[PATCH] mips: remove VR4181 support

There seem to be no more users or interest in the NEC Osprey evaluation
system for the NEC VR4181 SOC which is an old part anyway, so remove the
code.  More information on the Osprey can be found at
http://www.linux-mips.org/wiki/Osprey.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 0 insertions, 145 deletions

diff --git a/arch/mips/vr4181/common/time.c b/arch/mips/vr4181/common/time.c
deleted file mode 100644
index 17814076b6f4..000000000000
--- a/arch/mips/vr4181/common/time.c
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * rtc and time ops for vr4181.	 Part of code is drived from
- * linux-vr, originally written	 by Bradley D. LaRonde & Michael Klar.
- *
- * 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.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/spinlock.h>
-#include <linux/param.h>			/* for HZ */
-#include <linux/time.h>
-#include <linux/interrupt.h>
-
-#include <asm/system.h>
-#include <asm/time.h>
-
-#include <asm/vr4181/vr4181.h>
-
-#define COUNTS_PER_JIFFY ((32768 + HZ/2) / HZ)
-
-/*
- * RTC ops
- */
-
-DEFINE_SPINLOCK(rtc_lock);
-
-/* per VR41xx docs, bad data can be read if between 2 counts */
-static inline unsigned short
-read_time_reg(volatile unsigned short *reg)
-{
-	unsigned short value;
-	do {
-		value = *reg;
-		barrier();
-	} while (value != *reg);
-	return value;
-}
-
-static unsigned long
-vr4181_rtc_get_time(void)
-{
-	unsigned short regh, regm, regl;
-
-	// why this crazy order, you ask?  to guarantee that neither m
-	// nor l wrap before all 3 read
-	do {
-		regm = read_time_reg(VR4181_ETIMEMREG);
-		barrier();
-		regh = read_time_reg(VR4181_ETIMEHREG);
-		barrier();
-		regl = read_time_reg(VR4181_ETIMELREG);
-	} while (regm != read_time_reg(VR4181_ETIMEMREG));
-	return ((regh << 17) | (regm << 1) | (regl >> 15));
-}
-
-static int
-vr4181_rtc_set_time(unsigned long timeval)
-{
-	unsigned short intreg;
-	unsigned long flags;
-
-	spin_lock_irqsave(&rtc_lock, flags);
-	intreg = *VR4181_RTCINTREG & 0x05;
-	barrier();
-	*VR4181_ETIMELREG = timeval << 15;
-	*VR4181_ETIMEMREG = timeval >> 1;
-	*VR4181_ETIMEHREG = timeval >> 17;
-	barrier();
-	// assume that any ints that just triggered are invalid, since the
-	// time value is written non-atomically in 3 separate regs
-	*VR4181_RTCINTREG = 0x05 ^ intreg;
-	spin_unlock_irqrestore(&rtc_lock, flags);
-
-	return 0;
-}
-
-
-/*
- * timer interrupt routine (wrapper)
- *
- * we need our own interrupt routine because we need to clear
- * RTC1 interrupt.
- */
-static void
-vr4181_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
-	/* Clear the interrupt. */
-	*VR4181_RTCINTREG = 0x2;
-
-	/* call the generic one */
-	timer_interrupt(irq, dev_id, regs);
-}
-
-
-/*
- * vr4181_time_init:
- *
- * We pick the following choices:
- *   . we use elapsed timer as the RTC.	 We set some reasonable init data since
- *     it does not persist across reset
- *   . we use RTC1 as the system timer interrupt source.
- *   . we use CPU counter for fast_gettimeoffset and we calivrate the cpu
- *     frequency.  In other words, we use calibrate_div64_gettimeoffset().
- *   . we use our own timer interrupt routine which clears the interrupt
- *     and then calls the generic high-level timer interrupt routine.
- *
- */
-
-extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
-
-static void
-vr4181_timer_setup(struct irqaction *irq)
-{
-	/* over-write the handler to be our own one */
-	irq->handler = vr4181_timer_interrupt;
-
-	/* sets up the frequency */
-	*VR4181_RTCL1LREG = COUNTS_PER_JIFFY;
-	*VR4181_RTCL1HREG = 0;
-
-	/* and ack any pending ints */
-	*VR4181_RTCINTREG = 0x2;
-
-	/* setup irqaction */
-	setup_irq(VR4181_IRQ_INT1, irq);
-
-}
-
-void
-vr4181_init_time(void)
-{
-	/* setup hookup functions */
-	rtc_get_time = vr4181_rtc_get_time;
-	rtc_set_time = vr4181_rtc_set_time;
-
-	board_timer_setup = vr4181_timer_setup;
-}
-