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/*
* 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);
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