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path: root/drivers/pinctrl/pinconf.c
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Diffstat (limited to 'drivers/pinctrl/pinconf.c')
-rw-r--r--drivers/pinctrl/pinconf.c222
1 files changed, 0 insertions, 222 deletions
diff --git a/drivers/pinctrl/pinconf.c b/drivers/pinctrl/pinconf.c
index 2c7229380f08..2678603df14b 100644
--- a/drivers/pinctrl/pinconf.c
+++ b/drivers/pinctrl/pinconf.c
@@ -17,7 +17,6 @@
#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>
@@ -369,225 +368,6 @@ static int pinconf_groups_show(struct seq_file *s, void *what)
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)
{
@@ -595,8 +375,6 @@ void pinconf_init_device_debugfs(struct dentry *devroot,
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
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.