Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...

3 files changed, 1 insertions, 505 deletions

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 37460cd6cabb..de6847d7b4e3 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -815,23 +815,6 @@ config SPRD_WATCHDOG
 	  Say Y here to include watchdog timer supported
 	  by Spreadtrum system.
 
-# BLACKFIN Architecture
-
-config BFIN_WDT
-	tristate "Blackfin On-Chip Watchdog Timer"
-	depends on BLACKFIN
-	---help---
-	  If you say yes here you will get support for the Blackfin On-Chip
-	  Watchdog Timer. If you have one of these processors and wish to
-	  have watchdog support enabled, say Y, otherwise say N.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called bfin_wdt.
-
-# CRIS Architecture
-
-# FRV Architecture
-
 # X86 (i386 + ia64 + x86_64) Architecture
 
 config ACQUIRE_WDT
@@ -1431,8 +1414,6 @@ config NIC7018_WDT
 	  To compile this driver as a module, choose M here: the module will be
 	  called nic7018_wdt.
 
-# M32R Architecture
-
 # M68K Architecture
 
 config M54xx_WATCHDOG
@@ -1605,7 +1586,7 @@ config BCM7038_WDT
 config IMGPDC_WDT
 	tristate "Imagination Technologies PDC Watchdog Timer"
 	depends on HAS_IOMEM
-	depends on METAG || MIPS || COMPILE_TEST
+	depends on MIPS || COMPILE_TEST
 	select WATCHDOG_CORE
 	help
 	  Driver for Imagination Technologies PowerDown Controller
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 0474d38aa854..e4dd91f5585a 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -91,13 +91,6 @@ obj-$(CONFIG_UNIPHIER_WATCHDOG) += uniphier_wdt.o
 obj-$(CONFIG_RTD119X_WATCHDOG) += rtd119x_wdt.o
 obj-$(CONFIG_SPRD_WATCHDOG) += sprd_wdt.o
 
-# BLACKFIN Architecture
-obj-$(CONFIG_BFIN_WDT) += bfin_wdt.o
-
-# CRIS Architecture
-
-# FRV Architecture
-
 # X86 (i386 + ia64 + x86_64) Architecture
 obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
 obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
@@ -146,8 +139,6 @@ obj-$(CONFIG_INTEL_MEI_WDT) += mei_wdt.o
 obj-$(CONFIG_NI903X_WDT) += ni903x_wdt.o
 obj-$(CONFIG_NIC7018_WDT) += nic7018_wdt.o
 
-# M32R Architecture
-
 # M68K Architecture
 obj-$(CONFIG_M54xx_WATCHDOG) += m54xx_wdt.o
 
