clk: MediaTek: add clock driver for MT7629 SoC.

This patch adds clock modules for MediaTek SoCs:
- Shared part: a common driver which contains the general operations
for plls, muxes, dividers and gates so that we can reuse it in future.

- Specific SoC part: the group of structures used to hold the hardware
configuration for each SoC.

We take MT7629 as an example to demonstrate how to implement driver if
any other MediaTek chips would like to use it.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

5 files changed, 1403 insertions, 0 deletions

diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 821b5867e87..c128538303f 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -10,6 +10,7 @@ obj-y += imx/
 obj-y += tegra/
 obj-$(CONFIG_ARCH_ASPEED) += aspeed/
 obj-$(CONFIG_ARCH_MESON) += clk_meson.o
+obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/
 obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/
 obj-$(CONFIG_ARCH_SOCFPGA) += altera/
 obj-$(CONFIG_CLK_AT91) += at91/
diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
new file mode 100644
index 00000000000..297f99d3838
--- /dev/null
+++ b/drivers/clk/mediatek/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+# Core
+obj-$(CONFIG_ARCH_MEDIATEK) += clk-mtk.o
+
+# SoC Drivers
+obj-$(CONFIG_TARGET_MT7629) += clk-mt7629.o
diff --git a/drivers/clk/mediatek/clk-mt7629.c b/drivers/clk/mediatek/clk-mt7629.c
new file mode 100644
index 00000000000..2601b6cf30d
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt7629.c
@@ -0,0 +1,709 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek clock driver for MT7629 SoC
+ *
+ * Copyright (C) 2018 MediaTek Inc.
+ * Author: Ryder Lee <ryder.lee@mediatek.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/io.h>
+#include <dt-bindings/clock/mt7629-clk.h>
+
+#include "clk-mtk.h"
+
+#define MT7629_CLKSQ_STB_CON0		0x20
+#define MT7629_PLL_ISO_CON0		0x2c
+#define MT7629_PLL_FMAX			(2500UL * MHZ)
+#define MT7629_CON0_RST_BAR		BIT(24)
+
+#define MCU_AXI_DIV			0x640
+#define AXI_DIV_MSK			GENMASK(4, 0)
+#define AXI_DIV_SEL(x)			(x)
+
+#define MCU_BUS_MUX			0x7c0
+#define MCU_BUS_MSK			GENMASK(10, 9)
+#define MCU_BUS_SEL(x)			((x) << 9)
+
+/* apmixedsys */
+#define PLL(_id, _reg, _pwr_reg, _en_mask, _flags, _pcwbits, _pd_reg,	\
+	    _pd_shift, _pcw_reg, _pcw_shift) {				\
+		.id = _id,						\
+		.reg = _reg,						\
+		.pwr_reg = _pwr_reg,					\
+		.en_mask = _en_mask,					\
+		.rst_bar_mask = MT7629_CON0_RST_BAR,			\
+		.fmax = MT7629_PLL_FMAX,				\
+		.flags = _flags,					\
+		.pcwbits = _pcwbits,					\
+		.pd_reg = _pd_reg,					\
+		.pd_shift = _pd_shift,					\
+		.pcw_reg = _pcw_reg,					\
+		.pcw_shift = _pcw_shift,				\
+	}
+
+static const struct mtk_pll_data apmixed_plls[] = {
+	PLL(CLK_APMIXED_ARMPLL, 0x200, 0x20c, 0x1, 0,
+	    21, 0x204, 24, 0x204, 0),
+	PLL(CLK_APMIXED_MAINPLL, 0x210, 0x21c, 0x1, HAVE_RST_BAR,
+	    21, 0x214, 24, 0x214, 0),
+	PLL(CLK_APMIXED_UNIV2PLL, 0x220, 0x22c, 0x1, HAVE_RST_BAR,
+	    7, 0x224, 24, 0x224, 14),
+	PLL(CLK_APMIXED_ETH1PLL, 0x300, 0x310, 0x1, 0,
+	    21, 0x300, 1, 0x304, 0),
+	PLL(CLK_APMIXED_ETH2PLL, 0x314, 0x320, 0x1, 0,
+	    21, 0x314, 1, 0x318, 0),
+	PLL(CLK_APMIXED_SGMIPLL, 0x358, 0x368, 0x1, 0,
+	    21, 0x358, 1, 0x35c, 0),
+};
+
+/* topckgen */
+#define FACTOR0(_id, _parent, _mult, _div)			\
+	FACTOR(_id, _parent, _mult, _div, CLK_PARENT_APMIXED)
+
+#define FACTOR1(_id, _parent, _mult, _div)			\
+	FACTOR(_id, _parent, _mult, _div, CLK_PARENT_TOPCKGEN)
+
+#define FACTOR2(_id, _parent, _mult, _div)			\
+	FACTOR(_id, _parent, _mult, _div, 0)
+
+static const struct mtk_fixed_clk top_fixed_clks[] = {
+	FIXED_CLK(CLK_TOP_TO_U2_PHY, CLK_XTAL, 31250000),
+	FIXED_CLK(CLK_TOP_TO_U2_PHY_1P, CLK_XTAL, 31250000),
+	FIXED_CLK(CLK_TOP_PCIE0_PIPE_EN, CLK_XTAL, 125000000),
+	FIXED_CLK(CLK_TOP_PCIE1_PIPE_EN, CLK_XTAL, 125000000),
+	FIXED_CLK(CLK_TOP_SSUSB_TX250M, CLK_XTAL, 250000000),
+	FIXED_CLK(CLK_TOP_SSUSB_EQ_RX250M, CLK_XTAL, 250000000),
+	FIXED_CLK(CLK_TOP_SSUSB_CDR_REF, CLK_XTAL, 33333333),
+	FIXED_CLK(CLK_TOP_SSUSB_CDR_FB, CLK_XTAL, 50000000),
+	FIXED_CLK(CLK_TOP_SATA_ASIC, CLK_XTAL, 50000000),
+	FIXED_CLK(CLK_TOP_SATA_RBC, CLK_XTAL, 50000000),
+};
+
+static const struct mtk_fixed_factor top_fixed_divs[] = {
+	FACTOR0(CLK_TOP_TO_USB3_SYS, CLK_APMIXED_ETH1PLL, 1, 4),
+	FACTOR0(CLK_TOP_P1_1MHZ, CLK_APMIXED_ETH1PLL, 1, 500),
+	FACTOR0(CLK_TOP_4MHZ, CLK_APMIXED_ETH1PLL, 1, 125),
+	FACTOR0(CLK_TOP_P0_1MHZ, CLK_APMIXED_ETH1PLL, 1, 500),
+	FACTOR0(CLK_TOP_ETH_500M, CLK_APMIXED_ETH1PLL, 1, 1),
+	FACTOR1(CLK_TOP_TXCLK_SRC_PRE, CLK_TOP_SGMIIPLL_D2, 1, 1),
