[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/pinctrl/pinconf.c b/src/kernel/linux/v4.14/drivers/pinctrl/pinconf.c
new file mode 100644
index 0000000..d3fe143
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/pinctrl/pinconf.c
@@ -0,0 +1,623 @@
+/*
+ * Core driver for the pin config portions of the pin control subsystem
+ *
+ * Copyright (C) 2011 ST-Ericsson SA
+ * Written on behalf of Linaro for ST-Ericsson
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#define pr_fmt(fmt) "pinconfig core: " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#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>
+#include "core.h"
+#include "pinconf.h"
+
+int pinconf_check_ops(struct pinctrl_dev *pctldev)
+{
+ const struct pinconf_ops *ops = pctldev->desc->confops;
+
+ /* We have to be able to config the pins in SOME way */
+ if (!ops->pin_config_set && !ops->pin_config_group_set) {
+ dev_err(pctldev->dev,
+ "pinconf has to be able to set a pins config\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+int pinconf_validate_map(const struct pinctrl_map *map, int i)
+{
+ if (!map->data.configs.group_or_pin) {
+ pr_err("failed to register map %s (%d): no group/pin given\n",
+ map->name, i);
+ return -EINVAL;
+ }
+
+ if (!map->data.configs.num_configs ||
+ !map->data.configs.configs) {
+ pr_err("failed to register map %s (%d): no configs given\n",
+ map->name, i);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long *config)
+{
+ const struct pinconf_ops *ops = pctldev->desc->confops;
+
+ if (!ops || !ops->pin_config_get) {
+ dev_dbg(pctldev->dev,
+ "cannot get pin configuration, .pin_config_get missing in driver\n");
+ return -ENOTSUPP;
+ }
+
+ return ops->pin_config_get(pctldev, pin, config);
+}
+
+int pin_config_group_get(const char *dev_name, const char *pin_group,
+ unsigned long *config)
+{
+ struct pinctrl_dev *pctldev;
+ const struct pinconf_ops *ops;
+ int selector, ret;
+
+ pctldev = get_pinctrl_dev_from_devname(dev_name);
+ if (!pctldev) {
+ ret = -EINVAL;
+ return ret;
+ }
+
+ mutex_lock(&pctldev->mutex);
+
+ ops = pctldev->desc->confops;
+
+ if (!ops || !ops->pin_config_group_get) {
+ dev_dbg(pctldev->dev,
+ "cannot get configuration for pin group, missing group config get function in driver\n");
+ ret = -ENOTSUPP;
+ goto unlock;
+ }
+
+ selector = pinctrl_get_group_selector(pctldev, pin_group);
+ if (selector < 0) {
+ ret = selector;
+ goto unlock;
+ }
+
+ ret = ops->pin_config_group_get(pctldev, selector, config);
+
+unlock:
+ mutex_unlock(&pctldev->mutex);
+ return ret;
+}
+
+int pinconf_map_to_setting(const struct pinctrl_map *map,
+ struct pinctrl_setting *setting)
+{
+ struct pinctrl_dev *pctldev = setting->pctldev;
+ int pin;
+
+ switch (setting->type) {
+ case PIN_MAP_TYPE_CONFIGS_PIN:
+ pin = pin_get_from_name(pctldev,
+ map->data.configs.group_or_pin);
+ if (pin < 0) {
+ dev_err(pctldev->dev, "could not map pin config for \"%s\"",
+ map->data.configs.group_or_pin);
+ return pin;
+ }
+ setting->data.configs.group_or_pin = pin;
+ break;
+ case PIN_MAP_TYPE_CONFIGS_GROUP:
+ pin = pinctrl_get_group_selector(pctldev,
+ map->data.configs.group_or_pin);
+ if (pin < 0) {
+ dev_err(pctldev->dev, "could not map group config for \"%s\"",
+ map->data.configs.group_or_pin);
+ return pin;
+ }
+ setting->data.configs.group_or_pin = pin;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ setting->data.configs.num_configs = map->data.configs.num_configs;
+ setting->data.configs.configs = map->data.configs.configs;
+
+ return 0;
+}
+
