soc/mediatek/mt8192: add pmic MT6359P driver

MT6359P is a PMIC chipset for Mediatek MT8192 platform.
Reference datasheet: MT6359_PMIC_Data_Sheet_V1.5.docx, RH-D-2018-0205.

BUG=b:155253454
BRANCH=none
TEST=boot asurada correctly

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
Change-Id: I62f69490165539847b8b7260942644533b15285b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45399
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

4 files changed, 502 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8192/Makefile.inc b/src/soc/mediatek/mt8192/Makefile.inc
index 9c21b4da8a..e4f7063787 100644
--- a/src/soc/mediatek/mt8192/Makefile.inc
+++ b/src/soc/mediatek/mt8192/Makefile.inc
@@ -10,6 +10,7 @@ bootblock-y += ../common/timer.c
 bootblock-y += ../common/uart.c
 bootblock-y += ../common/wdt.c
 bootblock-y += pmif.c pmif_clk.c pmif_spi.c pmif_spmi.c
+bootblock-y += mt6359p.c
 
 verstage-y += flash_controller.c
 verstage-y += ../common/gpio.c gpio.c
@@ -26,6 +27,8 @@ romstage-y += memory.c dramc_param.c ../common/memory_test.c
 romstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
 romstage-y += ../common/timer.c
 romstage-y += ../common/uart.c
+romstage-y += pmif.c pmif_clk.c pmif_spi.c pmif_spmi.c
+romstage-y += mt6359p.c
 
 ramstage-y += flash_controller.c
 ramstage-y += ../common/gpio.c gpio.c
diff --git a/src/soc/mediatek/mt8192/bootblock.c b/src/soc/mediatek/mt8192/bootblock.c
index 0852f0ede8..d9cb684adf 100644
--- a/src/soc/mediatek/mt8192/bootblock.c
+++ b/src/soc/mediatek/mt8192/bootblock.c
@@ -2,6 +2,7 @@
 
 #include <bootblock_common.h>
 #include <soc/mmu_operations.h>
+#include <soc/mt6359p.h>
 #include <soc/pll.h>
 #include <soc/pmif.h>
 #include <soc/wdt.h>
@@ -12,4 +13,5 @@ void bootblock_soc_init(void)
 	mtk_wdt_init();
 	mt_pll_init();
 	mtk_pmif_init();
+	mt6359p_init();
 }
diff --git a/src/soc/mediatek/mt8192/include/soc/mt6359p.h b/src/soc/mediatek/mt8192/include/soc/mt6359p.h
new file mode 100644
index 0000000000..b90e0f55ed
--- /dev/null
+++ b/src/soc/mediatek/mt8192/include/soc/mt6359p.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __SOC_MEDIATEK_MT6359P_H__
