pinctrl: add support for MediaTek MT7628

This patch adds pinctrl support for mt7628, with a file for common pinmux
functions and a file for mt7628 which has additional support for pinconf.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>

7 files changed, 747 insertions, 0 deletions

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index deee92411c9..eadcfd66528 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -269,6 +269,7 @@ source "drivers/pinctrl/exynos/Kconfig"
 source "drivers/pinctrl/mediatek/Kconfig"
 source "drivers/pinctrl/meson/Kconfig"
 source "drivers/pinctrl/mscc/Kconfig"
+source "drivers/pinctrl/mtmips/Kconfig"
 source "drivers/pinctrl/mvebu/Kconfig"
 source "drivers/pinctrl/nxp/Kconfig"
 source "drivers/pinctrl/renesas/Kconfig"
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 4b080b74dcd..ce0879a2b71 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -9,6 +9,7 @@ obj-y					+= nxp/
 obj-$(CONFIG_$(SPL_)PINCTRL_ROCKCHIP)	+= rockchip/
 obj-$(CONFIG_ARCH_ASPEED) += aspeed/
 obj-$(CONFIG_ARCH_ATH79) += ath79/
+obj-$(CONFIG_ARCH_MTMIPS) += mtmips/
 obj-$(CONFIG_ARCH_RMOBILE) += renesas/
 obj-$(CONFIG_PINCTRL_SANDBOX)	+= pinctrl-sandbox.o
 
diff --git a/drivers/pinctrl/mtmips/Kconfig b/drivers/pinctrl/mtmips/Kconfig
new file mode 100644
index 00000000000..8482a38ebc3
--- /dev/null
+++ b/drivers/pinctrl/mtmips/Kconfig
@@ -0,0 +1,13 @@
+
+config PINCTRL_MTMIPS
+	depends on ARCH_MTMIPS
+	bool
+
+config PINCTRL_MT7628
+	bool "MediaTek MT7628 pin control driver"
+	select PINCTRL_MTMIPS
+	depends on SOC_MT7628 && PINCTRL_GENERIC
+	help
+	  Support pin multiplexing control on MediaTek MT7628.
+	  The driver is controlled by a device tree node which contains
+	  the pin mux functions for each available pin groups.
diff --git a/drivers/pinctrl/mtmips/Makefile b/drivers/pinctrl/mtmips/Makefile
new file mode 100644
index 00000000000..3ba5c0c66d7
--- /dev/null
+++ b/drivers/pinctrl/mtmips/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Core
+obj-$(CONFIG_PINCTRL_MTMIPS) += pinctrl-mtmips-common.o
+
+# SoC Drivers
+obj-$(CONFIG_PINCTRL_MT7628) += pinctrl-mt7628.o
diff --git a/drivers/pinctrl/mtmips/pinctrl-mt7628.c b/drivers/pinctrl/mtmips/pinctrl-mt7628.c
new file mode 100644
index 00000000000..fc9d8b5ad10
--- /dev/null
+++ b/drivers/pinctrl/mtmips/pinctrl-mt7628.c
@@ -0,0 +1,585 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/pinctrl.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+
+#include "pinctrl-mtmips-common.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define AGPIO_OFS			0
+#define GPIOMODE1_OFS			0x24
+#define GPIOMODE2_OFS			0x28
+
+#define EPHY4_1_PAD_SHIFT		17
+#define EPHY4_1_PAD_MASK		0x0f
+#define EPHY0_SHIFT			16
+#define RF_OLT_MODE_SHIFT		12
+#define N9_EINT_SRC_SHIFT		9
+#define WLED_OD_SHIFT			8
+#define REF_CLKO_PAD_SHIFT		4
+#define I2S_CLK_PAD_SHIFT		3
