Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | // SPDX-License-Identifier: GPL-2.0-only /* * Utils functions to implement the pincontrol driver. * * Copyright (c) 2013, NVIDIA Corporation. * * Author: Laxman Dewangan <ldewangan@nvidia.com> */ #include <linux/device.h> #include <linux/export.h> #include <linux/kernel.h> #include <linux/pinctrl/pinctrl.h> #include <linux/of.h> #include <linux/slab.h> #include "core.h" #include "pinctrl-utils.h" int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev, struct pinctrl_map **map, unsigned *reserved_maps, unsigned *num_maps, unsigned reserve) { unsigned old_num = *reserved_maps; unsigned new_num = *num_maps + reserve; struct pinctrl_map *new_map; if (old_num >= new_num) return 0; new_map = krealloc_array(*map, new_num, sizeof(*new_map), GFP_KERNEL); if (!new_map) { dev_err(pctldev->dev, "krealloc(map) failed\n"); return -ENOMEM; } memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map)); *map = new_map; *reserved_maps = new_num; return 0; } EXPORT_SYMBOL_GPL(pinctrl_utils_reserve_map); int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev, struct pinctrl_map **map, unsigned *reserved_maps, unsigned *num_maps, const char *group, const char *function) { if (WARN_ON(*num_maps == *reserved_maps)) return -ENOSPC; (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; (*map)[*num_maps].data.mux.group = group; (*map)[*num_maps].data.mux.function = function; (*num_maps)++; return 0; } EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_mux); int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev, struct pinctrl_map **map, unsigned *reserved_maps, unsigned *num_maps, const char *group, unsigned long *configs, unsigned num_configs, enum pinctrl_map_type type) { unsigned long *dup_configs; if (WARN_ON(*num_maps == *reserved_maps)) return -ENOSPC; dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs), GFP_KERNEL); if (!dup_configs) return -ENOMEM; (*map)[*num_maps].type = type; (*map)[*num_maps].data.configs.group_or_pin = group; (*map)[*num_maps].data.configs.configs = dup_configs; (*map)[*num_maps].data.configs.num_configs = num_configs; (*num_maps)++; return 0; } EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_configs); int pinctrl_utils_add_config(struct pinctrl_dev *pctldev, unsigned long **configs, unsigned *num_configs, unsigned long config) { unsigned old_num = *num_configs; unsigned new_num = old_num + 1; unsigned long *new_configs; new_configs = krealloc(*configs, sizeof(*new_configs) * new_num, GFP_KERNEL); if (!new_configs) { dev_err(pctldev->dev, "krealloc(configs) failed\n"); return -ENOMEM; } new_configs[old_num] = config; *configs = new_configs; *num_configs = new_num; return 0; } EXPORT_SYMBOL_GPL(pinctrl_utils_add_config); void pinctrl_utils_free_map(struct pinctrl_dev *pctldev, struct pinctrl_map *map, unsigned num_maps) { int i; for (i = 0; i < num_maps; i++) { switch (map[i].type) { case PIN_MAP_TYPE_CONFIGS_GROUP: case PIN_MAP_TYPE_CONFIGS_PIN: kfree(map[i].data.configs.configs); break; default: break; } } kfree(map); } EXPORT_SYMBOL_GPL(pinctrl_utils_free_map); |