Release 4.17 drivers/clk/meson/clkc.h

/*
 * Copyright (c) 2015 Endless Mobile, Inc.
 * Author: Carlo Caione <carlo@endlessm.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __CLKC_H

#define __CLKC_H

#include <linux/clk-provider.h>
#include "clk-regmap.h"


#define PMASK(width)			GENMASK(width - 1, 0)

#define SETPMASK(width, shift)		GENMASK(shift + width - 1, shift)

#define CLRPMASK(width, shift)		(~SETPMASK(width, shift))


#define PARM_GET(width, shift, reg)					\
	(((reg) & SETPMASK(width, shift)) >> (shift))

#define PARM_SET(width, shift, reg, val)				\
	(((reg) & CLRPMASK(width, shift)) | ((val) << (shift)))


#define MESON_PARM_APPLICABLE(p)		(!!((p)->width))


struct parm {
	
u16	reg_off;
	
u8	shift;
	
u8	width;
};



static inline unsigned int meson_parm_read(struct regmap *map, struct parm *p)
{
	unsigned int val;

	regmap_read(map, p->reg_off, &val);
	return PARM_GET(p->width, p->shift, val);
}

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static inline void meson_parm_write(struct regmap *map, struct parm *p,
				    unsigned int val)
{
	regmap_update_bits(map, p->reg_off, SETPMASK(p->width, p->shift),
			   val << p->shift);
}


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struct pll_rate_table {
	
unsigned long	rate;
	
u16		m;
	
u16		n;
	
u16		od;
	
u16		od2;
	
u16		od3;
};


#define PLL_RATE(_r, _m, _n, _od)					\
	{                                                               \
                .rate           = (_r),                                 \
                .m              = (_m),                                 \
                .n              = (_n),                                 \
                .od             = (_od),                                \
        }


#define CLK_MESON_PLL_ROUND_CLOSEST	BIT(0)


struct meson_clk_pll_data {
	
struct parm m;
	
struct parm n;
	
struct parm frac;
	
struct parm od;
	
struct parm od2;
	
struct parm od3;
	
struct parm l;
	
struct parm rst;
	
const struct reg_sequence *init_regs;
	
unsigned int init_count;
	
const struct pll_rate_table *table;
	
u8 flags;
};


#define to_meson_clk_pll(_hw) container_of(_hw, struct meson_clk_pll, hw)


struct meson_clk_mpll_data {
	
struct parm sdm;
	
struct parm sdm_en;
	
struct parm n2;
	
struct parm ssen;
	
struct parm misc;
	
spinlock_t *lock;
};


struct meson_clk_audio_div_data {
	
struct parm div;
	
u8 flags;
};


#define MESON_GATE(_name, _reg, _bit)					\
struct clk_regmap _name = {                                             \
        .data = &(struct clk_regmap_gate_data){                         \
                .offset = (_reg),                                       \
                .bit_idx = (_bit),                                      \
        },                                                              \
        .hw.init = &(struct clk_init_data) {                            \
                .name = #_name,                                         \
                .ops = &clk_regmap_gate_ops,                            \
                .parent_names = (const char *[]){ "clk81" },            \
                .num_parents = 1,                                       \
                .flags = (CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED),     \
        },                                                              \
};

/* clk_ops */
extern const struct clk_ops meson_clk_pll_ro_ops;
extern const struct clk_ops meson_clk_pll_ops;
extern const struct clk_ops meson_clk_cpu_ops;
extern const struct clk_ops meson_clk_mpll_ro_ops;
extern const struct clk_ops meson_clk_mpll_ops;
extern const struct clk_ops meson_clk_audio_divider_ro_ops;
extern const struct clk_ops meson_clk_audio_divider_ops;

#endif /* __CLKC_H */
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Directory: drivers/clk/meson

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