Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 379 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinconf.c b/drivers/pinctrl/pinconf.c
new file mode 100644
index 0000000000..d9d5406547
--- /dev/null
+++ b/drivers/pinctrl/pinconf.c
@@ -0,0 +1,379 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 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>
+ */
+#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 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;
+}
+
+DEFINE_SHOW_ATTRIBUTE(pinconf_pins);
+DEFINE_SHOW_ATTRIBUTE(pinconf_groups);
+
+void pinconf_init_device_debugfs(struct dentry *devroot,
+			 struct pinctrl_dev *pctldev)
+{
+	debugfs_create_file("pinconf-pins", 0444,
+			    devroot, pctldev, &pinconf_pins_fops);
+	debugfs_create_file("pinconf-groups", 0444,
+			    devroot, pctldev, &pinconf_groups_fops);
+}
+
+#endif