sh: Remove superhyway bus support

The superhyway bus driver was only referenced on SH4-202, which is now gone,
so remove it all as well.

I could find no trace of anything ever calling superhyway_register_driver(),
not in the git history but also not on the web, so I assume this has never
served any purpose on mainline kernels.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/20230914155523.3839811-3-arnd@kernel.org
Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>

4 files changed, 0 insertions, 297 deletions

diff --git a/drivers/sh/Makefile b/drivers/sh/Makefile
index c53262835e85..0aa152b1587a 100644
--- a/drivers/sh/Makefile
+++ b/drivers/sh/Makefile
@@ -7,6 +7,5 @@ ifneq ($(CONFIG_COMMON_CLK),y)
 obj-$(CONFIG_HAVE_CLK)			+= clk/
 endif
 obj-$(CONFIG_MAPLE)			+= maple/
-obj-$(CONFIG_SUPERHYWAY)		+= superhyway/
 
 obj-y					+= pm_runtime.o
diff --git a/drivers/sh/superhyway/Makefile b/drivers/sh/superhyway/Makefile
deleted file mode 100644
index 6dfa41f160af..000000000000
--- a/drivers/sh/superhyway/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the SuperHyway bus drivers.
-#
-
-obj-$(CONFIG_SUPERHYWAY)	+= superhyway.o
-obj-$(CONFIG_SYSFS)		+= superhyway-sysfs.o
-
diff --git a/drivers/sh/superhyway/superhyway-sysfs.c b/drivers/sh/superhyway/superhyway-sysfs.c
deleted file mode 100644
index 774f31b564f8..000000000000
--- a/drivers/sh/superhyway/superhyway-sysfs.c
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * drivers/sh/superhyway/superhyway-sysfs.c
- *
- * SuperHyway Bus sysfs interface
- *
- * Copyright (C) 2004, 2005  Paul Mundt <lethal@linux-sh.org>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/types.h>
-#include <linux/superhyway.h>
-
-#define superhyway_ro_attr(name, fmt, field)				\
-static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf)		\
-{									\
-	struct superhyway_device *s = to_superhyway_device(dev);	\
-	return sprintf(buf, fmt, s->field);				\
-}									\
-static DEVICE_ATTR_RO(name);
-
-/* VCR flags */
-superhyway_ro_attr(perr_flags, "0x%02x\n", vcr.perr_flags);
-superhyway_ro_attr(merr_flags, "0x%02x\n", vcr.merr_flags);
-superhyway_ro_attr(mod_vers, "0x%04x\n", vcr.mod_vers);
-superhyway_ro_attr(mod_id, "0x%04x\n", vcr.mod_id);
-superhyway_ro_attr(bot_mb, "0x%02x\n", vcr.bot_mb);
-superhyway_ro_attr(top_mb, "0x%02x\n", vcr.top_mb);
-
-/* Misc */
-superhyway_ro_attr(resource, "0x%08lx\n", resource[0].start);
-
-static struct attribute *superhyway_dev_attrs[] = {
-	&dev_attr_perr_flags.attr,
-	&dev_attr_merr_flags.attr,
-	&dev_attr_mod_vers.attr,
-	&dev_attr_mod_id.attr,
-	&dev_attr_bot_mb.attr,
-	&dev_attr_top_mb.attr,
-	&dev_attr_resource.attr,
-	NULL,
-};
-
-static const struct attribute_group superhyway_dev_group = {
-	.attrs = superhyway_dev_attrs,
-};
-
-const struct attribute_group *superhyway_dev_groups[] = {
-	&superhyway_dev_group,
-	NULL,
-};
diff --git a/drivers/sh/superhyway/superhyway.c b/drivers/sh/superhyway/superhyway.c
deleted file mode 100644
index 44324abe21da..000000000000
--- a/drivers/sh/superhyway/superhyway.c
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
- * drivers/sh/superhyway/superhyway.c
- *
- * SuperHyway Bus Driver
- *
- * Copyright (C) 2004, 2005  Paul Mundt <lethal@linux-sh.org>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/list.h>
-#include <linux/superhyway.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-
-static int superhyway_devices;
-
-static struct device superhyway_bus_device = {
-	.init_name = "superhyway",
-};
-
-static void superhyway_device_release(struct device *dev)
-{
-	struct superhyway_device *sdev = to_superhyway_device(dev);
-
-	kfree(sdev->resource);
-	kfree(sdev);
-}
-
-/**
- * superhyway_add_device - Add a SuperHyway module
- * @base: Physical address where module is mapped.
- * @sdev: SuperHyway device to add, or NULL to allocate a new one.
- * @bus: Bus where SuperHyway module resides.
- *
- * This is responsible for adding a new SuperHyway module. This sets up a new
- * struct superhyway_device for the module being added if @sdev == NULL.
- *
- * Devices are initially added in the order that they are scanned (from the
- * top-down of the memory map), and are assigned an ID based on the order that
- * they are added. Any manual addition of a module will thus get the ID after
- * the devices already discovered regardless of where it resides in memory.
- *
- * Further work can and should be done in superhyway_scan_bus(), to be sure
- * that any new modules are properly discovered and subsequently registered.
- */