+#define __SOC_MEDIATEK_MT6359P_H__
+
+#include <types.h>
+
+enum {
+	PMIC_HWCID		= 0x0008,
+	PMIC_SWCID		= 0x000a,
+	PMIC_TOP_RST_MISC_SET	= 0x014c,
+	PMIC_TOP_RST_MISC_CLR	= 0x014e,
+	PMIC_PWRHOLD		= 0x0a08,
+	PMIC_VGPU11_DBG0	= 0x15a6,
+	PMIC_VGPU11_ELR0	= 0x15b4,
+	PMIC_VS2_VOTER		= 0x18aa,
+	PMIC_VS2_VOTER_CFG	= 0x18b0,
+	PMIC_VS2_ELR0		= 0x18b4,
+	PMIC_VSRAM_PROC1_ELR	= 0x1b44,
+	PMIC_VSRAM_PROC2_ELR	= 0x1b46,
+	PMIC_VSRAM_PROC1_VOSEL1	= 0x1e90,
+	PMIC_VSRAM_PROC2_VOSEL1	= 0x1eb0,
+	PMIC_VM18_ANA_CON0	= 0x2020,
+};
+
+struct pmic_setting {
+	unsigned short addr;
+	unsigned short val;
+	unsigned short mask;
+	unsigned char shift;
+};
+
+enum {
+	MT6359P_GPU11 = 0,
+	MT6359P_SRAM_PROC1,
+	MT6359P_SRAM_PROC2,
+	MT6359P_MAX,
+};
+
+#define VM18_VOL_REG_SHIFT  8
+#define VM18_VOL_OFFSET 600
+
+void mt6359p_init(void);
+void mt6359p_romstage_init(void);
+void mt6359p_buck_set_voltage(u32 buck_id, u32 buck_uv);
+u32 mt6359p_buck_get_voltage(u32 buck_id);
+void mt6359p_set_vm18_voltage(u32 vm18_uv);
+u32 mt6359p_get_vm18_voltage(void);
+#endif /* __SOC_MEDIATEK_MT6359P_H__ */
diff --git a/src/soc/mediatek/mt8192/mt6359p.c b/src/soc/mediatek/mt8192/mt6359p.c
new file mode 100644
index 0000000000..1646e534e4
--- /dev/null
+++ b/src/soc/mediatek/mt8192/mt6359p.c
@@ -0,0 +1,448 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <assert.h>
+#include <console/console.h>
+#include <delay.h>
+#include <soc/pmif.h>
+#include <soc/mt6359p.h>
+
+static const struct pmic_setting init_setting[] = {
+	{0x20, 0xA, 0xA, 0},
+	{0x24, 0x1F00, 0x1F00, 0},
+	{0x30, 0x1, 0x1, 0},
+	{0x32, 0x1, 0x1, 0},
+	{0x94, 0x0, 0xFFFF, 0},
+	{0x10C, 0x10, 0x10, 0},
+	{0x112, 0x4, 0x4, 0},
+	{0x118, 0x8, 0x8, 0},
+	{0x14A, 0x20, 0x20, 0},
+	{0x198, 0x0, 0x1FF, 0},
+	{0x1B2, 0x3, 0x3, 0},
+	{0x3B0, 0x0, 0x300, 0},
+	{0x790, 0x3, 0x3, 0},
+	{0x7A6, 0xF800, 0xFC00, 0},
+	{0x7A8, 0x0, 0x280, 0},
+	{0x98A, 0x80, 0x80, 0},
+	{0x992, 0xF00, 0xF00, 0},
+	{0xA08, 0x1, 0x1, 0},
+	{0xA0C, 0x300, 0x300, 0},
+	{0xA10, 0x0, 0x4000, 0},
+	{0xA12, 0x1E0, 0x1E0, 0},
+	{0xA24, 0xFFFF, 0xFFFF, 0},
+	{0xA26, 0xFFE0, 0xFFE0, 0},
+	{0xA2C, 0xC0DF, 0xC0DF, 0},
