141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
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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 <ldewangan@nvidia.com>
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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(*map, sizeof(*new_map) * new_num, 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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