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Fix the passing of time on Armada XP.

Browse Source 
In order to become independent of Coherency Fabric frequency, configure
Timer and Watchdog to operate in 25MHz mode.

Submitted by:	Zbigniew Bodek <zbb@semihalf.com>
This commit is contained in:
Grzegorz Bernacki 2013-06-04 09:33:03 +00:00
parent df8c5665ac
commit 046b51bfdd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=251371
2 changed files with 12 additions and 1 deletions
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4
sys/arm/mv/mvreg.h
View File

@ -215,6 +215,10 @@
#define CPU_TIMER1_AUTO 0x00000008
#define CPU_TIMER_WD_EN 0x00000010
#define CPU_TIMER_WD_AUTO 0x00000020
/* 25MHz mode is Armada XP - specific */
#define CPU_TIMER_WD_25MHZ_EN 0x00000400
#define CPU_TIMER0_25MHZ_EN 0x00000800
#define CPU_TIMER1_25MHZ_EN 0x00001000
#define CPU_TIMER0_REL 0x10
#define CPU_TIMER0 0x14

9
sys/arm/mv/timer.c
View File

@ -56,7 +56,7 @@ __FBSDID("$FreeBSD$");
#define MAX_WATCHDOG_TICKS (0xffffffff)
#if defined(SOC_MV_ARMADAXP)
#define MV_CLOCK_SRC get_l2clk()
#define MV_CLOCK_SRC 25000000 /* Timers' 25MHz mode */
#else
#define MV_CLOCK_SRC get_tclk()
#endif
@ -323,6 +323,9 @@ mv_watchdog_enable(void)
val = mv_get_timer_control();
val |= CPU_TIMER_WD_EN | CPU_TIMER_WD_AUTO;
#if defined(SOC_MV_ARMADAXP)
val |= CPU_TIMER_WD_25MHZ_EN;
#endif
mv_set_timer_control(val);
}
@ -440,6 +443,10 @@ mv_setup_timers(void)
val = mv_get_timer_control();
val &= ~(CPU_TIMER0_EN | CPU_TIMER0_AUTO);
val |= CPU_TIMER1_EN | CPU_TIMER1_AUTO;
#if defined(SOC_MV_ARMADAXP)
/* Enable 25MHz mode */
val |= CPU_TIMER0_25MHZ_EN | CPU_TIMER1_25MHZ_EN;
#endif
mv_set_timer_control(val);
timers_initialized = 1;
}