[S] Change in coreboot[master]: soc/mediatek: Add support for regulator VIO18

[cong yang (Code Review)]

cong yang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/74341 )

Change subject: soc/mediatek: Add support for regulator VIO18
......................................................................

soc/mediatek: Add support for regulator VIO18

To provide power to MIPI panel STA_HIMAX83102_J02,
add support for regulator VIO18.

BUG=b:272425116
TEST=test firmware display pass for
STA_HIMAX83102_J02 on Starmie.

Change-Id: I3c3aa105e648b87fc39f881d762002f67b4422b5
Signed-off-by: Cong Yang 
---
M src/soc/mediatek/common/include/soc/regulator.h
M src/soc/mediatek/mt8186/include/soc/mt6366.h
M src/soc/mediatek/mt8186/mt6366.c
3 files changed, 36 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/41/74341/1

diff --git a/src/soc/mediatek/common/include/soc/regulator.h b/src/soc/mediatek/common/include/soc/regulator.h
index e2b9251..3cec8f0 100644
--- a/src/soc/mediatek/common/include/soc/regulator.h
+++ b/src/soc/mediatek/common/include/soc/regulator.h
@@ -23,6 +23,7 @@
    MTK_REGULATOR_VRF12,
    MTK_REGULATOR_VCN33,
    MTK_REGULATOR_VDD18,
+	MTK_REGULATOR_VIO18,
    MTK_REGULATOR_NUM,
 };

diff --git a/src/soc/mediatek/mt8186/include/soc/mt6366.h b/src/soc/mediatek/mt8186/include/soc/mt6366.h
index 2315a24..b64cd8a 100644
--- a/src/soc/mediatek/mt8186/include/soc/mt6366.h
+++ b/src/soc/mediatek/mt8186/include/soc/mt6366.h
@@ -39,6 +39,7 @@
    PMIC_VDRAM1_DBG0		= 0x161e,
    PMIC_VDRAM1_VOSEL		= 0x1626,
    PMIC_SMPS_ANA_CON0		= 0x1808,
+	PMIC_LDO_VIO18_CON0		= 0x1aec,
    PMIC_VDDQ_OP_EN			= 0x1b16,
    PMIC_VSRAM_PROC12_OP_EN		= 0x1b90,
    PMIC_VSRAM_PROC12_DBG0		= 0x1ba2,
@@ -67,6 +68,7 @@
    MT6366_VSRAM_PROC12,
    MT6366_VRF12,
    MT6366_VCN33,
+	MT6366_VIO18,
    MT6366_REGULATOR_NUM,
 };

diff --git a/src/soc/mediatek/mt8186/mt6366.c b/src/soc/mediatek/mt8186/mt6366.c
index 7ef8c24..04f0444 100644
--- a/src/soc/mediatek/mt8186/mt6366.c
+++ b/src/soc/mediatek/mt8186/mt6366.c
@@ -787,6 +787,16 @@
    pwrap_write_field(PMIC_LDO_VCN33_CON0_0, 1, 0x1, 0);
 }

+static u32 pmic_get_vio18_vol(void)
+{
+	return pwrap_read_field(PMIC_LDO_VIO18_CON0, 0x1, 0) ? 1800000 : 0;
+}
+
+static void pmic_enable_vio18(void)
+{
+	pwrap_write_field(PMIC_LDO_VIO18_CON0, 1, 0x1, 0);
+}
+
 static void pmic_wdt_set(void)
 {
    /* [5]=1, RG_WDTRSTB_DEB */
@@ -914,6 +924,9 @@
    case MT6366_VCN33:
    	pmic_set_vcn33_vol(voltage_uv);
    	break;
+	case MT6366_VIO18:
+		pmic_enable_vio18();
+		break;
    default:
    	printk(BIOS_ERR, "%s: PMIC %d is not supported\n", __func__, id);
    	break;
@@ -941,6 +954,9 @@
    	return pmic_get_vrf12_vol();
    case MT6366_VCN33:
    	return pmic_get_vcn33_vol();
+	case MT6366_VIO18:
+		return pmic_get_vio18_vol();
+		break;
    default:
    	printk(BIOS_ERR, "%s: PMIC %d is not supported\n", __func__, id);
    	break;