From: Rob Herring <rob.herring@calxeda.com>
Date: Fri, 4 Oct 2013 15:22:44 +0000 (-0500)
Subject: ARM: mx25: convert to common timer code
X-Git-Url: http://git.ipfire.org/?p=people%2Fms%2Fu-boot.git;a=commitdiff_plain;h=3dae5b510eb966214a3cc32476ca4e45029f087e

ARM: mx25: convert to common timer code

Convert mx25 to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
---

diff --git a/arch/arm/cpu/arm926ejs/mx25/timer.c b/arch/arm/cpu/arm926ejs/mx25/timer.c
index 42b6076c1f..7f19791736 100644
--- a/arch/arm/cpu/arm926ejs/mx25/timer.c
+++ b/arch/arm/cpu/arm926ejs/mx25/timer.c
@@ -21,65 +21,8 @@
  */
 
 #include <common.h>
-#include <div64.h>
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
-#include <asm/arch/clock.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#define timestamp	(gd->arch.tbl)
-#define lastinc		(gd->arch.lastinc)
-
-/*
- * "time" is measured in 1 / CONFIG_SYS_HZ seconds,
- * "tick" is internal timer period
- */
-#ifdef CONFIG_MX25_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
 
 /* nothing really to do with interrupts, just starts up a counter. */
 /* The 32KHz 32-bit timer overruns in 134217 seconds */
@@ -104,63 +47,3 @@ int timer_init(void)
 
 	return 0;
 }
-
-unsigned long long get_ticks(void)
-{
-	struct gpt_regs *gpt = (struct gpt_regs *)IMX_GPT1_BASE;
-	ulong now = readl(&gpt->counter); /* current tick value */
-
-	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;
-}
-
-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 timstamp 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)
-{
-	ulong tbclk;
-
-	tbclk = MXC_CLK32;
-	return tbclk;
-}
diff --git a/include/configs/mx25pdk.h b/include/configs/mx25pdk.h
index e48798c70a..a64bafed6e 100644
--- a/include/configs/mx25pdk.h
+++ b/include/configs/mx25pdk.h
@@ -15,6 +15,10 @@
 #define CONFIG_SYS_TEXT_BASE		0x81200000
 #define CONFIG_MXC_GPIO
 
+#define CONFIG_SYS_TIMER_RATE		32768
+#define CONFIG_SYS_TIMER_COUNTER	\
+	(&((struct gpt_regs *)IMX_GPT1_BASE)->counter)
+
 #define CONFIG_DISPLAY_CPUINFO
 #define CONFIG_DISPLAY_BOARDINFO
 
diff --git a/include/configs/tx25.h b/include/configs/tx25.h
index edd1f48f36..5ac6e6441c 100644
--- a/include/configs/tx25.h
+++ b/include/configs/tx25.h
@@ -15,6 +15,9 @@
  */
 #define CONFIG_MX25
 #define CONFIG_MX25_CLK32		32000	/* OSC32K frequency */
+#define CONFIG_SYS_TIMER_RATE		CONFIG_MX25_CLK32
+#define CONFIG_SYS_TIMER_COUNTER	\
+	(&((struct gpt_regs *)IMX_GPT1_BASE)->counter)
 
 #define	CONFIG_SYS_MONITOR_LEN		(256 << 10)	/* 256 kB for U-Boot */
 
diff --git a/include/configs/zmx25.h b/include/configs/zmx25.h
index 2e7f14586a..8ffe6f1e08 100644
--- a/include/configs/zmx25.h
+++ b/include/configs/zmx25.h
@@ -10,10 +10,16 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+#include <asm/arch/imx-regs.h>
+
 #define CONFIG_ARM926EJS			/* arm926ejs CPU core */
 #define CONFIG_MX25
 #define CONFIG_SYS_TEXT_BASE		0xA0000000
 
+#define CONFIG_SYS_TIMER_RATE		32768
+#define CONFIG_SYS_TIMER_COUNTER	\
+	(&((struct gpt_regs *)IMX_GPT1_BASE)->counter)
+
 #define CONFIG_MACH_TYPE	MACH_TYPE_ZMX25
 /*
  * Environment settings