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140 lines
3.7 KiB
140 lines
3.7 KiB
/* |
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* Utils functions to implement the pincontrol driver. |
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* |
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* Copyright (c) 2013, NVIDIA Corporation. |
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* |
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* Author: Laxman Dewangan <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation version 2. |
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* |
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, |
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* whether express or implied; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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* 02111-1307, USA |
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*/ |
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#include <linux/device.h> |
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#include <linux/export.h> |
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#include <linux/kernel.h> |
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#include <linux/pinctrl/pinctrl.h> |
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#include <linux/of.h> |
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#include <linux/slab.h> |
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#include "core.h" |
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#include "pinctrl-utils.h" |
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int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev, |
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struct pinctrl_map **map, unsigned *reserved_maps, |
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unsigned *num_maps, unsigned reserve) |
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{ |
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unsigned old_num = *reserved_maps; |
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unsigned new_num = *num_maps + reserve; |
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struct pinctrl_map *new_map; |
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if (old_num >= new_num) |
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return 0; |
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new_map = krealloc_array(*map, new_num, sizeof(*new_map), GFP_KERNEL); |
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if (!new_map) { |
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dev_err(pctldev->dev, "krealloc(map) failed\n"); |
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return -ENOMEM; |
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} |
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memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map)); |
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*map = new_map; |
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*reserved_maps = new_num; |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(pinctrl_utils_reserve_map); |
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int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev, |
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struct pinctrl_map **map, unsigned *reserved_maps, |
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unsigned *num_maps, const char *group, |
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const char *function) |
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{ |
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if (WARN_ON(*num_maps == *reserved_maps)) |
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return -ENOSPC; |
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(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; |
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(*map)[*num_maps].data.mux.group = group; |
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(*map)[*num_maps].data.mux.function = function; |
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(*num_maps)++; |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_mux); |
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int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev, |
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struct pinctrl_map **map, unsigned *reserved_maps, |
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unsigned *num_maps, const char *group, |
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unsigned long *configs, unsigned num_configs, |
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enum pinctrl_map_type type) |
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{ |
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unsigned long *dup_configs; |
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if (WARN_ON(*num_maps == *reserved_maps)) |
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return -ENOSPC; |
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dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs), |
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GFP_KERNEL); |
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if (!dup_configs) |
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return -ENOMEM; |
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(*map)[*num_maps].type = type; |
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(*map)[*num_maps].data.configs.group_or_pin = group; |
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(*map)[*num_maps].data.configs.configs = dup_configs; |
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(*map)[*num_maps].data.configs.num_configs = num_configs; |
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(*num_maps)++; |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_configs); |
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int pinctrl_utils_add_config(struct pinctrl_dev *pctldev, |
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unsigned long **configs, unsigned *num_configs, |
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unsigned long config) |
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{ |
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unsigned old_num = *num_configs; |
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unsigned new_num = old_num + 1; |
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unsigned long *new_configs; |
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new_configs = krealloc(*configs, sizeof(*new_configs) * new_num, |
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GFP_KERNEL); |
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if (!new_configs) { |
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dev_err(pctldev->dev, "krealloc(configs) failed\n"); |
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return -ENOMEM; |
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} |
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new_configs[old_num] = config; |
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*configs = new_configs; |
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*num_configs = new_num; |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(pinctrl_utils_add_config); |
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void pinctrl_utils_free_map(struct pinctrl_dev *pctldev, |
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struct pinctrl_map *map, unsigned num_maps) |
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{ |
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int i; |
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for (i = 0; i < num_maps; i++) { |
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switch (map[i].type) { |
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case PIN_MAP_TYPE_CONFIGS_GROUP: |
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case PIN_MAP_TYPE_CONFIGS_PIN: |
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kfree(map[i].data.configs.configs); |
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break; |
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default: |
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break; |
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} |
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} |
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kfree(map); |
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} |
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EXPORT_SYMBOL_GPL(pinctrl_utils_free_map);
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