+	{0xA2E, 0xEBE0, 0xEBE0, 0},
+	{0xA34, 0x8000, 0x8000, 0},
+	{0xA3C, 0x1C00, 0x1F00, 0},
+	{0xA3E, 0x341, 0x7FFF, 0},
+	{0xA40, 0x1042, 0x7FFF, 0},
+	{0xA42, 0xC05, 0x7FFF, 0},
+	{0xA44, 0x20E5, 0x7FFF, 0},
+	{0xA46, 0x2652, 0x7FFF, 0},
+	{0xA48, 0x716A, 0x7FFF, 0},
+	{0xA4A, 0x62EC, 0x7FFF, 0},
+	{0xA4C, 0x5676, 0x7FFF, 0},
+	{0xA4E, 0x6F34, 0x7FFF, 0},
+	{0xA50, 0xC0, 0x7FFF, 0},
+	{0xA9C, 0x4000, 0x4000, 0},
+	{0xA9E, 0x2E11, 0xFF11, 0},
+	{0xF8C, 0x115, 0x115, 0},
+	{0x1188, 0x0, 0x8000, 0},
+	{0x1198, 0x13, 0x3FF, 0},
+	{0x119E, 0x6000, 0x7000, 0},
+	{0x11D4, 0x0, 0x2, 0},
+	{0x1212, 0x0, 0x2, 0},
+	{0x1224, 0x0, 0x2, 0},
+	{0x1238, 0x0, 0x2, 0},
+	{0x124A, 0x0, 0x2, 0},
+	{0x125C, 0x0, 0x2, 0},
+	{0x125E, 0x0, 0x8000, 0},
+	{0x1260, 0x1, 0xFFF, 0},
+	{0x1262, 0x4, 0x4, 0},
+	{0x1412, 0x8, 0x8, 0},
+	{0x148E, 0x18, 0x7F, 0},
+	{0x1492, 0x505, 0x7F7F, 0},
+	{0x1514, 0x2, 0x2, 0},
+	{0x1520, 0x0, 0x2, 0},
+	{0x152C, 0x7F, 0x7F, 0},
+	{0x158E, 0x18, 0x7F, 0},
+	{0x1592, 0xC00, 0x7F00, 0},
+	{0x160E, 0x18, 0x7F, 0},
+	{0x1694, 0x2, 0x2, 0},
+	{0x16A0, 0x0, 0x2, 0},
+	{0x16AE, 0x50, 0x7F, 0},
+	{0x170E, 0x18, 0x7F, 0},
+	{0x178E, 0x18, 0x7F, 0},
+	{0x198A, 0x5004, 0x502C, 0},
+	{0x198C, 0x11, 0x3F, 0},
+	{0x198E, 0x1E0, 0x1E0, 0},
+	{0x1990, 0xFD, 0xFF, 0},
+	{0x1994, 0x10, 0x38, 0},
+	{0x1996, 0x2004, 0xA02C, 0},
+	{0x1998, 0x11, 0x3F, 0},
+	{0x199A, 0xFB78, 0xFF78, 0},
+	{0x199E, 0x2, 0x7, 0},
+	{0x19A0, 0x1050, 0x10F1, 0},
+	{0x19A2, 0x18, 0x38, 0},
+	{0x19A4, 0xF, 0xF, 0},
+	{0x19A6, 0x30, 0xFF, 0},
+	{0x19AC, 0x4200, 0x4680, 0},
+	{0x19AE, 0x6E, 0x7E, 0},
+	{0x19B0, 0x3C00, 0x3C00, 0},
+	{0x19B4, 0x20FD, 0xFFFF, 0},
+	{0x1A08, 0x4200, 0x4680, 0},
+	{0x1A0A, 0x6E, 0x7E, 0},
+	{0x1A0C, 0x3C00, 0x3C00, 0},
+	{0x1A10, 0x20FD, 0xFFFF, 0},
+	{0x1A14, 0x4208, 0x4698, 0},
+	{0x1A16, 0x46, 0x7E, 0},
+	{0x1A18, 0x3C00, 0x3C00, 0},
+	{0x1A1C, 0x30FF, 0xFFFF, 0},
+	{0x1A1E, 0x0, 0x200, 0},
+	{0x1A20, 0x4208, 0x4698, 0},
+	{0x1A22, 0x4A, 0x7E, 0},
+	{0x1A24, 0x3C00, 0x3C00, 0},
+	{0x1A28, 0x3000, 0xFF00, 0},
+	{0x1A2C, 0x20, 0x74, 0},
+	{0x1A2E, 0x1E, 0x1E, 0},
+	{0x1A30, 0x42, 0xFF, 0},
+	{0x1A32, 0x480, 0x7E0, 0},
