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| author | Benoît Thébaudeau <benoit.thebaudeau@advansee.com> | 2012-08-21 11:05:12 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2012-09-06 11:05:09 +0200 |
| commit | 1b2080f3388b70c4c37b69830f73a61c50cdd505 (patch) | |
| tree | 5aee8d7ee03a4e2a87eef606f8186f41604ef486 /arch/arm | |
| parent | 82e1b543b51fb514731992eeb2a6bdcdc279950e (diff) | |
| download | u-boot-imx-1b2080f3388b70c4c37b69830f73a61c50cdd505.zip u-boot-imx-1b2080f3388b70c4c37b69830f73a61c50cdd505.tar.gz u-boot-imx-1b2080f3388b70c4c37b69830f73a61c50cdd505.tar.bz2 | |
mx25: Define default SoC input clock frequencies
Define default SoC input clock frequencies for i.MX25 in order to get rid of
duplicated definitions.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Matthias Weisser <weisserm@arcor.de>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx25/generic.c | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx25/timer.c | 16 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx25/clock.h | 14 |
3 files changed, 23 insertions, 9 deletions
diff --git a/arch/arm/cpu/arm926ejs/mx25/generic.c b/arch/arm/cpu/arm926ejs/mx25/generic.c index a412a8f..90e584a 100644 --- a/arch/arm/cpu/arm926ejs/mx25/generic.c +++ b/arch/arm/cpu/arm926ejs/mx25/generic.c @@ -64,7 +64,7 @@ static unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref) static ulong imx_get_mpllclk(void) { struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE; - ulong fref = 24000000; + ulong fref = MXC_HCLK; return imx_decode_pll(readl(&ccm->mpctl), fref); } diff --git a/arch/arm/cpu/arm926ejs/mx25/timer.c b/arch/arm/cpu/arm926ejs/mx25/timer.c index 1cfd02b..4dc4041 100644 --- a/arch/arm/cpu/arm926ejs/mx25/timer.c +++ b/arch/arm/cpu/arm926ejs/mx25/timer.c @@ -40,6 +40,7 @@ #include <div64.h> #include <asm/io.h> #include <asm/arch/imx-regs.h> +#include <asm/arch/clock.h> DECLARE_GLOBAL_DATA_PTR; @@ -55,28 +56,27 @@ DECLARE_GLOBAL_DATA_PTR; static inline unsigned long long tick_to_time(unsigned long long tick) { tick *= CONFIG_SYS_HZ; - do_div(tick, CONFIG_MX25_CLK32); + do_div(tick, MXC_CLK32); return tick; } static inline unsigned long long time_to_tick(unsigned long long time) { - time *= CONFIG_MX25_CLK32; + 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 * CONFIG_MX25_CLK32 + 999999; + us = us * MXC_CLK32 + 999999; do_div(us, 1000000); return us; } #else /* ~2% error */ -#define TICK_PER_TIME ((CONFIG_MX25_CLK32 + CONFIG_SYS_HZ / 2) / \ - CONFIG_SYS_HZ) -#define US_PER_TICK (1000000 / CONFIG_MX25_CLK32) +#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) { @@ -144,7 +144,7 @@ ulong get_timer_masked(void) { /* * get_ticks() returns a long long (64 bit), it wraps in - * 2^64 / CONFIG_MX25_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~ + * 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. */ @@ -177,6 +177,6 @@ ulong get_tbclk(void) { ulong tbclk; - tbclk = CONFIG_MX25_CLK32; + tbclk = MXC_CLK32; return tbclk; } diff --git a/arch/arm/include/asm/arch-mx25/clock.h b/arch/arm/include/asm/arch-mx25/clock.h index 0f47eaf..a313b80 100644 --- a/arch/arm/include/asm/arch-mx25/clock.h +++ b/arch/arm/include/asm/arch-mx25/clock.h @@ -26,6 +26,20 @@ #ifndef __ASM_ARCH_CLOCK_H #define __ASM_ARCH_CLOCK_H +#include <common.h> + +#ifdef CONFIG_MX25_HCLK_FREQ +#define MXC_HCLK CONFIG_MX25_HCLK_FREQ +#else +#define MXC_HCLK 24000000 +#endif + +#ifdef CONFIG_MX25_CLK32 +#define MXC_CLK32 CONFIG_MX25_CLK32 +#else +#define MXC_CLK32 32768 +#endif + enum mxc_clock { MXC_CSI_CLK, MXC_EPIT_CLK, |