2 * Copyright (c) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
18 DECLARE_GLOBAL_DATA_PTR;
20 static struct regmap *regmap_alloc_count(int count)
24 map = malloc(sizeof(struct regmap));
28 map->range = &map->base_range;
30 map->range = malloc(count * sizeof(struct regmap_range));
36 map->range_count = count;
41 #if CONFIG_IS_ENABLED(OF_PLATDATA)
42 int regmap_init_mem_platdata(struct udevice *dev, u32 *reg, int count,
45 struct regmap_range *range;
48 map = regmap_alloc_count(count);
53 for (range = map->range; count > 0; reg += 2, range++, count--) {
63 int regmap_init_mem(struct udevice *dev, struct regmap **mapp)
65 const void *blob = gd->fdt_blob;
66 struct regmap_range *range;
70 int addr_len, size_len, both_len;
75 parent = dev_of_offset(dev->parent);
76 addr_len = fdt_address_cells(blob, parent);
77 size_len = fdt_size_cells(blob, parent);
78 both_len = addr_len + size_len;
80 cell = fdt_getprop(blob, dev_of_offset(dev), "reg", &len);
82 count = len / both_len;
86 map = regmap_alloc_count(count);
90 for (range = map->range, index = 0; count > 0;
91 count--, cell += both_len, range++, index++) {
93 range->start = fdtdec_get_addr_size_fixed(blob, dev->of_offset,
94 "reg", index, addr_len, size_len, &sz, true);
97 map->base = map->range[0].start;
105 void *regmap_get_range(struct regmap *map, unsigned int range_num)
107 struct regmap_range *range;
109 if (range_num >= map->range_count)
111 range = &map->range[range_num];
113 return map_sysmem(range->start, range->size);
116 int regmap_uninit(struct regmap *map)
118 if (map->range_count > 1)
125 int regmap_read(struct regmap *map, uint offset, uint *valp)
127 uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE);
129 *valp = le32_to_cpu(readl(ptr));
134 int regmap_write(struct regmap *map, uint offset, uint val)
136 uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE);
138 writel(cpu_to_le32(val), ptr);