+	{0x1A34, 0x20, 0x74, 0},
+	{0x1A36, 0x1E, 0x1E, 0},
+	{0x1A38, 0x42, 0xFF, 0},
+	{0x1A3A, 0x480, 0x7E0, 0},
+	{0x1A3C, 0x14C, 0x3CC, 0},
+	{0x1A3E, 0x23C, 0x3FC, 0},
+	{0x1A40, 0xC400, 0xFF00, 0},
+	{0x1A42, 0x80, 0xFF, 0},
+	{0x1A44, 0x702C, 0xFF2C, 0},
+	{0x1B0E, 0xF, 0xF, 0},
+	{0x1B10, 0x1, 0x1, 0},
+	{0x1B14, 0xFFFF, 0xFFFF, 0},
+	{0x1B1A, 0x3FFF, 0x3FFF, 0},
+	{0x1B32, 0x8, 0x8, 0},
+	{0x1B8A, 0x30, 0x8030, 0},
+	{0x1B9C, 0x10, 0x8010, 0},
+	{0x1BA0, 0x4000, 0x4000, 0},
+	{0x1BAE, 0x1410, 0x9C10, 0},
+	{0x1BB2, 0x2, 0x2, 0},
+	{0x1BC0, 0x10, 0x8010, 0},
+	{0x1BD2, 0x13, 0x8013, 0},
+	{0x1BE4, 0x10, 0x8010, 0},
+	{0x1C0A, 0x10, 0x8010, 0},
+	{0x1C1E, 0x10, 0x8010, 0},
+	{0x1C30, 0x10, 0x8010, 0},
+	{0x1C42, 0x10, 0x8010, 0},
+	{0x1C54, 0x32, 0x8033, 0},
+	{0x1C66, 0x10, 0x8010, 0},
+	{0x1C8A, 0x10, 0x8010, 0},
+	{0x1C8E, 0x4000, 0x4000, 0},
+	{0x1C9C, 0x10, 0x8010, 0},
+	{0x1CAE, 0x10, 0x8010, 0},
+	{0x1CC0, 0x10, 0x8010, 0},
+	{0x1CD2, 0x33, 0x8033, 0},
+	{0x1CE4, 0x33, 0x8033, 0},
+	{0x1D0A, 0x10, 0x8010, 0},
+	{0x1D1E, 0x10, 0x8010, 0},
+	{0x1D22, 0x4000, 0x4000, 0},
+	{0x1D30, 0x10, 0x8010, 0},
+	{0x1D34, 0x4000, 0x4000, 0},
+	{0x1D42, 0x30, 0x8030, 0},
+	{0x1D46, 0x4000, 0x4000, 0},
+	{0x1D54, 0x30, 0x8030, 0},
+	{0x1D66, 0x32, 0x8033, 0},
+	{0x1D8A, 0x10, 0x8010, 0},
+	{0x1D9C, 0x10, 0x8010, 0},
+	{0x1E8A, 0x10, 0x8010, 0},
+	{0x1E92, 0xC12, 0x7F7F, 0},
+	{0x1EAA, 0x10, 0x8010, 0},
+	{0x1EB2, 0xC1F, 0x7F7F, 0},
+	{0x1F0A, 0x10, 0x8010, 0},
+	{0x1F12, 0xC1F, 0x7F7F, 0},
+	{0x1F30, 0x10, 0x8010, 0},
+	{0x1F38, 0xF1F, 0x7F7F, 0},
+	{0x200A, 0x8, 0xC, 0},
+	{0x202C, 0x8, 0xC, 0},
+	{0x208C, 0x100, 0xF00, 0},
+	{0x209C, 0x80, 0x1E0, 0},
+};
+
+static const struct pmic_setting lp_setting[] = {
+	/* Suspend */
+	{0x1520, 0x0, 0x1, 0x1},
+	{0x1514, 0x1, 0x1, 0x1},
+	{0x151a, 0x0, 0x1, 0x1},
+	{0x14a0, 0x1, 0x1, 0x1},
+	{0x1494, 0x1, 0x1, 0x1},
+	{0x149a, 0x1, 0x1, 0x1},
+	{0x1714, 0x1, 0x1, 0xf},
+	{0x1794, 0x1, 0x1, 0xf},
+	{0x15a0, 0x1, 0x1, 0x0},
+	{0x1594, 0x1, 0x1, 0x0},
+	{0x159a, 0x1, 0x1, 0x0},
+	{0x1614, 0x1, 0x1, 0xf},
+	{0x16a0, 0x0, 0x1, 0x1},
+	{0x1694, 0x1, 0x1, 0x1},
+	{0x169a, 0x0, 0x1, 0x1},
