diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 8b99a13669bf..1cc40217f798 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -2166,5 +2166,15 @@ config MFD_INTEL_M10_BMC
 	  additional drivers must be enabled in order to use the functionality
 	  of the device.
 
+config MFD_AHC1EC0
+	tristate "Advantech Embedded Controller Module"
+	depends on X86
+	select MFD_CORE
+	help
+	  This is the core function that for Advantech EC drivers. It
+	  includes the sub-devices such as hwmon, watchdog, etc. And also
+	  provides expose functions for sub-devices to read/write the value
+	  to embedded controller.
+
 endmenu
 endif
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 1780019d2474..80a9a2bdc3ba 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -267,3 +267,5 @@ obj-$(CONFIG_MFD_KHADAS_MCU) 	+= khadas-mcu.o
 obj-$(CONFIG_SGI_MFD_IOC3)	+= ioc3.o
 obj-$(CONFIG_MFD_SIMPLE_MFD_I2C)	+= simple-mfd-i2c.o
 obj-$(CONFIG_MFD_INTEL_M10_BMC)   += intel-m10-bmc.o
+
+obj-$(CONFIG_MFD_AHC1EC0)	+= ahc1ec0.o
diff --git a/drivers/mfd/ahc1ec0.c b/drivers/mfd/ahc1ec0.c
new file mode 100644
index 000000000000..768d2063bed1
--- /dev/null
+++ b/drivers/mfd/ahc1ec0.c
@@ -0,0 +1,1405 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Base driver for Advantech controlling EC chip AHC1EC0
+ *
+ * Copyright (C) 2020, Advantech Automation Corp.
+ *
+ * Change Log:
+ *              Version 1.00 <10/10/2014> Sun.Lang
+ *              - Initial version
+ *              Version 1.01 <11/05/2015> Jiangwei.Zhu
+ *              - Modify read_ad_value() function.
+ *              - Add smbus_read_byte() function.
+ *              - Add smbus_write_byte() function.
+ *              - Add wait_smbus_protocol_finish() function.
+ *              Version 1.02 <03/04/2016> Jiangwei.Zhu
+ *              - Add smbus_read_word() function.
+ *              Version 1.03 <01/22/2017> Ji.Xu
+ *              - Add detect to Advantech porduct name "ECU".
+ *              Version 1.04 <09/20/2017> Ji.Xu
+ *              - Update to support detect Advantech product name in UEFI
+ *                BIOS(DMI).
+ *              Version 1.05 <11/02/2017> Ji.Xu
+ *              - Fixed issue: Cache coherency error when exec 'ioremap_uncache()'
+ *                in kernel-4.10.
+ *              Version 2.00 <11/04/2020> Shihlun.Lin
+ *              - Update: Replace ioremap_nocache() with ioremap_uc() since
+ *                ioremap_uc() was used on the entire PCI BAR.
+ */
+
+#include <linux/kconfig.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/wait.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/mfd/ahc1ec0.h>
+#include <linux/acpi.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mfd/core.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#define ADVANTECH_EC_NAME      "ahc1ec0"
+#define ADVANTECH_EC_MFD_VER    "2.0.0"
+#define ADVANTECH_EC_MFD_DATE   "11/04/2020"
+
+struct mutex lock;
+
+enum {
+	ADVEC_SUBDEV_BRIGHTNESS = 0,
+	ADVEC_SUBDEV_EEPROM,
+	ADVEC_SUBDEV_GPIO,
+	ADVEC_SUBDEV_HWMON,
+	ADVEC_SUBDEV_LED,
+	ADVEC_SUBDEV_WDT,
+	ADVEC_SUBDEV_MAX,
+};
+
+static int wait_ibf(void)
+{
+	int i;
+
+	for (i = 0; i < EC_MAX_TIMEOUT_COUNT; i++) {
