diff options
| author | Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com> | 2019-06-04 11:24:25 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-10-18 12:20:44 +0000 |
| commit | 8d5313774982d9d637683ec1de0f53528aa700ee (patch) | |
| tree | 095dbd6410f25db7f913906227195f7d509adb1b /src/soc/mediatek/mt8183/mt6358.c | |
| parent | beeab4e6f3e5854409b48b518f074448a66ca262 (diff) | |
soc/mediatek/mt8183: Allow modifying vdram1 voltage
DRAM DVFS needs to be calibrated with different vdram1 voltages to get
correct parameters.
A new API is added to allow changing vdram1 voltage.
BUG=b:80501386
BRANCH=none
TEST=measure vdram1 voltage with multimeter
Change-Id: Ia15ab3a2e1668e5b4873d317b57a38ebee037709
Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33186
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/mediatek/mt8183/mt6358.c')
| -rw-r--r-- | src/soc/mediatek/mt8183/mt6358.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8183/mt6358.c b/src/soc/mediatek/mt8183/mt6358.c index 3600b6a3de..9ee27b958f 100644 --- a/src/soc/mediatek/mt8183/mt6358.c +++ b/src/soc/mediatek/mt8183/mt6358.c @@ -826,6 +826,27 @@ void pmic_set_vcore_vol(unsigned int vcore_uv) pwrap_write_field(PMIC_VCORE_VOSEL, vol_reg, 0x7F, 0); } +unsigned int pmic_get_vdram1_vol(void) +{ + unsigned int vol_reg; + + vol_reg = pwrap_read_field(PMIC_VDRAM1_DBG0, 0x7F, 0); + return 500000 + vol_reg * 12500; +} + +void pmic_set_vdram1_vol(unsigned int vdram_uv) +{ + unsigned int vol_reg; + + assert(vdram_uv >= 500000); + assert(vdram_uv <= 1300000); + + vol_reg = (vdram_uv - 500000) / 12500; + + pwrap_write_field(PMIC_VDRAM1_OP_EN, 1, 0x7F, 0); + pwrap_write_field(PMIC_VDRAM1_VOSEL, vol_reg, 0x7F, 0); +} + static void pmic_wdt_set(void) { /* [5]=1, RG_WDTRSTB_DEB */ |