Merge tag 'pinctrl-mergebase-20120418' into HEAD

Conflicts:
	drivers/pinctrl/core.c

15 files changed, 766 insertions, 132 deletions

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index abfb9640877..f73a5ea8975 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -4,7 +4,6 @@
 
 config PINCTRL
 	bool
-	depends on EXPERIMENTAL
 
 if PINCTRL
 
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 6d4150b4ece..8e3c95a02fb 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -5,6 +5,9 @@ ccflags-$(CONFIG_DEBUG_PINCTRL)	+= -DDEBUG
 obj-$(CONFIG_PINCTRL)		+= core.o
 obj-$(CONFIG_PINMUX)		+= pinmux.o
 obj-$(CONFIG_PINCONF)		+= pinconf.o
+ifeq ($(CONFIG_OF),y)
+obj-$(CONFIG_PINCTRL)		+= devicetree.o
+endif
 obj-$(CONFIG_GENERIC_PINCONF)	+= pinconf-generic.o
 obj-$(CONFIG_PINCTRL_PXA3xx)	+= pinctrl-pxa3xx.o
 obj-$(CONFIG_PINCTRL_MMP2)	+= pinctrl-mmp2.o
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index df6296c5f47..5cd5a5a3a40 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -23,9 +23,11 @@
 #include <linux/sysfs.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
+#include <linux/pinctrl/consumer.h>
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/pinctrl/machine.h>
 #include "core.h"
+#include "devicetree.h"
 #include "pinmux.h"
 #include "pinconf.h"
 
@@ -45,7 +47,7 @@ struct pinctrl_maps {
 DEFINE_MUTEX(pinctrl_mutex);
 
 /* Global list of pin control devices (struct pinctrl_dev) */
-static LIST_HEAD(pinctrldev_list);
+LIST_HEAD(pinctrldev_list);
 
 /* List of pin controller handles (struct pinctrl) */
 static LIST_HEAD(pinctrl_list);
@@ -124,6 +126,25 @@ int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name)
 }
 
 /**
+ * pin_get_name_from_id() - look up a pin name from a pin id
+ * @pctldev: the pin control device to lookup the pin on
+ * @name: the name of the pin to look up
+ */
+const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin)
+{
+	const struct pin_desc *desc;
+
+	desc = pin_desc_get(pctldev, pin);
+	if (desc == NULL) {
+		dev_err(pctldev->dev, "failed to get pin(%d) name\n",
+			pin);
+		return NULL;
+	}
+
+	return desc->name;
+}
+
+/**
  * pin_is_valid() - check if pin exists on controller
  * @pctldev: the pin control device to check the pin on
  * @pin: pin to check, use the local pin controller index number
@@ -318,9 +339,10 @@ int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
 			       const char *pin_group)
 {
 	const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
+	unsigned ngroups = pctlops->get_groups_count(pctldev);
 	unsigned group_selector = 0;
 
-	while (pctlops->list_groups(pctldev, group_selector) >= 0) {
+	while (group_selector < ngroups) {
 		const char *gname = pctlops->get_group_name(pctldev,
 							    group_selector);
 		if (!strcmp(gname, pin_group)) {
@@ -516,11 +538,14 @@ static int add_setting(struct pinctrl *p, struct pinctrl_map const *map)
 
 	setting->pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name);
 	if (setting->pctldev == NULL) {
-		dev_err(p->dev, "unknown pinctrl device %s in map entry",
+		dev_info(p->dev, "unknown pinctrl device %s in map entry, deferring probe",
 			map->ctrl_dev_name);
 		kfree(setting);
-		/* Eventually, this should trigger deferred probe */
-		return -ENODEV;
+		/*
+		 * OK let us guess that the driver is not there yet, and
+		 * let's defer obtaining this pinctrl handle to later...
+		 */
+		return -EPROBE_DEFER;
 	}
 
 	switch (map->type) {
@@ -579,6 +604,13 @@ static struct pinctrl *create_pinctrl(struct device *dev)
 	}
 	p->dev = dev;
 	INIT_LIST_HEAD(&p->states);
+	INIT_LIST_HEAD(&p->dt_maps);
+
+	ret = pinctrl_dt_to_map(p);
+	if (ret < 0) {
+		kfree(p);
+		return ERR_PTR(ret);
+	}
 
 	devname = dev_name(dev);
 
@@ -662,6 +694,8 @@ static void pinctrl_put_locked(struct pinctrl *p, bool inlist)
 		kfree(state);
 	}
 
+	pinctrl_dt_free_maps(p);
+
 	if (inlist)
 		list_del(&p->node);
 	kfree(p);
@@ -787,15 +821,63 @@ int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *state)
 }
 EXPORT_SYMBOL_GPL(pinctrl_select_state);
 
+static void devm_pinctrl_release(struct device *dev, void *res)
+{
+	pinctrl_put(*(struct pinctrl **)res);
+}
+
 /**
- * pinctrl_register_mappings() - register a set of pin controller mappings
- * @maps: the pincontrol mappings table to register. This should probably be
- *	marked with __initdata so it can be discarded after boot. This
- *	function will perform a shallow copy for the mapping entries.
- * @num_maps: the number of maps in the mapping table
+ * struct devm_pinctrl_get() - Resource managed pinctrl_get()
+ * @dev: the device to obtain the handle for
+ *
+ * If there is a need to explicitly destroy the returned struct pinctrl,
+ * devm_pinctrl_put() should be used, rather than plain pinctrl_put().
  */
-int pinctrl_register_mappings(struct pinctrl_map const *maps,
-			      unsigned num_maps)
+struct pinctrl *devm_pinctrl_get(struct device *dev)
+{
+	struct pinctrl **ptr, *p;
+
+	ptr = devres_alloc(devm_pinctrl_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return ERR_PTR(-ENOMEM);
+
+	p = pinctrl_get(dev);
+	if (!IS_ERR(p)) {
+		*ptr = p;
+		devres_add(dev, ptr);
+	} else {
+		devres_free(ptr);
+	}
+
+	return p;
+}
+EXPORT_SYMBOL_GPL(devm_pinctrl_get);
+
+static int devm_pinctrl_match(struct device *dev, void *res, void *data)
+{
+	struct pinctrl **p = res;
+
+	return *p == data;
+}
+
+/**
+ * devm_pinctrl_put() - Resource managed pinctrl_put()
+ * @p: the pinctrl handle to release
+ *
+ * Deallocate a struct pinctrl obtained via devm_pinctrl_get(). Normally
+ * this function will not need to be called and the resource management
+ * code will ensure that the resource is freed.
+ */
+void devm_pinctrl_put(struct pinctrl *p)
+{
+	WARN_ON(devres_destroy(p->dev, devm_pinctrl_release,
+			       devm_pinctrl_match, p));
+	pinctrl_put(p);
+}
+EXPORT_SYMBOL_GPL(devm_pinctrl_put);
+
+int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
+			 bool dup, bool locked)
 {
 	int i, ret;
 	struct pinctrl_maps *maps_node;
@@ -851,20 +933,52 @@ int pinctrl_register_mappings(struct pinctrl_map const *maps,
 	}
 
