[mirror_ubuntu-artful-kernel.git] / drivers / pinctrl / pinctrl-utils.c

/*
 * 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/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) {
		dev_err(pctldev->dev, "kmemdup(configs) failed\n");
		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_dt_free_map(struct pinctrl_dev *pctldev,
	      struct pinctrl_map *map, unsigned num_maps)
{
	int i;

	for (i = 0; i < num_maps; i++)
		if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
			kfree(map[i].data.configs.configs);

	kfree(map);
}
EXPORT_SYMBOL_GPL(pinctrl_utils_dt_free_map);
Commit	Line	Data
1eb207a9 LD	1	/*
	2	* Utils functions to implement the pincontrol driver.
	3	*
	4	* Copyright (c) 2013, NVIDIA Corporation.
	5	*
	6	* Author: Laxman Dewangan <ldewangan@nvidia.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation version 2.
	11	*
	12	* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
	13	* whether express or implied; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	20	* 02111-1307, USA
	21	*/
	22	#include <linux/device.h>
	23	#include <linux/kernel.h>
	24	#include <linux/pinctrl/pinctrl.h>
	25	#include <linux/of.h>
	26	#include <linux/slab.h>
	27	#include "core.h"
	28	#include "pinctrl-utils.h"
	29
	30	int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev,
	31	struct pinctrl_map *map, unsigned reserved_maps,
	32	unsigned *num_maps, unsigned reserve)
	33	{
	34	unsigned old_num = *reserved_maps;
	35	unsigned new_num = *num_maps + reserve;
	36	struct pinctrl_map *new_map;
	37
	38	if (old_num >= new_num)
	39	return 0;
	40
	41	new_map = krealloc(map, sizeof(new_map) * new_num, GFP_KERNEL);
	42	if (!new_map) {
	43	dev_err(pctldev->dev, "krealloc(map) failed\n");
	44	return -ENOMEM;
	45	}
	46
	47	memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
	48
	49	*map = new_map;
	50	*reserved_maps = new_num;
	51	return 0;
	52	}
	53	EXPORT_SYMBOL_GPL(pinctrl_utils_reserve_map);
	54
	55	int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev,
	56	struct pinctrl_map *map, unsigned reserved_maps,
	57	unsigned num_maps, const char group,
	58	const char *function)
	59	{
	60	if (WARN_ON(num_maps == reserved_maps))
	61	return -ENOSPC;
	62
	63	(map)[num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
	64	(map)[num_maps].data.mux.group = group;
65	(map)[num_maps].data.mux.function = function;
66	(*num_maps)++;
67
68	return 0;
69	}
70	EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_mux);
71
72	int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev,
73	struct pinctrl_map *map, unsigned reserved_maps,
74	unsigned num_maps, const char group,
75	unsigned long *configs, unsigned num_configs,
76	enum pinctrl_map_type type)
77	{
78	unsigned long *dup_configs;
79
80	if (WARN_ON(num_maps == reserved_maps))
81	return -ENOSPC;
82
83	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
84	GFP_KERNEL);
85	if (!dup_configs) {
86	dev_err(pctldev->dev, "kmemdup(configs) failed\n");
87	return -ENOMEM;
88	}
89
90	(map)[num_maps].type = type;
91	(map)[num_maps].data.configs.group_or_pin = group;
92	(map)[num_maps].data.configs.configs = dup_configs;
93	(map)[num_maps].data.configs.num_configs = num_configs;
94	(*num_maps)++;
95
96	return 0;
97	}
98	EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_configs);
99
100	int pinctrl_utils_add_config(struct pinctrl_dev *pctldev,
101	unsigned long *configs, unsigned num_configs,
102	unsigned long config)
103	{
104	unsigned old_num = *num_configs;
105	unsigned new_num = old_num + 1;
106	unsigned long *new_configs;
107
108	new_configs = krealloc(configs, sizeof(new_configs) * new_num,
109	GFP_KERNEL);
110	if (!new_configs) {
111	dev_err(pctldev->dev, "krealloc(configs) failed\n");
112	return -ENOMEM;
113	}
114
115	new_configs[old_num] = config;
116
117	*configs = new_configs;
118	*num_configs = new_num;
119
120	return 0;
121	}
122	EXPORT_SYMBOL_GPL(pinctrl_utils_add_config);
123
124	void pinctrl_utils_dt_free_map(struct pinctrl_dev *pctldev,
125	struct pinctrl_map *map, unsigned num_maps)
126	{
127	int i;
128
129	for (i = 0; i < num_maps; i++)
130	if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
131	kfree(map[i].data.configs.configs);
132
133	kfree(map);
134	}
135	EXPORT_SYMBOL_GPL(pinctrl_utils_dt_free_map);