+#define I2S_WS_PAD_SHIFT		2
+#define I2S_SDO_PAD_SHIFT		1
+#define I2S_SDI_PAD_SHIFT		0
+
+#define GM4_MASK			3
+
+#define P4LED_K_SHIFT			26
+#define P3LED_K_SHIFT			24
+#define P2LED_K_SHIFT			22
+#define P1LED_K_SHIFT			20
+#define P0LED_K_SHIFT			18
+#define WLED_K_SHIFT			16
+#define P4LED_A_SHIFT			10
+#define P3LED_A_SHIFT			8
+#define P2LED_A_SHIFT			6
+#define P1LED_A_SHIFT			4
+#define P0LED_A_SHIFT			2
+#define WLED_A_SHIFT			0
+
+#define PWM1_SHIFT			30
+#define PWM0_SHIFT			28
+#define UART2_SHIFT			26
+#define UART1_SHIFT			24
+#define I2C_SHIFT			20
+#define REFCLK_SHIFT			18
+#define PERST_SHIFT			16
+#define ESD_SHIFT			15
+#define WDT_SHIFT			14
+#define SPI_SHIFT			12
+#define SDMODE_SHIFT			10
+#define UART0_SHIFT			8
+#define I2S_SHIFT			6
+#define SPI_CS1_SHIFT			4
+#define SPIS_SHIFT			2
+#define GPIO0_SHIFT			0
+
+#define PAD_PU_G0_REG			0x00
+#define PAD_PU_G1_REG			0x04
+#define PAD_PD_G0_REG			0x10
+#define PAD_PD_G1_REG			0x14
+#define PAD_SR_G0_REG			0x20
+#define PAD_SR_G1_REG			0x24
+#define PAD_SMT_G0_REG			0x30
+#define PAD_SMT_G1_REG			0x34
+#define PAD_E2_G0_REG			0x40
+#define PAD_E2_G1_REG			0x44
+#define PAD_E4_G0_REG			0x50
+#define PAD_E4_G1_REG			0x54
+#define PAD_E8_G0_REG			0x60
+#define PAD_E8_G1_REG			0x64
+
+#define PIN_CONFIG_DRIVE_STRENGTH_28	(PIN_CONFIG_END + 1)
+#define PIN_CONFIG_DRIVE_STRENGTH_4G	(PIN_CONFIG_END + 2)
+
+struct mt7628_pinctrl_priv {
+	struct mtmips_pinctrl_priv mp;
+
+	void __iomem *pcbase;
+};
+
+#if CONFIG_IS_ENABLED(PINMUX)
+static const struct mtmips_pmx_func ephy4_1_pad_grp[] = {
+	FUNC("digital", 0xf),
+	FUNC("analog", 0),
+};
+
+static const struct mtmips_pmx_func ephy0_grp[] = {
+	FUNC("disable", 1),
+	FUNC("enable", 0),
+};
+
+static const struct mtmips_pmx_func rf_olt_grp[] = {
+	FUNC("enable", 1),
+	FUNC("disable", 0),
+};
+
+static const struct mtmips_pmx_func n9_eint_src_grp[] = {
+	FUNC("gpio", 1),
+	FUNC("utif", 0),
+};
+
+static const struct mtmips_pmx_func wlen_od_grp[] = {
+	FUNC("enable", 1),
+	FUNC("disable", 0),
+};
+
+static const struct mtmips_pmx_func ref_clko_grp[] = {
+	FUNC("digital", 1),
+	FUNC("analog", 0),
+};
+
+static const struct mtmips_pmx_func i2s_clk_grp[] = {
+	FUNC("digital", 1),
+	FUNC("analog", 0),
+};
+
+static const struct mtmips_pmx_func i2s_ws_grp[] = {
+	FUNC("digital", 1),
+	FUNC("analog", 0),
+};
+
+static const struct mtmips_pmx_func i2s_sdo_grp[] = {
+	FUNC("digital", 1),
+	FUNC("analog", 0),
+};
+
+static const struct mtmips_pmx_func i2s_sdi_grp[] = {
+	FUNC("digital", 1),
+	FUNC("analog", 0),
+};
+
+static const struct mtmips_pmx_func pwm1_grp[] = {
+	FUNC("sdxc d6", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("pwm1", 0),
+};
+
+static const struct mtmips_pmx_func pwm0_grp[] = {
+	FUNC("sdxc d7", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("pwm0", 0),
+};
+
+static const struct mtmips_pmx_func uart2_grp[] = {