 	maps_node->num_maps = num_maps;
-	maps_node->maps = kmemdup(maps, sizeof(*maps) * num_maps, GFP_KERNEL);
-	if (!maps_node->maps) {
-		pr_err("failed to duplicate mapping table\n");
-		kfree(maps_node);
-		return -ENOMEM;
+	if (dup) {
+		maps_node->maps = kmemdup(maps, sizeof(*maps) * num_maps,
+					  GFP_KERNEL);
+		if (!maps_node->maps) {
+			pr_err("failed to duplicate mapping table\n");
+			kfree(maps_node);
+			return -ENOMEM;
+		}
+	} else {
+		maps_node->maps = maps;
 	}
 
-	mutex_lock(&pinctrl_mutex);
+	if (!locked)
+		mutex_lock(&pinctrl_mutex);
 	list_add_tail(&maps_node->node, &pinctrl_maps);
-	mutex_unlock(&pinctrl_mutex);
+	if (!locked)
+		mutex_unlock(&pinctrl_mutex);
 
 	return 0;
 }
 
+/**
+ * pinctrl_register_mappings() - register a set of pin controller mappings
+ * @maps: the pincontrol mappings table to register. This should probably be
+ *	marked with __initdata so it can be discarded after boot. This
+ *	function will perform a shallow copy for the mapping entries.
+ * @num_maps: the number of maps in the mapping table
+ */
+int pinctrl_register_mappings(struct pinctrl_map const *maps,
+			      unsigned num_maps)
+{
+	return pinctrl_register_map(maps, num_maps, true, false);
+}
+
+void pinctrl_unregister_map(struct pinctrl_map const *map)
+{
+	struct pinctrl_maps *maps_node;
+
+	list_for_each_entry(maps_node, &pinctrl_maps, node) {
+		if (maps_node->maps == map) {
+			list_del(&maps_node->node);
+			return;
+		}
+	}
+}
+
 #ifdef CONFIG_DEBUG_FS
 
 static int pinctrl_pins_show(struct seq_file *s, void *what)
@@ -906,15 +1020,17 @@ static int pinctrl_groups_show(struct seq_file *s, void *what)
 {
 	struct pinctrl_dev *pctldev = s->private;
 	const struct pinctrl_ops *ops = pctldev->desc->pctlops;
-	unsigned selector = 0;
+	unsigned ngroups, selector = 0;
 
+	ngroups = ops->get_groups_count(pctldev);
 	mutex_lock(&pinctrl_mutex);
 
 	seq_puts(s, "registered pin groups:\n");
-	while (ops->list_groups(pctldev, selector) >= 0) {
+	while (selector < ngroups) {
 		const unsigned *pins;
 		unsigned num_pins;
 		const char *gname = ops->get_group_name(pctldev, selector);
+		const char *pname;
 		int ret;
 		int i;
 
@@ -924,10 +1040,14 @@ static int pinctrl_groups_show(struct seq_file *s, void *what)
 			seq_printf(s, "%s [ERROR GETTING PINS]\n",
 				   gname);
 		else {
-			seq_printf(s, "group: %s, pins = [ ", gname);
-			for (i = 0; i < num_pins; i++)
-				seq_printf(s, "%d ", pins[i]);
-			seq_puts(s, "]\n");
+			seq_printf(s, "group: %s\n", gname);
+			for (i = 0; i < num_pins; i++) {
+				pname = pin_get_name(pctldev, pins[i]);
+				if (WARN_ON(!pname))
+					return -EINVAL;
+				seq_printf(s, "pin %d (%s)\n", pins[i], pname);
+			}
+			seq_puts(s, "\n");
 		}
 		selector++;
 	}
@@ -1226,11 +1346,14 @@ static int pinctrl_check_ops(struct pinctrl_dev *pctldev)
 	const struct pinctrl_ops *ops = pctldev->desc->pctlops;
 
 	if (!ops ||
-	    !ops->list_groups ||
+	    !ops->get_groups_count ||
 	    !ops->get_group_name ||
 	    !ops->get_group_pins)
 		return -EINVAL;
 
+	if (ops->dt_node_to_map && !ops->dt_free_map)
+		return -EINVAL;
+
 	return 0;
 }
 
diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
index 17ecf651b12..1f40ff68a8c 100644
--- a/drivers/pinctrl/core.h
+++ b/drivers/pinctrl/core.h
@@ -52,12 +52,15 @@ struct pinctrl_dev {
  * @dev: the device using this pin control handle
  * @states: a list of states for this device
  * @state: the current state
+ * @dt_maps: the mapping table chunks dynamically parsed from device tree for
+ *	this device, if any
  */
 struct pinctrl {
 	struct list_head node;
 	struct device *dev;
 	struct list_head states;
 	struct pinctrl_state *state;
+	struct list_head dt_maps;
 };
 
 /**
@@ -100,7 +103,8 @@ struct pinctrl_setting_configs {
  * struct pinctrl_setting - an individual mux or config setting
  * @node: list node for struct pinctrl_settings's @settings field
  * @type: the type of setting
- * @pctldev: pin control device handling to be programmed
+ * @pctldev: pin control device handling to be programmed. Not used for
+ *   PIN_MAP_TYPE_DUMMY_STATE.
  * @data: Data specific to the setting type
  */
 struct pinctrl_setting {
@@ -144,6 +148,7 @@ struct pin_desc {
 
 struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name);
 int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name);
+const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin);
 int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
 			       const char *pin_group);
 
@@ -153,4 +158,9 @@ static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev,
 	return radix_tree_lookup(&pctldev->pin_desc_tree, pin);
 }
 
