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889c2b7ec4
Initially, the meson clock directory only hosted 2 controllers drivers, for meson8 and gxbb. At the time, both used the same set of clock drivers so managing the dependencies was not a big concern. Since this ancient time, entropy did its job, controllers with different requirement and specific clock drivers have been added. Unfortunately, we did not do a great job at managing the dependencies between the controllers and the different clock drivers. Some drivers, such as clk-phase or vid-pll-div, are compiled even if they are useless on the target (meson8). As we are adding new controllers, we need to be able to pick a driver w/o pulling the whole thing. The patch aims to clean things up by: * providing a dedicated CONFIG_ for each clock drivers * allowing clock drivers to be compiled as a modules, if possible * stating explicitly which drivers are required by each controller. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://lkml.kernel.org/r/20190201125841.26785-5-jbrunet@baylibre.com
130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2018 BayLibre, SAS.
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* Author: Jerome Brunet <jbrunet@baylibre.com>
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*/
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#ifndef __CLK_REGMAP_H
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#define __CLK_REGMAP_H
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#include <linux/clk-provider.h>
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#include <linux/regmap.h>
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/**
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* struct clk_regmap - regmap backed clock
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*
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* @hw: handle between common and hardware-specific interfaces
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* @map: pointer to the regmap structure controlling the clock
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* @data: data specific to the clock type
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*
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* Clock which is controlled by regmap backed registers. The actual type of
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* of the clock is controlled by the clock_ops and data.
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*/
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struct clk_regmap {
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struct clk_hw hw;
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struct regmap *map;
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void *data;
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};
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#define to_clk_regmap(_hw) container_of(_hw, struct clk_regmap, hw)
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/**
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* struct clk_regmap_gate_data - regmap backed gate specific data
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*
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* @offset: offset of the register controlling gate
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* @bit_idx: single bit controlling gate
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* @flags: hardware-specific flags
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*
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* Flags:
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* Same as clk_gate except CLK_GATE_HIWORD_MASK which is ignored
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*/
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struct clk_regmap_gate_data {
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unsigned int offset;
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u8 bit_idx;
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u8 flags;
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};
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static inline struct clk_regmap_gate_data *
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clk_get_regmap_gate_data(struct clk_regmap *clk)
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{
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return (struct clk_regmap_gate_data *)clk->data;
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}
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extern const struct clk_ops clk_regmap_gate_ops;
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extern const struct clk_ops clk_regmap_gate_ro_ops;
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/**
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* struct clk_regmap_div_data - regmap backed adjustable divider specific data
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*
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* @offset: offset of the register controlling the divider
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* @shift: shift to the divider bit field
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* @width: width of the divider bit field
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* @table: array of value/divider pairs, last entry should have div = 0
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*
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* Flags:
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* Same as clk_divider except CLK_DIVIDER_HIWORD_MASK which is ignored
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*/
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struct clk_regmap_div_data {
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unsigned int offset;
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u8 shift;
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u8 width;
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u8 flags;
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const struct clk_div_table *table;
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};
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static inline struct clk_regmap_div_data *
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clk_get_regmap_div_data(struct clk_regmap *clk)
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{
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return (struct clk_regmap_div_data *)clk->data;
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}
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extern const struct clk_ops clk_regmap_divider_ops;
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extern const struct clk_ops clk_regmap_divider_ro_ops;
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/**
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* struct clk_regmap_mux_data - regmap backed multiplexer clock specific data
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*
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* @hw: handle between common and hardware-specific interfaces
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* @offset: offset of theregister controlling multiplexer
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* @table: array of parent indexed register values
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* @shift: shift to multiplexer bit field
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* @mask: mask of mutliplexer bit field
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* @flags: hardware-specific flags
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*
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* Flags:
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* Same as clk_divider except CLK_MUX_HIWORD_MASK which is ignored
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*/
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struct clk_regmap_mux_data {
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unsigned int offset;
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u32 *table;
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u32 mask;
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u8 shift;
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u8 flags;
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};
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static inline struct clk_regmap_mux_data *
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clk_get_regmap_mux_data(struct clk_regmap *clk)
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{
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return (struct clk_regmap_mux_data *)clk->data;
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}
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extern const struct clk_ops clk_regmap_mux_ops;
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extern const struct clk_ops clk_regmap_mux_ro_ops;
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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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#endif /* __CLK_REGMAP_H */
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