Kconfig: fix SYS_CLOCK_HW_CYCLES_PER_SEC dependencies
Fixes the SYS_CLOCK_HW_CYCLES_PER_SEC Kconfig option dependencies such that it can be overridden by a modified platform configuration file. This is particularly important for the LOAPIC timer driver as SYS_CLOCK_HW_CYCLES_PER_SEC is dependent upon the target's CPU/bus frequency. Change-Id: I0fb49b4c540888cb1988c76e2a711a85e756f82c Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
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5 changed files with 19 additions and 9 deletions
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@ -41,6 +41,7 @@ config PHYS_LOAD_ADDR
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default 0x00100000
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config SYS_CLOCK_HW_CYCLES_PER_SEC
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default 150000000 if PLATFORM_ATOM_N28XX
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default 1193180 if PLATFORM_PCMINUTEIA
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default 150000000 if LOAPIC_TIMER
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default 25000000 if HPET_TIMER
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default 1193180 if PIT
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@ -42,7 +42,10 @@ config PHYS_LOAD_ADDR
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default 0x00100000
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config SYS_CLOCK_HW_CYCLES_PER_SEC
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default 25000000
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default 150000000 if LOAPIC_TIMER
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default 25000000 if HPET_TIMER
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default 1193180 if PIT
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config UART_CONSOLE_INDEX
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default 1
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@ -62,8 +62,8 @@ After reset, the timer is initialized to zero.
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* LOAPIC_TIMER_IRQ
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* LOAPIC_TIMER_INT_PRI
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*
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* A board support package's kconf file must provide the following constants:
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* CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC
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* NOTE: CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC must be provided by either the
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* platform configuration file or the project configuration file.
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*/
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#include <board.h>
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@ -43,6 +43,11 @@ that use timer functionality.
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#ifndef _ASMLANGUAGE
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#include <stdint.h>
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#if defined(CONFIG_SYS_CLOCK_EXISTS) && \
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(CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC == 0)
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#error "SYS_CLOCK_HW_CYCLES_PER_SEC must be non-zero!"
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#endif
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#define sys_clock_ticks_per_sec CONFIG_SYS_CLOCK_TICKS_PER_SEC
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#define sys_clock_hw_cycles_per_sec CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC
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@ -53,11 +53,12 @@ config SYS_CLOCK_TICKS_PER_SEC
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This option specifies the frequency of the system clock in Hz.
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config SYS_CLOCK_HW_CYCLES_PER_SEC
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int
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#The value is set by each platform's Kconfig file.
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int "System clock's h/w timer frequency"
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default 0
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help
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Frequency of the hardware timer used for the system clock
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(in Hz).
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This option specifies the frequency of the hardware timer used for the
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system clock (in Hz). It is normally set by the platform's defconfig file
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and the user should generally avoid modifying it via the menu configuration.
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config SYS_CLOCK_EXISTS
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bool
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