+int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
+			 bool dup, bool locked);
+void pinctrl_unregister_map(struct pinctrl_map const *map);
+
 extern struct mutex pinctrl_mutex;
+extern struct list_head pinctrldev_list;
diff --git a/drivers/pinctrl/devicetree.c b/drivers/pinctrl/devicetree.c
new file mode 100644
index 00000000000..fcb1de45473
--- /dev/null
+++ b/drivers/pinctrl/devicetree.c
@@ -0,0 +1,249 @@
+/*
+ * Device tree integration for the pin control subsystem
+ *
+ * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/slab.h>
+
+#include "core.h"
+#include "devicetree.h"
+
+/**
+ * struct pinctrl_dt_map - mapping table chunk parsed from device tree
+ * @node: list node for struct pinctrl's @dt_maps field
+ * @pctldev: the pin controller that allocated this struct, and will free it
+ * @maps: the mapping table entries
+ */
+struct pinctrl_dt_map {
+	struct list_head node;
+	struct pinctrl_dev *pctldev;
+	struct pinctrl_map *map;
+	unsigned num_maps;
+};
+
+static void dt_free_map(struct pinctrl_dev *pctldev,
+		     struct pinctrl_map *map, unsigned num_maps)
+{
+	if (pctldev) {
+		struct pinctrl_ops *ops = pctldev->desc->pctlops;
+		ops->dt_free_map(pctldev, map, num_maps);
+	} else {
+		/* There is no pctldev for PIN_MAP_TYPE_DUMMY_STATE */
+		kfree(map);
+	}
+}
+
+void pinctrl_dt_free_maps(struct pinctrl *p)
+{
+	struct pinctrl_dt_map *dt_map, *n1;
+
+	list_for_each_entry_safe(dt_map, n1, &p->dt_maps, node) {
+		pinctrl_unregister_map(dt_map->map);
+		list_del(&dt_map->node);
+		dt_free_map(dt_map->pctldev, dt_map->map,
+			    dt_map->num_maps);
+		kfree(dt_map);
+	}
+
+	of_node_put(p->dev->of_node);
+}
+
+static int dt_remember_or_free_map(struct pinctrl *p, const char *statename,
+				   struct pinctrl_dev *pctldev,
+				   struct pinctrl_map *map, unsigned num_maps)
+{
+	int i;
+	struct pinctrl_dt_map *dt_map;
+
+	/* Initialize common mapping table entry fields */
+	for (i = 0; i < num_maps; i++) {
+		map[i].dev_name = dev_name(p->dev);
+		map[i].name = statename;
+		if (pctldev)
+			map[i].ctrl_dev_name = dev_name(pctldev->dev);
+	}
+
+	/* Remember the converted mapping table entries */
+	dt_map = kzalloc(sizeof(*dt_map), GFP_KERNEL);
+	if (!dt_map) {
+		dev_err(p->dev, "failed to alloc struct pinctrl_dt_map\n");
+		dt_free_map(pctldev, map, num_maps);
+		return -ENOMEM;
+	}
+
+	dt_map->pctldev = pctldev;
+	dt_map->map = map;
+	dt_map->num_maps = num_maps;
+	list_add_tail(&dt_map->node, &p->dt_maps);
+
+	return pinctrl_register_map(map, num_maps, false, true);
+}
+
+static struct pinctrl_dev *find_pinctrl_by_of_node(struct device_node *np)
+{
+	struct pinctrl_dev *pctldev;
+
+	list_for_each_entry(pctldev, &pinctrldev_list, node)
+		if (pctldev->dev->of_node == np)
+			return pctldev;
+
+	return NULL;
+}
+
+static int dt_to_map_one_config(struct pinctrl *p, const char *statename,
+				struct device_node *np_config)
+{
+	struct device_node *np_pctldev;
+	struct pinctrl_dev *pctldev;
+	struct pinctrl_ops *ops;
+	int ret;
+	struct pinctrl_map *map;
+	unsigned num_maps;
+
+	/* Find the pin controller containing np_config */
+	np_pctldev = of_node_get(np_config);
+	for (;;) {
+		np_pctldev = of_get_next_parent(np_pctldev);
+		if (!np_pctldev || of_node_is_root(np_pctldev)) {
+			dev_info(p->dev, "could not find pctldev for node %s, deferring probe\n",
+				np_config->full_name);
+			of_node_put(np_pctldev);
+			/* OK let's just assume this will appear later then */
+			return -EPROBE_DEFER;
+		}
+		pctldev = find_pinctrl_by_of_node(np_pctldev);
+		if (pctldev)
+			break;
+	}
+	of_node_put(np_pctldev);
+
+	/*
+	 * Call pinctrl driver to parse device tree node, and
+	 * generate mapping table entries
+	 */
+	ops = pctldev->desc->pctlops;
+	if (!ops->dt_node_to_map) {
+		dev_err(p->dev, "pctldev %s doesn't support DT\n",
+			dev_name(pctldev->dev));
+		return -ENODEV;
+	}
+	ret = ops->dt_node_to_map(pctldev, np_config, &map, &num_maps);
+	if (ret < 0)
+		return ret;
+
+	/* Stash the mapping table chunk away for later use */
+	return dt_remember_or_free_map(p, statename, pctldev, map, num_maps);
+}
+
+static int dt_remember_dummy_state(struct pinctrl *p, const char *statename)
+{
+	struct pinctrl_map *map;
+
+	map = kzalloc(sizeof(*map), GFP_KERNEL);
+	if (!map) {
+		dev_err(p->dev, "failed to alloc struct pinctrl_map\n");
+		return -ENOMEM;
+	}
+
+	/* There is no pctldev for PIN_MAP_TYPE_DUMMY_STATE */
+	map->type = PIN_MAP_TYPE_DUMMY_STATE;
+
+	return dt_remember_or_free_map(p, statename, NULL, map, 1);
+}
+
+int pinctrl_dt_to_map(struct pinctrl *p)
+{
+	struct device_node *np = p->dev->of_node;
+	int state, ret;
+	char *propname;
+	struct property *prop;
+	const char *statename;
+	const __be32 *list;
+	int size, config;
+	phandle phandle;
+	struct device_node *np_config;
+
+	/* CONFIG_OF enabled, p->dev not instantiated from DT */
+	if (!np) {
+		dev_dbg(p->dev, "no of_node; not parsing pinctrl DT\n");
+		return 0;
+	}
+
+	/* We may store pointers to property names within the node */
+	of_node_get(np);
+
+	/* For each defined state ID */
+	for (state = 0; ; state++) {
+		/* Retrieve the pinctrl-* property */
+		propname = kasprintf(GFP_KERNEL, "pinctrl-%d", state);
+		prop = of_find_property(np, propname, &size);
+		kfree(propname);
+		if (!prop)
+			break;
+		list = prop->value;
+		size /= sizeof(*list);
+
+		/* Determine whether pinctrl-names property names the state */
+		ret = of_property_read_string_index(np, "pinctrl-names",
+						    state, &statename);
+		/*
+		 * If not, statename is just the integer state ID. But rather
+		 * than dynamically allocate it and have to free it later,
+		 * just point part way into the property name for the string.
+		 */
+		if (ret < 0) {
+			/* strlen("pinctrl-") == 8 */
+			statename = prop->name + 8;
+		}
+
+		/* For every referenced pin configuration node in it */
+		for (config = 0; config < size; config++) {
+			phandle = be32_to_cpup(list++);
+
+			/* Look up the pin configuration node */
+			np_config = of_find_node_by_phandle(phandle);
+			if (!np_config) {
+				dev_err(p->dev,
+					"prop %s index %i invalid phandle\n",
+					prop->name, config);
+				ret = -EINVAL;
+				goto err;
+			}
+
+			/* Parse the node */
+			ret = dt_to_map_one_config(p, statename, np_config);
+			of_node_put(np_config);
+			if (ret < 0)
+				goto err;
+		}
+
+		/* No entries in DT? Generate a dummy state table entry */
+		if (!size) {
+			ret = dt_remember_dummy_state(p, statename);
+			if (ret < 0)
+				goto err;
+		}
+	}
+
+	return 0;
+
+err:
+	pinctrl_dt_free_maps(p);
+	return ret;
+}
diff --git a/drivers/pinctrl/devicetree.h b/drivers/pinctrl/devicetree.h
new file mode 100644
index 00000000000..760bc4960f5
--- /dev/null
+++ b/drivers/pinctrl/devicetree.h
@@ -0,0 +1,35 @@
+/*
+ * Internal interface to pinctrl device tree integration
+ *
+ * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef CONFIG_OF
+
+void pinctrl_dt_free_maps(struct pinctrl *p);
+int pinctrl_dt_to_map(struct pinctrl *p);
+
+#else
+
+static inline int pinctrl_dt_to_map(struct pinctrl *p)
+{
+	return 0;
+}
+
+static inline void pinctrl_dt_free_maps(struct pinctrl *p)
+{
+}
+
+#endif
diff --git a/drivers/pinctrl/pinconf.c b/drivers/pinctrl/pinconf.c
index 7321e860129..14f48c96b20 100644
--- a/drivers/pinctrl/pinconf.c
+++ b/drivers/pinctrl/pinconf.c
@@ -379,8 +379,16 @@ int pinconf_apply_setting(struct pinctrl_setting const *setting)
 
