mb/google/geralt: Implement regulator interface

Control regulator more easily with regulator interface.

TEST=measure 3.0V in VMCH and VMC.
BUG=b:236331724

Signed-off-by: Hui Liu <hui.liu@mediatek.corp-partner.google.com>
Change-Id: I9727475774b3b9a8dcd49e5e60e133f9d745b407
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65875
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/geralt/Makefile.inc

@@ -13,4 +13,5 @@ romstage-y += romstage.c
 ramstage-y += memlayout.ld
 ramstage-y += chromeos.c
 ramstage-y += mainboard.c
+ramstage-y += regulator.c
 ramstage-y += reset.c

src/mainboard/google/geralt/regulator.c

@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <soc/mt6359p.h>
+#include <soc/regulator.h>
+
+#define MTK_REGULATOR_INVALID -1
+
+static int get_mt6359p_regulator_id(enum mtk_regulator regulator)
+{
+	switch (regulator) {
+	case MTK_REGULATOR_VCORE:
+		return MT6359P_GPU11;
+	case MTK_REGULATOR_VPROC11:
+		return MT6359P_CORE;
+	case MTK_REGULATOR_VSRAM_PROC11:
+		return MT6359P_SRAM_PROC1;
+	case MTK_REGULATOR_VMCH:
+		return MT6359P_PA;
+	case MTK_REGULATOR_VMC:
+		return MT6359P_SIM1;
+	default:
+		return MTK_REGULATOR_INVALID;
+	}
+}
+
+void mainboard_set_regulator_voltage(enum mtk_regulator regulator, uint32_t voltage_uv)
+{
+	int id;
+
+	id = get_mt6359p_regulator_id(regulator);
+	if (id < 0) {
+		printk(BIOS_ERR, "Invalid regulator ID: %d\n", regulator);
+		return;
+	}
+
+	if (id == MT6359P_SIM1)
+		mt6359p_set_vsim1_voltage(voltage_uv);
+	else
+		mt6359p_buck_set_voltage(id, voltage_uv);
+}
+
+uint32_t mainboard_get_regulator_voltage(enum mtk_regulator regulator)
+{
+	int id;
+
+	id = get_mt6359p_regulator_id(regulator);
+	if (id < 0) {
+		printk(BIOS_ERR, "Invalid regulator ID: %d\n", regulator);
+		return 0;
+	}
+
+	if (id == MT6359P_SIM1)
+		return mt6359p_get_vsim1_voltage();
+
+	return mt6359p_buck_get_voltage(id);
+}
+
+int mainboard_enable_regulator(enum mtk_regulator regulator, bool enable)
+{
+	int id;
+
+	id = get_mt6359p_regulator_id(regulator);
+	if (id < 0) {
+		printk(BIOS_ERR, "Invalid regulator ID: %d\n", regulator);
+		return -1;
+	}
+
+	if (id == MT6359P_SIM1)
+		mt6359p_enable_vsim1(enable);
+	else if (id == MT6359P_PA)
+		mt6359p_enable_vpa(enable);
+	else
+		printk(BIOS_INFO, "No need to enable regulator ID: %d\n", regulator);
+
+	return 0;
+}

src/soc/mediatek/common/include/soc/regulator.h

@@ -16,7 +16,9 @@ enum mtk_regulator {
 	MTK_REGULATOR_VDRAM1,
 	MTK_REGULATOR_VMCH,
 	MTK_REGULATOR_VMC,
+	MTK_REGULATOR_VPROC11,
 	MTK_REGULATOR_VPROC12,
+	MTK_REGULATOR_VSRAM_PROC11,
 	MTK_REGULATOR_VSRAM_PROC12,
 	MTK_REGULATOR_VRF12,
 	MTK_REGULATOR_VCN33,