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authorHsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>2019-06-04 11:24:25 +0800
committerPatrick Georgi <pgeorgi@google.com>2019-10-18 12:20:44 +0000
commit8d5313774982d9d637683ec1de0f53528aa700ee (patch)
tree095dbd6410f25db7f913906227195f7d509adb1b
parentbeeab4e6f3e5854409b48b518f074448a66ca262 (diff)
downloadcoreboot-8d5313774982d9d637683ec1de0f53528aa700ee.tar.xz
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>
-rw-r--r--src/soc/mediatek/mt8183/include/soc/mt6358.h5
-rw-r--r--src/soc/mediatek/mt8183/mt6358.c21
2 files changed, 26 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8183/include/soc/mt6358.h b/src/soc/mediatek/mt8183/include/soc/mt6358.h
index bb5f019433..6ed654ccfd 100644
--- a/src/soc/mediatek/mt8183/include/soc/mt6358.h
+++ b/src/soc/mediatek/mt8183/include/soc/mt6358.h
@@ -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__ */
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 */