Merge branch 'master' of git://www.denx.de/git/u-boot-imx

[u-boot] / arch / arm / cpu / arm1136 / mx31 / timer.c

diff --git a/arch/arm/cpu/arm1136/mx31/timer.c b/arch/arm/cpu/arm1136/mx31/timer.c
index 36266da5aa8d68430f9a88313020055cc382d18a..3a81ce427ca64566ab9f397c1e77cc4e5547b943 100644 (file)
--- a/arch/arm/cpu/arm1136/mx31/timer.c
+++ b/arch/arm/cpu/arm1136/mx31/timer.c
@@ -2,30 +2,11 @@
  * (C) Copyright 2007
  * Sascha Hauer, Pengutronix
  *
- * 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>
 #include <asm/arch/imx-regs.h>
-#include <asm/arch/clock.h>
-#include <div64.h>
-#include <watchdog.h>
 #include <asm/io.h>
 
 #define TIMER_BASE 0x53f90000 /* General purpose timer 1 */
@@ -44,57 +25,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-/*
- * "time" is measured in 1 / CONFIG_SYS_HZ seconds,
- * "tick" is internal timer period
- */
-
-#ifdef CONFIG_MX31_TIMER_HIGH_PRECISION
-/* ~0.4% error - measured with stop-watch on 100s boot-delay */
-static inline unsigned long long tick_to_time(unsigned long long tick)
-{
-       tick *= CONFIG_SYS_HZ;
-       do_div(tick, MXC_CLK32);
-       return tick;
-}
-
-static inline unsigned long long time_to_tick(unsigned long long time)
-{
-       time *= MXC_CLK32;
-       do_div(time, CONFIG_SYS_HZ);
-       return time;
-}
-
-static inline unsigned long long us_to_tick(unsigned long long us)
-{
-       us = us * MXC_CLK32 + 999999;
-       do_div(us, 1000000);
-       return us;
-}
-#else
-/* ~2% error */
-#define TICK_PER_TIME  ((MXC_CLK32 + CONFIG_SYS_HZ / 2) / CONFIG_SYS_HZ)
-#define US_PER_TICK    (1000000 / MXC_CLK32)
-
-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)
-{
-       us += US_PER_TICK - 1;
-       do_div(us, US_PER_TICK);
-       return us;
-}
-#endif
-
 /* The 32768Hz 32-bit timer overruns in 131072 seconds */
 int timer_init(void)
 {
@@ -111,92 +41,7 @@ int timer_init(void)
        return 0;
 }
 
-unsigned long long get_ticks(void)
+unsigned long timer_read_counter(void)
 {
-       ulong now = GPTCNT; /* current tick value */
-
-       if (now >= gd->lastinc) /* normal mode (non roll) */
-               /* move stamp forward with absolut diff ticks */
-               gd->tbl += (now - gd->lastinc);
-       else                    /* we have rollover of incrementer */
-               gd->tbl += (0xFFFFFFFF - gd->lastinc) + now;
-       gd->lastinc = now;
-       return gd->tbl;
-}
-
-ulong get_timer_masked(void)
-{
-       /*
-        * get_ticks() returns a long long (64 bit), it wraps in
-        * 2^64 / MXC_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~
-        * 5 * 10^9 days... and get_ticks() * CONFIG_SYS_HZ wraps in
-        * 5 * 10^6 days - long enough.
-        */
-       return tick_to_time(get_ticks());
-}
-
-ulong get_timer(ulong base)
-{
-       return get_timer_masked() - base;
-}
-
-/* delay x useconds AND preserve advance timestamp value */
-void __udelay(unsigned long 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*/;
-}
-
-/*
- * 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)
-{
-       return MXC_CLK32;
-}
-
-void reset_cpu(ulong addr)
-{
-       struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE;
-       wdog->wcr = WDOG_ENABLE;
-       while (1)
-               ;
-}
-
-#ifdef CONFIG_HW_WATCHDOG
-void mxc_hw_watchdog_enable(void)
-{
-       struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE;
-       u16 secs;
-
-       /*
-        * The timer watchdog can be set between
-        * 0.5 and 128 Seconds. If not defined
-        * in configuration file, sets 64 Seconds
-        */
-#ifdef CONFIG_SYS_WD_TIMER_SECS
-       secs = (CONFIG_SYS_WD_TIMER_SECS << 1) & 0xFF;
-       if (!secs) secs = 1;
-#else
-       secs = 64;
-#endif
-       setbits_le16(&wdog->wcr, (secs << WDOG_WT_SHIFT) | WDOG_ENABLE
-                                                        | WDOG_WDZST);
-}
-
-
-void mxc_hw_watchdog_reset(void)
-{
-       struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE;
-
-       writew(0x5555, &wdog->wsr);
-       writew(0xAAAA, &wdog->wsr);
+       return GPTCNT;
 }
-#endif