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cpu/msp430: improve periph_timer #20160

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merged 4 commits into from
Dec 10, 2023
Merged

cpu/msp430: improve periph_timer #20160

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7044699
cpu/msp430: improve periph_timer
maribu Dec 6, 2023
e6154a0
cpu/msp430: aid optimizer
maribu Dec 6, 2023
b51ea4c
boards: clean up MSP430 board configuration
maribu Dec 7, 2023
eca0bdd
examples,tests: Update `Makefile.ci`s
maribu Dec 10, 2023
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cpu/msp430: aid optimizer 
Declare functions retrieving the clock domains frequency as pure so
that common subexpressions can be eliminated more easily.
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@maribu
maribu committed Dec 10, 2023
commit e6154a04a185209da1b61f279d90fc61cc3a2564
5 changes: 3 additions & 2 deletions cpu/msp430/clock.c
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Expand Up @@ -348,7 +348,8 @@ void default_clock_init(void)

__attribute__((weak, alias("default_clock_init"))) void clock_init(void);

uint32_t msp430_submain_clock_freq(void) {
uint32_t PURE msp430_submain_clock_freq(void)
{
uint16_t shift = (clock_params.submain_clock_divier >> 1) & 0x3;
switch (clock_params.submain_clock_source) {
case SUBMAIN_CLOCK_SOURCE_LFXT1CLK:
Expand All @@ -365,7 +366,7 @@ uint32_t msp430_submain_clock_freq(void) {
}
}

uint32_t msp430_auxiliary_clock_freq(void)
uint32_t PURE msp430_auxiliary_clock_freq(void)
{
uint16_t shift = (clock_params.auxiliary_clock_divier >> 4) & 0x3;
return clock_params.lfxt1_frequency >> shift;
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4 changes: 2 additions & 2 deletions cpu/msp430/include/periph_cpu_common.h
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Expand Up @@ -358,14 +358,14 @@ void clock_init(void);
*
* @note This is only useful when implementing MSP430 peripheral drivers
*/
uint32_t msp430_submain_clock_freq(void);
uint32_t PURE msp430_submain_clock_freq(void);

/**
* @brief Get the configured auxiliary clock frequency
*
* @note This is only useful when implementing MSP430 peripheral drivers
*/
uint32_t msp430_auxiliary_clock_freq(void);
uint32_t PURE msp430_auxiliary_clock_freq(void);

#ifdef __cplusplus
}
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