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plat/fvp: Dynamic description of clock freq 

Query clock frequency in runtime using FCONF getter API

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: Ie6a8a62d8d190b9994feffb167a1d48829913e9b
This commit is contained in:
laurenw-arm 2020-06-10 16:33:18 -05:00
parent 8aa374b9fe
commit 156dbdd464
1 changed files with 25 additions and 0 deletions
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25
plat/arm/board/fvp/fvp_bl31_setup.c
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@ -7,7 +7,9 @@
#include <assert.h>
#include <common/debug.h>
#include <drivers/arm/smmu_v3.h>
#include <fconf_hw_config_getter.h>
#include <lib/fconf/fconf.h>
#include <lib/mmio.h>
#include <plat/arm/common/arm_config.h>
#include <plat/arm/common/plat_arm.h>
#include <plat/common/platform.h>
@ -65,3 +67,26 @@ void __init bl31_plat_arch_setup(void)
fconf_populate("HW_CONFIG", hw_config_dtb);
#endif
}
unsigned int plat_get_syscnt_freq2(void)
{
unsigned int counter_base_frequency;
#if !RESET_TO_BL31 && !BL2_AT_EL3
/* Get the frequency through FCONF API for HW_CONFIG */
counter_base_frequency = FCONF_GET_PROPERTY(hw_config, cpu_timer, clock_freq);
if (counter_base_frequency > 0U) {
return counter_base_frequency;
}
#endif
/* Read the frequency from Frequency modes table */
counter_base_frequency = mmio_read_32(ARM_SYS_CNTCTL_BASE + CNTFID_OFF);
/* The first entry of the frequency modes table must not be 0 */
if (counter_base_frequency == 0U) {
panic();
}
return counter_base_frequency;
}