 void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map)
 {
+	struct pinctrl_dev *pctldev;
+	const struct pinconf_ops *confops;
 	int i;
 
+	pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name);
+	if (pctldev)
+		confops = pctldev->desc->confops;
+	else
+		confops = NULL;
+
 	switch (map->type) {
 	case PIN_MAP_TYPE_CONFIGS_PIN:
 		seq_printf(s, "pin ");
@@ -394,8 +402,15 @@ void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map)
 
 	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]);
+	for (i = 0; i < map->data.configs.num_configs; i++) {
+		seq_printf(s, "config ");
+		if (confops && confops->pin_config_config_dbg_show)
+			confops->pin_config_config_dbg_show(pctldev, s,
+						map->data.configs.configs[i]);
+		else
+			seq_printf(s, "%08lx", map->data.configs.configs[i]);
+		seq_printf(s, "\n");
+	}
 }
 
 void pinconf_show_setting(struct seq_file *s,
@@ -403,6 +418,7 @@ void pinconf_show_setting(struct seq_file *s,
 {
 	struct pinctrl_dev *pctldev = setting->pctldev;
 	const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
+	const struct pinconf_ops *confops = pctldev->desc->confops;
 	struct pin_desc *desc;
 	int i;
 
@@ -428,8 +444,15 @@ void pinconf_show_setting(struct seq_file *s,
 	 * 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]);
+	for (i = 0; i < setting->data.configs.num_configs; i++) {
+		seq_printf(s, " ");
+		if (confops && confops->pin_config_config_dbg_show)
+			confops->pin_config_config_dbg_show(pctldev, s,
+				setting->data.configs.configs[i]);
+		else
+			seq_printf(s, "%08lx",
+				   setting->data.configs.configs[i]);
+	}
 
 	seq_printf(s, "\n");
 }
@@ -448,10 +471,14 @@ static void pinconf_dump_pin(struct pinctrl_dev *pctldev,
 static int pinconf_pins_show(struct seq_file *s, void *what)
 {
 	struct pinctrl_dev *pctldev = s->private;
+	const struct pinconf_ops *ops = pctldev->desc->confops;
 	unsigned i, pin;
 
+	if (!ops || !ops->pin_config_get)
+		return 0;
+
 	seq_puts(s, "Pin config settings per pin\n");
-	seq_puts(s, "Format: pin (name): pinmux setting array\n");
+	seq_puts(s, "Format: pin (name): configs\n");
 
 	mutex_lock(&pinctrl_mutex);
 
@@ -495,17 +522,18 @@ 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 ngroups = pctlops->get_groups_count(pctldev);
 	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");
+	seq_puts(s, "Format: group (name): configs\n");
 
 	mutex_lock(&pinctrl_mutex);
 
-	while (pctlops->list_groups(pctldev, selector) >= 0) {
+	while (selector < ngroups) {
 		const char *gname = pctlops->get_group_name(pctldev, selector);
 
 		seq_printf(s, "%u (%s):", selector, gname);
diff --git a/drivers/pinctrl/pinconf.h b/drivers/pinctrl/pinconf.h
index 54510de5e8c..e3ed8cb072a 100644
--- a/drivers/pinctrl/pinconf.h
+++ b/drivers/pinctrl/pinconf.h
@@ -19,11 +19,6 @@ int pinconf_map_to_setting(struct pinctrl_map const *map,
 			  struct pinctrl_setting *setting);
 void pinconf_free_setting(struct pinctrl_setting const *setting);
 int pinconf_apply_setting(struct pinctrl_setting const *setting);
-void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map);
-void pinconf_show_setting(struct seq_file *s,
-			  struct pinctrl_setting const *setting);
-void pinconf_init_device_debugfs(struct dentry *devroot,
-				 struct pinctrl_dev *pctldev);
 
 /*
  * You will only be interested in these if you're using PINCONF
@@ -61,6 +56,18 @@ static inline int pinconf_apply_setting(struct pinctrl_setting const *setting)
 	return 0;
 }
 
+#endif
+
+#if defined(CONFIG_PINCONF) && defined(CONFIG_DEBUG_FS)
+
+void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map);
+void pinconf_show_setting(struct seq_file *s,
+			  struct pinctrl_setting const *setting);
+void pinconf_init_device_debugfs(struct dentry *devroot,
+				 struct pinctrl_dev *pctldev);
+
+#else
+
 static inline void pinconf_show_map(struct seq_file *s,
 				    struct pinctrl_map const *map)
 {
diff --git a/drivers/pinctrl/pinctrl-coh901.c b/drivers/pinctrl/pinctrl-coh901.c
index 0797eba3e33..55697a5d748 100644
--- a/drivers/pinctrl/pinctrl-coh901.c
+++ b/drivers/pinctrl/pinctrl-coh901.c
@@ -174,7 +174,7 @@ struct u300_gpio_confdata {
 
