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- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * Copyright (c) 2015 Google, Inc
- * Written by Simon Glass <sjg@chromium.org>
- */
- #ifndef __REGMAP_H
- #define __REGMAP_H
- /**
- * struct regmap_range - a register map range
- *
- * @start: Start address
- * @size: Size in bytes
- */
- struct regmap_range {
- ulong start;
- ulong size;
- };
- /**
- * struct regmap - a way of accessing hardware/bus registers
- *
- * @range_count: Number of ranges available within the map
- * @ranges: Array of ranges
- */
- struct regmap {
- int range_count;
- struct regmap_range ranges[0];
- };
- /*
- * Interface to provide access to registers either through a direct memory
- * bus or through a peripheral bus like I2C, SPI.
- */
- int regmap_write(struct regmap *map, uint offset, uint val);
- int regmap_read(struct regmap *map, uint offset, uint *valp);
- #define regmap_write32(map, ptr, member, val) \
- regmap_write(map, (uint32_t *)(ptr)->member - (uint32_t *)(ptr), val)
- #define regmap_read32(map, ptr, member, valp) \
- regmap_read(map, (uint32_t *)(ptr)->member - (uint32_t *)(ptr), valp)
- /**
- * regmap_update_bits() - Perform a read/modify/write using a mask
- *
- * @map: The map returned by regmap_init_mem*()
- * @offset: Offset of the memory
- * @mask: Mask to apply to the read value
- * @val: Value to apply to the value to write
- */
- int regmap_update_bits(struct regmap *map, uint offset, uint mask, uint val);
- /**
- * regmap_init_mem() - Set up a new register map that uses memory access
- *
- * Use regmap_uninit() to free it.
- *
- * @node: Device node that uses this map
- * @mapp: Returns allocated map
- */
- int regmap_init_mem(ofnode node, struct regmap **mapp);
- /**
- * regmap_init_mem_platdata() - Set up a new memory register map for of-platdata
- *
- * This creates a new regmap with a list of regions passed in, rather than
- * using the device tree. It only supports 32-bit machines.
- *
- * Use regmap_uninit() to free it.
- *
- * @dev: Device that uses this map
- * @reg: List of address, size pairs
- * @count: Number of pairs (e.g. 1 if the regmap has a single entry)
- * @mapp: Returns allocated map
- */
- int regmap_init_mem_platdata(struct udevice *dev, fdt_val_t *reg, int count,
- struct regmap **mapp);
- /**
- * regmap_get_range() - Obtain the base memory address of a regmap range
- *
- * @map: Regmap to query
- * @range_num: Range to look up
- */
- void *regmap_get_range(struct regmap *map, unsigned int range_num);
- /**
- * regmap_uninit() - free a previously inited regmap
- */
- int regmap_uninit(struct regmap *map);
- #endif
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