+		if ((inb(EC_COMMAND_PORT) & 0x02) == 0)
+			return 0;
+
+		udelay(EC_UDELAY_TIME);
+	}
+
+	return -ETIMEDOUT;
+}
+
+/* Wait OBF (Output buffer full) set */
+static int wait_obf(void)
+{
+	int i;
+
+	for (i = 0; i < EC_MAX_TIMEOUT_COUNT; i++) {
+		if ((inb(EC_COMMAND_PORT) & 0x01) != 0)
+			return 0;
+
+		udelay(EC_UDELAY_TIME);
+	}
+
+	return -ETIMEDOUT;
+}
+
+/* Read data from EC HW ram */
+static int read_hw_ram(uchar addr, uchar *data)
+{
+	int ret;
+
+	mutex_lock(&lock);
+
+	/* Step 0. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 1. Send "read EC HW ram" command to EC Command port */
+	outb(EC_HW_RAM_READ, EC_COMMAND_PORT);
+
+	/* Step 2. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 3. Send "EC HW ram" address to EC Data port */
+	outb(addr, EC_STATUS_PORT);
+
+	/* Step 4. Wait OBF set */
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	/* Step 5. Get "EC HW ram" data from EC Data port */
+	*data = inb(EC_STATUS_PORT);
+
+	mutex_unlock(&lock);
+
+	return ret;
+
+error:
+	mutex_unlock(&lock);
+	pr_err("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+/* Write data to EC HW ram */
+int write_hw_ram(uchar addr, uchar data)
+{
+	int ret;
+
+	mutex_lock(&lock);
+	/* Step 0. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 1. Send "write EC HW ram" command to EC command port */
+	outb(EC_HW_RAM_WRITE, EC_COMMAND_PORT);
+
+	/* Step 2. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 3. Send "EC HW ram" address to EC Data port */
+	outb(addr, EC_STATUS_PORT);
+
+	/* Step 4. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 5. Send "EC HW ram" data to EC Data port */
+	outb(data, EC_STATUS_PORT);
+
+	mutex_unlock(&lock);
+
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_err("%s: Wait for IBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(write_hw_ram);
+
+static int wait_smbus_protocol_finish(void)
+{
+	uchar addr, data;
+	int retry = 1000;
+
+	do {
+		addr = EC_SMBUS_PROTOCOL;
+		data = 0xFF;
+		if (!read_hw_ram(addr, &data))
+			return 0;
+
+		if (data == 0)
+			return 0;
+
+		udelay(EC_UDELAY_TIME);
+	} while (retry-- > 0);
+
+	return -ETIMEDOUT;
+}
+
+/* Get dynamic control table */
+static int adv_get_dynamic_tab(struct adv_ec_platform_data *pdata)
+{
+	int i, ret;
+	uchar pin_tmp, device_id;
+
+	mutex_lock(&lock);
+
+	for (i = 0; i < EC_MAX_TBL_NUM; i++) {
+		pdata->dym_tbl[i].DeviceID = 0xff;
+		pdata->dym_tbl[i].HWPinNumber = 0xff;
+	}
+
+	for (i = 0; i < EC_MAX_TBL_NUM; i++) {
+		/* Step 0. Wait IBF clear */
+		ret = wait_ibf();
+		if (ret)
+			goto error;
+
+		/*
+		 *  Step 1. Write 0x20 to 0x29A
+		 *  Send write item number into index command
+		 */
+		outb(EC_TBL_WRITE_ITEM, EC_COMMAND_PORT);
+
+		/* Step 2. Wait IBF clear */
+		ret = wait_ibf();
+		if (ret)
+			goto error;
+
+		/*
+		 *  Step 3. Write item number to 0x299
+		 *  Write item number to index. Item number is limited in range 0 to 31
+		 */
+		outb(i, EC_STATUS_PORT);
+
+		/* Step 4. Wait OBF set */
+		ret = wait_obf();
+		if (ret)
+			goto error;
+
+		/*
+		 *  Step 5. Read 0x299 port
+		 *  If item is defined, EC will return item number.
+		 *  If table item is not defined, EC will return 0xFF.