+	{0x1820, 0x1, 0x1, 0x0},
+	{0x1814, 0x1, 0x1, 0x0},
+	{0x181a, 0x1, 0x1, 0x0},
+	{0x18a0, 0x1, 0x1, 0x0},
+	{0x1894, 0x1, 0x1, 0x0},
+	{0x189a, 0x1, 0x1, 0x0},
+	{0x1e96, 0x1, 0x1, 0xf},
+	{0x1eb6, 0x1, 0x1, 0xf},
+	{0x1f16, 0x1, 0x1, 0xf},
+	{0x1f3c, 0x1, 0x1, 0xf},
+	{0x1c58, 0x1, 0x1, 0xf},
+	{0x1d8e, 0x1, 0x1, 0xf},
+	{0x1c34, 0x1, 0x1, 0xf},
+	{0x1c22, 0x1, 0x1, 0xf},
+	{0x1bae, 0x0, 0x1, 0xb},
+	{0x1bb2, 0x1, 0x1, 0x1},
+	{0x1bb8, 0x0, 0x1, 0x1},
+	{0x1cb2, 0x1, 0x1, 0xf},
+	{0x1bd6, 0x1, 0x1, 0xf},
+	{0x1bc0, 0x1, 0x1, 0xa},
+	{0x1bc4, 0x1, 0x1, 0x0},
+	{0x1bca, 0x1, 0x1, 0x0},
+	{0x1d22, 0x1, 0x1, 0xe},
+	{0x1d28, 0x0, 0x1, 0xe},
+	{0x1c66, 0x1, 0x1, 0xa},
+	{0x1c6a, 0x1, 0x1, 0x0},
+	{0x1c70, 0x1, 0x1, 0x0},
+	{0x1c42, 0x1, 0x1, 0xb},
+	{0x1c46, 0x1, 0x1, 0x1},
+	{0x1c4c, 0x1, 0x1, 0x1},
+	{0x1d34, 0x1, 0x1, 0xe},
+	{0x1d3a, 0x0, 0x1, 0xe},
+	{0x1b8a, 0x0, 0x1, 0xb},
+	{0x1b8e, 0x1, 0x1, 0x1},
+	{0x1b94, 0x0, 0x1, 0x1},
+	{0x1d42, 0x1, 0x1, 0xa},
+	{0x1d46, 0x1, 0x1, 0x0},
+	{0x1d4c, 0x0, 0x1, 0x0},
+	{0x1ca0, 0x1, 0x1, 0xf},
+	{0x1c8a, 0x1, 0x1, 0xa},
+	{0x1c8e, 0x1, 0x1, 0x0},
+	{0x1c94, 0x1, 0x1, 0x0},
+	{0x1b9c, 0x1, 0x1, 0xa},
+	{0x1ba0, 0x1, 0x1, 0x0},
+	{0x1ba6, 0x1, 0x1, 0x0},
+	{0x1be8, 0x1, 0x1, 0xf},
+	{0x1c0e, 0x1, 0x1, 0xf},
+	{0x1d0a, 0x1, 0x1, 0xa},
+	{0x1d0e, 0x1, 0x1, 0x0},
+	{0x1d14, 0x1, 0x1, 0x0},
+	{0x1cc4, 0x1, 0x1, 0xf},
+	{0x1d6a, 0x1, 0x1, 0xf},
+	{0x1cd6, 0x1, 0x1, 0xf},
+	{0x1ce8, 0x1, 0x1, 0xf},
+	{0x1da0, 0x1, 0x1, 0xf},
+	{0x1d58, 0x1, 0x1, 0xf},
+
+	/* Deepidle */
+	{0x15a0, 0x1, 0x1, 0x2},
+	{0x1594, 0x1, 0x1, 0x2},
+	{0x159a, 0x1, 0x1, 0x2},
+	{0x1820, 0x1, 0x1, 0x2},
+	{0x1814, 0x1, 0x1, 0x2},
+	{0x181a, 0x1, 0x1, 0x2},
+	{0x18a0, 0x1, 0x1, 0x2},
+	{0x1894, 0x1, 0x1, 0x2},
+	{0x189a, 0x1, 0x1, 0x2},
+	{0x1bc0, 0x1, 0x1, 0xc},
+	{0x1bc4, 0x1, 0x1, 0x2},
+	{0x1bca, 0x1, 0x1, 0x2},
+	{0x1c66, 0x1, 0x1, 0xc},
+	{0x1c6a, 0x1, 0x1, 0x2},
+	{0x1c70, 0x1, 0x1, 0x2},
+	{0x1d42, 0x1, 0x1, 0xc},
+	{0x1d46, 0x1, 0x1, 0x2},
+	{0x1d4c, 0x0, 0x1, 0x2},
+	{0x1c8a, 0x1, 0x1, 0xc},
+	{0x1c8e, 0x1, 0x1, 0x2},
+	{0x1c94, 0x1, 0x1, 0x2},
+	{0x1b9c, 0x1, 0x1, 0xc},
