Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 386 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinconf.c b/drivers/pinctrl/pinconf.c
new file mode 100644
index 000000000..81686844d
--- /dev/null
+++ b/drivers/pinctrl/pinconf.c
@@ -0,0 +1,386 @@
+// 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/array_size.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.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 int 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 int 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 int 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 int 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 int 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 int selector = 0;
+	unsigned int ngroups;
+
+	if (!pctlops->get_groups_count || !pctlops->get_group_name)
+		return 0;
+
+	ngroups = pctlops->get_groups_count(pctldev);
+
+	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