+	FUNC("sdxc d5 d4", 3),
+	FUNC("pwm", 2),
+	FUNC("gpio", 1),
+	FUNC("uart2", 0),
+};
+
+static const struct mtmips_pmx_func uart1_grp[] = {
+	FUNC("sw_r", 3),
+	FUNC("pwm", 2),
+	FUNC("gpio", 1),
+	FUNC("uart1", 0),
+};
+
+static const struct mtmips_pmx_func i2c_grp[] = {
+	FUNC("-", 3),
+	FUNC("debug", 2),
+	FUNC("gpio", 1),
+	FUNC("i2c", 0),
+};
+
+static const struct mtmips_pmx_func refclk_grp[] = {
+	FUNC("gpio", 1),
+	FUNC("refclk", 0),
+};
+
+static const struct mtmips_pmx_func perst_grp[] = {
+	FUNC("gpio", 1),
+	FUNC("perst", 0),
+};
+
+static const struct mtmips_pmx_func esd_grp[] = {
+	FUNC("router", 1),
+	FUNC("iot", 0),
+};
+
+static const struct mtmips_pmx_func wdt_grp[] = {
+	FUNC("gpio", 1),
+	FUNC("wdt", 0),
+};
+
+static const struct mtmips_pmx_func spi_grp[] = {
+	FUNC("gpio", 1),
+	FUNC("spi", 0),
+};
+
+static const struct mtmips_pmx_func sd_mode_grp[] = {
+	FUNC("n9 jtag", 3),
+	FUNC("utif1", 2),
+	FUNC("gpio", 1),
+	FUNC("sdxc", 0),
+};
+
+static const struct mtmips_pmx_func uart0_grp[] = {
+	FUNC("-", 3),
+	FUNC("-", 2),
+	FUNC("gpio", 1),
+	FUNC("uart0", 0),
+};
+
+static const struct mtmips_pmx_func i2s_grp[] = {
+	FUNC("antenna", 3),
+	FUNC("pcm", 2),
+	FUNC("gpio", 1),
+	FUNC("i2s", 0),
+};
+
+static const struct mtmips_pmx_func spi_cs1_grp[] = {
+	FUNC("-", 3),
+	FUNC("refclk", 2),
+	FUNC("gpio", 1),
+	FUNC("spi cs1", 0),
+};
+
+static const struct mtmips_pmx_func spis_grp[] = {
+	FUNC("pwm_uart2", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("spis", 0),
+};
+
+static const struct mtmips_pmx_func gpio0_grp[] = {
+	FUNC("perst", 3),
+	FUNC("refclk", 2),
+	FUNC("gpio", 1),
+	FUNC("gpio0", 0),
+};
+
+static const struct mtmips_pmx_func wled_a_grp[] = {
+	FUNC("-", 3),
+	FUNC("-", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p0led_a_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("rsvd", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p1led_a_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p2led_a_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p3led_a_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p4led_a_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func wled_k_grp[] = {
+	FUNC("-", 3),
+	FUNC("-", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p0led_k_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("rsvd", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p1led_k_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p2led_k_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p3led_k_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_func p4led_k_grp[] = {
+	FUNC("jtag", 3),
+	FUNC("utif", 2),
+	FUNC("gpio", 1),
+	FUNC("led", 0),
+};
+
+static const struct mtmips_pmx_group mt7628_pinmux_data[] = {
+	GRP("ephy4_1_pad", ephy4_1_pad_grp, AGPIO_OFS, EPHY4_1_PAD_SHIFT,
+	    EPHY4_1_PAD_MASK),
+	GRP("ephy0", ephy0_grp, AGPIO_OFS, EPHY0_SHIFT, 1),
