mb/google/corsola: Implement regulator interface

Use regulator interface to use regulator more easily.

TEST=build pass
BUG=b:202871018

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: Ied43cba51036c62a120df2afffeb63b5d73f012b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59250
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/mainboard/google/corsola/Makefile.inc

@@ -8,9 +8,11 @@ verstage-y += reset.c
 
 romstage-y += memlayout.ld
 romstage-y += chromeos.c
+romstage-y += regulator.c
 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/corsola/regulator.c

@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <assert.h>
+#include <console/console.h>
+#include <soc/mt6366.h>
+#include <soc/regulator.h>
+
+#define REGULATOR_NOT_SUPPORT -1
+
+static const int regulator_id[] = {
+	[MTK_REGULATOR_VDD1] = REGULATOR_NOT_SUPPORT,
+	[MTK_REGULATOR_VDD2] = REGULATOR_NOT_SUPPORT,
+	[MTK_REGULATOR_VDDQ] = MT6366_VDDQ,
+	[MTK_REGULATOR_VMDDR] = REGULATOR_NOT_SUPPORT,
+	[MTK_REGULATOR_VCORE] = MT6366_VCORE,
+	[MTK_REGULATOR_VCC] = REGULATOR_NOT_SUPPORT,
+	[MTK_REGULATOR_VCCQ] = REGULATOR_NOT_SUPPORT,
+	[MTK_REGULATOR_VDRAM1] = MT6366_VDRAM1,
+};
+
+_Static_assert(ARRAY_SIZE(regulator_id) == MTK_REGULATOR_NUM, "regulator_id size error");
+
+void mainboard_set_regulator_vol(enum mtk_regulator regulator,
+				 uint32_t voltage_uv)
+{
+	assert(regulator < MTK_REGULATOR_NUM);
+
+	if (regulator_id[regulator] < 0) {
+		printk(BIOS_ERR, "Invalid regulator ID: %d\n", regulator);
+		return;
+	}
+	mt6366_set_voltage(regulator_id[regulator], voltage_uv);
+}
+
+uint32_t mainboard_get_regulator_vol(enum mtk_regulator regulator)
+{
+	assert(regulator < MTK_REGULATOR_NUM);
+
+	if (regulator_id[regulator] < 0) {
+		printk(BIOS_ERR, "Invalid regulator ID: %d\n", regulator);
+		return 0;
+	}
+	return mt6366_get_voltage(regulator_id[regulator]);
+}

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

@@ -13,12 +13,13 @@ enum mtk_regulator {
 	MTK_REGULATOR_VCORE,
 	MTK_REGULATOR_VCC,
 	MTK_REGULATOR_VCCQ,
+	MTK_REGULATOR_VDRAM1,
+	MTK_REGULATOR_NUM,
 };
 
 void mainboard_set_regulator_vol(enum mtk_regulator regulator,
 				 uint32_t voltage_uv);
 uint32_t mainboard_get_regulator_vol(enum mtk_regulator regulator);
-
 int mainboard_enable_regulator(enum mtk_regulator regulator, uint8_t enable);
 uint8_t mainboard_regulator_is_enabled(enum mtk_regulator regulator);