Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted

Pull pin control updates from Linus Walleij:
 "Core changes:

   - Use the non-blocking mux_state_try_select() in the generic MUX pin
     control back-end

   - Free pin maps on pinctrl_generic_to_map() failure in the core
     helpers

  New hardware pin control:

   - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC
     (this is for the low power audio, LPASS = Low Power Audio SubSystem
     portions)

   - Upboard support on top of the Intel pin controller

   - Apple T6030 and T6031 support (just compatible strings)

   - Samsung Exynos 8855 SoC

   - Mediatek MT6858 SoC

   - Rockchip RK3308B and RV1106 SoCs

   - Airoha EN7523 and AN7563 SoCs

  Improvements:

   - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable

   - Qualcomm improvements on top of the Qualcomm PDC (power domain
     controller) irqchip improvements from tglx:s tree

   - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups

   - The NPCM8xx driver has been put into shape fixing many pin and
     group definitions

   - Some non-urgent Tegra 264 pin assignments are fixed up

   - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and
     pin assignments, missing features etc"

* tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits)
  dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema
  pinctrl: meson: sync some modify from A4
  pinctrl: meson: a4: Add input enable pin configuration
  pinctrl: realtek: rtd1625: remove unused group name spdif_sel
  pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13
  dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema
  Revert "Merge branch 'ib-rsk7204' into devel"
  pinctrl: rockchip: Add RV1106 pinctrl support
  dt-bindings: pinctrl: rockchip: Add RV1106 compatible
  pinctrl: rockchip: Decode drive strength in the get function
  pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable
  pinctrl: airoha: add support of an7563 SoC
  dt-bindings: pinctrl: airoha: add support of an7563 pin controller
  pinctrl: airoha: try to find chip scu node by phandle first
  pinctrl: airoha: add support of en7523 SoC
  dt-bindings: pinctrl: airoha: add support of en7523 pin controller
  pinctrl: airoha: an7583: add support for olt pinmux
  pinctrl: airoha: an7583: add support for pon_alt pinmux
  pinctrl: airoha: an7583: add support for npu_uart pinmux
  dt-bindings: pinctrl: airoha: an7583: add missed features
  ...

