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   - unicore32 and hexagon both have very outdated gcc releases, but the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
  ...

1 files changed, 0 insertions, 268 deletions

diff --git a/arch/cris/arch-v10/kernel/time.c b/arch/cris/arch-v10/kernel/time.c
deleted file mode 100644
index 3d78373db254..000000000000
--- a/arch/cris/arch-v10/kernel/time.c
+++ /dev/null
@@ -1,268 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/cris/arch-v10/kernel/time.c
- *
- *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
- *  Copyright (C) 1999-2002 Axis Communications AB
- *
- */
-
-#include <linux/timex.h>
-#include <linux/time.h>
-#include <linux/jiffies.h>
-#include <linux/interrupt.h>
-#include <linux/swap.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/mm.h>
-#include <asm/types.h>
-#include <asm/signal.h>
-#include <asm/io.h>
-#include <asm/delay.h>
-#include <asm/irq_regs.h>
-
-/* define this if you need to use print_timestamp */
-/* it will make jiffies at 96 hz instead of 100 hz though */
-#undef USE_CASCADE_TIMERS
-
-unsigned long get_ns_in_jiffie(void)
-{
-	unsigned char timer_count, t1;
-	unsigned short presc_count;
-	unsigned long ns;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	timer_count = *R_TIMER0_DATA;
-	presc_count = *R_TIM_PRESC_STATUS;
-	/* presc_count might be wrapped */
-	t1 = *R_TIMER0_DATA;
-
-	if (timer_count != t1){
-		/* it wrapped, read prescaler again...  */
-		presc_count = *R_TIM_PRESC_STATUS;
-		timer_count = t1;
-	}
-	local_irq_restore(flags);
-	if (presc_count >= PRESCALE_VALUE/2 ){
-		presc_count =  PRESCALE_VALUE - presc_count + PRESCALE_VALUE/2;
-	} else {
-		presc_count =  PRESCALE_VALUE - presc_count - PRESCALE_VALUE/2;
-	}
-
-	ns = ( (TIMER0_DIV - timer_count) * ((1000000000/HZ)/TIMER0_DIV )) +
-	     ( (presc_count) * (1000000000/PRESCALE_FREQ));
-	return ns;
-}
-
-static u32 cris_v10_gettimeoffset(void)
-{
-	u32 count;
-
-	/* The timer interrupt comes from Etrax timer 0. In order to get
-	 * better precision, we check the current value. It might have
-	 * underflowed already though.
-	 */
-	count = *R_TIMER0_DATA;
-
-	/* Convert timer value to nsec */
-	return (TIMER0_DIV - count) * (NSEC_PER_SEC/HZ)/TIMER0_DIV;
-}
-
-/* Excerpt from the Etrax100 HSDD about the built-in watchdog:
- *
- * 3.10.4 Watchdog timer
-
- * When the watchdog timer is started, it generates an NMI if the watchdog
- * isn't restarted or stopped within 0.1 s. If it still isn't restarted or
- * stopped after an additional 3.3 ms, the watchdog resets the chip.
- * The watchdog timer is stopped after reset. The watchdog timer is controlled
- * by the R_WATCHDOG register. The R_WATCHDOG register contains an enable bit
- * and a 3-bit key value. The effect of writing to the R_WATCHDOG register is
- * described in the table below:
- *
- *   Watchdog    Value written:
- *   state:      To enable:  To key:      Operation:
- *   --------    ----------  -------      ----------
- *   stopped         0         X          No effect.
- *   stopped         1       key_val      Start watchdog with key = key_val.
- *   started         0       ~key         Stop watchdog
- *   started         1       ~key         Restart watchdog with key = ~key.
- *   started         X       new_key_val  Change key to new_key_val.
- *
- * Note: '~' is the bitwise NOT operator.
- *
- */
-
-/* right now, starting the watchdog is the same as resetting it */
-#define start_watchdog reset_watchdog
-
-#ifdef CONFIG_ETRAX_WATCHDOG
-static int watchdog_key = 0;  /* arbitrary number */
-#endif
-
-/* number of pages to consider "out of memory". it is normal that the memory
- * is used though, so put this really low.
