ARM: MXS: fix Uninitialized variable error

[u-boot] / arch / arm / cpu / arm926ejs / versatile / timer.c

diff --git a/arch/arm/cpu/arm926ejs/versatile/timer.c b/arch/arm/cpu/arm926ejs/versatile/timer.c
index 0e51a6383069ca03d903b4038f516479f4e4876b..5d694d85ef687586b7559fa635ae87ac69091d46 100644 (file)
--- a/arch/arm/cpu/arm926ejs/versatile/timer.c
+++ b/arch/arm/cpu/arm926ejs/versatile/timer.c
@@ -16,37 +16,11 @@
  * (C) Copyright 2004
  * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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.
- *
- * 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.         See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
 
-#define TIMER_LOAD_VAL 0xffffffff
-
-/* macro to read the 32 bit timer */
-#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4))
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#define timestamp gd->tbl
-#define lastdec gd->lastinc
-
 #define TIMER_ENABLE   (1 << 7)
 #define TIMER_MODE_MSK (1 << 6)
 #define TIMER_MODE_FR  (0 << 6)
@@ -85,118 +59,6 @@ int timer_init (void)
 
        *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = tmr_ctrl_val;
 
-       /* init the timestamp and lastdec value */
-       reset_timer_masked();
-
        return 0;
 }
 
-/*
- * timer without interrupts
- */
-
-void reset_timer (void)
-{
-       reset_timer_masked ();
-}
-
-ulong get_timer (ulong base)
-{
-       return get_timer_masked () - base;
-}
-
-/* delay x useconds AND preserve advance timestamp value */
-void __udelay (unsigned long usec)
-{
-       ulong tmo, tmp;
-
-       if(usec >= 1000){               /* if "big" number, spread normalization to seconds */
-               tmo = usec / 1000;      /* start to normalize for usec to ticks per sec */
-               tmo *= CONFIG_SYS_HZ;   /* find number of "ticks" to wait to achieve target */
-               tmo /= 1000;            /* finish normalize. */
-       }else{                          /* else small number, don't kill it prior to HZ multiply */
-               tmo = usec * CONFIG_SYS_HZ;
-               tmo /= (1000*1000);
-       }
-
-       tmp = get_timer (0);            /* get current timestamp */
-       if( (tmo + tmp + 1) < tmp )     /* if setting this fordward will roll time stamp */
-               reset_timer_masked ();  /* reset "advancing" timestamp to 0, set lastdec value */
-       else
-               tmo += tmp;             /* else, set advancing stamp wake up time */
-
-       while (get_timer_masked () < tmo)/* loop till event */
-               /*NOP*/;
-}
-
-void reset_timer_masked (void)
-{
-       /* reset time */
-       lastdec = READ_TIMER;  /* capure current decrementer value time */
-       timestamp = 0;         /* start "advancing" time stamp from 0 */
-}
-
-ulong get_timer_masked (void)
-{
-       ulong now = READ_TIMER;         /* current tick value */
-
-       if (lastdec >= now) {           /* normal mode (non roll) */
-               /* normal mode */
-               timestamp += lastdec - now; /* move stamp fordward with absoulte diff ticks */
-       } else {                        /* we have overflow of the count down timer */
-               /* nts = ts + ld + (TLV - now)
-                * ts=old stamp, ld=time that passed before passing through -1
-                * (TLV-now) amount of time after passing though -1
-                * nts = new "advancing time stamp"...it could also roll and cause problems.
-                */
-               timestamp += lastdec + TIMER_LOAD_VAL - now;
-       }
-       lastdec = now;
-
-       return timestamp;
-}
-
-/* waits specified delay value and resets timestamp */
-void udelay_masked (unsigned long usec)
-{
-       ulong tmo;
-       ulong endtime;
-       signed long diff;
-
-       if (usec >= 1000) {             /* if "big" number, spread normalization to seconds */
-               tmo = usec / 1000;      /* start to normalize for usec to ticks per sec */
-               tmo *= CONFIG_SYS_HZ;           /* find number of "ticks" to wait to achieve target */
-               tmo /= 1000;            /* finish normalize. */
-       } else {                        /* else small number, don't kill it prior to HZ multiply */
-               tmo = usec * CONFIG_SYS_HZ;
-               tmo /= (1000*1000);
-       }
-
-       endtime = get_timer_masked () + tmo;
-
-       do {
-               ulong now = get_timer_masked ();
-               diff = endtime - now;
-       } while (diff >= 0);
-}
-
-/*
- * This function is derived from PowerPC code (read timebase as long long).
- * On ARM it just returns the timer value.
- */
-unsigned long long get_ticks(void)
-{
-       return get_timer(0);
-}
-
-/*
- * This function is derived from PowerPC code (timebase clock frequency).
- * On ARM it returns the number of timer ticks per second.
- */
-ulong get_tbclk (void)
-{
-       ulong tbclk;
-
-       tbclk = CONFIG_SYS_HZ;
-       return tbclk;
-}