pinctrl: remove unused 'pinconf-config' debugfs interface

#include <linux/slab.h>

#include <linux/debugfs.h>

#include <linux/seq_file.h>

#include <linux/uaccess.h>

#include <linux/pinctrl/machine.h>

#include <linux/pinctrl/pinctrl.h>

#include <linux/pinctrl/pinconf.h>

DEFINE_SHOW_ATTRIBUTE(pinconf_pins);

DEFINE_SHOW_ATTRIBUTE(pinconf_groups);

#define MAX_NAME_LEN 15

struct dbg_cfg {

	enum pinctrl_map_type map_type;

	char dev_name[MAX_NAME_LEN + 1];

	char state_name[MAX_NAME_LEN + 1];

	char pin_name[MAX_NAME_LEN + 1];

};

/*

 * Goal is to keep this structure as global in order to simply read the

 * pinconf-config file after a write to check config is as expected

 */

static struct dbg_cfg pinconf_dbg_conf;

/**

 * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl

 * map, of the dev/pin/state that was last written to pinconf-config file.

 * @s: string filled in  with config description

 * @d: not used

 */

static int pinconf_dbg_config_print(struct seq_file *s, void *d)

{

	struct pinctrl_maps *maps_node;

	const struct pinctrl_map *map;

	const struct pinctrl_map *found = NULL;

	struct pinctrl_dev *pctldev;

	struct dbg_cfg *dbg = &pinconf_dbg_conf;

	int i;

	mutex_lock(&pinctrl_maps_mutex);

	/* Parse the pinctrl map and look for the elected pin/state */

	for_each_maps(maps_node, i, map) {

		if (map->type != dbg->map_type)

			continue;

		if (strcmp(map->dev_name, dbg->dev_name))

			continue;

		if (strcmp(map->name, dbg->state_name))

			continue;

		if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) {

			/* We found the right pin */

			found = map;

			break;

		}

	}

	if (!found) {

		seq_printf(s, "No config found for dev/state/pin, expected:\n");

		seq_printf(s, "Searched dev:%s\n", dbg->dev_name);

		seq_printf(s, "Searched state:%s\n", dbg->state_name);

		seq_printf(s, "Searched pin:%s\n", dbg->pin_name);

		seq_printf(s, "Use: modify config_pin <devname> "\

				"<state> <pinname> <value>\n");

		goto exit;

	}

	pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name);

	seq_printf(s, "Dev %s has config of %s in state %s:\n",

		   dbg->dev_name, dbg->pin_name, dbg->state_name);

	pinconf_show_config(s, pctldev, found->data.configs.configs,

			    found->data.configs.num_configs);

exit:

	mutex_unlock(&pinctrl_maps_mutex);

	return 0;

}

/**

 * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl

 * map, of a dev/pin/state entry based on user entries to pinconf-config

 * @user_buf: contains the modification request with expected format:

 *     modify <config> <devicename> <state> <name> <newvalue>

 * modify is literal string, alternatives like add/delete not supported yet

 * <config> is the configuration to be changed. Supported configs are

 *     "config_pin" or "config_group", alternatives like config_mux are not

 *     supported yet.

 * <devicename> <state> <name> are values that should match the pinctrl-maps

 * <newvalue> reflects the new config and is driver dependent

 */

static ssize_t pinconf_dbg_config_write(struct file *file,

	const char __user *user_buf, size_t count, loff_t *ppos)

{

	struct pinctrl_maps *maps_node;

	const struct pinctrl_map *map;

	const struct pinctrl_map *found = NULL;

	struct pinctrl_dev *pctldev;

	const struct pinconf_ops *confops = NULL;

	struct dbg_cfg *dbg = &pinconf_dbg_conf;

	const struct pinctrl_map_configs *configs;

	char config[MAX_NAME_LEN + 1];

	char buf[128];

	char *b = &buf[0];

	int buf_size;

	char *token;

	int i;

	/* Get userspace string and assure termination */

	buf_size = min(count, sizeof(buf) - 1);

	if (copy_from_user(buf, user_buf, buf_size))

		return -EFAULT;

	buf[buf_size] = 0;

	/*

	 * need to parse entry and extract parameters:

	 * modify configs_pin devicename state pinname newvalue

	 */

	/* Get arg: 'modify' */

	token = strsep(&b, " ");

	if (!token)

		return -EINVAL;

	if (strcmp(token, "modify"))

		return -EINVAL;