+		 */
+		if (inb(EC_STATUS_PORT) == 0xff) {
+			mutex_unlock(&lock);
+			return -EINVAL;
+		}
+
+		/* Step 6. Wait IBF clear */
+		ret = wait_ibf();
+		if (ret)
+			goto error;
+
+		/*
+		 *  Step 7. Write 0x21 to 0x29A
+		 *  Send read HW pin number command
+		 */
+		outb(EC_TBL_GET_PIN, EC_COMMAND_PORT);
+
+		/* Step 8. Wait OBF set */
+		ret = wait_obf();
+		if (ret)
+			goto error;
+
+		/*
+		 *  Step 9. Read 0x299 port
+		 *  EC will return current item HW pin number
+		 */
+		pin_tmp = inb(EC_STATUS_PORT) & 0xff;
+
+		/* Step 10. Wait IBF clear */
+		ret = wait_ibf();
+		if (ret)
+			goto error;
+
+		if (pin_tmp == 0xff) {
+			mutex_unlock(&lock);
+			return -EINVAL;
+		}
+
+		/*
+		 *  Step 11. Write 0x22 to 0x29A
+		 *  Send read device id command
+		 */
+		outb(EC_TBL_GET_DEVID, EC_COMMAND_PORT);
+
+		/* Step 12. Wait OBF set */
+		ret = wait_obf();
+		if (ret)
+			goto error;
+
+		/*
+		 *  Step 13. Read 0x299 port
+		 *  EC will return current item Device ID
+		 */
+		device_id = inb(EC_STATUS_PORT) & 0xff;
+
+		/* Step 14. Save data to a database */
+		pdata->dym_tbl[i].DeviceID = device_id;
+		pdata->dym_tbl[i].HWPinNumber = pin_tmp;
+	}
+
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_err("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+int read_ad_value(uchar hwpin, uchar multi)
+{
+	int ret;
+	u32 ret_val;
+	uchar LSB, MSB;
+
+	mutex_lock(&lock);
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_AD_INDEX_WRITE, EC_COMMAND_PORT);
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(hwpin, EC_STATUS_PORT);
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	if (inb(EC_STATUS_PORT) == 0xff) {
+		mutex_unlock(&lock);
+		return -1;
+	}
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_AD_LSB_READ, EC_COMMAND_PORT);
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	LSB = inb(EC_STATUS_PORT);
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_AD_MSB_READ, EC_COMMAND_PORT);
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	MSB = inb(EC_STATUS_PORT);
+	ret_val = ((MSB << 8) | LSB) & 0x03FF;
+	ret_val = ret_val * multi * 100;
+
+	mutex_unlock(&lock);
+	return ret_val;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(read_ad_value);
+
+int read_acpi_value(uchar addr, uchar *pvalue)
+{
+	int ret;
+	uchar value;
+
+	mutex_lock(&lock);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_ACPI_RAM_READ, EC_COMMAND_PORT);
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(addr, EC_STATUS_PORT);
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	value = inb(EC_STATUS_PORT);
+	*pvalue = value;
+	mutex_unlock(&lock);
+
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(read_acpi_value);
+
+int write_acpi_value(uchar addr, uchar value)
+{
+	int ret;
+
+	mutex_lock(&lock);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_ACPI_DATA_WRITE, EC_COMMAND_PORT);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(addr, EC_STATUS_PORT);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(value, EC_STATUS_PORT);
+
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF  too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+int read_gpio_status(uchar PinNumber, uchar *pvalue)
+{
+	int ret;
+
+	uchar gpio_status_value;
+
+	mutex_lock(&lock);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_GPIO_INDEX_WRITE, EC_COMMAND_PORT);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(PinNumber, EC_STATUS_PORT);
+
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	if (inb(EC_STATUS_PORT) == 0xff) {
+		pr_err("%s: Read Pin Number error!!", __func__);
+		mutex_unlock(&lock);
+		return -1;
+	}
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_GPIO_STATUS_READ, EC_COMMAND_PORT);
+
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	gpio_status_value = inb(EC_STATUS_PORT);
+	*pvalue = gpio_status_value;
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+int write_gpio_status(uchar PinNumber, uchar value)
+{
+	int ret;
+
+	mutex_lock(&lock);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_GPIO_INDEX_WRITE, EC_COMMAND_PORT);
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(PinNumber, EC_STATUS_PORT);
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	if (inb(EC_STATUS_PORT) == 0xff) {
+		pr_err("%s: Read Pin Number error!!", __func__);
+		mutex_unlock(&lock);
+		return -1;