1 files changed, 319 insertions, 0 deletions

diff --git a/drivers/char/misc.c b/drivers/char/misc.c
new file mode 100644
index 000000000..726516fb0
--- /dev/null
+++ b/drivers/char/misc.c
@@ -0,0 +1,319 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/drivers/char/misc.c
+ *
+ * Generic misc open routine by Johan Myreen
+ *
+ * Based on code from Linus
+ *
+ * Teemu Rantanen's Microsoft Busmouse support and Derrick Cole's
+ *   changes incorporated into 0.97pl4
+ *   by Peter Cervasio (pete%q106fm.uucp@wupost.wustl.edu) (08SEP92)
+ *   See busmouse.c for particulars.
+ *
+ * Made things a lot mode modular - easy to compile in just one or two
+ * of the misc drivers, as they are now completely independent. Linus.
+ *
+ * Support for loadable modules. 8-Sep-95 Philip Blundell <pjb27@cam.ac.uk>
+ *
+ * Fixed a failing symbol register to free the device registration
+ *		Alan Cox <alan@lxorguk.ukuu.org.uk> 21-Jan-96
+ *
+ * Dynamic minors and /proc/mice by Alessandro Rubini. 26-Mar-96
+ *
+ * Renamed to misc and miscdevice to be more accurate. Alan Cox 26-Mar-96
+ *
+ * Handling of mouse minor numbers for kerneld:
+ *  Idea by Jacques Gelinas <jack@solucorp.qc.ca>,
+ *  adapted by Bjorn Ekwall <bj0rn@blox.se>
+ *  corrected by Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ * Changes for kmod (from kerneld):
+ *	Cyrus Durgin <cider@speakeasy.org>
+ *
+ * Added devfs support. Richard Gooch <rgooch@atnf.csiro.au>  10-Jan-1998
+ */
+
+#include <linux/module.h>
+
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/miscdevice.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/mutex.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/tty.h>
+#include <linux/kmod.h>
+#include <linux/gfp.h>
+
+/*
+ * Head entry for the doubly linked miscdevice list
+ */
+static LIST_HEAD(misc_list);
+static DEFINE_MUTEX(misc_mtx);
+
+/*
+ * Assigned numbers.
+ */
+static DEFINE_IDA(misc_minors_ida);
+
+static int misc_minor_alloc(int minor)
+{
+	int ret = 0;
+
+	if (minor == MISC_DYNAMIC_MINOR) {
+		/* allocate free id */
+		ret = ida_alloc_range(&misc_minors_ida, MISC_DYNAMIC_MINOR + 1,
+				      MINORMASK, GFP_KERNEL);
+	} else {
+		ret = ida_alloc_range(&misc_minors_ida, minor, minor, GFP_KERNEL);
+	}
+	return ret;
+}
+
+static void misc_minor_free(int minor)
+{
+	ida_free(&misc_minors_ida, minor);
+}
+
+#ifdef CONFIG_PROC_FS
+static void *misc_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	mutex_lock(&misc_mtx);
+	return seq_list_start(&misc_list, *pos);
+}
+
+static void *misc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	return seq_list_next(v, &misc_list, pos);
+}
+
+static void misc_seq_stop(struct seq_file *seq, void *v)
+{
+	mutex_unlock(&misc_mtx);
+}
+
+static int misc_seq_show(struct seq_file *seq, void *v)
+{
+	const struct miscdevice *p = list_entry(v, struct miscdevice, list);
+
+	seq_printf(seq, "%3i %s\n", p->minor, p->name ? p->name : "");
+	return 0;
+}
+
+
+static const struct seq_operations misc_seq_ops = {
+	.start = misc_seq_start,
+	.next  = misc_seq_next,
+	.stop  = misc_seq_stop,
+	.show  = misc_seq_show,
+};
+#endif
+
+static int misc_open(struct inode *inode, struct file *file)
+{
+	int minor = iminor(inode);
+	struct miscdevice *c = NULL, *iter;
+	int err = -ENODEV;
+	const struct file_operations *new_fops = NULL;
+
+	mutex_lock(&misc_mtx);
+
+	list_for_each_entry(iter, &misc_list, list) {
+		if (iter->minor != minor)
+			continue;
+		c = iter;
+		new_fops = fops_get(iter->fops);
+		break;
+	}
+
+	/* Only request module for fixed minor code */
+	if (!new_fops && minor < MISC_DYNAMIC_MINOR) {
+		mutex_unlock(&misc_mtx);
+		request_module("char-major-%d-%d", MISC_MAJOR, minor);
+		mutex_lock(&misc_mtx);
+
+		list_for_each_entry(iter, &misc_list, list) {
+			if (iter->minor != minor)
+				continue;
+			c = iter;
+			new_fops = fops_get(iter->fops);
+			break;
+		}
+	}
+
+	if (!new_fops)
+		goto fail;
+
+	/*
+	 * Place the miscdevice in the file's