diff --git a/drivers/watchdog/bfin_wdt.c b/drivers/watchdog/bfin_wdt.c
deleted file mode 100644
index aa4d2e8a8ef9..000000000000
--- a/drivers/watchdog/bfin_wdt.c
+++ /dev/null
@@ -1,476 +0,0 @@
-/*
- * Blackfin On-Chip Watchdog Driver
- *
- * Originally based on softdog.c
- * Copyright 2006-2010 Analog Devices Inc.
- * Copyright 2006-2007 Michele d'Amico
- * Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/uaccess.h>
-#include <asm/blackfin.h>
-#include <asm/bfin_watchdog.h>
-
-#define stamp(fmt, args...) \
-	pr_debug("%s:%i: " fmt "\n", __func__, __LINE__, ## args)
-#define stampit() stamp("here i am")
-
-#define WATCHDOG_NAME "bfin-wdt"
-
-/* The BF561 has two watchdogs (one per core), but since Linux
- * only runs on core A, we'll just work with that one.
- */
-#ifdef BF561_FAMILY
-# define bfin_read_WDOG_CTL()    bfin_read_WDOGA_CTL()
-# define bfin_read_WDOG_CNT()    bfin_read_WDOGA_CNT()
-# define bfin_read_WDOG_STAT()   bfin_read_WDOGA_STAT()
-# define bfin_write_WDOG_CTL(x)  bfin_write_WDOGA_CTL(x)
-# define bfin_write_WDOG_CNT(x)  bfin_write_WDOGA_CNT(x)
-# define bfin_write_WDOG_STAT(x) bfin_write_WDOGA_STAT(x)
-#endif
-
-/* some defaults */
-#define WATCHDOG_TIMEOUT 20
-
-static unsigned int timeout = WATCHDOG_TIMEOUT;
-static bool nowayout = WATCHDOG_NOWAYOUT;
-static const struct watchdog_info bfin_wdt_info;
-static unsigned long open_check;
-static char expect_close;
-static DEFINE_SPINLOCK(bfin_wdt_spinlock);
-
-/**
- *	bfin_wdt_keepalive - Keep the Userspace Watchdog Alive
- *
- *	The Userspace watchdog got a KeepAlive: schedule the next timeout.
- */
-static int bfin_wdt_keepalive(void)
-{
-	stampit();
-	bfin_write_WDOG_STAT(0);
-	return 0;
-}
-
-/**
- *	bfin_wdt_stop - Stop the Watchdog
- *
- *	Stops the on-chip watchdog.
- */
-static int bfin_wdt_stop(void)
-{
-	stampit();
-	bfin_write_WDOG_CTL(WDEN_DISABLE);
-	return 0;
-}
-
-/**
- *	bfin_wdt_start - Start the Watchdog
- *
- *	Starts the on-chip watchdog.  Automatically loads WDOG_CNT
- *	into WDOG_STAT for us.
- */
-static int bfin_wdt_start(void)
-{
-	stampit();
-	bfin_write_WDOG_CTL(WDEN_ENABLE | ICTL_RESET);
-	return 0;
-}
-
-/**
- *	bfin_wdt_running - Check Watchdog status
- *
- *	See if the watchdog is running.
- */
-static int bfin_wdt_running(void)
-{
-	stampit();
-	return ((bfin_read_WDOG_CTL() & WDEN_MASK) != WDEN_DISABLE);
-}
-
-/**
- *	bfin_wdt_set_timeout - Set the Userspace Watchdog timeout
- *	@t: new timeout value (in seconds)
- *
- *	Translate the specified timeout in seconds into System Clock
- *	terms which is what the on-chip Watchdog requires.
- */
-static int bfin_wdt_set_timeout(unsigned long t)
-{
-	u32 cnt, max_t, sclk;
-	unsigned long flags;
-
-	sclk = get_sclk();
-	max_t = -1 / sclk;
-	cnt = t * sclk;
-	stamp("maxtimeout=%us newtimeout=%lus (cnt=%#x)", max_t, t, cnt);
-
-	if (t > max_t) {
-		pr_warn("timeout value is too large\n");
-		return -EINVAL;
-	}
-
-	spin_lock_irqsave(&bfin_wdt_spinlock, flags);
-	{
-		int run = bfin_wdt_running();
-		bfin_wdt_stop();
-		bfin_write_WDOG_CNT(cnt);
-		if (run)
-			bfin_wdt_start();
-	}
-	spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
-
-	timeout = t;
-
-	return 0;
-}
-
-/**
- *	bfin_wdt_open - Open the Device
- *	@inode: inode of device
- *	@file: file handle of device
- *
- *	Watchdog device is opened and started.
- */
-static int bfin_wdt_open(struct inode *inode, struct file *file)
-{
-	stampit();
-
-	if (test_and_set_bit(0, &open_check))
-		return -EBUSY;
-
-	if (nowayout)
-		__module_get(THIS_MODULE);
-
-	bfin_wdt_keepalive();