+	GRP("rf_olt", rf_olt_grp, AGPIO_OFS, RF_OLT_MODE_SHIFT, 1),
+	GRP("n9_eint_src", n9_eint_src_grp, AGPIO_OFS, N9_EINT_SRC_SHIFT, 1),
+	GRP("wlen_od", wlen_od_grp, AGPIO_OFS, WLED_OD_SHIFT, 1),
+	GRP("ref_clko_pad", ref_clko_grp, AGPIO_OFS, REF_CLKO_PAD_SHIFT, 1),
+	GRP("i2s_clk_pad", i2s_clk_grp, AGPIO_OFS, I2S_CLK_PAD_SHIFT, 1),
+	GRP("i2s_ws_pad", i2s_ws_grp, AGPIO_OFS, I2S_WS_PAD_SHIFT, 1),
+	GRP("i2s_sdo_pad", i2s_sdo_grp, AGPIO_OFS, I2S_SDO_PAD_SHIFT, 1),
+	GRP("i2s_sdi_pad", i2s_sdi_grp, AGPIO_OFS, I2S_SDI_PAD_SHIFT, 1),
+	GRP("pwm1", pwm1_grp, GPIOMODE1_OFS, PWM1_SHIFT, GM4_MASK),
+	GRP("pwm0", pwm0_grp, GPIOMODE1_OFS, PWM0_SHIFT, GM4_MASK),
+	GRP("uart2", uart2_grp, GPIOMODE1_OFS, UART2_SHIFT, GM4_MASK),
+	GRP("uart1", uart1_grp, GPIOMODE1_OFS, UART1_SHIFT, GM4_MASK),
+	GRP("i2c", i2c_grp, GPIOMODE1_OFS, I2C_SHIFT, GM4_MASK),
+	GRP("refclk", refclk_grp, GPIOMODE1_OFS, REFCLK_SHIFT, 1),
+	GRP("perst", perst_grp, GPIOMODE1_OFS, PERST_SHIFT, 1),
+	GRP("sd router", esd_grp, GPIOMODE1_OFS, ESD_SHIFT, 1),
+	GRP("wdt", wdt_grp, GPIOMODE1_OFS, WDT_SHIFT, 1),
+	GRP("spi", spi_grp, GPIOMODE1_OFS, SPI_SHIFT, 1),
+	GRP("sdmode", sd_mode_grp, GPIOMODE1_OFS, SDMODE_SHIFT, GM4_MASK),
+	GRP("uart0", uart0_grp, GPIOMODE1_OFS, UART0_SHIFT, GM4_MASK),
+	GRP("i2s", i2s_grp, GPIOMODE1_OFS, I2S_SHIFT, GM4_MASK),
+	GRP("spi cs1", spi_cs1_grp, GPIOMODE1_OFS, SPI_CS1_SHIFT, GM4_MASK),
+	GRP("spis", spis_grp, GPIOMODE1_OFS, SPIS_SHIFT, GM4_MASK),
+	GRP("gpio0", gpio0_grp, GPIOMODE1_OFS, GPIO0_SHIFT, GM4_MASK),
+	GRP("wled_a", wled_a_grp, GPIOMODE2_OFS, WLED_A_SHIFT, GM4_MASK),
+	GRP("p0led_a", p0led_a_grp, GPIOMODE2_OFS, P0LED_A_SHIFT, GM4_MASK),
+	GRP("p1led_a", p1led_a_grp, GPIOMODE2_OFS, P1LED_A_SHIFT, GM4_MASK),
+	GRP("p2led_a", p2led_a_grp, GPIOMODE2_OFS, P2LED_A_SHIFT, GM4_MASK),
+	GRP("p3led_a", p3led_a_grp, GPIOMODE2_OFS, P3LED_A_SHIFT, GM4_MASK),
+	GRP("p4led_a", p4led_a_grp, GPIOMODE2_OFS, P4LED_A_SHIFT, GM4_MASK),
+	GRP("wled_k", wled_k_grp, GPIOMODE2_OFS, WLED_K_SHIFT, GM4_MASK),
+	GRP("p0led_k", p0led_k_grp, GPIOMODE2_OFS, P0LED_K_SHIFT, GM4_MASK),
+	GRP("p1led_k", p1led_k_grp, GPIOMODE2_OFS, P1LED_K_SHIFT, GM4_MASK),
+	GRP("p2led_k", p2led_k_grp, GPIOMODE2_OFS, P2LED_K_SHIFT, GM4_MASK),
+	GRP("p3led_k", p3led_k_grp, GPIOMODE2_OFS, P3LED_K_SHIFT, GM4_MASK),
+	GRP("p4led_k", p4led_k_grp, GPIOMODE2_OFS, P4LED_K_SHIFT, GM4_MASK),
+};
+
+static int mt7628_get_groups_count(struct udevice *dev)
+{
+	return ARRAY_SIZE(mt7628_pinmux_data);
+}
+
+static const char *mt7628_get_group_name(struct udevice *dev,
+					 unsigned int selector)
+{
+	return mt7628_pinmux_data[selector].name;
+}
+#endif /* CONFIG_IS_ENABLED(PINMUX) */
+
+#if CONFIG_IS_ENABLED(PINCONF)
+static const struct pinconf_param mt7628_conf_params[] = {
+	{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
+	{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
