diff options
| author | Moritz Fischer <moritz.fischer@ettus.com> | 2019-01-02 16:26:12 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-01-09 06:26:08 -0800 |
| commit | c78bd78daca4d6a3f5befbfe9475eaf306e5238e (patch) | |
| tree | ac2c91fead6e4ea02b484c2759785ab7ae9ba6db | |
| parent | 7ced9b2e02cdb49b78384ecb93978c1bab5cd015 (diff) | |
| download | chrome-ec-stabilize-11554.B.tar.gz | |
chip: stm32: clock-stm32f4: Implement rtc_set() for RTCstabilize-11554.B
Implement rtc_set() function for STM32F4 chip variant
BUG=none
BRANCH=none
TEST=Using eval-board, use rtc set 0, observe increments
Change-Id: I63abe0c388b7a0ba9ed881b393ffdbcc69e6d75a
Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Reviewed-on: https://chromium-review.googlesource.com/1401017
Reviewed-by: Philip Chen <philipchen@chromium.org>
| -rw-r--r-- | chip/stm32/clock-stm32f4.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/chip/stm32/clock-stm32f4.c b/chip/stm32/clock-stm32f4.c index 5ece4fde27..8dbfd2fcca 100644 --- a/chip/stm32/clock-stm32f4.c +++ b/chip/stm32/clock-stm32f4.c @@ -34,12 +34,12 @@ #define RTC_PREDIV_S (RTC_FREQ - 1) #define US_PER_RTC_TICK (1000000 / RTC_FREQ) -int32_t rtc_ssr_to_us(uint32_t rtcss) +int32_t rtcss_to_us(uint32_t rtcss) { return ((RTC_PREDIV_S - rtcss) * US_PER_RTC_TICK); } -uint32_t us_to_rtc_ssr(int32_t us) +uint32_t us_to_rtcss(int32_t us) { return (RTC_PREDIV_S - (us / US_PER_RTC_TICK)); } @@ -267,3 +267,31 @@ void rtc_init(void) rtc_lock_regs(); } + +#if defined(CONFIG_CMD_RTC) || defined(CONFIG_HOSTCMD_RTC) +void rtc_set(uint32_t sec) +{ + struct rtc_time_reg rtc; + + sec_to_rtc(sec, &rtc); + rtc_unlock_regs(); + + /* Disable alarm */ + STM32_RTC_CR &= ~STM32_RTC_CR_ALRAE; + + /* Enter RTC initialize mode */ + STM32_RTC_ISR |= STM32_RTC_ISR_INIT; + while (!(STM32_RTC_ISR & STM32_RTC_ISR_INITF)) + ; + + /* Set clock prescalars */ + STM32_RTC_PRER = (RTC_PREDIV_A << 16) | RTC_PREDIV_S; + + STM32_RTC_TR = rtc.rtc_tr; + STM32_RTC_DR = rtc.rtc_dr; + /* Start RTC timer */ + STM32_RTC_ISR &= ~STM32_RTC_ISR_INIT; + + rtc_lock_regs(); +} +#endif |