Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 556 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinconf.c b/drivers/pinctrl/pinconf.c
new file mode 100644
index 00000000..7321e860
--- /dev/null
+++ b/drivers/pinctrl/pinconf.c
@@ -0,0 +1,556 @@
+/*
+ * 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/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 must be able to read out pin status */
+	if (!ops->pin_config_get && !ops->pin_config_group_get)
+		return -EINVAL;
+	/* We have to be able to config the pins in SOME way */
+	if (!ops->pin_config_set && !ops->pin_config_group_set)
+		return -EINVAL;
+	return 0;
+}
+
+int pinconf_validate_map(struct pinctrl_map const *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 ptr 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_err(pctldev->dev, "cannot get pin configuration, missing "
+			"pin_config_get() function in driver\n");
+		return -EINVAL;
+	}
+
+	return ops->pin_config_get(pctldev, pin, config);
+}
+
+/**
+ * pin_config_get() - get the configuration of a single pin parameter
+ * @dev_name: name of the pin controller device for this pin
+ * @name: name of the pin to get the config for
+ * @config: the config pointed to by this argument will be filled in with the
+ *	current pin state, it can be used directly by drivers as a numeral, or
+ *	it can be dereferenced to any struct.
+ */
+int pin_config_get(const char *dev_name, const char *name,
+			  unsigned long *config)
+{
+	struct pinctrl_dev *pctldev;
+	int pin;
+
+	mutex_lock(&pinctrl_mutex);
+
+	pctldev = get_pinctrl_dev_from_devname(dev_name);
+	if (!pctldev) {
+		pin = -EINVAL;
+		goto unlock;
+	}
+
+	pin = pin_get_from_name(pctldev, name);
+	if (pin < 0)
+		goto unlock;
+
+	pin = pin_config_get_for_pin(pctldev, pin, config);
+
+unlock:
+	mutex_unlock(&pinctrl_mutex);
+	return pin;
+}
+EXPORT_SYMBOL(pin_config_get);
+
+static int pin_config_set_for_pin(struct pinctrl_dev *pctldev, unsigned pin,
+			   unsigned long config)
+{
+	const struct pinconf_ops *ops = pctldev->desc->confops;
+	int ret;
+
+	if (!ops || !ops->pin_config_set) {
+		dev_err(pctldev->dev, "cannot configure pin, missing "
+			"config function in driver\n");
+		return -EINVAL;
+	}
+
+	ret = ops->pin_config_set(pctldev, pin, config);
+	if (ret) {
+		dev_err(pctldev->dev,
+			"unable to set pin configuration on pin %d\n", pin);
+		return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * pin_config_set() - set the configuration of a single pin parameter
+ * @dev_name: name of pin controller device for this pin
+ * @name: name of the pin to set the config for
+ * @config: the config in this argument will contain the desired pin state, it
+ *	can be used directly by drivers as a numeral, or it can be dereferenced
+ *	to any struct.
+ */
+int pin_config_set(const char *dev_name, const char *name,
+		   unsigned long config)
+{
+	struct pinctrl_dev *pctldev;
+	int pin, ret;
+
+	mutex_lock(&pinctrl_mutex);
+
+	pctldev = get_pinctrl_dev_from_devname(dev_name);
+	if (!pctldev) {
+		ret = -EINVAL;
+		goto unlock;
+	}
+
+	pin = pin_get_from_name(pctldev, name);
+	if (pin < 0) {
+		ret = pin;
+		goto unlock;
+	}
+
+	ret = pin_config_set_for_pin(pctldev, pin, config);
+
+unlock:
+	mutex_unlock(&pinctrl_mutex);
+	return ret;
+}
+EXPORT_SYMBOL(pin_config_set);
+
+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;
+
+	mutex_lock(&pinctrl_mutex);
+
+	pctldev = get_pinctrl_dev_from_devname(dev_name);
+	if (!pctldev) {
+		ret = -EINVAL;
+		goto unlock;
+	}
+	ops = pctldev->desc->confops;
+
+	if (!ops || !ops->pin_config_group_get) {
+		dev_err(pctldev->dev, "cannot get configuration for pin "
+			"group, missing group config get function in "
+			"driver\n");
+		ret = -EINVAL;
+		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(&pinctrl_mutex);
+	return ret;
+}
+EXPORT_SYMBOL(pin_config_group_get);
+
+int pin_config_group_set(const char *dev_name, const char *pin_group,
+			 unsigned long config)
+{
+	struct pinctrl_dev *pctldev;
+	const struct pinconf_ops *ops;
+	const struct pinctrl_ops *pctlops;
+	int selector;
+	const unsigned *pins;
+	unsigned num_pins;
+	int ret;
+	int i;
+
+	mutex_lock(&pinctrl_mutex);
+
+	pctldev = get_pinctrl_dev_from_devname(dev_name);
+	if (!pctldev) {
+		ret = -EINVAL;
+		goto unlock;
+	}
+	ops = pctldev->desc->confops;
+	pctlops = pctldev->desc->pctlops;
+
+	if (!ops || (!ops->pin_config_group_set && !ops->pin_config_set)) {
+		dev_err(pctldev->dev, "cannot configure pin group, missing "
+			"config function in driver\n");
+		ret = -EINVAL;
+		goto unlock;
+	}
+
+	selector = pinctrl_get_group_selector(pctldev, pin_group);
+	if (selector < 0) {
+		ret = selector;
+		goto unlock;
+	}
+
+	ret = pctlops->get_group_pins(pctldev, selector, &pins, &num_pins);
+	if (ret) {
+		dev_err(pctldev->dev, "cannot configure pin group, error "
+			"getting pins\n");
+		goto unlock;
+	}
+
+	/*
+	 * If the pin controller supports handling entire groups we use that
+	 * capability.
