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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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
/*
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* Copyright (c) 2016 Maxime Ripard. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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#ifndef _CCU_NM_H_
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#define _CCU_NM_H_
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#include <linux/clk-provider.h>
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#include "ccu_common.h"
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#include "ccu_div.h"
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#include "ccu_frac.h"
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#include "ccu_mult.h"
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#include "ccu_sdm.h"
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/*
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* struct ccu_nm - Definition of an N-M clock
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*
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* Clocks based on the formula parent * N / M
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*/
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struct ccu_nm {
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u32 enable;
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u32 lock;
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struct ccu_mult_internal n;
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struct ccu_div_internal m;
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struct ccu_frac_internal frac;
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struct ccu_sdm_internal sdm;
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struct ccu_common common;
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};
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#define SUNXI_CCU_NM_WITH_SDM_GATE_LOCK(_struct, _name, _parent, _reg, \
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_nshift, _nwidth, \
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_mshift, _mwidth, \
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_sdm_table, _sdm_en, \
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_sdm_reg, _sdm_reg_en, \
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_gate, _lock, _flags) \
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struct ccu_nm _struct = { \
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.enable = _gate, \
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.lock = _lock, \
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.n = _SUNXI_CCU_MULT(_nshift, _nwidth), \
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.m = _SUNXI_CCU_DIV(_mshift, _mwidth), \
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.sdm = _SUNXI_CCU_SDM(_sdm_table, _sdm_en, \
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_sdm_reg, _sdm_reg_en),\
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.common = { \
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.reg = _reg, \
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.features = CCU_FEATURE_SIGMA_DELTA_MOD, \
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.hw.init = CLK_HW_INIT(_name, \
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_parent, \
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&ccu_nm_ops, \
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_flags), \
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}, \
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}
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#define SUNXI_CCU_NM_WITH_FRAC_GATE_LOCK(_struct, _name, _parent, _reg, \
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_nshift, _nwidth, \
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_mshift, _mwidth, \
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_frac_en, _frac_sel, \
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_frac_rate_0, _frac_rate_1, \
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_gate, _lock, _flags) \
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struct ccu_nm _struct = { \
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.enable = _gate, \
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.lock = _lock, \
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.n = _SUNXI_CCU_MULT(_nshift, _nwidth), \
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.m = _SUNXI_CCU_DIV(_mshift, _mwidth), \
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.frac = _SUNXI_CCU_FRAC(_frac_en, _frac_sel, \
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_frac_rate_0, \
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_frac_rate_1), \
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.common = { \
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.reg = _reg, \
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.features = CCU_FEATURE_FRACTIONAL, \
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.hw.init = CLK_HW_INIT(_name, \
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_parent, \
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&ccu_nm_ops, \
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_flags), \
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}, \
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}
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#define SUNXI_CCU_NM_WITH_GATE_LOCK(_struct, _name, _parent, _reg, \
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_nshift, _nwidth, \
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_mshift, _mwidth, \
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_gate, _lock, _flags) \
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struct ccu_nm _struct = { \
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.enable = _gate, \
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.lock = _lock, \
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.n = _SUNXI_CCU_MULT(_nshift, _nwidth), \
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.m = _SUNXI_CCU_DIV(_mshift, _mwidth), \
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.common = { \
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.reg = _reg, \
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.hw.init = CLK_HW_INIT(_name, \
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_parent, \
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&ccu_nm_ops, \
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_flags), \
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}, \
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}
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static inline struct ccu_nm *hw_to_ccu_nm(struct clk_hw *hw)
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{
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struct ccu_common *common = hw_to_ccu_common(hw);
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return container_of(common, struct ccu_nm, common);
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}
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extern const struct clk_ops ccu_nm_ops;
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#endif /* _CCU_NM_H_ */
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