arch: remove blackfin port

The Analog Devices Blackfin port was added in 2007 and was rather
active for a while, but all work on it has come to a standstill
over time, as Analog have changed their product line-up.

Aaron Wu confirmed that the architecture port is no longer relevant,
and multiple people suggested removing blackfin independently because
of some of its oddities like a non-working SMP port, and the amount of
duplication between the chip variants, which cause extra work when
doing cross-architecture changes.

Link: https://docs.blackfin.uclinux.org/
Acked-by: Aaron Wu <Aaron.Wu@analog.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 46 deletions

diff --git a/arch/blackfin/include/asm/time.h b/arch/blackfin/include/asm/time.h
deleted file mode 100644
index 9ca7db844d10..000000000000
--- a/arch/blackfin/include/asm/time.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * asm-blackfin/time.h:
- *
- * Copyright 2004-2008 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#ifndef _ASM_BLACKFIN_TIME_H
-#define _ASM_BLACKFIN_TIME_H
-
-/*
- * The way that the Blackfin core timer works is:
- *  - CCLK is divided by a programmable 8-bit pre-scaler (TSCALE)
- *  - Every time TSCALE ticks, a 32bit is counted down (TCOUNT)
- *
- * If you take the fastest clock (1ns, or 1GHz to make the math work easier)
- *    10ms is 10,000,000 clock ticks, which fits easy into a 32-bit counter
- *    (32 bit counter is 4,294,967,296ns or 4.2 seconds) so, we don't need
- *    to use TSCALE, and program it to zero (which is pass CCLK through).
- *    If you feel like using it, try to keep HZ * TIMESCALE to some
- *    value that divides easy (like power of 2).
- */
-
-#ifndef CONFIG_CPU_FREQ
-# define TIME_SCALE 1
-#else
-/*
- * Blackfin CPU frequency scaling supports max Core Clock 1, 1/2 and 1/4 .
- * Whenever we change the Core Clock frequency changes we immediately
- * adjust the Core Timer Presale Register. This way we don't lose time.
- */
-#define TIME_SCALE 4
-
-# ifdef CONFIG_CYCLES_CLOCKSOURCE
-extern unsigned long long __bfin_cycles_off;
-extern unsigned int __bfin_cycles_mod;
-# endif
-#endif
-
-#if defined(CONFIG_TICKSOURCE_CORETMR)
-extern void bfin_coretmr_init(void);
-extern void bfin_coretmr_clockevent_init(void);
-#endif
-
-#endif