The OMAP4 x-load code sets gptimer1 clock source to 32Khz. This isn't acceptable for udelay. This patch changes from gptimer1 to gptimer2, which uses sys_clk at 38.4 Mhz.
Signed-off-by: Steve Sakoman steve@sakoman.com --- arch/arm/cpu/armv7/omap-common/timer.c | 9 --------- include/configs/omap4_panda.h | 2 +- include/configs/omap4_sdp4430.h | 2 +- 3 files changed, 2 insertions(+), 11 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap-common/timer.c b/arch/arm/cpu/armv7/omap-common/timer.c index 69e285f..6b8cf7b 100644 --- a/arch/arm/cpu/armv7/omap-common/timer.c +++ b/arch/arm/cpu/armv7/omap-common/timer.c @@ -41,12 +41,8 @@ static struct gptimer *timer_base = (struct gptimer *)CONFIG_SYS_TIMERBASE;
/* * Nothing really to do with interrupts, just starts up a counter. - * We run the counter with 13MHz, divided by 8, resulting in timer - * frequency of 1.625MHz. With 32bit counter register, counter - * overflows in ~44min */
-/* 13MHz / 8 = 1.625MHz */ #define TIMER_CLOCK (V_SCLK / (2 << CONFIG_SYS_PTV)) #define TIMER_LOAD_VAL 0xffffffff
@@ -84,11 +80,6 @@ void set_timer(ulong t) /* delay x useconds */ void __udelay(unsigned long usec) { -#if defined(CONFIG_OMAP44XX) - /* TODO temporary hack until OMAP4 clock setup routines are present */ - if (usec > 1000) - usec = usec/1000; -#endif long tmo = usec * (TIMER_CLOCK / 1000) / 1000; unsigned long now, last = readl(&timer_base->tcrr);
diff --git a/include/configs/omap4_panda.h b/include/configs/omap4_panda.h index 0c5ef7b..0fb1ad3 100644 --- a/include/configs/omap4_panda.h +++ b/include/configs/omap4_panda.h @@ -196,7 +196,7 @@ #define CONFIG_SYS_LOAD_ADDR 0x80000000
/* Use General purpose timer 1 */ -#define CONFIG_SYS_TIMERBASE GPT1_BASE +#define CONFIG_SYS_TIMERBASE GPT2_BASE #define CONFIG_SYS_PTV 2 /* Divisor: 2^(PTV+1) => 8 */ #define CONFIG_SYS_HZ 1000
diff --git a/include/configs/omap4_sdp4430.h b/include/configs/omap4_sdp4430.h index ede7691..ef5272b 100644 --- a/include/configs/omap4_sdp4430.h +++ b/include/configs/omap4_sdp4430.h @@ -197,7 +197,7 @@ #define CONFIG_SYS_LOAD_ADDR 0x80000000
/* Use General purpose timer 1 */ -#define CONFIG_SYS_TIMERBASE GPT1_BASE +#define CONFIG_SYS_TIMERBASE GPT2_BASE #define CONFIG_SYS_PTV 2 /* Divisor: 2^(PTV+1) => 8 */ #define CONFIG_SYS_HZ 1000