+	{0x1ba0, 0x1, 0x1, 0x2},
+	{0x1ba6, 0x1, 0x1, 0x2},
+	{0x1be8, 0x1, 0x1, 0xf},
+	{0x1c0e, 0x1, 0x1, 0xf},
+	{0x1d0a, 0x1, 0x1, 0xc},
+	{0x1d0e, 0x1, 0x1, 0x2},
+	{0x1d14, 0x1, 0x1, 0x2},
+	{0x1d0e, 0x1, 0x1, 0x2},
+	{0x1d14, 0x1, 0x1, 0x2},
+};
+
+static struct pmif *pmif_arb = NULL;
+static void mt6359p_write(u32 reg, u32 data)
+{
+	pmif_arb->write(pmif_arb, 0, reg, data);
+}
+
+static u32 mt6359p_read_field(u32 reg, u32 mask, u32 shift)
+{
+	return pmif_arb->read_field(pmif_arb, 0, reg, mask, shift);
+}
+
+static void mt6359p_write_field(u32 reg, u32 val, u32 mask, u32 shift)
+{
+	pmif_arb->write_field(pmif_arb, 0, reg, val, mask, shift);
+}
+
+static void pmic_set_power_hold(void)
+{
+	mt6359p_write_field(PMIC_PWRHOLD, 0x1, 0x1, 0);
+}
+
+static void pmic_wdt_set(void)
+{
+	/* [5]=1, RG_WDTRSTB_DEB */
+	mt6359p_write_field(PMIC_TOP_RST_MISC_SET, 0x20, 0xFFFF, 0);
+	/* [1]=0, RG_WDTRSTB_MODE */
+	mt6359p_write_field(PMIC_TOP_RST_MISC_CLR, 0x02, 0xFFFF, 0);
+	/* [0]=1, RG_WDTRSTB_EN */
+	mt6359p_write_field(PMIC_TOP_RST_MISC_SET, 0x01, 0xFFFF, 0);
+}
+
+static void pmic_init_setting(void)
+{
+	for (int i = 0; i < ARRAY_SIZE(init_setting); i++)
+		mt6359p_write_field(init_setting[i].addr, init_setting[i].val,
+			init_setting[i].mask, init_setting[i].shift);
+}
+
+static void pmic_lp_setting(void)
+{
+	for (int i = 0; i < ARRAY_SIZE(lp_setting); i++)
+		mt6359p_write_field(lp_setting[i].addr, lp_setting[i].val,
+			lp_setting[i].mask, lp_setting[i].shift);
+}
+
+static void pmic_wk_vs2_voter_setting(void)
+{
+	/*
+	 *  1. Set VS2_VOTER_VOSEL = 1.35V
+	 *  2. Clear VS2_VOTER
+	 *  3. Set VS2_VOSEL = 1.4V
+	 */
+	mt6359p_write_field(PMIC_VS2_VOTER_CFG, 0x2C, 0x7F, 0);
+	mt6359p_write_field(PMIC_VS2_VOTER, 0, 0xFFF, 0);
+	mt6359p_write_field(PMIC_VS2_ELR0, 0x30, 0x7F, 0);
+}
+
+void mt6359p_buck_set_voltage(u32 buck_id, u32 buck_uv)
+{
+	u32 vol_offset, vol_reg, vol;
+
+	if (!pmif_arb)
+		die("ERROR: pmif_arb not initialized");
+
+	switch (buck_id) {
+	case MT6359P_GPU11:
+		vol_offset = 400000;
+		vol_reg = PMIC_VGPU11_ELR0;
+		break;
+	case MT6359P_SRAM_PROC1:
+		vol_offset = 500000;
+		vol_reg = PMIC_VSRAM_PROC1_ELR;
