arch: remove tile port

The Tile architecture port was added by Chris Metcalf in 2010, and
maintained until early 2018 when he orphaned it due to his departure
from Mellanox, and nobody else stepped up to maintain it. The product
line is still around in the form of the BlueField SoC, but no longer
uses the Tile architecture.

There are also still products for sale with Tile-GX SoCs, notably the
Mikrotik CCR router family. The products all use old (linux-3.3) kernels
with lots of patches and won't be upgraded by their manufacturers. There
have been efforts to port both OpenWRT and Debian to these, but both
projects have stalled and are very unlikely to be continued in the future.

Given that we are reasonably sure that nobody is still using the port
with an upstream kernel any more, it seems better to remove it now while
the port is in a good shape than to let it bitrot for a few years first.

Cc: Chris Metcalf <chris.d.metcalf@gmail.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: http://www.mellanox.com/page/npu_multicore_overview
Link: https://jenkins.debian.net/view/rebootstrap/job/rebootstrap_tilegx_gcc7/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 52 deletions

diff --git a/arch/tile/include/asm/timex.h b/arch/tile/include/asm/timex.h
deleted file mode 100644
index dc987d53e2a9..000000000000
--- a/arch/tile/include/asm/timex.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- *   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, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- */
-
-#ifndef _ASM_TILE_TIMEX_H
-#define _ASM_TILE_TIMEX_H
-
-/*
- * This rate should be a multiple of the possible HZ values (100, 250, 1000)
- * and a fraction of the possible hardware timer frequencies.  Our timer
- * frequency is highly tunable but also quite precise, so for the primary use
- * of this value (setting ACT_HZ from HZ) we just pick a value that causes
- * ACT_HZ to be set to HZ.  We make the value somewhat large just to be
- * more robust in case someone tries out a new value of HZ.
- */
-#define CLOCK_TICK_RATE	1000000
-
-typedef unsigned long long cycles_t;
-
-#if CHIP_HAS_SPLIT_CYCLE()
-cycles_t get_cycles(void);
-#define get_cycles_low() __insn_mfspr(SPR_CYCLE_LOW)
-#else
-static inline cycles_t get_cycles(void)
-{
-	return __insn_mfspr(SPR_CYCLE);
-}
-#define get_cycles_low() __insn_mfspr(SPR_CYCLE)   /* just get all 64 bits */
-#endif
-
-cycles_t get_clock_rate(void);
-
-/* Convert nanoseconds to core clock cycles. */
-cycles_t ns2cycles(unsigned long nsecs);
-
-/* Called at cpu initialization to set some low-level constants. */
-void setup_clock(void);
-
-/* Called at cpu initialization to start the tile-timer clock device. */
-void setup_tile_timer(void);
-
-#endif /* _ASM_TILE_TIMEX_H */