+	{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
+	{ "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 },
+	{ "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 },
+	{ "drive-strength-28", PIN_CONFIG_DRIVE_STRENGTH_28, 0 },
+	{ "drive-strength-4g", PIN_CONFIG_DRIVE_STRENGTH_4G, 0 },
+	{ "slew-rate", PIN_CONFIG_SLEW_RATE, 0 },
+};
+
+static const char *const mt7628_pins[] = {
+	"i2s_sdi",
+	"i2s_sdo",
+	"i2s_ws",
+	"i2s_clk",
+	"i2s_sclk",
+	"i2c_sd",
+	"spi_cs1",
+	"spi_clk",
+	"spi_mosi",
+	"spi_miso",
+	"spi_cs0",
+	"gpio0",
+	"uart0_txd",
+	"uart0_rxd",
+	"spis_cs",
+	"spis_clk",
+	"spis_miso",
+	"spis_mosi",
+	"pwm_ch0",
+	"pwm_ch1",
+	"uart2_txd",
+	"uart2_rxd",
+	"sd_wp",
+	"sd_cd",
+	"sd_d1",
+	"sd_d0",
+	"sd_clk",
+	"sd_cmd",
+	"sd_d3",
+	"sd_d2",
+	"ephy_led4_k",
+	"ephy_led3_k",
+	"ephy_led2_k",
+	"ephy_led1_k",
+	"ephy_led0_k",
+	"wled_k",
+	"perst_n",
+	"co_clko",
+	"wdt",
+	"ephy_led4_a",
+	"ephy_led3_a",
+	"ephy_led2_a",
+	"ephy_led1_a",
+	"ephy_led0_a",
+	"wled_a",
+	"uart1_txd",
+	"uart1_rxd",
+};
+
+static const u32 mt7628_drv_strength_28_tbl[] = {2, 4, 6, 8};
+static const u32 mt7628_drv_strength_4g_tbl[] = {4, 8, 12, 16};
+
+static int mt7628_set_drv_strength(void __iomem *base, u32 val, u32 bit,
+				   const u32 tbl[], u32 reg_lo, u32 reg_hi)
+{
+	int i;
+
+	for (i = 0; i < 4; i++)
+		if (tbl[i] == val)
+			break;
+
+	if (i >= 4)
+		return -EINVAL;
+
+	clrsetbits_32(base + reg_lo, BIT(bit), (i & 1) << bit);
+	clrsetbits_32(base + reg_hi, BIT(bit), ((i >> 1) & 1) << bit);
+
+	return 0;
+}
+
+static int mt7628_get_pins_count(struct udevice *dev)
+{
+	return ARRAY_SIZE(mt7628_pins);
+}
+
+static const char *mt7628_get_pin_name(struct udevice *dev,
+				       unsigned int selector)
+{
+	return mt7628_pins[selector];
+}
+
+static int mt7628_pinconf_set(struct udevice *dev, unsigned int pin_selector,
+			      unsigned int param, unsigned int argument)
+{
+	struct mt7628_pinctrl_priv *priv = dev_get_priv(dev);
+	u32 offs, bit;
+	int ret = 0;
+
+	offs = (pin_selector / 32) * 4;
+	bit = pin_selector % 32;
+
+	switch (param) {
+	case PIN_CONFIG_BIAS_DISABLE:
+		clrbits_32(priv->pcbase + offs + PAD_PU_G0_REG, BIT(bit));
+		clrbits_32(priv->pcbase + offs + PAD_PD_G0_REG, BIT(bit));
+		break;
+	case PIN_CONFIG_BIAS_PULL_UP:
+		setbits_32(priv->pcbase + offs + PAD_PU_G0_REG, BIT(bit));
+		clrbits_32(priv->pcbase + offs + PAD_PD_G0_REG, BIT(bit));
+		break;
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		clrbits_32(priv->pcbase + offs + PAD_PU_G0_REG, BIT(bit));
+		setbits_32(priv->pcbase + offs + PAD_PD_G0_REG, BIT(bit));
+		break;
+	case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+		clrsetbits_32(priv->pcbase + offs + PAD_SMT_G0_REG,
+			      BIT(bit), (!!argument) << bit);
+		break;
+	case PIN_CONFIG_DRIVE_STRENGTH_28:
+		ret = mt7628_set_drv_strength(priv->pcbase + offs, argument,