+	 * private_data so it can be used by the
+	 * file operations, including f_op->open below
+	 */
+	file->private_data = c;
+
+	err = 0;
+	replace_fops(file, new_fops);
+	if (file->f_op->open)
+		err = file->f_op->open(inode, file);
+fail:
+	mutex_unlock(&misc_mtx);
+	return err;
+}
+
+static char *misc_devnode(const struct device *dev, umode_t *mode)
+{
+	const struct miscdevice *c = dev_get_drvdata(dev);
+
+	if (mode && c->mode)
+		*mode = c->mode;
+	if (c->nodename)
+		return kstrdup(c->nodename, GFP_KERNEL);
+	return NULL;
+}
+
+static const struct class misc_class = {
+	.name		= "misc",
+	.devnode	= misc_devnode,
+};
+
+static const struct file_operations misc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= misc_open,
+	.llseek		= noop_llseek,
+};
+
+/**
+ *	misc_register	-	register a miscellaneous device
+ *	@misc: device structure
+ *
+ *	Register a miscellaneous device with the kernel. If the minor
+ *	number is set to %MISC_DYNAMIC_MINOR a minor number is assigned
+ *	and placed in the minor field of the structure. For other cases
+ *	the minor number requested is used.
+ *
+ *	The structure passed is linked into the kernel and may not be
+ *	destroyed until it has been unregistered. By default, an open()
+ *	syscall to the device sets file->private_data to point to the
+ *	structure. Drivers don't need open in fops for this.
+ *
+ *	A zero is returned on success and a negative errno code for
+ *	failure.
+ */
+
+int misc_register(struct miscdevice *misc)
+{
+	dev_t dev;
+	int err = 0;
+	bool is_dynamic = (misc->minor == MISC_DYNAMIC_MINOR);
+
+	if (misc->minor > MISC_DYNAMIC_MINOR) {
+		pr_err("Invalid fixed minor %d for miscdevice '%s'\n",
+		       misc->minor, misc->name);
+		return -EINVAL;
+	}
+
+	INIT_LIST_HEAD(&misc->list);
+
+	mutex_lock(&misc_mtx);
+
+	if (is_dynamic) {
+		int i = misc_minor_alloc(misc->minor);
+
+		if (i < 0) {
+			err = -EBUSY;
+			goto out;
+		}
+		misc->minor = i;
+	} else {
+		struct miscdevice *c;
+		int i;
+
+		list_for_each_entry(c, &misc_list, list) {
+			if (c->minor == misc->minor) {
+				err = -EBUSY;
+				goto out;
+			}
+		}
+
+		i = misc_minor_alloc(misc->minor);
+		if (i < 0) {
+			err = -EBUSY;
+			goto out;
+		}
+	}
+
+	dev = MKDEV(MISC_MAJOR, misc->minor);
+
+	misc->this_device =
+		device_create_with_groups(&misc_class, misc->parent, dev,
+					  misc, misc->groups, "%s", misc->name);
+	if (IS_ERR(misc->this_device)) {
+		misc_minor_free(misc->minor);
+		if (is_dynamic) {
+			misc->minor = MISC_DYNAMIC_MINOR;
+		}
+		err = PTR_ERR(misc->this_device);
+		goto out;
+	}
+
+	/*
+	 * Add it to the front, so that later devices can "override"
+	 * earlier defaults
+	 */
+	list_add(&misc->list, &misc_list);
+ out:
+	mutex_unlock(&misc_mtx);
+	return err;
+}
+EXPORT_SYMBOL(misc_register);
+
+/**
+ *	misc_deregister - unregister a miscellaneous device
+ *	@misc: device to unregister
+ *
+ *	Unregister a miscellaneous device that was previously
+ *	successfully registered with misc_register().
+ */
+
+void misc_deregister(struct miscdevice *misc)
+{
+	mutex_lock(&misc_mtx);
+	list_del_init(&misc->list);
+	device_destroy(&misc_class, MKDEV(MISC_MAJOR, misc->minor));
+	misc_minor_free(misc->minor);
+	if (misc->minor > MISC_DYNAMIC_MINOR)
+		misc->minor = MISC_DYNAMIC_MINOR;
+	mutex_unlock(&misc_mtx);
+}
+EXPORT_SYMBOL(misc_deregister);
+
+static int __init misc_init(void)
+{
+	int err;
+	struct proc_dir_entry *misc_proc_file;
+
+	misc_proc_file = proc_create_seq("misc", 0, NULL, &misc_seq_ops);
+	err = class_register(&misc_class);
+	if (err)
+		goto fail_remove;
+
+	err = __register_chrdev(MISC_MAJOR, 0, MINORMASK + 1, "misc", &misc_fops);
+	if (err < 0)
+		goto fail_printk;
+	return 0;
+
+fail_printk:
+	pr_err("unable to get major %d for misc devices\n", MISC_MAJOR);
+	class_unregister(&misc_class);
+fail_remove:
+	if (misc_proc_file)
+		remove_proc_entry("misc", NULL);
+	return err;
+}
+subsys_initcall(misc_init);