mediatek/mt8183: Enable RTC eosc calibration feature to save power
When system shuts down, RTC enable eosc calibration feature to save
power. Then coreboot RTC driver need to call rtc_enable_dcxo function
at every boot to switch RTC clock source to dcxo.
*** Cherry-pick from coreboot.org, for fixing reboot issue ***
BUG=b:128467245
BRANCH=none
TEST=Boots correctly on Kukui
Change-Id: Iee21e7611df8959cbbc63b6e6655cfb462147748
Signed-off-by: Ran Bi <ran.bi@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/1626168
Reviewed-by: YH Lin <yueherngl@chromium.org>
Commit-Queue: YH Lin <yueherngl@chromium.org>
Tested-by: YH Lin <yueherngl@chromium.org>
diff --git a/src/soc/mediatek/mt8183/rtc.c b/src/soc/mediatek/mt8183/rtc.c
index 62256eb..ba05f86 100644
--- a/src/soc/mediatek/mt8183/rtc.c
+++ b/src/soc/mediatek/mt8183/rtc.c
@@ -197,12 +197,6 @@
goto err;
}
- /* using dcxo 32K clock */
- if (!rtc_enable_dcxo()) {
- ret = -RTC_STATUS_OSC_SETTING_FAIL;
- goto err;
- }
-
if (recover)
mdelay(20);
@@ -311,6 +305,10 @@
pwrap_write_field(PMIC_RG_DCXO_CW02, 0xF, 0xF, 0);
pwrap_write_field(PMIC_RG_SCK_TOP_CON0, 0x1, 0x1, 0);
+ /* using dcxo 32K clock */
+ if (!rtc_enable_dcxo())
+ rtc_info("rtc_enable_dcxo() fail\n");
+
rtc_boot_common();
rtc_bbpu_power_on();
}