+void pinconf_free_setting(const struct pinctrl_setting *setting)
+{
+}
+
+int pinconf_apply_setting(const struct pinctrl_setting *setting)
+{
+ struct pinctrl_dev *pctldev = setting->pctldev;
+ const struct pinconf_ops *ops = pctldev->desc->confops;
+ int ret;
+
+ if (!ops) {
+ dev_err(pctldev->dev, "missing confops\n");
+ return -EINVAL;
+ }
+
+ switch (setting->type) {
+ case PIN_MAP_TYPE_CONFIGS_PIN:
+ if (!ops->pin_config_set) {
+ dev_err(pctldev->dev, "missing pin_config_set op\n");
+ return -EINVAL;
+ }
+ ret = ops->pin_config_set(pctldev,
+ setting->data.configs.group_or_pin,
+ setting->data.configs.configs,
+ setting->data.configs.num_configs);
+ if (ret < 0) {
+ dev_err(pctldev->dev,
+ "pin_config_set op failed for pin %d\n",
+ setting->data.configs.group_or_pin);
+ return ret;
+ }
+ break;
+ case PIN_MAP_TYPE_CONFIGS_GROUP:
+ if (!ops->pin_config_group_set) {
+ dev_err(pctldev->dev,
+ "missing pin_config_group_set op\n");
+ return -EINVAL;
+ }
+ ret = ops->pin_config_group_set(pctldev,
+ setting->data.configs.group_or_pin,
+ setting->data.configs.configs,
+ setting->data.configs.num_configs);
+ if (ret < 0) {
+ dev_err(pctldev->dev,
+ "pin_config_group_set op failed for group %d\n",
+ setting->data.configs.group_or_pin);
+ return ret;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int pinconf_set_config(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long *configs, size_t nconfigs)
+{
+ const struct pinconf_ops *ops;
+
+ ops = pctldev->desc->confops;
+ if (!ops || !ops->pin_config_set)
+ return -ENOTSUPP;
+
+ return ops->pin_config_set(pctldev, pin, configs, nconfigs);
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+static void pinconf_show_config(struct seq_file *s, struct pinctrl_dev *pctldev,
+ unsigned long *configs, unsigned num_configs)
+{
+ const struct pinconf_ops *confops;
+ int i;
+
+ if (pctldev)
+ confops = pctldev->desc->confops;
+ else
+ confops = NULL;
+
+ for (i = 0; i < num_configs; i++) {
+ seq_puts(s, "config ");
+ if (confops && confops->pin_config_config_dbg_show)
+ confops->pin_config_config_dbg_show(pctldev, s,
+ configs[i]);
+ else
+ seq_printf(s, "%08lx", configs[i]);
+ seq_putc(s, '\n');
+ }
+}
+
+void pinconf_show_map(struct seq_file *s, const struct pinctrl_map *map)
+{
+ struct pinctrl_dev *pctldev;
+
+ pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name);
+
+ switch (map->type) {
+ case PIN_MAP_TYPE_CONFIGS_PIN:
+ seq_puts(s, "pin ");
+ break;
+ case PIN_MAP_TYPE_CONFIGS_GROUP:
+ seq_puts(s, "group ");
+ break;
+ default:
+ break;
+ }
+
+ seq_printf(s, "%s\n", map->data.configs.group_or_pin);
+
+ pinconf_show_config(s, pctldev, map->data.configs.configs,
+ map->data.configs.num_configs);
+}
+
+void pinconf_show_setting(struct seq_file *s,
+ const struct pinctrl_setting *setting)
+{
+ struct pinctrl_dev *pctldev = setting->pctldev;
+ const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
+ struct pin_desc *desc;
+
+ switch (setting->type) {
+ case PIN_MAP_TYPE_CONFIGS_PIN:
+ desc = pin_desc_get(setting->pctldev,
+ setting->data.configs.group_or_pin);
+ seq_printf(s, "pin %s (%d)", desc->name,
+ setting->data.configs.group_or_pin);
+ break;
+ case PIN_MAP_TYPE_CONFIGS_GROUP:
+ seq_printf(s, "group %s (%d)",
+ pctlops->get_group_name(pctldev,
+ setting->data.configs.group_or_pin),
+ setting->data.configs.group_or_pin);
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * FIXME: We should really get the pin controller to dump the config
+ * values, so they can be decoded to something meaningful.
