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bsp/mpc55xx: Add MPC55XX_SYSTEM_CLOCK_DIVIDER

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This commit is contained in:
Sebastian Huber
2012-07-18 09:26:13 +02:00
parent b9b3f3b7ce
commit dafacfa742
3 changed files with 9 additions and 6 deletions
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5
c/src/lib/libbsp/powerpc/mpc55xxevb/configure.ac
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@@ -73,6 +73,11 @@ RTEMS_BSPOPTS_SET([MPC55XX_FMPLL_MFD],[*] ,[12])
RTEMS_BSPOPTS_HELP([MPC55XX_FMPLL_MFD],
[Must be defined to be the PLL multiplication factor for clock generation])
RTEMS_BSPOPTS_SET([MPC55XX_SYSTEM_CLOCK_DIVIDER],[mpc5674f*],[2])
RTEMS_BSPOPTS_SET([MPC55XX_SYSTEM_CLOCK_DIVIDER],[*],[1])
RTEMS_BSPOPTS_HELP([MPC55XX_SYSTEM_CLOCK_DIVIDER],
[system clock divider])
RTEMS_BSPOPTS_SET([MPC55XX_EMIOS_PRESCALER],[gwlcfm],[66])
RTEMS_BSPOPTS_SET([MPC55XX_EMIOS_PRESCALER],[mpc5643l*],[])
RTEMS_BSPOPTS_SET([MPC55XX_EMIOS_PRESCALER],[*] ,[1])

3
c/src/lib/libbsp/powerpc/mpc55xxevb/include/bspopts.h.in
View File

@@ -83,6 +83,9 @@
generation */
#undef MPC55XX_REFERENCE_CLOCK
/* system clock divider */
#undef MPC55XX_SYSTEM_CLOCK_DIVIDER
/* Define to the address where bug reports for this package should be sent. */
#undef PACKAGE_BUGREPORT

7
c/src/lib/libbsp/powerpc/mpc55xxevb/startup/bspstart.c
View File

@@ -95,11 +95,6 @@ void bsp_start(void)
rtems_status_code sc = RTEMS_SUCCESSFUL;
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
#if defined(MPC55XX_BOARD_MPC5674FEVB)
unsigned system_clock_divider = 2;
#else
unsigned system_clock_divider = 1;
#endif
null_pointer_protection();
@@ -119,7 +114,7 @@ void bsp_start(void)
/*
* determine clock speed
*/
bsp_clock_speed = mpc55xx_get_system_clock() / system_clock_divider;
bsp_clock_speed = mpc55xx_get_system_clock() / MPC55XX_SYSTEM_CLOCK_DIVIDER;
/* Time reference value */
bsp_clicks_per_usec = bsp_clock_speed / 1000000;