From 570a0bb82f0b5c2c6324153010e72c3f0c26a7a3 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Sat, 17 Jul 2010 11:10:00 +0000 Subject: MIPS: JZ4740: Add clock API support. Add support for managing the clocks found on JZ4740 SoC through the Linux clock API. Signed-off-by: Lars-Peter Clausen 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 --- arch/mips/jz4740/clock.h | 76 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 arch/mips/jz4740/clock.h (limited to 'arch/mips/jz4740/clock.h') diff --git a/arch/mips/jz4740/clock.h b/arch/mips/jz4740/clock.h new file mode 100644 index 000000000000..5d07499d7461 --- /dev/null +++ b/arch/mips/jz4740/clock.h @@ -0,0 +1,76 @@ +/* + * Copyright (C) 2010, Lars-Peter Clausen + * JZ4740 SoC clock support + * + * 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#ifndef __MIPS_JZ4740_CLOCK_H__ +#define __MIPS_JZ4740_CLOCK_H__ + +#include + +struct jz4740_clock_board_data { + unsigned long ext_rate; + unsigned long rtc_rate; +}; + +extern struct jz4740_clock_board_data jz4740_clock_bdata; + +void jz4740_clock_suspend(void); +void jz4740_clock_resume(void); + +struct clk; + +struct clk_ops { + unsigned long (*get_rate)(struct clk *clk); + unsigned long (*round_rate)(struct clk *clk, unsigned long rate); + int (*set_rate)(struct clk *clk, unsigned long rate); + int (*enable)(struct clk *clk); + int (*disable)(struct clk *clk); + int (*is_enabled)(struct clk *clk); + + int (*set_parent)(struct clk *clk, struct clk *parent); + +}; + +struct clk { + const char *name; + struct clk *parent; + + uint32_t gate_bit; + + const struct clk_ops *ops; + + struct list_head list; + +#ifdef CONFIG_DEBUG_FS + struct dentry *debugfs_entry; + struct dentry *debugfs_parent_entry; +#endif + +}; + +#define JZ4740_CLK_NOT_GATED ((uint32_t)-1) + +int clk_is_enabled(struct clk *clk); + +#ifdef CONFIG_DEBUG_FS +void jz4740_clock_debugfs_init(void); +void jz4740_clock_debugfs_add_clk(struct clk *clk); +void jz4740_clock_debugfs_update_parent(struct clk *clk); +#else +static inline void jz4740_clock_debugfs_init(void) {}; +static inline void jz4740_clock_debugfs_add_clk(struct clk *clk) {}; +static inline void jz4740_clock_debugfs_update_parent(struct clk *clk) {}; +#endif + +#endif -- cgit v1.2.3