[linux-2.6-block.git] / drivers / pinctrl / pinctrl-utils.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Utils functions to implement the pincontrol driver.
 *
 * Copyright (c) 2013, NVIDIA Corporation.
 *
 * Author: Laxman Dewangan <ldewangan@nvidia.com>
 */
#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_array(*map, new_num, sizeof(*new_map), 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);
Commit	Line	Data
e634cf4e	1	// SPDX-License-Identifier: GPL-2.0-only
1eb207a9 LD	2	/*
	3	* Utils functions to implement the pincontrol driver.
	4	*
	5	* Copyright (c) 2013, NVIDIA Corporation.
	6	*
	7	* Author: Laxman Dewangan <ldewangan@nvidia.com>
1eb207a9 LD	8	*/
1eb207a9 LD	9	#include <linux/device.h>
2f62eb9d	10	#include <linux/export.h>
1eb207a9 LD	11	#include <linux/kernel.h>
	12	#include <linux/pinctrl/pinctrl.h>
	13	#include <linux/of.h>
	14	#include <linux/slab.h>
	15	#include "core.h"
	16	#include "pinctrl-utils.h"
	17
	18	int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev,
	19	struct pinctrl_map *map, unsigned reserved_maps,
	20	unsigned *num_maps, unsigned reserve)
	21	{
	22	unsigned old_num = *reserved_maps;
	23	unsigned new_num = *num_maps + reserve;
	24	struct pinctrl_map *new_map;
	25
	26	if (old_num >= new_num)
	27	return 0;
	28
2207994d	29	new_map = krealloc_array(map, new_num, sizeof(new_map), GFP_KERNEL);
1eb207a9 LD	30	if (!new_map) {
	31	dev_err(pctldev->dev, "krealloc(map) failed\n");
	32	return -ENOMEM;
	33	}
	34
	35	memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
	36
	37	*map = new_map;
	38	*reserved_maps = new_num;
	39	return 0;
	40	}
	41	EXPORT_SYMBOL_GPL(pinctrl_utils_reserve_map);
	42
	43	int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev,
	44	struct pinctrl_map *map, unsigned reserved_maps,
	45	unsigned num_maps, const char group,
	46	const char *function)
	47	{
	48	if (WARN_ON(num_maps == reserved_maps))
	49	return -ENOSPC;
	50
	51	(map)[num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
	52	(map)[num_maps].data.mux.group = group;
	53	(map)[num_maps].data.mux.function = function;
	54	(*num_maps)++;
	55
	56	return 0;
	57	}
	58	EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_mux);
	59
	60	int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev,
	61	struct pinctrl_map *map, unsigned reserved_maps,
	62	unsigned num_maps, const char group,
	63	unsigned long *configs, unsigned num_configs,
	64	enum pinctrl_map_type type)
	65	{
	66	unsigned long *dup_configs;
	67
	68	if (WARN_ON(num_maps == reserved_maps))
	69	return -ENOSPC;
	70
	71	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
	72	GFP_KERNEL);
86f75c65	73	if (!dup_configs)
1eb207a9	74	return -ENOMEM;
1eb207a9 LD	75
	76	(map)[num_maps].type = type;
	77	(map)[num_maps].data.configs.group_or_pin = group;
	78	(map)[num_maps].data.configs.configs = dup_configs;
	79	(map)[num_maps].data.configs.num_configs = num_configs;
	80	(*num_maps)++;
	81
	82	return 0;
	83	}
	84	EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_configs);
	85
	86	int pinctrl_utils_add_config(struct pinctrl_dev *pctldev,
	87	unsigned long *configs, unsigned num_configs,
	88	unsigned long config)
	89	{
	90	unsigned old_num = *num_configs;
	91	unsigned new_num = old_num + 1;
	92	unsigned long *new_configs;
	93
	94	new_configs = krealloc(configs, sizeof(new_configs) * new_num,
	95	GFP_KERNEL);
	96	if (!new_configs) {
	97	dev_err(pctldev->dev, "krealloc(configs) failed\n");
	98	return -ENOMEM;
	99	}
	100
	101	new_configs[old_num] = config;
	102
	103	*configs = new_configs;
	104	*num_configs = new_num;
	105
	106	return 0;
	107	}
	108	EXPORT_SYMBOL_GPL(pinctrl_utils_add_config);
	109
d32f7fd3	110	void pinctrl_utils_free_map(struct pinctrl_dev *pctldev,
1eb207a9 LD	111	struct pinctrl_map *map, unsigned num_maps)
	112	{
	113	int i;
	114
3287c240 LD	115	for (i = 0; i < num_maps; i++) {
	116	switch (map[i].type) {
	117	case PIN_MAP_TYPE_CONFIGS_GROUP:
	118	case PIN_MAP_TYPE_CONFIGS_PIN:
1eb207a9	119	kfree(map[i].data.configs.configs);
3287c240 LD	120	break;
	121	default:
	122	break;
	123	}
	124	}
1eb207a9 LD	125	kfree(map);
1eb207a9 LD	126	}
d32f7fd3	127	EXPORT_SYMBOL_GPL(pinctrl_utils_free_map);