+	}
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_GPIO_STATUS_WRITE, EC_COMMAND_PORT);
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(value, EC_STATUS_PORT);
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+int read_gpio_dir(uchar PinNumber, uchar *pvalue)
+{
+	int ret;
+	uchar gpio_dir_value;
+
+	mutex_lock(&lock);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_GPIO_INDEX_WRITE, EC_COMMAND_PORT);
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(PinNumber, EC_STATUS_PORT);
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	if (inb(EC_STATUS_PORT) == 0xff) {
+		pr_err("%s: Read Pin Number error!!", __func__);
+		mutex_unlock(&lock);
+		return -1;
+	}
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_GPIO_DIR_READ, EC_COMMAND_PORT);
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	gpio_dir_value = inb(EC_STATUS_PORT);
+	*pvalue = gpio_dir_value;
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+int write_gpio_dir(uchar PinNumber, uchar value)
+{
+	int ret;
+
+	mutex_lock(&lock);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_GPIO_INDEX_WRITE, EC_COMMAND_PORT);
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(PinNumber, EC_STATUS_PORT);
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	if (inb(EC_STATUS_PORT) == 0xff) {
+		pr_err("%s: Read Pin Number error!!", __func__);
+		mutex_unlock(&lock);
+		return -1;
+	}
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(EC_GPIO_DIR_WRITE, EC_COMMAND_PORT);
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(value, EC_STATUS_PORT);
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+/* Write data to EC HW ram */
+int write_hw_extend_ram(uchar addr, uchar data)
+{
+	int ret;
+
+	mutex_lock(&lock);
+	/* Step 0. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 1. Send "write EC HW ram" command to EC command port */
+	outb(EC_HW_EXTEND_RAM_WRITE, EC_COMMAND_PORT);
+
+	/* Step 2. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 3. Send "EC HW ram" address to EC Data port */
+	outb(addr, EC_STATUS_PORT);
+
+	/* Step 4. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 5. Send "EC HW ram" data to EC Data port */
+	outb(data, EC_STATUS_PORT);
+
+	mutex_unlock(&lock);
+
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_debug("%s: Wait for IBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+int write_hwram_command(uchar data)
+{
+	int ret;
+
+	mutex_lock(&lock);
+
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	outb(data, EC_COMMAND_PORT);
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_debug("%s: Wait for IBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(write_hwram_command);
+
+int smbus_read_word(struct EC_SMBUS_WORD_DATA *ptr_ec_smbus_word_data)
+{
+	int ret;
+
+	uchar sm_ready, LSB, MSB, addr, data;
+	unsigned short Value = 0;
+
+	/*  Step 1. Select SMBus channel */
+	addr = EC_SMBUS_CHANNEL;
+	data = ptr_ec_smbus_word_data->Channel;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Select SMBus channel Failed");
+		goto error;
+	}
+
+	/* Step 2. Set SMBUS device address EX: 0x98 */
+	addr = EC_SMBUS_SLV_ADDR;
+	data = (ptr_ec_smbus_word_data->Address);
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Select SMBus dev addr:0x%02X Failed", ptr_ec_smbus_word_data->Address);
+		goto error;
+	}
+
+	/* Step 3. Set Chip (EX: INA266) Register Address */
+	addr = EC_SMBUS_CMD;
+	data = ptr_ec_smbus_word_data->Register;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Select Chip Register Addr:0x%02X Failed", ptr_ec_smbus_word_data->Register);
+		goto error;
+	}
+
+	/* Step 4. Set EC SMBUS read word Mode */
+	addr = EC_SMBUS_PROTOCOL;
+	data = SMBUS_WORD_READ;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Set EC SMBUS read Byte Mode Failed");
+		goto error;
+	}
+
+	/* Step 5. Check EC Smbus states */
+	ret = wait_smbus_protocol_finish();
+	if (ret) {
+		pr_err("Wait SmBus Protocol Finish Failed!!");
+		goto error;
+	}
+
+	addr = EC_SMBUS_STATUS;
+	ret = read_hw_ram(addr, &data);
+	if (ret) {
+		pr_err("Check EC Smbus states Failed");
+		goto error;
+	}
+	sm_ready = data;
+
+	/* check no error */
+	if (sm_ready != 0x80) {
+		pr_err("SMBUS ERR:0x%02X", sm_ready);
+		goto error;
+	}
+
+	/* Step 6. Get Value */
+	addr = EC_SMBUS_DAT_OFFSET(0);
+	ret = read_hw_ram(addr, &data);
+	if (ret) {
