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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>
This commit is contained in:
Hsin-Hsiung Wang 2019-06-04 11:24:25 +08:00 committed by Patrick Georgi
parent beeab4e6f3
commit 8d53137749
2 changed files with 26 additions and 0 deletions
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5
src/soc/mediatek/mt8183/include/soc/mt6358.h
View File

@ -29,6 +29,9 @@ enum {
PMIC_VCORE_DBG0 = 0x149e,
PMIC_VCORE_VOSEL = 0x14aa,
PMIC_VDRAM1_VOSEL_SLEEP = 0x160a,
PMIC_VDRAM1_OP_EN = 0x1610,
PMIC_VDRAM1_DBG0 = 0x161e,
PMIC_VDRAM1_VOSEL = 0x1626,
PMIC_SMPS_ANA_CON0 = 0x1808,
PMIC_VSIM2_ANA_CON0 = 0x1e30,
};
@ -46,5 +49,7 @@ void pmic_set_vsim2_cali(unsigned int vsim2_mv);
void pmic_init_scp_voltage(void);
unsigned int pmic_get_vcore_vol(void);
void pmic_set_vcore_vol(unsigned int vcore_uv);
unsigned int pmic_get_vdram1_vol(void);
void pmic_set_vdram1_vol(unsigned int vdram_uv);
#endif /* __SOC_MEDIATEK_MT6358_H__ */

21
src/soc/mediatek/mt8183/mt6358.c
View File

@ -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 */