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   - unicore32 and hexagon both have very outdated gcc releases, but the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, 151 deletions

diff --git a/arch/mn10300/unit-asb2364/include/unit/serial.h b/arch/mn10300/unit-asb2364/include/unit/serial.h
deleted file mode 100644
index 92f224a97efc..000000000000
--- a/arch/mn10300/unit-asb2364/include/unit/serial.h
+++ /dev/null
@@ -1,151 +0,0 @@
-/* Unit-specific 8250 serial ports
- *
- * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _ASM_UNIT_SERIAL_H
-#define _ASM_UNIT_SERIAL_H
-
-#include <asm/cpu-regs.h>
-#include <proc/irq.h>
-#include <unit/fpga-regs.h>
-#include <linux/serial_reg.h>
-
-#define SERIAL_PORT0_BASE_ADDRESS	0xA8200000
-
-#define SERIAL_IRQ	XIRQ1	/* single serial (TL16C550C)	(Lo) */
-
-/*
- * The ASB2364 has an 12.288 MHz clock
- * for your UART.
- *
- * It'd be nice if someone built a serial card with a 24.576 MHz
- * clock, since the 16550A is capable of handling a top speed of 1.5
- * megabits/second; but this requires the faster clock.
- */
-#define BASE_BAUD (12288000 / 16)
-
-/*
- * dispose of the /dev/ttyS0 and /dev/ttyS1 serial ports
- */
-#ifndef CONFIG_GDBSTUB_ON_TTYSx
-
-#define SERIAL_PORT_DFNS						\
-	{								\
-		.baud_base	= BASE_BAUD,				\
-		.irq		= SERIAL_IRQ,				\
-		.flags		= STD_COM_FLAGS,			\
-		.iomem_base	= (u8 *) SERIAL_PORT0_BASE_ADDRESS,	\
-		.iomem_reg_shift = 1,					\
-		.io_type	= SERIAL_IO_MEM,			\
-	},
-
-#ifndef __ASSEMBLY__
-
-static inline void __debug_to_serial(const char *p, int n)
-{
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#else /* CONFIG_GDBSTUB_ON_TTYSx */
-
-#define SERIAL_PORT_DFNS /* stolen by gdb-stub */
-
-#if defined(CONFIG_GDBSTUB_ON_TTYS0)
-#define GDBPORT_SERIAL_RX	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_RX  * 2, u8)
-#define GDBPORT_SERIAL_TX	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_TX  * 2, u8)
-#define GDBPORT_SERIAL_DLL	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLL * 2, u8)
-#define GDBPORT_SERIAL_DLM	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLM * 2, u8)
-#define GDBPORT_SERIAL_IER	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IER * 2, u8)
-#define GDBPORT_SERIAL_IIR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IIR * 2, u8)
-#define GDBPORT_SERIAL_FCR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_FCR * 2, u8)
-#define GDBPORT_SERIAL_LCR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LCR * 2, u8)
-#define GDBPORT_SERIAL_MCR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MCR * 2, u8)
-#define GDBPORT_SERIAL_LSR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LSR * 2, u8)
-#define GDBPORT_SERIAL_MSR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MSR * 2, u8)
-#define GDBPORT_SERIAL_SCR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_SCR * 2, u8)
-#define GDBPORT_SERIAL_IRQ	SERIAL_IRQ
-
-#elif defined(CONFIG_GDBSTUB_ON_TTYS1)
-#error The ASB2364 does not have a /dev/ttyS1
-#endif
-
-#ifndef __ASSEMBLY__
-
-static inline void __debug_to_serial(const char *p, int n)
-{
-	char ch;
-
-#define LSR_WAIT_FOR(STATE)	\
-	do {} while (!(GDBPORT_SERIAL_LSR & UART_LSR_##STATE))
-#define FLOWCTL_QUERY(LINE)	\
-	({ GDBPORT_SERIAL_MSR & UART_MSR_##LINE; })
-#define FLOWCTL_WAIT_FOR(LINE)	\
-	do {} while (!(GDBPORT_SERIAL_MSR & UART_MSR_##LINE))
-#define FLOWCTL_CLEAR(LINE)	\
-	do { GDBPORT_SERIAL_MCR &= ~UART_MCR_##LINE; } while (0)
-#define FLOWCTL_SET(LINE)	\
-	do { GDBPORT_SERIAL_MCR |= UART_MCR_##LINE; } while (0)
-
-	FLOWCTL_SET(DTR);
-
-	for (; n > 0; n--) {
-		LSR_WAIT_FOR(THRE);
-		FLOWCTL_WAIT_FOR(CTS);
-
-		ch = *p++;
-		if (ch == 0x0a) {
-			GDBPORT_SERIAL_TX = 0x0d;
-			LSR_WAIT_FOR(THRE);
-			FLOWCTL_WAIT_FOR(CTS);
-		}
-		GDBPORT_SERIAL_TX = ch;
-	}
-
-	FLOWCTL_CLEAR(DTR);
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif /* CONFIG_GDBSTUB_ON_TTYSx */
-
-#define SERIAL_INITIALIZE					\
-do {								\
-	/* release reset */					\
-	ASB2364_FPGA_REG_RESET_UART = 0x0001;			\
-	SyncExBus();						\
-} while (0)
-
-#define SERIAL_CHECK_INTERRUPT					\
-do {								\
-	if ((ASB2364_FPGA_REG_IRQ_UART & 0x0001) == 0x0001) {	\
-		return IRQ_NONE;				\
-	}							\
-} while (0)
-
-#define SERIAL_CLEAR_INTERRUPT					\
-do {								\
-	ASB2364_FPGA_REG_IRQ_UART = 0x0001;			\
-	SyncExBus();						\
-} while (0)
-
-#define SERIAL_SET_INT_MASK					\
-do {								\
-	ASB2364_FPGA_REG_MASK_UART = 0x0001;			\
-	SyncExBus();						\
-} while (0)
-
-#define SERIAL_CLEAR_INT_MASK					\
-do {								\
-	ASB2364_FPGA_REG_MASK_UART = 0x0000;			\
-	SyncExBus();						\
-} while (0)
-
-#endif /* _ASM_UNIT_SERIAL_H */