	/*

	 * Get arg type: "config_pin" and "config_group"

	 *                types are supported so far

	 */

	token = strsep(&b, " ");

	if (!token)

		return -EINVAL;

	if (!strcmp(token, "config_pin"))

		dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN;

	else if (!strcmp(token, "config_group"))

		dbg->map_type = PIN_MAP_TYPE_CONFIGS_GROUP;

	else

		return -EINVAL;

	/* get arg 'device_name' */

	token = strsep(&b, " ");

	if (!token)

		return -EINVAL;

	if (strlen(token) >= MAX_NAME_LEN)

		return -EINVAL;

	strncpy(dbg->dev_name, token, MAX_NAME_LEN);

	/* get arg 'state_name' */

	token = strsep(&b, " ");

	if (!token)

		return -EINVAL;

	if (strlen(token) >= MAX_NAME_LEN)

		return -EINVAL;

	strncpy(dbg->state_name, token, MAX_NAME_LEN);

	/* get arg 'pin_name' */

	token = strsep(&b, " ");

	if (!token)

		return -EINVAL;

	if (strlen(token) >= MAX_NAME_LEN)

		return -EINVAL;

	strncpy(dbg->pin_name, token, MAX_NAME_LEN);

	/* get new_value of config' */

	token = strsep(&b, " ");

	if (!token)

		return -EINVAL;

	if (strlen(token) >= MAX_NAME_LEN)

		return -EINVAL;

	strncpy(config, token, MAX_NAME_LEN);

	mutex_lock(&pinctrl_maps_mutex);

	/* Parse the pinctrl map and look for the selected dev/state/pin */

	for_each_maps(maps_node, i, map) {

		if (strcmp(map->dev_name, dbg->dev_name))

			continue;

		if (map->type != dbg->map_type)

			continue;

		if (strcmp(map->name, dbg->state_name))

			continue;

		/*  we found the right pin / state, so overwrite config */

		if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) {

			found = map;

			break;

		}

	}

	if (!found) {

		count = -EINVAL;

		goto exit;

	}

	pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name);

	if (pctldev)

		confops = pctldev->desc->confops;

	if (confops && confops->pin_config_dbg_parse_modify) {

		configs = &found->data.configs;

		for (i = 0; i < configs->num_configs; i++) {

			confops->pin_config_dbg_parse_modify(pctldev,

						     config,

						     &configs->configs[i]);

		}

	}

exit:

	mutex_unlock(&pinctrl_maps_mutex);

	return count;

}

static int pinconf_dbg_config_open(struct inode *inode, struct file *file)

{

	return single_open(file, pinconf_dbg_config_print, inode->i_private);

}

static const struct file_operations pinconf_dbg_pinconfig_fops = {

	.open = pinconf_dbg_config_open,

	.write = pinconf_dbg_config_write,

	.read = seq_read,

	.llseek = seq_lseek,

	.release = single_release,

	.owner = THIS_MODULE,

};

void pinconf_init_device_debugfs(struct dentry *devroot,

			 struct pinctrl_dev *pctldev)

{

			    devroot, pctldev, &pinconf_pins_fops);

	debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO,

			    devroot, pctldev, &pinconf_groups_fops);

	debugfs_create_file("pinconf-config",  (S_IRUGO | S_IWUSR | S_IWGRP),

			    devroot, pctldev, &pinconf_dbg_pinconfig_fops);

}

#endif

 * @pin_config_group_get: get configurations for an entire pin group; should

 *	return -ENOTSUPP and -EINVAL using the same rules as pin_config_get.

 * @pin_config_group_set: configure all pins in a group

 * @pin_config_dbg_parse_modify: optional debugfs to modify a pin configuration

 * @pin_config_dbg_show: optional debugfs display hook that will provide

 *	per-device info for a certain pin in debugfs

 * @pin_config_group_dbg_show: optional debugfs display hook that will provide

				     unsigned selector,

				     unsigned long *configs,

				     unsigned num_configs);

	int (*pin_config_dbg_parse_modify) (struct pinctrl_dev *pctldev,

					   const char *arg,

					   unsigned long *config);

	void (*pin_config_dbg_show) (struct pinctrl_dev *pctldev,

				     struct seq_file *s,

				     unsigned offset);