/* * Utils functions to implement the pincontrol driver. * * Copyright (c) 2013, NVIDIA Corporation. * * Author: Laxman Dewangan <ldewangan@nvidia.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation version 2. * * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, * whether express or implied; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307, USA */ #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(*map, sizeof(*new_map) * new_num, 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);