Release 4.16 drivers/clk/sunxi-ng/ccu_sdm.h

/*
 * 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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Directory: drivers/clk/sunxi-ng

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