- */
-
-#define WATCHDOG_MIN_FREE_PAGES 8
-
-void reset_watchdog(void)
-{
-#if defined(CONFIG_ETRAX_WATCHDOG)
-	/* only keep watchdog happy as long as we have memory left! */
-	if(nr_free_pages() > WATCHDOG_MIN_FREE_PAGES) {
-		/* reset the watchdog with the inverse of the old key */
-		watchdog_key ^= 0x7; /* invert key, which is 3 bits */
-		*R_WATCHDOG = IO_FIELD(R_WATCHDOG, key, watchdog_key) |
-			IO_STATE(R_WATCHDOG, enable, start);
-	}
-#endif
-}
-
-/* stop the watchdog - we still need the correct key */
-
-void stop_watchdog(void)
-{
-#ifdef CONFIG_ETRAX_WATCHDOG
-	watchdog_key ^= 0x7; /* invert key, which is 3 bits */
-	*R_WATCHDOG = IO_FIELD(R_WATCHDOG, key, watchdog_key) |
-		IO_STATE(R_WATCHDOG, enable, stop);
-#endif
-}
-
-
-extern void cris_do_profile(struct pt_regs *regs);
-
-/*
- * timer_interrupt() needs to keep up the real-time clock,
- * as well as call the "xtime_update()" routine every clocktick
- */
-static inline irqreturn_t timer_interrupt(int irq, void *dev_id)
-{
-	struct pt_regs *regs = get_irq_regs();
-	/* acknowledge the timer irq */
-
-#ifdef USE_CASCADE_TIMERS
-	*R_TIMER_CTRL =
-		IO_FIELD( R_TIMER_CTRL, timerdiv1, 0) |
-		IO_FIELD( R_TIMER_CTRL, timerdiv0, 0) |
-		IO_STATE( R_TIMER_CTRL, i1, clr) |
-		IO_STATE( R_TIMER_CTRL, tm1, run) |
-		IO_STATE( R_TIMER_CTRL, clksel1, cascade0) |
-		IO_STATE( R_TIMER_CTRL, i0, clr) |
-		IO_STATE( R_TIMER_CTRL, tm0, run) |
-		IO_STATE( R_TIMER_CTRL, clksel0, c6250kHz);
-#else
-	*R_TIMER_CTRL = r_timer_ctrl_shadow | IO_STATE(R_TIMER_CTRL, i0, clr);
-#endif
-
-	/* reset watchdog otherwise it resets us! */
-	reset_watchdog();
-
-	/* Update statistics. */
-	update_process_times(user_mode(regs));
-
-	/* call the real timer interrupt handler */
-	xtime_update(1);
-
-        cris_do_profile(regs); /* Save profiling information */
-        return IRQ_HANDLED;
-}
-
-/* timer is IRQF_SHARED so drivers can add stuff to the timer irq chain */
-
-static struct irqaction irq2  = {
-	.handler = timer_interrupt,
-	.flags = IRQF_SHARED,
-	.name = "timer",
-};
-
-void __init time_init(void)
-{
-	arch_gettimeoffset = cris_v10_gettimeoffset;
-
-	/* probe for the RTC and read it if it exists
-	 * Before the RTC can be probed the loops_per_usec variable needs
-	 * to be initialized to make usleep work. A better value for
-	 * loops_per_usec is calculated by the kernel later once the
-	 * clock has started.
-	 */
-	loops_per_usec = 50;
-
-	/* Setup the etrax timers
-	 * Base frequency is 25000 hz, divider 250 -> 100 HZ
-	 * In normal mode, we use timer0, so timer1 is free. In cascade
-	 * mode (which we sometimes use for debugging) both timers are used.
-	 * Remember that linux/timex.h contains #defines that rely on the
-	 * timer settings below (hz and divide factor) !!!