+					      bit, mt7628_drv_strength_28_tbl,
+					      PAD_E2_G0_REG, PAD_E4_G0_REG);
+		break;
+	case PIN_CONFIG_DRIVE_STRENGTH_4G:
+		ret = mt7628_set_drv_strength(priv->pcbase + offs, argument,
+					      bit, mt7628_drv_strength_4g_tbl,
+					      PAD_E4_G0_REG, PAD_E8_G0_REG);
+		break;
+	case PIN_CONFIG_SLEW_RATE:
+		clrsetbits_32(priv->pcbase + offs + PAD_SR_G0_REG,
+			      BIT(bit), (!!argument) << bit);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+#endif
+
+static int mt7628_pinctrl_probe(struct udevice *dev)
+{
+	struct mt7628_pinctrl_priv *priv = dev_get_priv(dev);
+	int ret = 0;
+
+#if CONFIG_IS_ENABLED(PINMUX)
+	ret = mtmips_pinctrl_probe(&priv->mp, ARRAY_SIZE(mt7628_pinmux_data),
+				   mt7628_pinmux_data);
+#endif /* CONFIG_IS_ENABLED(PINMUX) */
+
+	return ret;
+}
+
+static int mt7628_pinctrl_ofdata_to_platdata(struct udevice *dev)
+{
+	struct mt7628_pinctrl_priv *priv = dev_get_priv(dev);
+
+	priv->mp.base = (void __iomem *)dev_remap_addr_index(dev, 0);
+
+	if (!priv->mp.base)
+		return -EINVAL;
+
+	priv->pcbase = (void __iomem *)dev_remap_addr_index(dev, 1);
+
+	if (!priv->pcbase)
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct pinctrl_ops mt7628_pinctrl_ops = {
+#if CONFIG_IS_ENABLED(PINMUX)
+	.get_groups_count = mt7628_get_groups_count,
+	.get_group_name = mt7628_get_group_name,
+	.get_functions_count = mtmips_get_functions_count,
+	.get_function_name = mtmips_get_function_name,
+	.pinmux_group_set = mtmips_pinmux_group_set,
+#endif /* CONFIG_IS_ENABLED(PINMUX) */
+#if CONFIG_IS_ENABLED(PINCONF)
+	.pinconf_num_params = ARRAY_SIZE(mt7628_conf_params),
+	.pinconf_params = mt7628_conf_params,
+	.get_pins_count = mt7628_get_pins_count,
+	.get_pin_name = mt7628_get_pin_name,
+	.pinconf_set = mt7628_pinconf_set,
+#endif /* CONFIG_IS_ENABLED(PINCONF) */
+	.set_state = pinctrl_generic_set_state,
+};
+
+static const struct udevice_id mt7628_pinctrl_ids[] = {
+	{ .compatible = "mediatek,mt7628-pinctrl" },
+	{ }
+};
+
+U_BOOT_DRIVER(mt7628_pinctrl) = {
+	.name = "mt7628-pinctrl",
+	.id = UCLASS_PINCTRL,
+	.of_match = mt7628_pinctrl_ids,
+	.ofdata_to_platdata = mt7628_pinctrl_ofdata_to_platdata,
+	.ops = &mt7628_pinctrl_ops,
+	.probe = mt7628_pinctrl_probe,
+	.priv_auto_alloc_size = sizeof(struct mt7628_pinctrl_priv),
+};
diff --git a/drivers/pinctrl/mtmips/pinctrl-mtmips-common.c b/drivers/pinctrl/mtmips/pinctrl-mtmips-common.c
new file mode 100644
index 00000000000..ee6a9d1fc80
--- /dev/null
+++ b/drivers/pinctrl/mtmips/pinctrl-mtmips-common.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/pinctrl.h>
+#include <linux/io.h>
+
+#include "pinctrl-mtmips-common.h"
+
+static void mtmips_pinctrl_reg_set(struct mtmips_pinctrl_priv *priv,
+				   u32 reg, u32 shift, u32 mask, u32 value)
+{
+	u32 val;
+
+	val = readl(priv->base + reg);
+	val &= ~(mask << shift);
+	val |= value << shift;
+	writel(val, priv->base + reg);
+}