+		break;
+	case MT6359P_SRAM_PROC2:
+		vol_offset = 500000;
+		vol_reg = PMIC_VSRAM_PROC2_ELR;
+		break;
+	default:
+		die("ERROR: Unknown buck_id %u", buck_id);
+		return;
+	};
+
+	vol = (buck_uv - vol_offset) / 6250;
+	mt6359p_write_field(vol_reg, vol, 0x7F, 0);
+}
+
+u32 mt6359p_buck_get_voltage(u32 buck_id)
+{
+	u32 vol_shift, vol_offset, vol_reg, vol;
+
+	if (!pmif_arb)
+		die("ERROR: pmif_arb not initialized");
+
+	switch (buck_id) {
+	case MT6359P_GPU11:
+		vol_shift = 0;
+		vol_offset = 400000;
+		vol_reg = PMIC_VGPU11_DBG0;
+		break;
+	case MT6359P_SRAM_PROC1:
+		vol_shift = 8;
+		vol_offset = 500000;
+		vol_reg = PMIC_VSRAM_PROC1_VOSEL1;
+		break;
+	case MT6359P_SRAM_PROC2:
+		vol_shift = 8;
+		vol_offset = 500000;
+		vol_reg = PMIC_VSRAM_PROC2_VOSEL1;
+		break;
+	default:
+		die("ERROR: Unknown buck_id %u", buck_id);
+		return 0;
+	};
+
+	vol = mt6359p_read_field(vol_reg, 0x7F, vol_shift);
+	return vol_offset + vol * 6250;
+}
+
+void mt6359p_set_vm18_voltage(u32 vm18_uv)
+{
+	u32 reg_vol, reg_cali;
+
+	if (!pmif_arb)
+		die("ERROR: pmif_arb not initialized");
+
+	assert(vm18_uv >= 1700000);
+	assert(vm18_uv < 2000000);
+
+	reg_vol = (vm18_uv / 1000 - VM18_VOL_OFFSET) / 100;
+	reg_cali = ((vm18_uv / 1000) % 100) / 10;
+	mt6359p_write(PMIC_VM18_ANA_CON0, (reg_vol << VM18_VOL_REG_SHIFT) | reg_cali);
+}
+
+u32 mt6359p_get_vm18_voltage(void)
+{
+	u32 reg_vol, reg_cali;
+
+	if (!pmif_arb)
+		die("ERROR: pmif_arb not initialized");
+
+	reg_vol = 100 * mt6359p_read_field(PMIC_VM18_ANA_CON0, 0xF, VM18_VOL_REG_SHIFT);
+	reg_cali = 10 * mt6359p_read_field(PMIC_VM18_ANA_CON0, 0xF, 0);
+	return 600 + reg_vol + reg_cali;
+}
+
+static void init_pmif_arb(void)
+{
+	if (!pmif_arb) {
+		pmif_arb = get_pmif_controller(PMIF_SPI, 0);
+		if (!pmif_arb)
+			die("ERROR: No spi device");
+	}
+
+	if (pmif_arb->is_pmif_init_done(pmif_arb))
+		die("ERROR - Failed to initialize pmif spi");
+}
+
+void mt6359p_init(void)
+{
+	init_pmif_arb();
+	pmic_set_power_hold();
+	pmic_wdt_set();
+	pmic_init_setting();
+	pmic_lp_setting();
+	pmic_wk_vs2_voter_setting();
+}
+
+void mt6359p_romstage_init(void)
+{
+	init_pmif_arb();
+}