-int superhyway_add_device(unsigned long base, struct superhyway_device *sdev,
-			  struct superhyway_bus *bus)
-{
-	struct superhyway_device *dev = sdev;
-
-	if (!dev) {
-		dev = kzalloc(sizeof(struct superhyway_device), GFP_KERNEL);
-		if (!dev)
-			return -ENOMEM;
-
-	}
-
-	dev->bus = bus;
-	superhyway_read_vcr(dev, base, &dev->vcr);
-
-	if (!dev->resource) {
-		dev->resource = kzalloc(sizeof(struct resource), GFP_KERNEL);
-		if (!dev->resource) {
-			kfree(dev);
-			return -ENOMEM;
-		}
-
-		dev->resource->name	= dev->name;
-		dev->resource->start	= base;
-		dev->resource->end	= dev->resource->start + 0x01000000;
-	}
-
-	dev->dev.parent		= &superhyway_bus_device;
-	dev->dev.bus		= &superhyway_bus_type;
-	dev->dev.release	= superhyway_device_release;
-	dev->id.id		= dev->vcr.mod_id;
-
-	sprintf(dev->name, "SuperHyway device %04x", dev->id.id);
-	dev_set_name(&dev->dev, "%02x", superhyway_devices);
-
-	superhyway_devices++;
-
-	return device_register(&dev->dev);
-}
-
-int superhyway_add_devices(struct superhyway_bus *bus,
-			   struct superhyway_device **devices,
-			   int nr_devices)
-{
-	int i, ret = 0;
-
-	for (i = 0; i < nr_devices; i++) {
-		struct superhyway_device *dev = devices[i];
-		ret |= superhyway_add_device(dev->resource[0].start, dev, bus);
-	}
-
-	return ret;
-}
-
-static int __init superhyway_init(void)
-{
-	struct superhyway_bus *bus;
-	int ret;
-
-	ret = device_register(&superhyway_bus_device);
-	if (unlikely(ret))
-		return ret;
-
-	for (bus = superhyway_channels; bus->ops; bus++)
-		ret |= superhyway_scan_bus(bus);
-
-	return ret;
-}
-postcore_initcall(superhyway_init);
-
-static const struct superhyway_device_id *
-superhyway_match_id(const struct superhyway_device_id *ids,
-		    struct superhyway_device *dev)
-{
-	while (ids->id) {
-		if (ids->id == dev->id.id)
-			return ids;
-
-		ids++;
-	}
-
-	return NULL;
-}
-
-static int superhyway_device_probe(struct device *dev)
-{
-	struct superhyway_device *shyway_dev = to_superhyway_device(dev);
-	struct superhyway_driver *shyway_drv = to_superhyway_driver(dev->driver);
-
-	if (shyway_drv && shyway_drv->probe) {
-		const struct superhyway_device_id *id;
-
-		id = superhyway_match_id(shyway_drv->id_table, shyway_dev);
-		if (id)
-			return shyway_drv->probe(shyway_dev, id);
-	}
-
-	return -ENODEV;
-}
-
-static void superhyway_device_remove(struct device *dev)
-{
-	struct superhyway_device *shyway_dev = to_superhyway_device(dev);
-	struct superhyway_driver *shyway_drv = to_superhyway_driver(dev->driver);
-
-	if (shyway_drv->remove)
-		shyway_drv->remove(shyway_dev);
-}
-
-/**
- * superhyway_register_driver - Register a new SuperHyway driver
- * @drv: SuperHyway driver to register.
- *
- * This registers the passed in @drv. Any devices matching the id table will
- * automatically be populated and handed off to the driver's specified probe
- * routine.
- */
-int superhyway_register_driver(struct superhyway_driver *drv)
-{
-	drv->drv.name	= drv->name;
-	drv->drv.bus	= &superhyway_bus_type;
-
-	return driver_register(&drv->drv);
-}
-
-/**
- * superhyway_unregister_driver - Unregister a SuperHyway driver
- * @drv: SuperHyway driver to unregister.
- *
- * This cleans up after superhyway_register_driver(), and should be invoked in
- * the exit path of any module drivers.
- */
-void superhyway_unregister_driver(struct superhyway_driver *drv)
-{
-	driver_unregister(&drv->drv);
-}
-
-static int superhyway_bus_match(struct device *dev, struct device_driver *drv)
-{
-	struct superhyway_device *shyway_dev = to_superhyway_device(dev);
-	struct superhyway_driver *shyway_drv = to_superhyway_driver(drv);
-	const struct superhyway_device_id *ids = shyway_drv->id_table;
-
-	if (!ids)
-		return -EINVAL;
-	if (superhyway_match_id(ids, shyway_dev))
-		return 1;
-
-	return -ENODEV;
-}
-
-struct bus_type superhyway_bus_type = {
-	.name		= "superhyway",
-	.match		= superhyway_bus_match,
-#ifdef CONFIG_SYSFS
-	.dev_groups	= superhyway_dev_groups,
-#endif
-	.probe		= superhyway_device_probe,
-	.remove		= superhyway_device_remove,
-};
-
-static int __init superhyway_bus_init(void)
-{
-	return bus_register(&superhyway_bus_type);
-}
-
-static void __exit superhyway_bus_exit(void)
-{
-	device_unregister(&superhyway_bus_device);
-	bus_unregister(&superhyway_bus_type);
-}
-
-core_initcall(superhyway_bus_init);
-module_exit(superhyway_bus_exit);
-
-EXPORT_SYMBOL(superhyway_bus_type);
-EXPORT_SYMBOL(superhyway_add_device);
-EXPORT_SYMBOL(superhyway_add_devices);
-EXPORT_SYMBOL(superhyway_register_driver);
-EXPORT_SYMBOL(superhyway_unregister_driver);
-
-MODULE_LICENSE("GPL");