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https://github.com/Fishwaldo/opensbi.git
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14a35b0e0e
We add generic regmap access library which is independent of hardware description format (FDT or ACPI). The OpenSBI platform support or regmap drivers can register regmap instances which can be discovered by different regmap clients based on the unique ID of regmap instances. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Xiang W <wxjstz@126.com>
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2023 Ventana Micro Systems Inc.
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*
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* Authors:
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* Anup Patel <apatel@ventanamicro.com>
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*/
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#ifndef __REGMAP_H__
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#define __REGMAP_H__
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#include <sbi/sbi_types.h>
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#include <sbi/sbi_list.h>
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/** Representation of a regmap instance */
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struct regmap {
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/** Uniquie ID of the regmap instance assigned by the driver */
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unsigned int id;
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/** Configuration of regmap registers */
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int reg_shift;
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int reg_stride;
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unsigned int reg_base;
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unsigned int reg_max;
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/** Read a regmap register */
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int (*reg_read)(struct regmap *rmap, unsigned int reg,
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unsigned int *val);
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/** Write a regmap register */
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int (*reg_write)(struct regmap *rmap, unsigned int reg,
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unsigned int val);
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/** Read-modify-write a regmap register */
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int (*reg_update_bits)(struct regmap *rmap, unsigned int reg,
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unsigned int mask, unsigned int val);
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/** List */
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struct sbi_dlist node;
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};
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static inline struct regmap *to_regmap(struct sbi_dlist *node)
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{
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return container_of(node, struct regmap, node);
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}
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/** Find a registered regmap instance */
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struct regmap *regmap_find(unsigned int id);
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/** Register a regmap instance */
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int regmap_add(struct regmap *rmap);
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/** Un-register a regmap instance */
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void regmap_remove(struct regmap *rmap);
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/** Read a register in a regmap instance */
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int regmap_read(struct regmap *rmap, unsigned int reg, unsigned int *val);
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/** Write a register in a regmap instance */
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int regmap_write(struct regmap *rmap, unsigned int reg, unsigned int val);
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/** Read-modify-write a register in a regmap instance */
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int regmap_update_bits(struct regmap *rmap, unsigned int reg,
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unsigned int mask, unsigned int val);
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#endif
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