 
 /* Initial configuration */
-static const struct __initdata u300_gpio_confdata
+static const struct __initconst u300_gpio_confdata
 bs335_gpio_config[BS335_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = {
 	/* Port 0, pins 0-7 */
 	{
@@ -255,7 +255,7 @@ bs335_gpio_config[BS335_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = {
 	}
 };
 
-static const struct __initdata u300_gpio_confdata
+static const struct __initconst u300_gpio_confdata
 bs365_gpio_config[BS365_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = {
 	/* Port 0, pins 0-7 */
 	{
diff --git a/drivers/pinctrl/pinctrl-pxa3xx.c b/drivers/pinctrl/pinctrl-pxa3xx.c
index 079dce0e93e..7644e42ac21 100644
--- a/drivers/pinctrl/pinctrl-pxa3xx.c
+++ b/drivers/pinctrl/pinctrl-pxa3xx.c
@@ -25,20 +25,18 @@ static struct pinctrl_gpio_range pxa3xx_pinctrl_gpio_range = {
 	.pin_base	= 0,
 };
 
-static int pxa3xx_list_groups(struct pinctrl_dev *pctrldev, unsigned selector)
+static int pxa3xx_get_groups_count(struct pinctrl_dev *pctrldev)
 {
 	struct pxa3xx_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
-	if (selector >= info->num_grps)
-		return -EINVAL;
-	return 0;
+
+	return info->num_grps;
 }
 
 static const char *pxa3xx_get_group_name(struct pinctrl_dev *pctrldev,
 					 unsigned selector)
 {
 	struct pxa3xx_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
-	if (selector >= info->num_grps)
-		return NULL;
+
 	return info->grps[selector].name;
 }
 
@@ -48,25 +46,23 @@ static int pxa3xx_get_group_pins(struct pinctrl_dev *pctrldev,
 				 unsigned *num_pins)
 {
 	struct pxa3xx_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
-	if (selector >= info->num_grps)
-		return -EINVAL;
+
 	*pins = info->grps[selector].pins;
 	*num_pins = info->grps[selector].npins;
 	return 0;
 }
 
 static struct pinctrl_ops pxa3xx_pctrl_ops = {
-	.list_groups	= pxa3xx_list_groups,
+	.get_groups_count = pxa3xx_get_groups_count,
 	.get_group_name	= pxa3xx_get_group_name,
 	.get_group_pins	= pxa3xx_get_group_pins,
 };
 
-static int pxa3xx_pmx_list_func(struct pinctrl_dev *pctrldev, unsigned func)
+static int pxa3xx_pmx_get_funcs_count(struct pinctrl_dev *pctrldev)
 {
 	struct pxa3xx_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
-	if (func >= info->num_funcs)
-		return -EINVAL;
-	return 0;
+
+	return info->num_funcs;
 }
 
 static const char *pxa3xx_pmx_get_func_name(struct pinctrl_dev *pctrldev,
@@ -170,7 +166,7 @@ static int pxa3xx_pmx_request_gpio(struct pinctrl_dev *pctrldev,
 }
 
 static struct pinmux_ops pxa3xx_pmx_ops = {
-	.list_functions		= pxa3xx_pmx_list_func,
+	.get_functions_count	= pxa3xx_pmx_get_funcs_count,
 	.get_function_name	= pxa3xx_pmx_get_func_name,
 	.get_function_groups	= pxa3xx_pmx_get_groups,
 	.enable			= pxa3xx_pmx_enable,
diff --git a/drivers/pinctrl/pinctrl-sirf.c b/drivers/pinctrl/pinctrl-sirf.c
index 6b3534cc051..ba15b1a29e5 100644
--- a/drivers/pinctrl/pinctrl-sirf.c
+++ b/drivers/pinctrl/pinctrl-sirf.c
@@ -853,18 +853,14 @@ static const struct sirfsoc_pin_group sirfsoc_pin_groups[] = {
 	SIRFSOC_PIN_GROUP("gpsgrp", gps_pins),
 };
 
-static int sirfsoc_list_groups(struct pinctrl_dev *pctldev, unsigned selector)
+static int sirfsoc_get_groups_count(struct pinctrl_dev *pctldev)
 {
-	if (selector >= ARRAY_SIZE(sirfsoc_pin_groups))
-		return -EINVAL;
-	return 0;
+	return ARRAY_SIZE(sirfsoc_pin_groups);
 }
 
 static const char *sirfsoc_get_group_name(struct pinctrl_dev *pctldev,
 				       unsigned selector)
 {
-	if (selector >= ARRAY_SIZE(sirfsoc_pin_groups))
-		return NULL;
 	return sirfsoc_pin_groups[selector].name;
 }
 
@@ -872,8 +868,6 @@ static int sirfsoc_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector
 			       const unsigned **pins,
 			       unsigned *num_pins)
 {
-	if (selector >= ARRAY_SIZE(sirfsoc_pin_groups))
-		return -EINVAL;
 	*pins = sirfsoc_pin_groups[selector].pins;
 	*num_pins = sirfsoc_pin_groups[selector].num_pins;
 	return 0;
@@ -886,7 +880,7 @@ static void sirfsoc_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s
 }
 
 static struct pinctrl_ops sirfsoc_pctrl_ops = {
-	.list_groups = sirfsoc_list_groups,
+	.get_groups_count = sirfsoc_get_groups_count,
 	.get_group_name = sirfsoc_get_group_name,
 	.get_group_pins = sirfsoc_get_group_pins,
 	.pin_dbg_show = sirfsoc_pin_dbg_show,
@@ -1033,11 +1027,9 @@ static void sirfsoc_pinmux_disable(struct pinctrl_dev *pmxdev, unsigned selector
 	sirfsoc_pinmux_endisable(spmx, selector, false);
 }
 
-static int sirfsoc_pinmux_list_funcs(struct pinctrl_dev *pmxdev, unsigned selector)
+static int sirfsoc_pinmux_get_funcs_count(struct pinctrl_dev *pmxdev)
 {
-	if (selector >= ARRAY_SIZE(sirfsoc_pmx_functions))
-		return -EINVAL;
-	return 0;
+	return ARRAY_SIZE(sirfsoc_pmx_functions);
 }
 
 static const char *sirfsoc_pinmux_get_func_name(struct pinctrl_dev *pctldev,
@@ -1074,9 +1066,9 @@ static int sirfsoc_pinmux_request_gpio(struct pinctrl_dev *pmxdev,
 }
 
 static struct pinmux_ops sirfsoc_pinmux_ops = {
-	.list_functions = sirfsoc_pinmux_list_funcs,
 	.enable = sirfsoc_pinmux_enable,
 	.disable = sirfsoc_pinmux_disable,
+	.get_functions_count = sirfsoc_pinmux_get_funcs_count,
 	.get_function_name = sirfsoc_pinmux_get_func_name,
 	.get_function_groups = sirfsoc_pinmux_get_groups,
 	.gpio_request_enable = sirfsoc_pinmux_request_gpio,
diff --git a/drivers/pinctrl/pinctrl-tegra.c b/drivers/pinctrl/pinctrl-tegra.c
index 9b329688120..2c98fba01ca 100644
--- a/drivers/pinctrl/pinctrl-tegra.c
+++ b/drivers/pinctrl/pinctrl-tegra.c
@@ -23,9 +23,11 @@
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
+#include <linux/pinctrl/machine.h>
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/pinctrl/pinmux.h>
 #include <linux/pinctrl/pinconf.h>
+#include <linux/slab.h>
 
