mirror of
https://github.com/torvalds/linux.git
synced 2024-11-19 02:21:47 +00:00
392ba5fafc
Some of the N-M-style clocks, namely the PLLs, support sigma-delta modulation to do fractional-N frequency synthesis. This is used in the audio PLL to generate the exact frequency the audio blocks need. These frequencies can not be generated with integer N-M factors. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2016 Maxime Ripard. All rights reserved.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef _CCU_NM_H_
|
|
#define _CCU_NM_H_
|
|
|
|
#include <linux/clk-provider.h>
|
|
|
|
#include "ccu_common.h"
|
|
#include "ccu_div.h"
|
|
#include "ccu_frac.h"
|
|
#include "ccu_mult.h"
|
|
#include "ccu_sdm.h"
|
|
|
|
/*
|
|
* struct ccu_nm - Definition of an N-M clock
|
|
*
|
|
* Clocks based on the formula parent * N / M
|
|
*/
|
|
struct ccu_nm {
|
|
u32 enable;
|
|
u32 lock;
|
|
|
|
struct ccu_mult_internal n;
|
|
struct ccu_div_internal m;
|
|
struct ccu_frac_internal frac;
|
|
struct ccu_sdm_internal sdm;
|
|
|
|
struct ccu_common common;
|
|
};
|
|
|
|
#define SUNXI_CCU_NM_WITH_SDM_GATE_LOCK(_struct, _name, _parent, _reg, \
|
|
_nshift, _nwidth, \
|
|
_mshift, _mwidth, \
|
|
_sdm_table, _sdm_en, \
|
|
_sdm_reg, _sdm_reg_en, \
|
|
_gate, _lock, _flags) \
|
|
struct ccu_nm _struct = { \
|
|
.enable = _gate, \
|
|
.lock = _lock, \
|
|
.n = _SUNXI_CCU_MULT(_nshift, _nwidth), \
|
|
.m = _SUNXI_CCU_DIV(_mshift, _mwidth), \
|
|
.sdm = _SUNXI_CCU_SDM(_sdm_table, _sdm_en, \
|
|
_sdm_reg, _sdm_reg_en),\
|
|
.common = { \
|
|
.reg = _reg, \
|
|
.features = CCU_FEATURE_SIGMA_DELTA_MOD, \
|
|
.hw.init = CLK_HW_INIT(_name, \
|
|
_parent, \
|
|
&ccu_nm_ops, \
|
|
_flags), \
|
|
}, \
|
|
}
|
|
|
|
#define SUNXI_CCU_NM_WITH_FRAC_GATE_LOCK(_struct, _name, _parent, _reg, \
|
|
_nshift, _nwidth, \
|
|
_mshift, _mwidth, \
|
|
_frac_en, _frac_sel, \
|
|
_frac_rate_0, _frac_rate_1, \
|
|
_gate, _lock, _flags) \
|
|
struct ccu_nm _struct = { \
|
|
.enable = _gate, \
|
|
.lock = _lock, \
|
|
.n = _SUNXI_CCU_MULT(_nshift, _nwidth), \
|
|
.m = _SUNXI_CCU_DIV(_mshift, _mwidth), \
|
|
.frac = _SUNXI_CCU_FRAC(_frac_en, _frac_sel, \
|
|
_frac_rate_0, \
|
|
_frac_rate_1), \
|
|
.common = { \
|
|
.reg = _reg, \
|
|
.features = CCU_FEATURE_FRACTIONAL, \
|
|
.hw.init = CLK_HW_INIT(_name, \
|
|
_parent, \
|
|
&ccu_nm_ops, \
|
|
_flags), \
|
|
}, \
|
|
}
|
|
|
|
#define SUNXI_CCU_NM_WITH_GATE_LOCK(_struct, _name, _parent, _reg, \
|
|
_nshift, _nwidth, \
|
|
_mshift, _mwidth, \
|
|
_gate, _lock, _flags) \
|
|
struct ccu_nm _struct = { \
|
|
.enable = _gate, \
|
|
.lock = _lock, \
|
|
.n = _SUNXI_CCU_MULT(_nshift, _nwidth), \
|
|
.m = _SUNXI_CCU_DIV(_mshift, _mwidth), \
|
|
.common = { \
|
|
.reg = _reg, \
|
|
.hw.init = CLK_HW_INIT(_name, \
|
|
_parent, \
|
|
&ccu_nm_ops, \
|
|
_flags), \
|
|
}, \
|
|
}
|
|
|
|
static inline struct ccu_nm *hw_to_ccu_nm(struct clk_hw *hw)
|
|
{
|
|
struct ccu_common *common = hw_to_ccu_common(hw);
|
|
|
|
return container_of(common, struct ccu_nm, common);
|
|
}
|
|
|
|
extern const struct clk_ops ccu_nm_ops;
|
|
|
|
#endif /* _CCU_NM_H_ */
|