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dd601dbc01
Putting hard-coded rates inside the parameter tables assumes that the parent is known and will never change. That's a big assumption we should not make. We have everything we need to recalculate the output rate using the parent rate and the rest of the parameters. Let's do so and drop the rates from the tables. Acked-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2015 Endless Mobile, Inc.
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* Author: Carlo Caione <carlo@endlessm.com>
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*/
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#ifndef __CLKC_H
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#define __CLKC_H
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#include <linux/clk-provider.h>
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#include "clk-regmap.h"
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#define PMASK(width) GENMASK(width - 1, 0)
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#define SETPMASK(width, shift) GENMASK(shift + width - 1, shift)
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#define CLRPMASK(width, shift) (~SETPMASK(width, shift))
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#define PARM_GET(width, shift, reg) \
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(((reg) & SETPMASK(width, shift)) >> (shift))
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#define PARM_SET(width, shift, reg, val) \
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(((reg) & CLRPMASK(width, shift)) | ((val) << (shift)))
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#define MESON_PARM_APPLICABLE(p) (!!((p)->width))
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struct parm {
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u16 reg_off;
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u8 shift;
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u8 width;
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};
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static inline unsigned int meson_parm_read(struct regmap *map, struct parm *p)
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{
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unsigned int val;
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regmap_read(map, p->reg_off, &val);
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return PARM_GET(p->width, p->shift, val);
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}
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static inline void meson_parm_write(struct regmap *map, struct parm *p,
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unsigned int val)
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{
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regmap_update_bits(map, p->reg_off, SETPMASK(p->width, p->shift),
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val << p->shift);
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}
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struct pll_params_table {
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u16 m;
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u16 n;
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};
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#define PLL_PARAMS(_m, _n) \
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{ \
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.m = (_m), \
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.n = (_n), \
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}
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#define CLK_MESON_PLL_ROUND_CLOSEST BIT(0)
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struct meson_clk_pll_data {
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struct parm en;
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struct parm m;
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struct parm n;
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struct parm frac;
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struct parm l;
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struct parm rst;
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const struct reg_sequence *init_regs;
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unsigned int init_count;
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const struct pll_params_table *table;
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u8 flags;
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};
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#define to_meson_clk_pll(_hw) container_of(_hw, struct meson_clk_pll, hw)
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struct meson_clk_mpll_data {
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struct parm sdm;
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struct parm sdm_en;
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struct parm n2;
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struct parm ssen;
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struct parm misc;
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spinlock_t *lock;
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u8 flags;
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};
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#define CLK_MESON_MPLL_ROUND_CLOSEST BIT(0)
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struct meson_clk_phase_data {
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struct parm ph;
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};
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int meson_clk_degrees_from_val(unsigned int val, unsigned int width);
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unsigned int meson_clk_degrees_to_val(int degrees, unsigned int width);
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#define MESON_GATE(_name, _reg, _bit) \
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struct clk_regmap _name = { \
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.data = &(struct clk_regmap_gate_data){ \
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.offset = (_reg), \
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.bit_idx = (_bit), \
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}, \
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.hw.init = &(struct clk_init_data) { \
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.name = #_name, \
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.ops = &clk_regmap_gate_ops, \
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.parent_names = (const char *[]){ "clk81" }, \
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.num_parents = 1, \
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.flags = (CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED), \
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}, \
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};
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/* clk_ops */
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extern const struct clk_ops meson_clk_pll_ro_ops;
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extern const struct clk_ops meson_clk_pll_ops;
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extern const struct clk_ops meson_clk_cpu_ops;
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extern const struct clk_ops meson_clk_mpll_ro_ops;
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extern const struct clk_ops meson_clk_mpll_ops;
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extern const struct clk_ops meson_clk_phase_ops;
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#endif /* __CLKC_H */
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