+	 */
+	if (ops->pin_config_group_set) {
+		ret = ops->pin_config_group_set(pctldev, selector, config);
+		/*
+		 * If the pin controller prefer that a certain group be handled
+		 * pin-by-pin as well, it returns -EAGAIN.
+		 */
+		if (ret != -EAGAIN)
+			goto unlock;
+	}
+
+	/*
+	 * If the controller cannot handle entire groups, we configure each pin
+	 * individually.
+	 */
+	if (!ops->pin_config_set) {
+		ret = 0;
+		goto unlock;
+	}
+
+	for (i = 0; i < num_pins; i++) {
+		ret = ops->pin_config_set(pctldev, pins[i], config);
+		if (ret < 0)
+			goto unlock;
+	}
+
+	ret = 0;
+
+unlock:
+	mutex_unlock(&pinctrl_mutex);
+
+	return ret;
+}
+EXPORT_SYMBOL(pin_config_group_set);
+
+int pinconf_map_to_setting(struct pinctrl_map const *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(struct pinctrl_setting const *setting)
+{
+}
+
+int pinconf_apply_setting(struct pinctrl_setting const *setting)
+{
+	struct pinctrl_dev *pctldev = setting->pctldev;
+	const struct pinconf_ops *ops = pctldev->desc->confops;
+	int i, 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;
+		}
+		for (i = 0; i < setting->data.configs.num_configs; i++) {
+			ret = ops->pin_config_set(pctldev,
+					setting->data.configs.group_or_pin,
+					setting->data.configs.configs[i]);
+			if (ret < 0) {
+				dev_err(pctldev->dev,
+					"pin_config_set op failed for pin %d config %08lx\n",
+					setting->data.configs.group_or_pin,
+					setting->data.configs.configs[i]);
+				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;
+		}
+		for (i = 0; i < setting->data.configs.num_configs; i++) {
+			ret = ops->pin_config_group_set(pctldev,
+					setting->data.configs.group_or_pin,
+					setting->data.configs.configs[i]);
+			if (ret < 0) {
+				dev_err(pctldev->dev,
+					"pin_config_group_set op failed for group %d config %08lx\n",
+					setting->data.configs.group_or_pin,
+					setting->data.configs.configs[i]);
+				return ret;
+			}
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map)
+{
+	int i;
+
+	switch (map->type) {
+	case PIN_MAP_TYPE_CONFIGS_PIN:
+		seq_printf(s, "pin ");
+		break;
+	case PIN_MAP_TYPE_CONFIGS_GROUP:
+		seq_printf(s, "group ");
+		break;
+	default:
+		break;
+	}
+
+	seq_printf(s, "%s\n", map->data.configs.group_or_pin);
+
+	for (i = 0; i < map->data.configs.num_configs; i++)
+		seq_printf(s, "config %08lx\n", map->data.configs.configs[i]);
+}
+
+void pinconf_show_setting(struct seq_file *s,
+			  struct pinctrl_setting const *setting)
+{
+	struct pinctrl_dev *pctldev = setting->pctldev;
+	const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
+	struct pin_desc *desc;
+	int i;
+
+	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 ? desc->name : "unnamed",
+			   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 controler to dump the config
+	 * values, so they can be decoded to something meaningful.
+	 */
+	for (i = 0; i < setting->data.configs.num_configs; i++)
+		seq_printf(s, " %08lx", setting->data.configs.configs[i]);
+
+	seq_printf(s, "\n");
+}
+
+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_pin(pctldev, s, 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): pinmux setting array\n");
+
+	mutex_lock(&pinctrl_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 == NULL)
+			continue;
+
+		seq_printf(s, "pin %d (%s):", pin,
+			   desc->name ? desc->name : "unnamed");
+
+		pinconf_dump_pin(pctldev, s, pin);
+
+		seq_printf(s, "\n");
+	}
+
+	mutex_unlock(&pinctrl_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_group(pctldev, s, gname);
+	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;
+	const struct pinconf_ops *ops = pctldev->desc->confops;
+	unsigned selector = 0;
+
+	if (!ops || !ops->pin_config_group_get)
+		return 0;
+
+	seq_puts(s, "Pin config settings per pin group\n");
+	seq_puts(s, "Format: group (name): pinmux setting array\n");
+
+	mutex_lock(&pinctrl_mutex);
+
+	while (pctlops->list_groups(pctldev, selector) >= 0) {
+		const char *gname = pctlops->get_group_name(pctldev, selector);
+
+		seq_printf(s, "%u (%s):", selector, gname);
+		pinconf_dump_group(pctldev, s, selector, gname);
+		seq_printf(s, "\n");
+
+		selector++;
+	}
+
+	mutex_unlock(&pinctrl_mutex);
+
+	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,
+};
+
+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);
+}
+
+#endif