+	FACTOR2(CLK_TOP_RTC, CLK_XTAL, 1, 1024),
+	FACTOR2(CLK_TOP_PWM_QTR_26M, CLK_XTAL, 1, 1),
+	FACTOR2(CLK_TOP_CPUM_TCK_IN, CLK_XTAL, 1, 1),
+	FACTOR2(CLK_TOP_TO_USB3_DA_TOP, CLK_XTAL, 1, 1),
+	FACTOR2(CLK_TOP_MEMPLL, CLK_XTAL, 32, 1),
+	FACTOR1(CLK_TOP_DMPLL, CLK_TOP_MEMPLL, 1, 1),
+	FACTOR1(CLK_TOP_DMPLL_D4, CLK_TOP_MEMPLL, 1, 4),
+	FACTOR1(CLK_TOP_DMPLL_D8, CLK_TOP_MEMPLL, 1, 8),
+	FACTOR0(CLK_TOP_SYSPLL_D2, CLK_APMIXED_MAINPLL, 1, 2),
+	FACTOR0(CLK_TOP_SYSPLL1_D2, CLK_APMIXED_MAINPLL, 1, 4),
+	FACTOR0(CLK_TOP_SYSPLL1_D4, CLK_APMIXED_MAINPLL, 1, 8),
+	FACTOR0(CLK_TOP_SYSPLL1_D8, CLK_APMIXED_MAINPLL, 1, 16),
+	FACTOR0(CLK_TOP_SYSPLL1_D16, CLK_APMIXED_MAINPLL, 1, 32),
+	FACTOR0(CLK_TOP_SYSPLL2_D2, CLK_APMIXED_MAINPLL, 1, 6),
+	FACTOR0(CLK_TOP_SYSPLL2_D4, CLK_APMIXED_MAINPLL, 1, 12),
+	FACTOR0(CLK_TOP_SYSPLL2_D8, CLK_APMIXED_MAINPLL, 1, 24),
+	FACTOR0(CLK_TOP_SYSPLL_D5, CLK_APMIXED_MAINPLL, 1, 5),
+	FACTOR0(CLK_TOP_SYSPLL3_D2, CLK_APMIXED_MAINPLL, 1, 10),
+	FACTOR0(CLK_TOP_SYSPLL3_D4, CLK_APMIXED_MAINPLL, 1, 20),
+	FACTOR0(CLK_TOP_SYSPLL_D7, CLK_APMIXED_MAINPLL, 1, 7),
+	FACTOR0(CLK_TOP_SYSPLL4_D2, CLK_APMIXED_MAINPLL, 1, 14),
+	FACTOR0(CLK_TOP_SYSPLL4_D4, CLK_APMIXED_MAINPLL, 1, 28),
+	FACTOR0(CLK_TOP_SYSPLL4_D16, CLK_APMIXED_MAINPLL, 1, 112),
+	FACTOR0(CLK_TOP_UNIVPLL, CLK_APMIXED_UNIV2PLL, 1, 2),
+	FACTOR1(CLK_TOP_UNIVPLL1_D2, CLK_TOP_UNIVPLL, 1, 4),
+	FACTOR1(CLK_TOP_UNIVPLL1_D4, CLK_TOP_UNIVPLL, 1, 8),
+	FACTOR1(CLK_TOP_UNIVPLL1_D8, CLK_TOP_UNIVPLL, 1, 16),
+	FACTOR1(CLK_TOP_UNIVPLL_D3, CLK_TOP_UNIVPLL, 1, 3),
+	FACTOR1(CLK_TOP_UNIVPLL2_D2, CLK_TOP_UNIVPLL, 1, 6),
+	FACTOR1(CLK_TOP_UNIVPLL2_D4, CLK_TOP_UNIVPLL, 1, 12),
+	FACTOR1(CLK_TOP_UNIVPLL2_D8, CLK_TOP_UNIVPLL, 1, 24),
+	FACTOR1(CLK_TOP_UNIVPLL2_D16, CLK_TOP_UNIVPLL, 1, 48),
+	FACTOR1(CLK_TOP_UNIVPLL_D5, CLK_TOP_UNIVPLL, 1, 5),
+	FACTOR1(CLK_TOP_UNIVPLL3_D2, CLK_TOP_UNIVPLL, 1, 10),
+	FACTOR1(CLK_TOP_UNIVPLL3_D4, CLK_TOP_UNIVPLL, 1, 20),
+	FACTOR1(CLK_TOP_UNIVPLL3_D16, CLK_TOP_UNIVPLL, 1, 80),
+	FACTOR1(CLK_TOP_UNIVPLL_D7, CLK_TOP_UNIVPLL, 1, 7),
+	FACTOR1(CLK_TOP_UNIVPLL_D80_D4, CLK_TOP_UNIVPLL, 1, 320),
+	FACTOR1(CLK_TOP_UNIV48M, CLK_TOP_UNIVPLL, 1, 25),
+	FACTOR0(CLK_TOP_SGMIIPLL_D2, CLK_APMIXED_SGMIPLL, 1, 2),
+	FACTOR2(CLK_TOP_CLKXTAL_D4, CLK_XTAL, 1, 4),
+	FACTOR1(CLK_TOP_HD_FAXI, CLK_TOP_AXI_SEL, 1, 1),
+	FACTOR1(CLK_TOP_FAXI, CLK_TOP_AXI_SEL, 1, 1),
+	FACTOR1(CLK_TOP_F_FAUD_INTBUS, CLK_TOP_AUD_INTBUS_SEL, 1, 1),
+	FACTOR1(CLK_TOP_AP2WBHIF_HCLK, CLK_TOP_SYSPLL1_D8, 1, 1),
+	FACTOR1(CLK_TOP_10M_INFRAO, CLK_TOP_10M_SEL, 1, 1),
+	FACTOR1(CLK_TOP_MSDC30_1, CLK_TOP_MSDC30_1, 1, 1),
+	FACTOR1(CLK_TOP_SPI, CLK_TOP_SPI0_SEL, 1, 1),
+	FACTOR1(CLK_TOP_SF, CLK_TOP_NFI_INFRA_SEL, 1, 1),
+	FACTOR1(CLK_TOP_FLASH, CLK_TOP_FLASH_SEL, 1, 1),
+	FACTOR1(CLK_TOP_TO_USB3_REF, CLK_TOP_SATA_SEL, 1, 4),
+	FACTOR1(CLK_TOP_TO_USB3_MCU, CLK_TOP_AXI_SEL, 1, 1),
+	FACTOR1(CLK_TOP_TO_USB3_DMA, CLK_TOP_HIF_SEL, 1, 1),
+	FACTOR1(CLK_TOP_FROM_TOP_AHB, CLK_TOP_AXI_SEL, 1, 1),
+	FACTOR1(CLK_TOP_FROM_TOP_AXI, CLK_TOP_HIF_SEL, 1, 1),
+	FACTOR1(CLK_TOP_PCIE1_MAC_EN, CLK_TOP_UNIVPLL1_D4, 1, 1),
+	FACTOR1(CLK_TOP_PCIE0_MAC_EN, CLK_TOP_UNIVPLL1_D4, 1, 1),
+};
+
+static const int axi_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL1_D2,
+	CLK_TOP_SYSPLL_D5,
+	CLK_TOP_SYSPLL1_D4,
+	CLK_TOP_UNIVPLL_D5,
+	CLK_TOP_UNIVPLL2_D2,
+	CLK_TOP_UNIVPLL_D7,
+	CLK_TOP_DMPLL
+};
+
+static const int mem_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_DMPLL
+};
+
+static const int ddrphycfg_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL1_D8
+};
+
+static const int eth_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL1_D2,
+	CLK_TOP_UNIVPLL1_D2,
+	CLK_TOP_SYSPLL1_D4,
+	CLK_TOP_UNIVPLL_D5,
+	CLK_TOP_SGMIIPLL_D2,
+	CLK_TOP_UNIVPLL_D7,
+	CLK_TOP_DMPLL
+};
+
+static const int pwm_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL2_D4
+};
+
+static const int f10m_ref_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SGMIIPLL_D2
+};
+
+static const int nfi_infra_parents[] = {
+	CLK_XTAL,
+	CLK_XTAL,
+	CLK_XTAL,
+	CLK_XTAL,
+	CLK_XTAL,
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL2_D8,
+	CLK_TOP_UNIVPLL3_D4,
+	CLK_TOP_SYSPLL1_D8,
+	CLK_TOP_UNIVPLL1_D8,
+	CLK_TOP_SYSPLL4_D2,
+	CLK_TOP_SYSPLL2_D4,
+	CLK_TOP_UNIVPLL2_D4,
+	CLK_TOP_UNIVPLL3_D2,
+	CLK_TOP_SYSPLL1_D4,
+	CLK_TOP_SYSPLL_D7
+};
+
+static const int flash_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL_D80_D4,
+	CLK_TOP_SYSPLL2_D8,
+	CLK_TOP_SYSPLL3_D4,
+	CLK_TOP_UNIVPLL3_D4,
+	CLK_TOP_UNIVPLL1_D8,
+	CLK_TOP_SYSPLL2_D4,
+	CLK_TOP_UNIVPLL2_D4
+};
+