-	bfin_wdt_start();
-
-	return nonseekable_open(inode, file);
-}
-
-/**
- *	bfin_wdt_close - Close the Device
- *	@inode: inode of device
- *	@file: file handle of device
- *
- *	Watchdog device is closed and stopped.
- */
-static int bfin_wdt_release(struct inode *inode, struct file *file)
-{
-	stampit();
-
-	if (expect_close == 42)
-		bfin_wdt_stop();
-	else {
-		pr_crit("Unexpected close, not stopping watchdog!\n");
-		bfin_wdt_keepalive();
-	}
-	expect_close = 0;
-	clear_bit(0, &open_check);
-	return 0;
-}
-
-/**
- *	bfin_wdt_write - Write to Device
- *	@file: file handle of device
- *	@buf: buffer to write
- *	@count: length of buffer
- *	@ppos: offset
- *
- *	Pings the watchdog on write.
- */
-static ssize_t bfin_wdt_write(struct file *file, const char __user *data,
-						size_t len, loff_t *ppos)
-{
-	stampit();
-
-	if (len) {
-		if (!nowayout) {
-			size_t i;
-
-			/* In case it was set long ago */
-			expect_close = 0;
-
-			for (i = 0; i != len; i++) {
-				char c;
-				if (get_user(c, data + i))
-					return -EFAULT;
-				if (c == 'V')
-					expect_close = 42;
-			}
-		}
-		bfin_wdt_keepalive();
-	}
-
-	return len;
-}
-
-/**
- *	bfin_wdt_ioctl - Query Device
- *	@file: file handle of device
- *	@cmd: watchdog command
- *	@arg: argument
- *
- *	Query basic information from the device or ping it, as outlined by the
- *	watchdog API.
- */
-static long bfin_wdt_ioctl(struct file *file,
-				unsigned int cmd, unsigned long arg)
-{
-	void __user *argp = (void __user *)arg;
-	int __user *p = argp;
-
-	stampit();
-
-	switch (cmd) {
-	case WDIOC_GETSUPPORT:
-		if (copy_to_user(argp, &bfin_wdt_info, sizeof(bfin_wdt_info)))
-			return -EFAULT;
-		else
-			return 0;
-	case WDIOC_GETSTATUS:
-	case WDIOC_GETBOOTSTATUS:
-		return put_user(!!(_bfin_swrst & SWRST_RESET_WDOG), p);
-	case WDIOC_SETOPTIONS: {
-		unsigned long flags;
-		int options, ret = -EINVAL;
-
-		if (get_user(options, p))
-			return -EFAULT;
-
-		spin_lock_irqsave(&bfin_wdt_spinlock, flags);
-		if (options & WDIOS_DISABLECARD) {
-			bfin_wdt_stop();
-			ret = 0;
-		}
-		if (options & WDIOS_ENABLECARD) {
-			bfin_wdt_start();
-			ret = 0;
-		}
-		spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
-		return ret;
-	}
-	case WDIOC_KEEPALIVE:
-		bfin_wdt_keepalive();
-		return 0;
-	case WDIOC_SETTIMEOUT: {
-		int new_timeout;
-
-		if (get_user(new_timeout, p))
-			return -EFAULT;
-		if (bfin_wdt_set_timeout(new_timeout))
-			return -EINVAL;
-	}
-	/* Fall */
-	case WDIOC_GETTIMEOUT:
-		return put_user(timeout, p);
-	default:
-		return -ENOTTY;
-	}
-}
-
-#ifdef CONFIG_PM
-static int state_before_suspend;
-
-/**
- *	bfin_wdt_suspend - suspend the watchdog
- *	@pdev: device being suspended
- *	@state: requested suspend state
- *
- *	Remember if the watchdog was running and stop it.
- *	TODO: is this even right?  Doesn't seem to be any
- *	      standard in the watchdog world ...
- */
-static int bfin_wdt_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	stampit();
-
-	state_before_suspend = bfin_wdt_running();
-	bfin_wdt_stop();
-
-	return 0;
-}
-
-/**
- *	bfin_wdt_resume - resume the watchdog
- *	@pdev: device being resumed
- *
- *	If the watchdog was running, turn it back on.
- */
-static int bfin_wdt_resume(struct platform_device *pdev)
-{
-	stampit();
-
-	if (state_before_suspend) {
-		bfin_wdt_set_timeout(timeout);
-		bfin_wdt_start();
-	}
-
-	return 0;
-}
-#else
-# define bfin_wdt_suspend NULL
-# define bfin_wdt_resume NULL
-#endif
-
