From: Rob Herring rob.herring@calxeda.com
Convert mx25 to use the commmon timer code.
Signed-off-by: Rob Herring rob.herring@calxeda.com ---
v2: - Use GPT struct for register offset
arch/arm/cpu/arm926ejs/mx25/timer.c | 117 ------------------------------------ include/configs/mx25pdk.h | 4 ++ include/configs/tx25.h | 5 +- include/configs/zmx25.h | 6 ++ 4 files changed, 14 insertions(+), 118 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/mx25/timer.c b/arch/arm/cpu/arm926ejs/mx25/timer.c index 42b6076..7f19791 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 543c415..0a9f442 100644 --- a/include/configs/mx25pdk.h +++ b/include/configs/mx25pdk.h @@ -16,6 +16,10 @@ #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 93dd3c5..beea612 100644 --- a/include/configs/tx25.h +++ b/include/configs/tx25.h @@ -16,6 +16,9 @@ #define CONFIG_MX25 #define CONFIG_MX25_CLK32 32000 /* OSC32K frequency */ #define CONFIG_SYS_HZ 1000 +#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 765b849..ee48429 100644 --- a/include/configs/zmx25.h +++ b/include/configs/zmx25.h @@ -10,11 +10,17 @@ #ifndef __CONFIG_H #define __CONFIG_H
+#include <asm/arch/imx-regs.h> + #define CONFIG_ARM926EJS /* arm926ejs CPU core */ #define CONFIG_MX25 #define CONFIG_SYS_HZ 1000 #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