+static const int uart_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL2_D8
+};
+
+static const int spi0_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL3_D2,
+	CLK_XTAL,
+	CLK_TOP_SYSPLL2_D4,
+	CLK_TOP_SYSPLL4_D2,
+	CLK_TOP_UNIVPLL2_D4,
+	CLK_TOP_UNIVPLL1_D8,
+	CLK_XTAL
+};
+
+static const int spi1_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL3_D2,
+	CLK_XTAL,
+	CLK_TOP_SYSPLL4_D4,
+	CLK_TOP_SYSPLL4_D2,
+	CLK_TOP_UNIVPLL2_D4,
+	CLK_TOP_UNIVPLL1_D8,
+	CLK_XTAL
+};
+
+static const int msdc30_0_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL2_D16,
+	CLK_TOP_UNIV48M
+};
+
+static const int msdc30_1_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL2_D16,
+	CLK_TOP_UNIV48M,
+	CLK_TOP_SYSPLL2_D4,
+	CLK_TOP_UNIVPLL2_D4,
+	CLK_TOP_SYSPLL_D7,
+	CLK_TOP_SYSPLL2_D2,
+	CLK_TOP_UNIVPLL2_D2
+};
+
+static const int ap2wbmcu_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL1_D2,
+	CLK_TOP_UNIV48M,
+	CLK_TOP_SYSPLL1_D8,
+	CLK_TOP_UNIVPLL2_D4,
+	CLK_TOP_SYSPLL_D7,
+	CLK_TOP_SYSPLL2_D2,
+	CLK_TOP_UNIVPLL2_D2
+};
+
+static const int audio_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL3_D4,
+	CLK_TOP_SYSPLL4_D4,
+	CLK_TOP_SYSPLL1_D16
+};
+
+static const int aud_intbus_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL1_D4,
+	CLK_TOP_SYSPLL4_D2,
+	CLK_TOP_DMPLL_D4
+};
+
+static const int pmicspi_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL1_D8,
+	CLK_TOP_SYSPLL3_D4,
+	CLK_TOP_SYSPLL1_D16,
+	CLK_TOP_UNIVPLL3_D4,
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL2_D4,
+	CLK_TOP_DMPLL_D8
+};
+
+static const int scp_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL1_D8,
+	CLK_TOP_UNIVPLL2_D2,
+	CLK_TOP_UNIVPLL2_D4
+};
+
+static const int atb_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL1_D2,
+	CLK_TOP_SYSPLL_D5
+};
+
+static const int hif_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL1_D2,
+	CLK_TOP_UNIVPLL1_D2,
+	CLK_TOP_SYSPLL1_D4,
+	CLK_TOP_UNIVPLL_D5,
+	-1,
+	CLK_TOP_UNIVPLL_D7
+};
+
+static const int sata_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL2_D4
+};
+
+static const int usb20_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL3_D4,
+	CLK_TOP_SYSPLL1_D8
+};
+
+static const int aud1_parents[] = {
+	CLK_XTAL
+};
+
+static const int irrx_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_SYSPLL4_D16
+};
+
+static const int crypto_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_UNIVPLL_D3,
+	CLK_TOP_UNIVPLL1_D2,
+	CLK_TOP_SYSPLL1_D2,
+	CLK_TOP_UNIVPLL_D5,
+	CLK_TOP_SYSPLL_D5,
+	CLK_TOP_UNIVPLL2_D2,
+	CLK_TOP_SYSPLL_D2
+};
+
+static const int gpt10m_parents[] = {
+	CLK_XTAL,
+	CLK_TOP_CLKXTAL_D4
+};
+
+static const struct mtk_composite top_muxes[] = {
+	/* CLK_CFG_0 */
+	MUX_GATE(CLK_TOP_AXI_SEL, axi_parents, 0x40, 0, 3, 7),
+	MUX_GATE(CLK_TOP_MEM_SEL, mem_parents, 0x40, 8, 1, 15),
+	MUX_GATE(CLK_TOP_DDRPHYCFG_SEL, ddrphycfg_parents, 0x40, 16, 1, 23),
+	MUX_GATE(CLK_TOP_ETH_SEL, eth_parents, 0x40, 24, 3, 31),
+
+	/* CLK_CFG_1 */
+	MUX_GATE(CLK_TOP_PWM_SEL, pwm_parents, 0x50, 0, 2, 7),
+	MUX_GATE(CLK_TOP_F10M_REF_SEL, f10m_ref_parents, 0x50, 8, 1, 15),
+	MUX_GATE(CLK_TOP_NFI_INFRA_SEL, nfi_infra_parents, 0x50, 16, 4, 23),
+	MUX_GATE(CLK_TOP_FLASH_SEL, flash_parents, 0x50, 24, 3, 31),
+
+	/* CLK_CFG_2 */
+	MUX_GATE(CLK_TOP_UART_SEL, uart_parents, 0x60, 0, 1, 7),
+	MUX_GATE(CLK_TOP_SPI0_SEL, spi0_parents, 0x60, 8, 3, 15),
+	MUX_GATE(CLK_TOP_SPI1_SEL, spi1_parents, 0x60, 16, 3, 23),
+	MUX_GATE(CLK_TOP_MSDC50_0_SEL, uart_parents, 0x60, 24, 3, 31),
+
+	/* CLK_CFG_3 */
+	MUX_GATE(CLK_TOP_MSDC30_0_SEL, msdc30_0_parents, 0x70, 0, 3, 7),
+	MUX_GATE(CLK_TOP_MSDC30_1_SEL, msdc30_1_parents, 0x70, 8, 3, 15),
+	MUX_GATE(CLK_TOP_AP2WBMCU_SEL, ap2wbmcu_parents, 0x70, 16, 3, 23),
+	MUX_GATE(CLK_TOP_AP2WBHIF_SEL, ap2wbmcu_parents, 0x70, 24, 3, 31),
+
+	/* CLK_CFG_4 */
+	MUX_GATE(CLK_TOP_AUDIO_SEL, audio_parents, 0x80, 0, 2, 7),
+	MUX_GATE(CLK_TOP_AUD_INTBUS_SEL, aud_intbus_parents, 0x80, 8, 2, 15),
+	MUX_GATE(CLK_TOP_PMICSPI_SEL, pmicspi_parents, 0x80, 16, 3, 23),
+	MUX_GATE(CLK_TOP_SCP_SEL, scp_parents, 0x80, 24, 2, 31),
+
+	/* CLK_CFG_5 */
+	MUX_GATE(CLK_TOP_ATB_SEL, atb_parents, 0x90, 0, 2, 7),
+	MUX_GATE_FLAGS(CLK_TOP_HIF_SEL, hif_parents, 0x90, 8, 3, 15,
+		       CLK_DOMAIN_SCPSYS),
+	MUX_GATE(CLK_TOP_SATA_SEL, sata_parents, 0x90, 16, 1, 23),
+	MUX_GATE(CLK_TOP_U2_SEL, usb20_parents, 0x90, 24, 2, 31),
+
+	/* CLK_CFG_6 */
+	MUX_GATE(CLK_TOP_AUD1_SEL, aud1_parents, 0xA0, 0, 1, 7),
+	MUX_GATE(CLK_TOP_AUD2_SEL, aud1_parents, 0xA0, 8, 1, 15),
+	MUX_GATE(CLK_TOP_IRRX_SEL, irrx_parents, 0xA0, 16, 1, 23),
+	MUX_GATE(CLK_TOP_IRTX_SEL, irrx_parents, 0xA0, 24, 1, 31),
