// 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/array_size.h>#include <linux/device.h>#include <linux/export.h>#include <linux/of.h>#include <linux/slab.h> #include <linux/pinctrl/pinctrl.h> #include "core.h"#include "pinctrl-utils.h" int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev,		struct pinctrl_map **map, unsigned int *reserved_maps,		unsigned int *num_maps, unsigned int reserve){	unsigned int old_num = *reserved_maps;	unsigned int 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 int *reserved_maps,		unsigned int *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 int *reserved_maps,		unsigned int *num_maps, const char *group,		unsigned long *configs, unsigned int num_configs,		enum pinctrl_map_type type){	unsigned long *dup_configs; 	if (WARN_ON(*num_maps == *reserved_maps))		return -ENOSPC; 	dup_configs = kmemdup_array(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 int *num_configs,		unsigned long config){	unsigned int old_num = *num_configs;	unsigned int 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 int 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);