-	 */
-
-#ifdef USE_CASCADE_TIMERS
-	*R_TIMER_CTRL =
-		IO_FIELD( R_TIMER_CTRL, timerdiv1, 0) |
-		IO_FIELD( R_TIMER_CTRL, timerdiv0, 0) |
-		IO_STATE( R_TIMER_CTRL, i1, nop) |
-		IO_STATE( R_TIMER_CTRL, tm1, stop_ld) |
-		IO_STATE( R_TIMER_CTRL, clksel1, cascade0) |
-		IO_STATE( R_TIMER_CTRL, i0, nop) |
-		IO_STATE( R_TIMER_CTRL, tm0, stop_ld) |
-		IO_STATE( R_TIMER_CTRL, clksel0, c6250kHz);
-
-	*R_TIMER_CTRL = r_timer_ctrl_shadow =
-		IO_FIELD( R_TIMER_CTRL, timerdiv1, 0) |
-		IO_FIELD( R_TIMER_CTRL, timerdiv0, 0) |
-		IO_STATE( R_TIMER_CTRL, i1, nop) |
-		IO_STATE( R_TIMER_CTRL, tm1, run) |
-		IO_STATE( R_TIMER_CTRL, clksel1, cascade0) |
-		IO_STATE( R_TIMER_CTRL, i0, nop) |
-		IO_STATE( R_TIMER_CTRL, tm0, run) |
-		IO_STATE( R_TIMER_CTRL, clksel0, c6250kHz);
-#else
-	*R_TIMER_CTRL =
-		IO_FIELD(R_TIMER_CTRL, timerdiv1, 192)      |
-		IO_FIELD(R_TIMER_CTRL, timerdiv0, TIMER0_DIV)      |
-		IO_STATE(R_TIMER_CTRL, i1,        nop)      |
-		IO_STATE(R_TIMER_CTRL, tm1,       stop_ld)  |
-		IO_STATE(R_TIMER_CTRL, clksel1,   c19k2Hz)  |
-		IO_STATE(R_TIMER_CTRL, i0,        nop)      |
-		IO_STATE(R_TIMER_CTRL, tm0,       stop_ld)  |
-		IO_STATE(R_TIMER_CTRL, clksel0,   flexible);
-
-	*R_TIMER_CTRL = r_timer_ctrl_shadow =
-		IO_FIELD(R_TIMER_CTRL, timerdiv1, 192)      |
-		IO_FIELD(R_TIMER_CTRL, timerdiv0, TIMER0_DIV)      |
-		IO_STATE(R_TIMER_CTRL, i1,        nop)      |
-		IO_STATE(R_TIMER_CTRL, tm1,       run)      |
-		IO_STATE(R_TIMER_CTRL, clksel1,   c19k2Hz)  |
-		IO_STATE(R_TIMER_CTRL, i0,        nop)      |
-		IO_STATE(R_TIMER_CTRL, tm0,       run)      |
-		IO_STATE(R_TIMER_CTRL, clksel0,   flexible);
-
-	*R_TIMER_PRESCALE = PRESCALE_VALUE;
-#endif
-
-	/* unmask the timer irq */
-	*R_IRQ_MASK0_SET = IO_STATE(R_IRQ_MASK0_SET, timer0, set);
-
-	/* now actually register the irq handler that calls timer_interrupt() */
-	setup_irq(2, &irq2); /* irq 2 is the timer0 irq in etrax */
-
-	/* enable watchdog if we should use one */
-#if defined(CONFIG_ETRAX_WATCHDOG)
-	printk("Enabling watchdog...\n");
-	start_watchdog();
-
-	/* If we use the hardware watchdog, we want to trap it as an NMI
-	   and dump registers before it resets us.  For this to happen, we
-	   must set the "m" NMI enable flag (which once set, is unset only
-	   when an NMI is taken).
-
-	   The same goes for the external NMI, but that doesn't have any
-	   driver or infrastructure support yet.  */
-	asm ("setf m");
-
-	*R_IRQ_MASK0_SET = IO_STATE(R_IRQ_MASK0_SET, watchdog_nmi, set);
-	*R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, nmi, set);
-#endif
-}