+
+int mtmips_get_functions_count(struct udevice *dev)
+{
+	struct mtmips_pinctrl_priv *priv = dev_get_priv(dev);
+
+	return priv->nfuncs;
+}
+
+const char *mtmips_get_function_name(struct udevice *dev, unsigned int selector)
+{
+	struct mtmips_pinctrl_priv *priv = dev_get_priv(dev);
+
+	return priv->funcs[selector]->name;
+}
+
+int mtmips_pinmux_group_set(struct udevice *dev, unsigned int group_selector,
+			    unsigned int func_selector)
+{
+	struct mtmips_pinctrl_priv *priv = dev_get_priv(dev);
+	const struct mtmips_pmx_group *grp = &priv->groups[group_selector];
+	const struct mtmips_pmx_func *func = priv->funcs[func_selector];
+	int i;
+
+	if (!grp->nfuncs)
+		return 0;
+
+	for (i = 0; i < grp->nfuncs; i++) {
+		if (!strcmp(grp->funcs[i].name, func->name)) {
+			mtmips_pinctrl_reg_set(priv, grp->reg, grp->shift,
+					       grp->mask, grp->funcs[i].value);
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+int mtmips_pinctrl_probe(struct mtmips_pinctrl_priv *priv, u32 ngroups,
+			 const struct mtmips_pmx_group *groups)
+{
+	int i, j, n;
+
+	priv->ngroups = ngroups;
+	priv->groups = groups;
+
+	priv->nfuncs = 0;
+
+	for (i = 0; i < ngroups; i++)
+		priv->nfuncs += groups[i].nfuncs;
+
+	priv->funcs = malloc(priv->nfuncs * sizeof(*priv->funcs));
+	if (!priv->funcs)
+		return -ENOMEM;
+
+	n = 0;
+
+	for (i = 0; i < ngroups; i++) {
+		for (j = 0; j < groups[i].nfuncs; j++)
+			priv->funcs[n++] = &groups[i].funcs[j];
+	}
+
+	return 0;
+}
diff --git a/drivers/pinctrl/mtmips/pinctrl-mtmips-common.h b/drivers/pinctrl/mtmips/pinctrl-mtmips-common.h
new file mode 100644
index 00000000000..b51d8f009c0
--- /dev/null
+++ b/drivers/pinctrl/mtmips/pinctrl-mtmips-common.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
+ */
+
+#ifndef _PINCTRL_MTMIPS_COMMON_H_
+#define _PINCTRL_MTMIPS_COMMON_H_
+
+#include <common.h>
+
+struct mtmips_pmx_func {
+	const char *name;
+	int value;
+};
+
+struct mtmips_pmx_group {
+	const char *name;
+
+	u32 reg;
+	u32 shift;
+	char mask;
+
+	int nfuncs;
+	const struct mtmips_pmx_func *funcs;
+};
+
+struct mtmips_pinctrl_priv {
+	void __iomem *base;
+
+	u32 ngroups;
+	const struct mtmips_pmx_group *groups;
+
+	u32 nfuncs;
+	const struct mtmips_pmx_func **funcs;
+};
+
+#define FUNC(name, value)	{ name, value }
+
+#define GRP(_name, _funcs, _reg, _shift, _mask) \
+	{ .name = (_name), .reg = (_reg), .shift = (_shift), .mask = (_mask), \
+	  .funcs = (_funcs), .nfuncs = ARRAY_SIZE(_funcs) }
+
+int mtmips_get_functions_count(struct udevice *dev);
+const char *mtmips_get_function_name(struct udevice *dev,
+				     unsigned int selector);
+int mtmips_pinmux_group_set(struct udevice *dev, unsigned int group_selector,
+			    unsigned int func_selector);
+int mtmips_pinctrl_probe(struct mtmips_pinctrl_priv *priv, u32 ngroups,
+			 const struct mtmips_pmx_group *groups);
+
+#endif /* _PINCTRL_MTMIPS_COMMON_H_ */