+
+	/* CLK_CFG_7 */
+	MUX_GATE(CLK_TOP_SATA_MCU_SEL, scp_parents, 0xB0, 0, 2, 7),
+	MUX_GATE(CLK_TOP_PCIE0_MCU_SEL, scp_parents, 0xB0, 8, 2, 15),
+	MUX_GATE(CLK_TOP_PCIE1_MCU_SEL, scp_parents, 0xB0, 16, 2, 23),
+	MUX_GATE(CLK_TOP_SSUSB_MCU_SEL, scp_parents, 0xB0, 24, 2, 31),
+
+	/* CLK_CFG_8 */
+	MUX_GATE(CLK_TOP_CRYPTO_SEL, crypto_parents, 0xC0, 0, 3, 7),
+	MUX_GATE(CLK_TOP_SGMII_REF_1_SEL, f10m_ref_parents, 0xC0, 8, 1, 15),
+	MUX_GATE(CLK_TOP_10M_SEL, gpt10m_parents, 0xC0, 16, 1, 23),
+};
+
+/* infracfg */
+static const struct mtk_gate_regs infra_cg_regs = {
+	.set_ofs = 0x40,
+	.clr_ofs = 0x44,
+	.sta_ofs = 0x48,
+};
+
+#define GATE_INFRA(_id, _parent, _shift) {			\
+		.id = _id,					\
+		.parent = _parent,				\
+		.regs = &infra_cg_regs,				\
+		.shift = _shift,				\
+		.flags = CLK_GATE_SETCLR | CLK_PARENT_TOPCKGEN,	\
+	}
+
+static const struct mtk_gate infra_cgs[] = {
+	GATE_INFRA(CLK_INFRA_DBGCLK_PD, CLK_TOP_HD_FAXI, 0),
+	GATE_INFRA(CLK_INFRA_TRNG_PD, CLK_TOP_HD_FAXI, 2),
+	GATE_INFRA(CLK_INFRA_DEVAPC_PD, CLK_TOP_HD_FAXI, 4),
+	GATE_INFRA(CLK_INFRA_APXGPT_PD, CLK_TOP_10M_INFRAO, 18),
+	GATE_INFRA(CLK_INFRA_SEJ_PD, CLK_TOP_10M_INFRAO, 19),
+};
+
+/* pericfg */
+static const struct mtk_gate_regs peri0_cg_regs = {
+	.set_ofs = 0x8,
+	.clr_ofs = 0x10,
+	.sta_ofs = 0x18,
+};
+
+static const struct mtk_gate_regs peri1_cg_regs = {
+	.set_ofs = 0xC,
+	.clr_ofs = 0x14,
+	.sta_ofs = 0x1C,
+};
+
+#define GATE_PERI0(_id, _parent, _shift) {			\
+		.id = _id,					\
+		.parent = _parent,				\
+		.regs = &peri0_cg_regs,				\
+		.shift = _shift,				\
+		.flags = CLK_GATE_SETCLR | CLK_PARENT_TOPCKGEN,	\
+	}
+
+#define GATE_PERI1(_id, _parent, _shift) {			\
+		.id = _id,					\
+		.parent = _parent,				\
+		.regs = &peri1_cg_regs,				\
+		.shift = _shift,				\
+		.flags = CLK_GATE_SETCLR | CLK_PARENT_TOPCKGEN,	\
+	}
+
+static const struct mtk_gate peri_cgs[] = {
+	GATE_PERI0(CLK_PERI_PWM1_PD, CLK_TOP_PWM_QTR_26M, 2),
+	GATE_PERI0(CLK_PERI_PWM2_PD, CLK_TOP_PWM_QTR_26M, 3),
+	GATE_PERI0(CLK_PERI_PWM3_PD, CLK_TOP_PWM_QTR_26M, 4),
+	GATE_PERI0(CLK_PERI_PWM4_PD, CLK_TOP_PWM_QTR_26M, 5),
+	GATE_PERI0(CLK_PERI_PWM5_PD, CLK_TOP_PWM_QTR_26M, 6),
+	GATE_PERI0(CLK_PERI_PWM6_PD, CLK_TOP_PWM_QTR_26M, 7),
+	GATE_PERI0(CLK_PERI_PWM7_PD, CLK_TOP_PWM_QTR_26M, 8),
+	GATE_PERI0(CLK_PERI_PWM_PD, CLK_TOP_PWM_QTR_26M, 9),
+	GATE_PERI0(CLK_PERI_AP_DMA_PD, CLK_TOP_FAXI, 12),
+	GATE_PERI0(CLK_PERI_MSDC30_1_PD, CLK_TOP_MSDC30_1, 14),
+	GATE_PERI0(CLK_PERI_UART0_PD, CLK_TOP_FAXI, 17),
+	GATE_PERI0(CLK_PERI_UART1_PD, CLK_TOP_FAXI, 18),
+	GATE_PERI0(CLK_PERI_UART2_PD, CLK_TOP_FAXI, 19),
+	GATE_PERI0(CLK_PERI_UART3_PD, CLK_TOP_FAXI, 20),
+	GATE_PERI0(CLK_PERI_BTIF_PD, CLK_TOP_FAXI, 22),
+	GATE_PERI0(CLK_PERI_I2C0_PD, CLK_TOP_FAXI, 23),
+	GATE_PERI0(CLK_PERI_SPI0_PD, CLK_TOP_SPI, 28),
+	GATE_PERI0(CLK_PERI_SNFI_PD, CLK_TOP_SF, 29),
+	GATE_PERI0(CLK_PERI_NFI_PD, CLK_TOP_FAXI, 30),
+	GATE_PERI0(CLK_PERI_NFIECC_PD, CLK_TOP_FAXI, 31),
+	GATE_PERI1(CLK_PERI_FLASH_PD, CLK_TOP_FLASH, 1),
+};
+
+/* ethsys */
+static const struct mtk_gate_regs eth_cg_regs = {
+	.sta_ofs = 0x30,
+};
+
+#define GATE_ETH(_id, _parent, _shift, _flag) {			\
+		.id = _id,					\
+		.parent = _parent,				\
+		.regs = &eth_cg_regs,				\
+		.shift = _shift,				\
+		.flags = CLK_GATE_NO_SETCLR_INV | (_flag),	\
+	}
+
+#define GATE_ETH0(_id, _parent, _shift)				\
+	GATE_ETH(_id, _parent, _shift, CLK_PARENT_APMIXED)
+
+#define GATE_ETH1(_id, _parent, _shift)				\
+	GATE_ETH(_id, _parent, _shift, CLK_PARENT_TOPCKGEN)
+
+static const struct mtk_gate eth_cgs[] = {
+	GATE_ETH0(CLK_ETH_FE_EN, CLK_APMIXED_ETH2PLL, 6),
+	GATE_ETH1(CLK_ETH_GP2_EN, CLK_TOP_TXCLK_SRC_PRE, 7),
+	GATE_ETH1(CLK_ETH_GP1_EN, CLK_TOP_TXCLK_SRC_PRE, 8),
+	GATE_ETH1(CLK_ETH_GP0_EN, CLK_TOP_TXCLK_SRC_PRE, 9),
+	GATE_ETH1(CLK_ETH_ESW_EN, CLK_TOP_ETH_500M, 16),
+};
+
+static const struct mtk_gate_regs sgmii_cg_regs = {
+	.set_ofs = 0xE4,
+	.clr_ofs = 0xE4,
+	.sta_ofs = 0xE4,
+};
+
+#define GATE_SGMII(_id, _parent, _shift) {			\
+	.id = _id,						\
+	.parent = _parent,					\
+	.regs = &sgmii_cg_regs,					\
+	.shift = _shift,					\
+	.flags = CLK_GATE_NO_SETCLR_INV | CLK_PARENT_TOPCKGEN,	\
+}
+
+static const struct mtk_gate sgmii_cgs[] = {
+	GATE_SGMII(CLK_SGMII_TX_EN, CLK_TOP_SSUSB_TX250M, 2),
+	GATE_SGMII(CLK_SGMII_RX_EN, CLK_TOP_SSUSB_EQ_RX250M, 3),
+	GATE_SGMII(CLK_SGMII_CDR_REF, CLK_TOP_SSUSB_CDR_REF, 4),
+	GATE_SGMII(CLK_SGMII_CDR_FB, CLK_TOP_SSUSB_CDR_FB, 5),
+};
+
+static const struct mtk_clk_tree mt7629_clk_tree = {
+	.xtal_rate = 40 * MHZ,
+	.xtal2_rate = 20 * MHZ,
