct clk *clk) {};
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#endif
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#endif
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