+ */
+ pinconf_show_config(s, pctldev, setting->data.configs.configs,
+ setting->data.configs.num_configs);
+}
+
+static void pinconf_dump_pin(struct pinctrl_dev *pctldev,
+ struct seq_file *s, int pin)
+{
+ const struct pinconf_ops *ops = pctldev->desc->confops;
+
+ /* no-op when not using generic pin config */
+ pinconf_generic_dump_pins(pctldev, s, NULL, pin);
+ if (ops && ops->pin_config_dbg_show)
+ ops->pin_config_dbg_show(pctldev, s, pin);
+}
+
+static int pinconf_pins_show(struct seq_file *s, void *what)
+{
+ struct pinctrl_dev *pctldev = s->private;
+ unsigned i, pin;
+
+ seq_puts(s, "Pin config settings per pin\n");
+ seq_puts(s, "Format: pin (name): configs\n");
+
+ mutex_lock(&pctldev->mutex);
+
+ /* The pin number can be retrived from the pin controller descriptor */
+ for (i = 0; i < pctldev->desc->npins; i++) {
+ struct pin_desc *desc;
+
+ pin = pctldev->desc->pins[i].number;
+ desc = pin_desc_get(pctldev, pin);
+ /* Skip if we cannot search the pin */
+ if (!desc)
+ continue;
+
+ seq_printf(s, "pin %d (%s): ", pin, desc->name);
+
+ pinconf_dump_pin(pctldev, s, pin);
+ seq_putc(s, '\n');
+ }
+
+ mutex_unlock(&pctldev->mutex);
+
+ return 0;
+}
+
+static void pinconf_dump_group(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned selector,
+ const char *gname)
+{
+ const struct pinconf_ops *ops = pctldev->desc->confops;
+
+ /* no-op when not using generic pin config */
+ pinconf_generic_dump_pins(pctldev, s, gname, 0);
+ if (ops && ops->pin_config_group_dbg_show)
+ ops->pin_config_group_dbg_show(pctldev, s, selector);
+}
+
+static int pinconf_groups_show(struct seq_file *s, void *what)
+{
+ struct pinctrl_dev *pctldev = s->private;
+ const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
+ unsigned ngroups = pctlops->get_groups_count(pctldev);
+ unsigned selector = 0;
+
+ seq_puts(s, "Pin config settings per pin group\n");
+ seq_puts(s, "Format: group (name): configs\n");
+
+ while (selector < ngroups) {
+ const char *gname = pctlops->get_group_name(pctldev, selector);
+
+ seq_printf(s, "%u (%s): ", selector, gname);
+ pinconf_dump_group(pctldev, s, selector, gname);
+ seq_putc(s, '\n');
+ selector++;
+ }
+
+ return 0;
+}
+
+static int pinconf_pins_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pinconf_pins_show, inode->i_private);
+}
+
+static int pinconf_groups_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pinconf_groups_show, inode->i_private);
+}
+
+static const struct file_operations pinconf_pins_ops = {
+ .open = pinconf_pins_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations pinconf_groups_ops = {
+ .open = pinconf_groups_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+#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)
+{
+ debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO,
+ devroot, pctldev, &pinconf_pins_ops);
+ debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO,
+ devroot, pctldev, &pinconf_groups_ops);
+ debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP),
+ devroot, pctldev, &pinconf_dbg_pinconfig_fops);
+}
+
+#endif