+	.fdivs_offs = CLK_TOP_TO_USB3_SYS,
+	.muxes_offs = CLK_TOP_AXI_SEL,
+	.plls = apmixed_plls,
+	.fclks = top_fixed_clks,
+	.fdivs = top_fixed_divs,
+	.muxes = top_muxes,
+};
+
+static int mt7629_mcucfg_probe(struct udevice *dev)
+{
+	void __iomem *base;
+
+	base = dev_read_addr_ptr(dev);
+	if (!base)
+		return -ENOENT;
+
+	clrsetbits_le32(base + MCU_AXI_DIV, AXI_DIV_MSK,
+			AXI_DIV_SEL(0x12));
+	clrsetbits_le32(base + MCU_BUS_MUX, MCU_BUS_MSK,
+			MCU_BUS_SEL(0x1));
+
+	return 0;
+}
+
+static int mt7629_apmixedsys_probe(struct udevice *dev)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(dev);
+	int ret;
+
+	ret = mtk_common_clk_init(dev, &mt7629_clk_tree);
+	if (ret)
+		return ret;
+
+	/* reduce clock square disable time */
+	writel(0x501, priv->base + MT7629_CLKSQ_STB_CON0);
+	/* extend pwr/iso control timing to 1us */
+	writel(0x80008, priv->base + MT7629_PLL_ISO_CON0);
+
+	return 0;
+}
+
+static int mt7629_topckgen_probe(struct udevice *dev)
+{
+	return mtk_common_clk_init(dev, &mt7629_clk_tree);
+}
+
+static int mt7629_infracfg_probe(struct udevice *dev)
+{
+	return mtk_common_clk_gate_init(dev, &mt7629_clk_tree, infra_cgs);
+}
+
+static int mt7629_pericfg_probe(struct udevice *dev)
+{
+	return mtk_common_clk_gate_init(dev, &mt7629_clk_tree, peri_cgs);
+}
+
+static int mt7629_ethsys_probe(struct udevice *dev)
+{
+	return mtk_common_clk_gate_init(dev, &mt7629_clk_tree, eth_cgs);
+}
+
+static int mt7629_sgmiisys_probe(struct udevice *dev)
+{
+	return mtk_common_clk_gate_init(dev, &mt7629_clk_tree, sgmii_cgs);
+}
+
+static const struct udevice_id mt7629_apmixed_compat[] = {
+	{ .compatible = "mediatek,mt7629-apmixedsys" },
+	{ }
+};
+
+static const struct udevice_id mt7629_topckgen_compat[] = {
+	{ .compatible = "mediatek,mt7629-topckgen" },
+	{ }
+};
+
+static const struct udevice_id mt7629_infracfg_compat[] = {
+	{ .compatible = "mediatek,mt7629-infracfg", },
+	{ }
+};
+
+static const struct udevice_id mt7629_pericfg_compat[] = {
+	{ .compatible = "mediatek,mt7629-pericfg", },
+	{ }
+};
+
+static const struct udevice_id mt7629_ethsys_compat[] = {
+	{ .compatible = "mediatek,mt7629-ethsys", },
+	{ }
+};
+
+static const struct udevice_id mt7629_sgmiisys_compat[] = {
+	{ .compatible = "mediatek,mt7629-sgmiisys", },
+	{ }
+};
+
+static const struct udevice_id mt7629_mcucfg_compat[] = {
+	{ .compatible = "mediatek,mt7629-mcucfg" },
+	{ }
+};
+
+U_BOOT_DRIVER(mtk_mcucfg) = {
+	.name = "mt7629-mcucfg",
+	.id = UCLASS_SYSCON,
+	.of_match = mt7629_mcucfg_compat,
+	.probe = mt7629_mcucfg_probe,
+	.flags = DM_FLAG_PRE_RELOC,
+};
+
+U_BOOT_DRIVER(mtk_clk_apmixedsys) = {
+	.name = "mt7629-clock-apmixedsys",
+	.id = UCLASS_CLK,
+	.of_match = mt7629_apmixed_compat,
+	.probe = mt7629_apmixedsys_probe,
+	.priv_auto_alloc_size = sizeof(struct mtk_clk_priv),
+	.ops = &mtk_clk_apmixedsys_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};
+
+U_BOOT_DRIVER(mtk_clk_topckgen) = {
+	.name = "mt7629-clock-topckgen",
+	.id = UCLASS_CLK,
+	.of_match = mt7629_topckgen_compat,
+	.probe = mt7629_topckgen_probe,
+	.priv_auto_alloc_size = sizeof(struct mtk_clk_priv),
+	.ops = &mtk_clk_topckgen_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};
+
+U_BOOT_DRIVER(mtk_clk_infracfg) = {
+	.name = "mt7629-clock-infracfg",
+	.id = UCLASS_CLK,
+	.of_match = mt7629_infracfg_compat,
+	.probe = mt7629_infracfg_probe,
+	.priv_auto_alloc_size = sizeof(struct mtk_cg_priv),
+	.ops = &mtk_clk_gate_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};
+
+U_BOOT_DRIVER(mtk_clk_pericfg) = {
+	.name = "mt7629-clock-pericfg",
+	.id = UCLASS_CLK,
+	.of_match = mt7629_pericfg_compat,
+	.probe = mt7629_pericfg_probe,
+	.priv_auto_alloc_size = sizeof(struct mtk_cg_priv),
+	.ops = &mtk_clk_gate_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};
+
+U_BOOT_DRIVER(mtk_clk_ethsys) = {
+	.name = "mt7629-clock-ethsys",
+	.id = UCLASS_CLK,
+	.of_match = mt7629_ethsys_compat,
+	.probe = mt7629_ethsys_probe,
+	.priv_auto_alloc_size = sizeof(struct mtk_cg_priv),
+	.ops = &mtk_clk_gate_ops,
+};
+
+U_BOOT_DRIVER(mtk_clk_sgmiisys) = {
+	.name = "mt7629-clock-sgmiisys",
+	.id = UCLASS_CLK,
+	.of_match = mt7629_sgmiisys_compat,
+	.probe = mt7629_sgmiisys_probe,
+	.priv_auto_alloc_size = sizeof(struct mtk_cg_priv),
+	.ops = &mtk_clk_gate_ops,
+};
diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
new file mode 100644
index 00000000000..870b14ed8b2
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -0,0 +1,493 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek common clock driver
+ *
+ * Copyright (C) 2018 MediaTek Inc.