 #include <mach/pinconf-tegra.h>
 
@@ -53,15 +55,11 @@ static inline void pmx_writel(struct tegra_pmx *pmx, u32 val, u32 bank, u32 reg)
 	writel(val, pmx->regs[bank] + reg);
 }
 
-static int tegra_pinctrl_list_groups(struct pinctrl_dev *pctldev,
-				     unsigned group)
+static int tegra_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
 {
 	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 
-	if (group >= pmx->soc->ngroups)
-		return -EINVAL;
-
-	return 0;
+	return pmx->soc->ngroups;
 }
 
 static const char *tegra_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
@@ -69,9 +67,6 @@ static const char *tegra_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
 {
 	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 
-	if (group >= pmx->soc->ngroups)
-		return NULL;
-
 	return pmx->soc->groups[group].name;
 }
 
@@ -82,9 +77,6 @@ static int tegra_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
 {
 	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 
-	if (group >= pmx->soc->ngroups)
-		return -EINVAL;
-
 	*pins = pmx->soc->groups[group].pins;
 	*num_pins = pmx->soc->groups[group].npins;
 
@@ -98,22 +90,221 @@ static void tegra_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
 	seq_printf(s, " " DRIVER_NAME);
 }
 
+static int reserve_map(struct pinctrl_map **map, unsigned *reserved_maps,
+		       unsigned *num_maps, unsigned reserve)
+{
+	unsigned old_num = *reserved_maps;
+	unsigned new_num = *num_maps + reserve;
+	struct pinctrl_map *new_map;
+
+	if (old_num >= new_num)
+		return 0;
+
+	new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
+	if (!new_map)
+		return -ENOMEM;
+
+	memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
+
+	*map = new_map;
+	*reserved_maps = new_num;
+
+	return 0;
+}
+
+static int add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps,
+		       unsigned *num_maps, const char *group,
+		       const char *function)
+{
+	if (*num_maps == *reserved_maps)
+		return -ENOSPC;
+
+	(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
+	(*map)[*num_maps].data.mux.group = group;
+	(*map)[*num_maps].data.mux.function = function;
+	(*num_maps)++;
+
+	return 0;
+}
+
+static int add_map_configs(struct pinctrl_map **map, unsigned *reserved_maps,
+			   unsigned *num_maps, const char *group,
+			   unsigned long *configs, unsigned num_configs)
+{
+	unsigned long *dup_configs;
+
+	if (*num_maps == *reserved_maps)
+		return -ENOSPC;
+
+	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
+			      GFP_KERNEL);
+	if (!dup_configs)
+		return -ENOMEM;
+
+	(*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
+	(*map)[*num_maps].data.configs.group_or_pin = group;
+	(*map)[*num_maps].data.configs.configs = dup_configs;
+	(*map)[*num_maps].data.configs.num_configs = num_configs;
+	(*num_maps)++;
+
+	return 0;
+}
+
+static int add_config(unsigned long **configs, unsigned *num_configs,
+		      unsigned long config)
+{
+	unsigned old_num = *num_configs;
+	unsigned new_num = old_num + 1;
+	unsigned long *new_configs;
+
+	new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
+			       GFP_KERNEL);
+	if (!new_configs)
+		return -ENOMEM;
+
+	new_configs[old_num] = config;
+
+	*configs = new_configs;
+	*num_configs = new_num;
+
+	return 0;
+}
+
+void tegra_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
+			       struct pinctrl_map *map, unsigned num_maps)
+{
+	int i;
+
+	for (i = 0; i < num_maps; i++)
+		if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
+			kfree(map[i].data.configs.configs);
+
+	kfree(map);
+}
+
+static const struct cfg_param {
+	const char *property;
+	enum tegra_pinconf_param param;
+} cfg_params[] = {
+	{"nvidia,pull",			TEGRA_PINCONF_PARAM_PULL},
+	{"nvidia,tristate",		TEGRA_PINCONF_PARAM_TRISTATE},
+	{"nvidia,enable-input",		TEGRA_PINCONF_PARAM_ENABLE_INPUT},
+	{"nvidia,open-drain",		TEGRA_PINCONF_PARAM_OPEN_DRAIN},
+	{"nvidia,lock",			TEGRA_PINCONF_PARAM_LOCK},
+	{"nvidia,io-reset",		TEGRA_PINCONF_PARAM_IORESET},
+	{"nvidia,high-speed-mode",	TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE},
+	{"nvidia,schmitt",		TEGRA_PINCONF_PARAM_SCHMITT},
+	{"nvidia,low-power-mode",	TEGRA_PINCONF_PARAM_LOW_POWER_MODE},
+	{"nvidia,pull-down-strength",	TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH},
+	{"nvidia,pull-up-strength",	TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH},
+	{"nvidia,slew-rate-falling",	TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING},
+	{"nvidia,slew-rate-rising",	TEGRA_PINCONF_PARAM_SLEW_RATE_RISING},
+};
+
+int tegra_pinctrl_dt_subnode_to_map(struct device_node *np,
+				    struct pinctrl_map **map,
+				    unsigned *reserved_maps,
+				    unsigned *num_maps)
+{
+	int ret, i;
+	const char *function;
+	u32 val;
+	unsigned long config;
+	unsigned long *configs = NULL;
+	unsigned num_configs = 0;
+	unsigned reserve;
+	struct property *prop;
+	const char *group;
+
+	ret = of_property_read_string(np, "nvidia,function", &function);
+	if (ret < 0)
+		function = NULL;
+
+	for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
+		ret = of_property_read_u32(np, cfg_params[i].property, &val);
+		if (!ret) {
+			config = TEGRA_PINCONF_PACK(cfg_params[i].param, val);
+			ret = add_config(&configs, &num_configs, config);
+			if (ret < 0)
+				goto exit;
+		}
+	}
+
+	reserve = 0;
+	if (function != NULL)
+		reserve++;
+	if (num_configs)
+		reserve++;
+	ret = of_property_count_strings(np, "nvidia,pins");
+	if (ret < 0)
+		goto exit;
+	reserve *= ret;
+
+	ret = reserve_map(map, reserved_maps, num_maps, reserve);
+	if (ret < 0)
+		goto exit;
+
+	of_property_for_each_string(np, "nvidia,pins", prop, group) {
+		if (function) {
+			ret = add_map_mux(map, reserved_maps, num_maps,
+					  group, function);
+			if (ret < 0)
+				goto exit;
+		}
+
+		if (num_configs) {
+			ret = add_map_configs(map, reserved_maps, num_maps,
+					      group, configs, num_configs);
+			if (ret < 0)
+				goto exit;
+		}
+	}
+
+	ret = 0;
+
+exit:
+	kfree(configs);
+	return ret;
+}
+
+int tegra_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
+				 struct device_node *np_config,
+				 struct pinctrl_map **map, unsigned *num_maps)
+{
+	unsigned reserved_maps;
+	struct device_node *np;
+	int ret;
+
+	reserved_maps = 0;
+	*map = NULL;
+	*num_maps = 0;
+
+	for_each_child_of_node(np_config, np) {
+		ret = tegra_pinctrl_dt_subnode_to_map(np, map, &reserved_maps,
+						      num_maps);
+		if (ret < 0) {
+			tegra_pinctrl_dt_free_map(pctldev, *map, *num_maps);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
 static struct pinctrl_ops tegra_pinctrl_ops = {
-	.list_groups = tegra_pinctrl_list_groups,
+	.get_groups_count = tegra_pinctrl_get_groups_count,
 	.get_group_name = tegra_pinctrl_get_group_name,
 	.get_group_pins = tegra_pinctrl_get_group_pins,
 	.pin_dbg_show = tegra_pinctrl_pin_dbg_show,
+	.dt_node_to_map = tegra_pinctrl_dt_node_to_map,
+	.dt_free_map = tegra_pinctrl_dt_free_map,
 };
 
