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/*
* 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);
}
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);
}
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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