+ * Author: Ryder Lee <ryder.lee@mediatek.com>
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <div64.h>
+#include <dm.h>
+#include <asm/io.h>
+
+#include "clk-mtk.h"
+
+#define REG_CON0			0
+#define REG_CON1			4
+
+#define CON0_BASE_EN			BIT(0)
+#define CON0_PWR_ON			BIT(0)
+#define CON0_ISO_EN			BIT(1)
+#define CON1_PCW_CHG			BIT(31)
+
+#define POSTDIV_MASK			0x7
+#define INTEGER_BITS			7
+
+/* scpsys clock off control */
+#define CLK_SCP_CFG0			0x200
+#define CLK_SCP_CFG1			0x204
+#define SCP_ARMCK_OFF_EN		GENMASK(9, 0)
+#define SCP_AXICK_DCM_DIS_EN		BIT(0)
+#define SCP_AXICK_26M_SEL_EN		BIT(4)
+
+/* shared functions */
+
+/*
+ * In case the rate change propagation to parent clocks is undesirable,
+ * this function is recursively called to find the parent to calculate
+ * the accurate frequency.
+ */
+static int mtk_clk_find_parent_rate(struct clk *clk, int id,
+				    const struct driver *drv)
+{
+	struct clk parent = { .id = id, };
+
+	if (drv) {
+		struct udevice *dev;
+
+		if (uclass_get_device_by_driver(UCLASS_CLK, drv, &dev))
+			return -ENODEV;
+
+		parent.dev = dev;
+	} else {
+		parent.dev = clk->dev;
+	}
+
+	return clk_get_rate(&parent);
+}
+
+static int mtk_clk_mux_set_parent(void __iomem *base, u32 parent,
+				  const struct mtk_composite *mux)
+{
+	u32 val, index = 0;
+
+	while (mux->parent[index] != parent)
+		if (++index == mux->num_parents)
+			return -EINVAL;
+
+	/* switch mux to a select parent */
+	val = readl(base + mux->mux_reg);
+	val &= ~(mux->mux_mask << mux->mux_shift);
+
+	val |= index << mux->mux_shift;
+	writel(val, base + mux->mux_reg);
+
+	return 0;
+}
+
+/* apmixedsys functions */
+
+static unsigned long __mtk_pll_recalc_rate(const struct mtk_pll_data *pll,
+					   u32 fin, u32 pcw, int postdiv)
+{
+	int pcwbits = pll->pcwbits;
+	int pcwfbits;
+	u64 vco;
+	u8 c = 0;
+
+	/* The fractional part of the PLL divider. */
+	pcwfbits = pcwbits > INTEGER_BITS ? pcwbits - INTEGER_BITS : 0;
+
+	vco = (u64)fin * pcw;
+
+	if (pcwfbits && (vco & GENMASK(pcwfbits - 1, 0)))
+		c = 1;
+
+	vco >>= pcwfbits;
+
+	if (c)
+		vco++;
+
+	return ((unsigned long)vco + postdiv - 1) / postdiv;
+}
+
+/**
+ * MediaTek PLLs are configured through their pcw value. The pcw value
+ * describes a divider in the PLL feedback loop which consists of 7 bits
+ * for the integer part and the remaining bits (if present) for the
+ * fractional part. Also they have a 3 bit power-of-two post divider.
+ */
+static void mtk_pll_set_rate_regs(struct clk *clk, u32 pcw, int postdiv)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_pll_data *pll = &priv->tree->plls[clk->id];
+	u32 val;
+
+	/* set postdiv */
+	val = readl(priv->base + pll->pd_reg);
+	val &= ~(POSTDIV_MASK << pll->pd_shift);
+	val |= (ffs(postdiv) - 1) << pll->pd_shift;
+
+	/* postdiv and pcw need to set at the same time if on same register */
+	if (pll->pd_reg != pll->pcw_reg) {
+		writel(val, priv->base + pll->pd_reg);
+		val = readl(priv->base + pll->pcw_reg);
+	}
+
+	/* set pcw */
+	val &= ~GENMASK(pll->pcw_shift + pll->pcwbits - 1, pll->pcw_shift);
+	val |= pcw << pll->pcw_shift;
+	val &= ~CON1_PCW_CHG;
+	writel(val, priv->base + pll->pcw_reg);
+
+	val |= CON1_PCW_CHG;
+	writel(val, priv->base + pll->pcw_reg);
+
+	udelay(20);
+}
+
+/**
+ * mtk_pll_calc_values - calculate good values for a given input frequency.
+ * @clk:	The clk
+ * @pcw:	The pcw value (output)
+ * @postdiv:	The post divider (output)
+ * @freq:	The desired target frequency
+ */
+static void mtk_pll_calc_values(struct clk *clk, u32 *pcw, u32 *postdiv,
+				u32 freq)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_pll_data *pll = &priv->tree->plls[clk->id];
+	unsigned long fmin = 1000 * MHZ;
+	u64 _pcw;
+	u32 val;
+
+	if (freq > pll->fmax)
+		freq = pll->fmax;
+
+	for (val = 0; val < 5; val++) {
+		*postdiv = 1 << val;
+		if ((u64)freq * *postdiv >= fmin)
+			break;
+	}
+
+	/* _pcw = freq * postdiv / xtal_rate * 2^pcwfbits */
+	_pcw = ((u64)freq << val) << (pll->pcwbits - INTEGER_BITS);
+	do_div(_pcw, priv->tree->xtal2_rate);
+
+	*pcw = (u32)_pcw;
+}
+
+static ulong mtk_apmixedsys_set_rate(struct clk *clk, ulong rate)
+{
+	u32 pcw = 0;
+	u32 postdiv;
+
+	mtk_pll_calc_values(clk, &pcw, &postdiv, rate);
+	mtk_pll_set_rate_regs(clk, pcw, postdiv);
+
+	return 0;
+}
+
+static ulong mtk_apmixedsys_get_rate(struct clk *clk)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_pll_data *pll = &priv->tree->plls[clk->id];
+	u32 postdiv;
+	u32 pcw;
+
+	postdiv = (readl(priv->base + pll->pd_reg) >> pll->pd_shift) &
+		   POSTDIV_MASK;
+	postdiv = 1 << postdiv;
+
+	pcw = readl(priv->base + pll->pcw_reg) >> pll->pcw_shift;
+	pcw &= GENMASK(pll->pcwbits - 1, 0);
+
+	return __mtk_pll_recalc_rate(pll, priv->tree->xtal2_rate,
+				     pcw, postdiv);
+}
+
+static int mtk_apmixedsys_enable(struct clk *clk)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_pll_data *pll = &priv->tree->plls[clk->id];
+	u32 r;
+
+	r = readl(priv->base + pll->pwr_reg) | CON0_PWR_ON;
+	writel(r, priv->base + pll->pwr_reg);
+	udelay(1);
+
+	r = readl(priv->base + pll->pwr_reg) & ~CON0_ISO_EN;
+	writel(r, priv->base + pll->pwr_reg);
+	udelay(1);
+
+	r = readl(priv->base + pll->reg + REG_CON0);
+	r |= pll->en_mask;
+	writel(r, priv->base + pll->reg + REG_CON0);
+
+	udelay(20);
+
+	if (pll->flags & HAVE_RST_BAR) {
+		r = readl(priv->base + pll->reg + REG_CON0);
+		r |= pll->rst_bar_mask;
+		writel(r, priv->base + pll->reg + REG_CON0);
+	}
+
+	return 0;
+}
+
+static int mtk_apmixedsys_disable(struct clk *clk)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_pll_data *pll = &priv->tree->plls[clk->id];
+	u32 r;
+
+	if (pll->flags & HAVE_RST_BAR) {
+		r = readl(priv->base + pll->reg + REG_CON0);
+		r &= ~pll->rst_bar_mask;
+		writel(r, priv->base + pll->reg + REG_CON0);
+	}
+
+	r = readl(priv->base + pll->reg + REG_CON0);
+	r &= ~CON0_BASE_EN;
+	writel(r, priv->base + pll->reg + REG_CON0);
+
+	r = readl(priv->base + pll->pwr_reg) | CON0_ISO_EN;
+	writel(r, priv->base + pll->pwr_reg);
+