-static int tegra_pinctrl_list_funcs(struct pinctrl_dev *pctldev,
-				    unsigned function)
+static int tegra_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
 {
 	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 
-	if (function >= pmx->soc->nfunctions)
-		return -EINVAL;
-
-	return 0;
+	return pmx->soc->nfunctions;
 }
 
 static const char *tegra_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
@@ -121,9 +312,6 @@ static const char *tegra_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
 {
 	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 
-	if (function >= pmx->soc->nfunctions)
-		return NULL;
-
 	return pmx->soc->functions[function].name;
 }
 
@@ -134,9 +322,6 @@ static int tegra_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
 {
 	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 
-	if (function >= pmx->soc->nfunctions)
-		return -EINVAL;
-
 	*groups = pmx->soc->functions[function].groups;
 	*num_groups = pmx->soc->functions[function].ngroups;
 
@@ -151,8 +336,6 @@ static int tegra_pinctrl_enable(struct pinctrl_dev *pctldev, unsigned function,
 	int i;
 	u32 val;
 
-	if (group >= pmx->soc->ngroups)
-		return -EINVAL;
 	g = &pmx->soc->groups[group];
 
 	if (g->mux_reg < 0)
@@ -180,8 +363,6 @@ static void tegra_pinctrl_disable(struct pinctrl_dev *pctldev,
 	const struct tegra_pingroup *g;
 	u32 val;
 
-	if (group >= pmx->soc->ngroups)
-		return;
 	g = &pmx->soc->groups[group];
 
 	if (g->mux_reg < 0)
@@ -194,7 +375,7 @@ static void tegra_pinctrl_disable(struct pinctrl_dev *pctldev,
 }
 
 static struct pinmux_ops tegra_pinmux_ops = {
-	.list_functions = tegra_pinctrl_list_funcs,
+	.get_functions_count = tegra_pinctrl_get_funcs_count,
 	.get_function_name = tegra_pinctrl_get_func_name,
 	.get_function_groups = tegra_pinctrl_get_func_groups,
 	.enable = tegra_pinctrl_enable,
@@ -324,8 +505,6 @@ static int tegra_pinconf_group_get(struct pinctrl_dev *pctldev,
 	s16 reg;
 	u32 val, mask;
 
-	if (group >= pmx->soc->ngroups)
-		return -EINVAL;
 	g = &pmx->soc->groups[group];
 
 	ret = tegra_pinconf_reg(pmx, g, param, &bank, &reg, &bit, &width);
@@ -353,8 +532,6 @@ static int tegra_pinconf_group_set(struct pinctrl_dev *pctldev,
 	s16 reg;
 	u32 val, mask;
 
-	if (group >= pmx->soc->ngroups)
-		return -EINVAL;
 	g = &pmx->soc->groups[group];
 
 	ret = tegra_pinconf_reg(pmx, g, param, &bank, &reg, &bit, &width);
diff --git a/drivers/pinctrl/pinctrl-u300.c b/drivers/pinctrl/pinctrl-u300.c
index 26eb8ccd72d..05d029911be 100644
--- a/drivers/pinctrl/pinctrl-u300.c
+++ b/drivers/pinctrl/pinctrl-u300.c
@@ -836,18 +836,14 @@ static const struct u300_pin_group u300_pin_groups[] = {
 	},
 };
 
-static int u300_list_groups(struct pinctrl_dev *pctldev, unsigned selector)
+static int u300_get_groups_count(struct pinctrl_dev *pctldev)
 {
-	if (selector >= ARRAY_SIZE(u300_pin_groups))
-		return -EINVAL;
-	return 0;
+	return ARRAY_SIZE(u300_pin_groups);
 }
 
 static const char *u300_get_group_name(struct pinctrl_dev *pctldev,
 				       unsigned selector)
 {
-	if (selector >= ARRAY_SIZE(u300_pin_groups))
-		return NULL;
 	return u300_pin_groups[selector].name;
 }
 
@@ -855,8 +851,6 @@ static int u300_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
 			       const unsigned **pins,
 			       unsigned *num_pins)
 {
-	if (selector >= ARRAY_SIZE(u300_pin_groups))
-		return -EINVAL;
 	*pins = u300_pin_groups[selector].pins;
 	*num_pins = u300_pin_groups[selector].num_pins;
 	return 0;
@@ -869,7 +863,7 @@ static void u300_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 }
 
 static struct pinctrl_ops u300_pctrl_ops = {
-	.list_groups = u300_list_groups,
+	.get_groups_count = u300_get_groups_count,
 	.get_group_name = u300_get_group_name,
 	.get_group_pins = u300_get_group_pins,
 	.pin_dbg_show = u300_pin_dbg_show,
@@ -991,11 +985,9 @@ static void u300_pmx_disable(struct pinctrl_dev *pctldev, unsigned selector,
 	u300_pmx_endisable(upmx, selector, false);
 }
 
