84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
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/*
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* File : drv_clock.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2008 - 2016, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2015-11-19 Urey the first version
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*/
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#ifndef DRV_CLOCK_H_
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#define DRV_CLOCK_H_
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#include "board.h"
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#define I2S_PRI_DIV 0xb0020030
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#define PCM_PRI_DIV 0xb0030014
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struct clk;
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struct clk_ops {
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int (*enable) (struct clk *,int);
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struct clk* (*get_parent) (struct clk *);
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int (*set_parent) (struct clk *,struct clk *);
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uint32_t (*get_rate) (struct clk *);
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int (*set_rate) (struct clk *,uint32_t);
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int (*set_round_rate) (struct clk *,uint32_t);
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};
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struct clk {
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const char *name;
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uint32_t rate;
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struct clk *parent;
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uint32_t flags;
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#define CLK_FLG_NOALLOC BIT(0)
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#define CLK_FLG_ENABLE BIT(1)
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#define CLK_GATE_BIT(flg) ((flg) >> 24)
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#define CLK_FLG_GATE BIT(2)
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#define CLK_CPCCR_NO(flg) (((flg) >> 24) & 0xff)
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#define CLK_FLG_CPCCR BIT(3)
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#define CLK_CGU_NO(flg) (((flg) >> 24) & 0xff)
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#define CLK_FLG_CGU BIT(4)
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#define CLK_PLL_NO(flg) (((flg) >> 24) & 0xff)
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#define CLK_FLG_PLL BIT(5)
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#define CLK_CGU_AUDIO_NO(flg) (((flg) >> 24) & 0xff)
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#define CLK_FLG_CGU_AUDIO BIT(6)
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#define CLK_PARENT(flg) (((flg) >> 16) & 0xff)
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#define CLK_RELATIVE(flg) (((flg) >> 16) & 0xff)
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#define CLK_FLG_PARENT BIT(7)
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#define CLK_FLG_RELATIVE BIT(8)
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struct clk_ops *ops;
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int count;
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int init_state;
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struct clk *source;
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struct clk *child;
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unsigned int CLK_ID;
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};
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int init_all_clk(void);
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struct clk *clk_get(const char *id);
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int clk_enable(struct clk *clk);
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int clk_is_enabled(struct clk *clk);
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void clk_disable(struct clk *clk);
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uint32_t clk_get_rate(struct clk *clk);
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void clk_put(struct clk *clk);
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int clk_set_rate(struct clk *clk, uint32_t rate);
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#endif
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