+	r = readl(priv->base + pll->pwr_reg) & ~CON0_PWR_ON;
+	writel(r, priv->base + pll->pwr_reg);
+
+	return 0;
+}
+
+/* topckgen functions */
+
+static ulong mtk_factor_recalc_rate(const struct mtk_fixed_factor *fdiv,
+				    ulong parent_rate)
+{
+	u64 rate = parent_rate * fdiv->mult;
+
+	do_div(rate, fdiv->div);
+
+	return rate;
+}
+
+static int mtk_topckgen_get_factor_rate(struct clk *clk, u32 off)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_fixed_factor *fdiv = &priv->tree->fdivs[off];
+	ulong rate;
+
+	switch (fdiv->flags & CLK_PARENT_MASK) {
+	case CLK_PARENT_APMIXED:
+		rate = mtk_clk_find_parent_rate(clk, fdiv->parent,
+				DM_GET_DRIVER(mtk_clk_apmixedsys));
+		break;
+	case CLK_PARENT_TOPCKGEN:
+		rate = mtk_clk_find_parent_rate(clk, fdiv->parent, NULL);
+		break;
+
+	default:
+		rate = priv->tree->xtal_rate;
+	}
+
+	return mtk_factor_recalc_rate(fdiv, rate);
+}
+
+static int mtk_topckgen_get_mux_rate(struct clk *clk, u32 off)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_composite *mux = &priv->tree->muxes[off];
+	u32 index;
+
+	index = readl(priv->base + mux->mux_reg);
+	index &= mux->mux_mask << mux->mux_shift;
+	index = index >> mux->mux_shift;
+
+	if (mux->parent[index])
+		return mtk_clk_find_parent_rate(clk, mux->parent[index],
+						NULL);
+
+	return priv->tree->xtal_rate;
+}
+
+static ulong mtk_topckgen_get_rate(struct clk *clk)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (clk->id < priv->tree->fdivs_offs)
+		return priv->tree->fclks[clk->id].rate;
+	else if (clk->id < priv->tree->muxes_offs)
+		return mtk_topckgen_get_factor_rate(clk, clk->id -
+						    priv->tree->fdivs_offs);
+	else
+		return mtk_topckgen_get_mux_rate(clk, clk->id -
+						 priv->tree->muxes_offs);
+}
+
+static int mtk_topckgen_enable(struct clk *clk)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_composite *mux;
+	u32 val;
+
+	if (clk->id < priv->tree->muxes_offs)
+		return 0;
+
+	mux = &priv->tree->muxes[clk->id - priv->tree->muxes_offs];
+	if (mux->gate_shift < 0)
+		return 0;
+
+	/* enable clock gate */
+	val = readl(priv->base + mux->gate_reg);
+	val &= ~BIT(mux->gate_shift);
+	writel(val, priv->base + mux->gate_reg);
+
+	if (mux->flags & CLK_DOMAIN_SCPSYS) {
+		/* enable scpsys clock off control */
+		writel(SCP_ARMCK_OFF_EN, priv->base + CLK_SCP_CFG0);
+		writel(SCP_AXICK_DCM_DIS_EN | SCP_AXICK_26M_SEL_EN,
+		       priv->base + CLK_SCP_CFG1);
+	}
+
+	return 0;
+}
+
+static int mtk_topckgen_disable(struct clk *clk)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_composite *mux;
+	u32 val;
+
+	if (clk->id < priv->tree->muxes_offs)
+		return 0;
+
+	mux = &priv->tree->muxes[clk->id - priv->tree->muxes_offs];
+	if (mux->gate_shift < 0)
+		return 0;
+
+	/* disable clock gate */
+	val = readl(priv->base + mux->gate_reg);
+	val |= BIT(mux->gate_shift);
+	writel(val, priv->base + mux->gate_reg);
+
+	return 0;
+}
+
+static int mtk_topckgen_set_parent(struct clk *clk, struct clk *parent)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (clk->id < priv->tree->muxes_offs)
+		return 0;
+
+	return mtk_clk_mux_set_parent(priv->base, parent->id,
+			&priv->tree->muxes[clk->id - priv->tree->muxes_offs]);
+}
+
+/* CG functions */
+
+static int mtk_clk_gate_enable(struct clk *clk)
+{
+	struct mtk_cg_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_gate *gate = &priv->gates[clk->id];
+	u32 bit = BIT(gate->shift);
+
+	switch (gate->flags & CLK_GATE_MASK) {
+	case CLK_GATE_SETCLR:
+		writel(bit, priv->base + gate->regs->clr_ofs);
+		break;
+	case CLK_GATE_NO_SETCLR_INV:
+		clrsetbits_le32(priv->base + gate->regs->sta_ofs, bit, bit);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int mtk_clk_gate_disable(struct clk *clk)
+{
+	struct mtk_cg_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_gate *gate = &priv->gates[clk->id];
+	u32 bit = BIT(gate->shift);
+
+	switch (gate->flags & CLK_GATE_MASK) {
+	case CLK_GATE_SETCLR:
+		writel(bit, priv->base + gate->regs->set_ofs);
+		break;
+	case CLK_GATE_NO_SETCLR_INV:
+		clrsetbits_le32(priv->base + gate->regs->sta_ofs, bit, 0);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static ulong mtk_clk_gate_get_rate(struct clk *clk)
+{
+	struct mtk_cg_priv *priv = dev_get_priv(clk->dev);
+	const struct mtk_gate *gate = &priv->gates[clk->id];
+
+	switch (gate->flags & CLK_PARENT_MASK) {
+	case CLK_PARENT_APMIXED:
+		return mtk_clk_find_parent_rate(clk, gate->parent,
+				DM_GET_DRIVER(mtk_clk_apmixedsys));
+		break;
+	case CLK_PARENT_TOPCKGEN:
+		return mtk_clk_find_parent_rate(clk, gate->parent,
+				DM_GET_DRIVER(mtk_clk_topckgen));
+		break;
+
+	default:
+		return priv->tree->xtal_rate;
+	}
+}
+
+const struct clk_ops mtk_clk_apmixedsys_ops = {
+	.enable = mtk_apmixedsys_enable,
+	.disable = mtk_apmixedsys_disable,
+	.set_rate = mtk_apmixedsys_set_rate,
+	.get_rate = mtk_apmixedsys_get_rate,
+};
+
+const struct clk_ops mtk_clk_topckgen_ops = {
+	.enable = mtk_topckgen_enable,
+	.disable = mtk_topckgen_disable,
+	.get_rate = mtk_topckgen_get_rate,
+	.set_parent = mtk_topckgen_set_parent,
+};
+
+const struct clk_ops mtk_clk_gate_ops = {
+	.enable = mtk_clk_gate_enable,
+	.disable = mtk_clk_gate_disable,
+	.get_rate = mtk_clk_gate_get_rate,
+};
+
+int mtk_common_clk_init(struct udevice *dev,
+			const struct mtk_clk_tree *tree)
+{
+	struct mtk_clk_priv *priv = dev_get_priv(dev);
+
+	priv->base = dev_read_addr_ptr(dev);
+	if (!priv->base)
+		return -ENOENT;
+
+	priv->tree = tree;
+
+	return 0;
+}
+
+int mtk_common_clk_gate_init(struct udevice *dev,
+			     const struct mtk_clk_tree *tree,
+			     const struct mtk_gate *gates)
+{
+	struct mtk_cg_priv *priv = dev_get_priv(dev);
+
+	priv->base = dev_read_addr_ptr(dev);
+	if (!priv->base)
+		return -ENOENT;
+
+	priv->tree = tree;
+	priv->gates = gates;
+
+	return 0;
+}
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
new file mode 100644
index 00000000000..74152ed9c6e
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -0,0 +1,194 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 MediaTek Inc.