-static const struct file_operations bfin_wdt_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.write		= bfin_wdt_write,
-	.unlocked_ioctl	= bfin_wdt_ioctl,
-	.open		= bfin_wdt_open,
-	.release	= bfin_wdt_release,
-};
-
-static struct miscdevice bfin_wdt_miscdev = {
-	.minor    = WATCHDOG_MINOR,
-	.name     = "watchdog",
-	.fops     = &bfin_wdt_fops,
-};
-
-static const struct watchdog_info bfin_wdt_info = {
-	.identity = "Blackfin Watchdog",
-	.options  = WDIOF_SETTIMEOUT |
-		    WDIOF_KEEPALIVEPING |
-		    WDIOF_MAGICCLOSE,
-};
-
-/**
- *	bfin_wdt_probe - Initialize module
- *
- *	Registers the misc device.  Actual device
- *	initialization is handled by bfin_wdt_open().
- */
-static int bfin_wdt_probe(struct platform_device *pdev)
-{
-	int ret;
-
-	ret = misc_register(&bfin_wdt_miscdev);
-	if (ret) {
-		pr_err("cannot register miscdev on minor=%d (err=%d)\n",
-		       WATCHDOG_MINOR, ret);
-		return ret;
-	}
-
-	pr_info("initialized: timeout=%d sec (nowayout=%d)\n",
-		timeout, nowayout);
-
-	return 0;
-}
-
-/**
- *	bfin_wdt_remove - Initialize module
- *
- *	Unregisters the misc device.  Actual device
- *	deinitialization is handled by bfin_wdt_close().
- */
-static int bfin_wdt_remove(struct platform_device *pdev)
-{
-	misc_deregister(&bfin_wdt_miscdev);
-	return 0;
-}
-
-/**
- *	bfin_wdt_shutdown - Soft Shutdown Handler
- *
- *	Handles the soft shutdown event.
- */
-static void bfin_wdt_shutdown(struct platform_device *pdev)
-{
-	stampit();
-
-	bfin_wdt_stop();
-}
-
-static struct platform_device *bfin_wdt_device;
-
-static struct platform_driver bfin_wdt_driver = {
-	.probe     = bfin_wdt_probe,
-	.remove    = bfin_wdt_remove,
-	.shutdown  = bfin_wdt_shutdown,
-	.suspend   = bfin_wdt_suspend,
-	.resume    = bfin_wdt_resume,
-	.driver    = {
-		.name  = WATCHDOG_NAME,
-	},
-};
-
-/**
- *	bfin_wdt_init - Initialize module
- *
- *	Checks the module params and registers the platform device & driver.
- *	Real work is in the platform probe function.
- */
-static int __init bfin_wdt_init(void)
-{
-	int ret;
-
-	stampit();
-
-	/* Check that the timeout value is within range */
-	if (bfin_wdt_set_timeout(timeout))
-		return -EINVAL;
-
-	/* Since this is an on-chip device and needs no board-specific
-	 * resources, we'll handle all the platform device stuff here.
-	 */
-	ret = platform_driver_register(&bfin_wdt_driver);
-	if (ret) {
-		pr_err("unable to register driver\n");
-		return ret;
-	}
-
-	bfin_wdt_device = platform_device_register_simple(WATCHDOG_NAME,
-								-1, NULL, 0);
-	if (IS_ERR(bfin_wdt_device)) {
-		pr_err("unable to register device\n");
-		platform_driver_unregister(&bfin_wdt_driver);
-		return PTR_ERR(bfin_wdt_device);
-	}
-
-	return 0;
-}
-
-/**
- *	bfin_wdt_exit - Deinitialize module
- *
- *	Back out the platform device & driver steps.  Real work is in the
- *	platform remove function.
- */
-static void __exit bfin_wdt_exit(void)
-{
-	platform_device_unregister(bfin_wdt_device);
-	platform_driver_unregister(&bfin_wdt_driver);
-}
-
-module_init(bfin_wdt_init);
-module_exit(bfin_wdt_exit);
-
-MODULE_AUTHOR("Michele d'Amico, Mike Frysinger <vapier@gentoo.org>");
-MODULE_DESCRIPTION("Blackfin Watchdog Device Driver");
-MODULE_LICENSE("GPL");
-
-module_param(timeout, uint, 0);
-MODULE_PARM_DESC(timeout,
-	"Watchdog timeout in seconds. (1<=timeout<=((2^32)/SCLK), default="
-		__MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-
-module_param(nowayout, bool, 0);
-MODULE_PARM_DESC(nowayout,
-	"Watchdog cannot be stopped once started (default="
-		__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");