-static int u300_pmx_list_funcs(struct pinctrl_dev *pctldev, unsigned selector)
+static int u300_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
 {
-	if (selector >= ARRAY_SIZE(u300_pmx_functions))
-		return -EINVAL;
-	return 0;
+	return ARRAY_SIZE(u300_pmx_functions);
 }
 
 static const char *u300_pmx_get_func_name(struct pinctrl_dev *pctldev,
@@ -1014,7 +1006,7 @@ static int u300_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
 }
 
 static struct pinmux_ops u300_pmx_ops = {
-	.list_functions = u300_pmx_list_funcs,
+	.get_functions_count = u300_pmx_get_funcs_count,
 	.get_function_name = u300_pmx_get_func_name,
 	.get_function_groups = u300_pmx_get_groups,
 	.enable = u300_pmx_enable,
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index 4e62783a573..fa0357bd88f 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -33,10 +33,12 @@
 int pinmux_check_ops(struct pinctrl_dev *pctldev)
 {
 	const struct pinmux_ops *ops = pctldev->desc->pmxops;
+	unsigned nfuncs;
 	unsigned selector = 0;
 
 	/* Check that we implement required operations */
-	if (!ops->list_functions ||
+	if (!ops ||
+	    !ops->get_functions_count ||
 	    !ops->get_function_name ||
 	    !ops->get_function_groups ||
 	    !ops->enable ||
@@ -44,11 +46,12 @@ int pinmux_check_ops(struct pinctrl_dev *pctldev)
 		return -EINVAL;
 
 	/* Check that all functions registered have names */
-	while (ops->list_functions(pctldev, selector) >= 0) {
+	nfuncs = ops->get_functions_count(pctldev);
+	while (selector < nfuncs) {
 		const char *fname = ops->get_function_name(pctldev,
 							   selector);
 		if (!fname) {
-			pr_err("pinmux ops has no name for function%u\n",
+			dev_err(pctldev->dev, "pinmux ops has no name for function%u\n",
 				selector);
 			return -EINVAL;
 		}
@@ -85,8 +88,6 @@ static int pin_request(struct pinctrl_dev *pctldev,
 	const struct pinmux_ops *ops = pctldev->desc->pmxops;
 	int status = -EINVAL;
 
-	dev_dbg(pctldev->dev, "request pin %d for %s\n", pin, owner);
-
 	desc = pin_desc_get(pctldev, pin);
 	if (desc == NULL) {
 		dev_err(pctldev->dev,
@@ -94,6 +95,9 @@ static int pin_request(struct pinctrl_dev *pctldev,
 		goto out;
 	}
 
+	dev_dbg(pctldev->dev, "request pin %d (%s) for %s\n",
+		pin, desc->name, owner);
+
 	if (gpio_range) {
 		/* There's no need to support multiple GPIO requests */
 		if (desc->gpio_owner) {
@@ -287,10 +291,11 @@ static int pinmux_func_name_to_selector(struct pinctrl_dev *pctldev,
 					const char *function)
 {
 	const struct pinmux_ops *ops = pctldev->desc->pmxops;
+	unsigned nfuncs = ops->get_functions_count(pctldev);
 	unsigned selector = 0;
 
 	/* See if this pctldev has this function */
-	while (ops->list_functions(pctldev, selector) >= 0) {
+	while (selector < nfuncs) {
 		const char *fname = ops->get_function_name(pctldev,
 							   selector);
 
@@ -319,6 +324,11 @@ int pinmux_map_to_setting(struct pinctrl_map const *map,
 	const unsigned *pins;
 	unsigned num_pins;
 
+	if (!pmxops) {
+		dev_err(pctldev->dev, "does not support mux function\n");
+		return -EINVAL;
+	}
+
 	setting->data.mux.func =
 		pinmux_func_name_to_selector(pctldev, map->data.mux.function);
 	if (setting->data.mux.func < 0)
@@ -477,11 +487,15 @@ static int pinmux_functions_show(struct seq_file *s, void *what)
 {
 	struct pinctrl_dev *pctldev = s->private;
 	const struct pinmux_ops *pmxops = pctldev->desc->pmxops;
+	unsigned nfuncs;
 	unsigned func_selector = 0;
 
-	mutex_lock(&pinctrl_mutex);
+	if (!pmxops)
+		return 0;
 
-	while (pmxops->list_functions(pctldev, func_selector) >= 0) {
+	mutex_lock(&pinctrl_mutex);
+	nfuncs = pmxops->get_functions_count(pctldev);
+	while (func_selector < nfuncs) {
 		const char *func = pmxops->get_function_name(pctldev,
 							  func_selector);
 		const char * const *groups;
@@ -515,6 +529,9 @@ static int pinmux_pins_show(struct seq_file *s, void *what)
 	const struct pinmux_ops *pmxops = pctldev->desc->pmxops;
 	unsigned i, pin;
 
+	if (!pmxops)
+		return 0;
+
 	seq_puts(s, "Pinmux settings per pin\n");
 	seq_puts(s, "Format: pin (name): mux_owner gpio_owner hog?\n");
 
diff --git a/drivers/pinctrl/pinmux.h b/drivers/pinctrl/pinmux.h
index 6fc47003e95..d1a98b1c9fc 100644
--- a/drivers/pinctrl/pinmux.h
+++ b/drivers/pinctrl/pinmux.h
@@ -31,12 +31,6 @@ void pinmux_free_setting(struct pinctrl_setting const *setting);
 int pinmux_enable_setting(struct pinctrl_setting const *setting);
 void pinmux_disable_setting(struct pinctrl_setting const *setting);
 
-void pinmux_show_map(struct seq_file *s, struct pinctrl_map const *map);
-void pinmux_show_setting(struct seq_file *s,
-			 struct pinctrl_setting const *setting);
-void pinmux_init_device_debugfs(struct dentry *devroot,
-				struct pinctrl_dev *pctldev);
-
 #else
 
 static inline int pinmux_check_ops(struct pinctrl_dev *pctldev)
@@ -89,6 +83,18 @@ static inline void pinmux_disable_setting(
 {
 }
 
+#endif
+
+#if defined(CONFIG_PINMUX) && defined(CONFIG_DEBUG_FS)
+
+void pinmux_show_map(struct seq_file *s, struct pinctrl_map const *map);
+void pinmux_show_setting(struct seq_file *s,
+			 struct pinctrl_setting const *setting);
+void pinmux_init_device_debugfs(struct dentry *devroot,
+				struct pinctrl_dev *pctldev);
+
+#else
+
 static inline void pinmux_show_map(struct seq_file *s,
 				   struct pinctrl_map const *map)
 {