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/*
* Copyright (c) 2017 Chen-Yu Tsai. 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_SDM_H
#define _CCU_SDM_H
#include <linux/clk-provider.h>
#include "ccu_common.h"
struct ccu_sdm_setting {
unsigned long rate;
/*
* XXX We don't know what the step and bottom register fields
* mean. Just copy the whole register value from the vendor
* kernel for now.
*/
u32 pattern;
/*
* M and N factors here should be the values used in
* calculation, not the raw values written to registers
*/
u32 m;
u32 n;
};
struct ccu_sdm_internal {
struct ccu_sdm_setting *table;
u32 table_size;
/* early SoCs don't have the SDM enable bit in the PLL register */
u32 enable;
/* second enable bit in tuning register */
u32 tuning_enable;
u16 tuning_reg;
};
#define _SUNXI_CCU_SDM(_table, _enable, \
_reg, _reg_enable) \
{ \
.table = _table, \
.table_size = ARRAY_SIZE(_table), \
.enable = _enable, \
.tuning_enable = _reg_enable, \
.tuning_reg = _reg, \
}
bool ccu_sdm_helper_is_enabled(struct ccu_common *common,
struct ccu_sdm_internal *sdm);
void ccu_sdm_helper_enable(struct ccu_common *common,
struct ccu_sdm_internal *sdm,
unsigned long rate);
void ccu_sdm_helper_disable(struct ccu_common *common,
struct ccu_sdm_internal *sdm);
bool ccu_sdm_helper_has_rate(struct ccu_common *common,
struct ccu_sdm_internal *sdm,
unsigned long rate);
unsigned long ccu_sdm_helper_read_rate(struct ccu_common *common,
struct ccu_sdm_internal *sdm,
u32 m, u32 n);
int ccu_sdm_helper_get_factors(struct ccu_common *common,
struct ccu_sdm_internal *sdm,
unsigned long rate,
unsigned long *m, unsigned long *n);
#endif
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