Patchwork [U-Boot,6/9] ARM: mx27: convert to common timer code

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Submitter Rob Herring
Date Sept. 8, 2013, 8:12 p.m.
Message ID <1378671174-18535-7-git-send-email-robherring2@gmail.com>
Download mbox | patch
Permalink /patch/273458/
State Superseded
Delegated to: Tom Rini
Headers show

Comments

Rob Herring - Sept. 8, 2013, 8:12 p.m.
From: Rob Herring <rob.herring@calxeda.com>

Convert mx27 to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
---
 arch/arm/cpu/arm926ejs/mx27/timer.c | 110 ------------------------------------
 include/configs/imx27lite-common.h  |   3 +
 2 files changed, 3 insertions(+), 110 deletions(-)

Patch

diff --git a/arch/arm/cpu/arm926ejs/mx27/timer.c b/arch/arm/cpu/arm926ejs/mx27/timer.c
index 40fe2aa..b64875a 100644
--- a/arch/arm/cpu/arm926ejs/mx27/timer.c
+++ b/arch/arm/cpu/arm926ejs/mx27/timer.c
@@ -17,7 +17,6 @@ 
  */
 
 #include <common.h>
-#include <div64.h>
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
 
@@ -27,62 +26,6 @@ 
 #define GPTCR_CLKSOURCE_32	(4 << 1)	/* Clock source		*/
 #define GPTCR_TEN		1		/* Timer enable		*/
 
-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_MX27_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, CONFIG_MX27_CLK32);
-	return tick;
-}
-
-static inline unsigned long long time_to_tick(unsigned long long time)
-{
-	time *= CONFIG_MX27_CLK32;
-	do_div(time, CONFIG_SYS_HZ);
-	return time;
-}
-
-static inline unsigned long long us_to_tick(unsigned long long us)
-{
-	us = us * CONFIG_MX27_CLK32 + 999999;
-	do_div(us, 1000000);
-	return us;
-}
-#else
-/* ~2% error */
-#define TICK_PER_TIME	((CONFIG_MX27_CLK32 + CONFIG_SYS_HZ / 2) / \
-		CONFIG_SYS_HZ)
-#define US_PER_TICK	(1000000 / CONFIG_MX27_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 32768Hz 32-bit timer overruns in 131072 seconds */
 int timer_init(void)
@@ -107,56 +50,3 @@  int timer_init(void)
 
 	return 0;
 }
-
-unsigned long long get_ticks(void)
-{
-	struct gpt_regs *regs = (struct gpt_regs *)IMX_TIM1_BASE;
-	ulong now = readl(&regs->gpt_tcn); /* 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 / CONFIG_MX27_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*/;
-}
-
-ulong get_tbclk(void)
-{
-	return CONFIG_MX27_CLK32;
-}
diff --git a/include/configs/imx27lite-common.h b/include/configs/imx27lite-common.h
index 8236133..3c825df 100644
--- a/include/configs/imx27lite-common.h
+++ b/include/configs/imx27lite-common.h
@@ -17,6 +17,9 @@ 
 #define CONFIG_MX27
 #define CONFIG_MX27_CLK32	32768		/* OSC32K frequency */
 
+#define CONFIG_SYS_TIMER_RATE		CONFIG_MX27_CLK32
+#define CONFIG_SYS_TIMER_COUNTER	(0x10003000 + 0x10)
+
 #define CONFIG_DISPLAY_BOARDINFO
 #define CONFIG_DISPLAY_CPUINFO