+ * Author: Ryder Lee <ryder.lee@mediatek.com>
+ */
+
+#ifndef __DRV_CLK_MTK_H
+#define __DRV_CLK_MTK_H
+
+#define CLK_XTAL			0
+#define MHZ				(1000 * 1000)
+
+#define HAVE_RST_BAR			BIT(0)
+#define CLK_DOMAIN_SCPSYS		BIT(0)
+
+#define CLK_GATE_SETCLR			BIT(0)
+#define CLK_GATE_SETCLR_INV		BIT(1)
+#define CLK_GATE_NO_SETCLR		BIT(2)
+#define CLK_GATE_NO_SETCLR_INV		BIT(3)
+#define CLK_GATE_MASK			GENMASK(3, 0)
+
+#define CLK_PARENT_APMIXED		BIT(4)
+#define CLK_PARENT_TOPCKGEN		BIT(5)
+#define CLK_PARENT_MASK			GENMASK(5, 4)
+
+/* struct mtk_pll_data - hardware-specific PLLs data */
+struct mtk_pll_data {
+	const int id;
+	u32 reg;
+	u32 pwr_reg;
+	u32 en_mask;
+	u32 pd_reg;
+	int pd_shift;
+	u32 flags;
+	u32 rst_bar_mask;
+	u64 fmax;
+	int pcwbits;
+	u32 pcw_reg;
+	int pcw_shift;
+};
+
+/**
+ * struct mtk_fixed_clk - fixed clocks
+ *
+ * @id:		index of clocks
+ * @parent:	index of parnet clocks
+ * @rate:	fixed rate
+ */
+struct mtk_fixed_clk {
+	const int id;
+	const int parent;
+	unsigned long rate;
+};
+
+#define FIXED_CLK(_id, _parent, _rate) {		\
+		.id = _id,				\
+		.parent = _parent,			\
+		.rate = _rate,				\
+	}
+
+/**
+ * struct mtk_fixed_factor - fixed multiplier and divider clocks
+ *
+ * @id:		index of clocks
+ * @parent:	index of parnet clocks
+ * @mult:	multiplier
+ * @div:	divider
+ * @flag:	hardware-specific flags
+ */
+struct mtk_fixed_factor {
+	const int id;
+	const int parent;
+	u32 mult;
+	u32 div;
+	u32 flags;
+};
+
+#define FACTOR(_id, _parent, _mult, _div, _flags) {	\
+		.id = _id,				\
+		.parent = _parent,			\
+		.mult = _mult,				\
+		.div = _div,				\
+		.flags = _flags,			\
+	}
+
+/**
+ * struct mtk_composite - aggregate clock of mux, divider and gate clocks
+ *
+ * @id:			index of clocks
+ * @parent:		index of parnet clocks
+ * @mux_reg:		hardware-specific mux register
+ * @gate_reg:		hardware-specific gate register
+ * @mux_mask:		mask to the mux bit field
+ * @mux_shift:		shift to the mux bit field
+ * @gate_shift:		shift to the gate bit field
+ * @num_parents:	number of parent clocks
+ * @flags:		hardware-specific flags
+ */
+struct mtk_composite {
+	const int id;
+	const int *parent;
+	u32 mux_reg;
+	u32 gate_reg;
+	u32 mux_mask;
+	signed char mux_shift;
+	signed char gate_shift;
+	signed char num_parents;
+	u16 flags;
+};
+
+#define MUX_GATE_FLAGS(_id, _parents, _reg, _shift, _width, _gate,	\
+		       _flags) {					\
+		.id = _id,						\
+		.mux_reg = _reg,					\
+		.mux_shift = _shift,					\
+		.mux_mask = BIT(_width) - 1,				\
+		.gate_reg = _reg,					\
+		.gate_shift = _gate,					\
+		.parent = _parents,					\
+		.num_parents = ARRAY_SIZE(_parents),			\
+		.flags = _flags,					\
+	}
+
+#define MUX_GATE(_id, _parents, _reg, _shift, _width, _gate)		\
+	MUX_GATE_FLAGS(_id, _parents, _reg, _shift, _width, _gate, 0)
+
+#define MUX(_id, _parents, _reg, _shift, _width) {			\
+		.id = _id,						\
+		.mux_reg = _reg,					\
+		.mux_shift = _shift,					\
+		.mux_mask = BIT(_width) - 1,				\
+		.gate_shift = -1,					\
+		.parent = _parents,					\
+		.num_parents = ARRAY_SIZE(_parents),			\
+		.flags = 0,						\
+	}
+
+struct mtk_gate_regs {
+	u32 sta_ofs;
+	u32 clr_ofs;
+	u32 set_ofs;
+};
+
+/**
+ * struct mtk_gate - gate clocks
+ *
+ * @id:		index of gate clocks
+ * @parent:	index of parnet clocks
+ * @regs:	hardware-specific mux register
+ * @shift:	shift to the gate bit field
+ * @flags:	hardware-specific flags
+ */
+struct mtk_gate {
+	const int id;
+	const int parent;
+	const struct mtk_gate_regs *regs;
+	int shift;
+	u32 flags;
+};
+
+/* struct mtk_clk_tree - clock tree */
+struct mtk_clk_tree {
+	unsigned long xtal_rate;
+	unsigned long xtal2_rate;
+	const int fdivs_offs;
+	const int muxes_offs;
+	const struct mtk_pll_data *plls;
+	const struct mtk_fixed_clk *fclks;
+	const struct mtk_fixed_factor *fdivs;
+	const struct mtk_composite *muxes;
+};
+
+struct mtk_clk_priv {
+	void __iomem *base;
+	const struct mtk_clk_tree *tree;
+};
+
+struct mtk_cg_priv {
+	void __iomem *base;
+	const struct mtk_clk_tree *tree;
+	const struct mtk_gate *gates;
+};
+
+extern const struct clk_ops mtk_clk_apmixedsys_ops;
+extern const struct clk_ops mtk_clk_topckgen_ops;
+extern const struct clk_ops mtk_clk_gate_ops;
+
+int mtk_common_clk_init(struct udevice *dev,
+			const struct mtk_clk_tree *tree);
+int mtk_common_clk_gate_init(struct udevice *dev,
+			     const struct mtk_clk_tree *tree,
+			     const struct mtk_gate *gates);
+
+#endif /* __DRV_CLK_MTK_H */