Merge branch 'master' of http://git.denx.de/u-boot-sunxi

[u-boot] / arch / arm / cpu / armv7 / highbank / timer.c

diff --git a/arch/arm/cpu/armv7/highbank/timer.c b/arch/arm/cpu/armv7/highbank/timer.c
index d92503f75126f81ac14fde2179e188133681d66c..d56bf21133c5a3d05c30cb2d79862f3b91231c9c 100644 (file)
--- a/arch/arm/cpu/armv7/highbank/timer.c
+++ b/arch/arm/cpu/armv7/highbank/timer.c
@@ -3,33 +3,16 @@
  *
  * Based on arm926ejs/mx27/timer.c
  *
- * 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 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, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
-#include <div64.h>
-#include <linux/types.h>        /* for size_t */
-#include <linux/stddef.h>       /* for NULL */
 #include <asm/io.h>
 #include <asm/arch-armv7/systimer.h>
 
 #undef SYSTIMER_BASE
 #define SYSTIMER_BASE          0xFFF34000      /* Timer 0 and 1 base   */
-#define SYSTIMER_RATE          150000000
 
-static ulong timestamp;
-static ulong lastinc;
 static struct systimer *systimer_base = (struct systimer *)SYSTIMER_BASE;
 
 /*
@@ -40,89 +23,12 @@ int timer_init(void)
        /*
         * Setup timer0
         */
+       writel(0, &systimer_base->timer0control);
        writel(SYSTIMER_RELOAD, &systimer_base->timer0load);
        writel(SYSTIMER_RELOAD, &systimer_base->timer0value);
-       writel(SYSTIMER_EN | SYSTIMER_32BIT, &systimer_base->timer0control);
-
-       reset_timer_masked();
+       writel(SYSTIMER_EN | SYSTIMER_32BIT | SYSTIMER_PRESC_256,
+               &systimer_base->timer0control);
 
        return 0;
 
 }
-
-#define TICK_PER_TIME  ((SYSTIMER_RATE + CONFIG_SYS_HZ / 2) / CONFIG_SYS_HZ)
-#define NS_PER_TICK    (1000000000 / SYSTIMER_RATE)
-
-static inline unsigned long long tick_to_time(unsigned long long tick)
-{
-       do_div(tick, TICK_PER_TIME);
-       return tick;
-}
-
-static inline unsigned long long time_to_tick(unsigned long long time)
-{
-       return time * TICK_PER_TIME;
-}
-
-static inline unsigned long long us_to_tick(unsigned long long us)
-{
-       unsigned long long tick = us << 16;
-       tick += NS_PER_TICK - 1;
-       do_div(tick, NS_PER_TICK);
-       return tick >> 16;
-}
-
-unsigned long long get_ticks(void)
-{
-       ulong now = ~readl(&systimer_base->timer0value);
-
-       if (now >= lastinc)     /* normal mode (non roll) */
-               /* move stamp forward with absolut diff ticks */
-               timestamp += (now - lastinc);
-       else                    /* we have rollover of incrementer */
-               timestamp += (0xFFFFFFFF - lastinc) + now;
-       lastinc = now;
-       return timestamp;
-}
-
-/*
- * Delay x useconds AND preserve advance timstamp value
- *     assumes timer is ticking at 1 msec
- */
-void __udelay(ulong usec)
-{
-       unsigned long long tmp;
-       ulong tmo;
-
-       tmo = us_to_tick(usec);
-       tmp = get_ticks() + tmo;        /* get current timestamp */
-
-       while (get_ticks() < tmp)       /* loop till event */
-                /*NOP*/;
-}
-
-ulong get_timer(ulong base)
-{
-       return get_timer_masked() - base;
-}
-
-void reset_timer_masked(void)
-{
-       lastinc = ~readl(&systimer_base->timer0value);
-       timestamp = 0;
-}
-
-void reset_timer(void)
-{
-       reset_timer_masked();
-}
-
-ulong get_timer_masked(void)
-{
-       return tick_to_time(get_ticks());
-}
-
-ulong get_tbclk(void)
-{
-       return CONFIG_SYS_HZ;
-}