3287c24088
Add support to pass the config type like GROUP or PIN when using the utils or generic pin configuration APIs. This will make the APIs more generic. Added additional inline APIs such that it can be use directly as callback for the pinctrl_ops. Changes from V1: - Remove separate implementation for pins and group for pinctrl_utils_dt_free_map and improve this function to support both i.e. PINS and GROUPs. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
142 lines
3.7 KiB
C
142 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/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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dev_err(pctldev->dev, "kmemdup(configs) failed\n");
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return -ENOMEM;
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}
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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_dt_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_dt_free_map);
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