+		pr_err("Get Value Failed");
+		goto error;
+	}
+	MSB = data;
+
+	addr = EC_SMBUS_DAT_OFFSET(1);
+	ret = read_hw_ram(addr, &data);
+	if (ret) {
+		pr_err("Get Value Failed");
+		goto error;
+	}
+	LSB = data;
+
+	Value = (MSB << 8) | LSB;
+	ptr_ec_smbus_word_data->Value = Value;
+
+	return 0;
+
+error:
+	pr_err("%s: Exception!", __func__);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(smbus_read_word);
+
+int smbus_read_byte(struct EC_SMBUS_READ_BYTE *ptr_ec_smbus_read_byte)
+{
+	int ret;
+	uchar sm_ready, addr, data;
+
+	/* CHECK_PARAMETER */
+	if (ptr_ec_smbus_read_byte == NULL)
+		return -EINVAL;
+
+	/* Step 1. Select SMBus channel */
+	addr = EC_SMBUS_CHANNEL;
+	data = ptr_ec_smbus_read_byte->Channel;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Select SMBus channel Failed");
+		goto error;
+	}
+
+	/* Step 2. Set SMBUS device address EX: 0x98 */
+	addr = EC_SMBUS_SLV_ADDR;
+	data = (ptr_ec_smbus_read_byte->Address);
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Select SMBus dev addr:0x%02X Failed", ptr_ec_smbus_read_byte->Address);
+		goto error;
+	}
+
+	/* Step 3. Set Chip (EX: MCP23008) Register Address */
+	addr = EC_SMBUS_CMD;
+	data = ptr_ec_smbus_read_byte->Register;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Select Chip Register Addr:0x%02X Failed", ptr_ec_smbus_read_byte->Register);
+		goto error;
+	}
+
+	/* Step 4. Set EC SMBUS read Byte Mode */
+	addr = EC_SMBUS_PROTOCOL;
+	data = SMBUS_BYTE_READ;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Set EC SMBUS read Byte Mode Failed");
+		goto error;
+	}
+
+	/* Step 5. Check EC Smbus states */
+	ret = wait_smbus_protocol_finish();
+	if (ret) {
+		pr_err("Wait SmBus Protocol Finish Failed!!");
+		goto error;
+	}
+
+	addr = EC_SMBUS_STATUS;
+	ret = read_hw_ram(addr, &data);
+	if (ret) {
+		pr_err("Check EC Smbus states Failed");
+		goto error;
+	}
+	sm_ready = data;
+
+	/* check no error */
+	if (sm_ready != 0x80) {
+		pr_err("SMBUS ERR:(0x%02X)", sm_ready);
+		goto error;
+	}
+
+	/* Step 6. Get Value */
+	addr = EC_SMBUS_DATA;
+	ret = read_hw_ram(addr, &data);
+	if (ret) {
+		pr_err("Get Value Failed");
+		goto error;
+	}
+
+	ptr_ec_smbus_read_byte->Data = (data & 0xFF);
+	return 0;
+
+error:
+	pr_err("%s: Exception!", __func__);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(smbus_read_byte);
+
+int smbus_write_byte(struct EC_SMBUS_WRITE_BYTE *ptr_ec_smbus_write_byte)
+{
+	int ret;
+	uchar sm_ready, addr, data;
+
+	/* Step 1. Select SMBus channel */
+	addr = EC_SMBUS_CHANNEL;
+	data = ptr_ec_smbus_write_byte->Channel;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Select SMBus channel Failed");
+		goto error;
+	}
+
+	/* Step 2. Set SMBUS device address EX: 0x98 */
+	addr = EC_SMBUS_SLV_ADDR;
+	data = (ptr_ec_smbus_write_byte->Address);
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Select SMBus dev addr:0x%02X Failed", ptr_ec_smbus_write_byte->Address);
+		goto error;
+	}
+
+	/* Step 3. Set Chip (EX: MCP23008) Register Address */
+	addr = EC_SMBUS_CMD;
+	data = ptr_ec_smbus_write_byte->Register;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Select Chip reg addr:0x%02X Failed", ptr_ec_smbus_write_byte->Register);
+		goto error;
+	}
+
+	/* Step 4. Set Data to SMBUS */
+	addr = EC_SMBUS_DATA;
+	data = ptr_ec_smbus_write_byte->Data;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Set Data 0x%02X to SMBUS Failed", ptr_ec_smbus_write_byte->Data);
+		goto error;
+	}
+
+	/* Step 5. Set EC SMBUS write Byte Mode */
+	addr = EC_SMBUS_PROTOCOL;
+	data = SMBUS_BYTE_WRITE;
+	ret = write_hw_ram(addr, data);
+	if (ret) {
+		pr_err("Set EC SMBUS write Byte Mode Failed");
+		goto error;
+	}
+
+	/* Step 6. Check EC Smbus states */
+	ret = wait_smbus_protocol_finish();
+	if (ret) {
+		pr_err("Wait SmBus Protocol Finish Failed!!");
+		goto error;
+	}
+
+	addr = EC_SMBUS_STATUS;
+	ret = read_hw_ram(addr, &data);
+	if (ret) {
+		pr_err("Check EC Smbus states Failed");
+		goto error;
+	}
+	sm_ready = data;
+
+	/* check no error */
+	if (sm_ready != 0x80) {
+		pr_err("SMBUS ERR:(0x%02X)", sm_ready);
+		goto error;
+	}
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	pr_err("%s: Exception!", __func__);
+	mutex_unlock(&lock);
+	return ret;
+}
+
+/* Get One Key Recovery status */
+int read_onekey_status(uchar addr, uchar *pdata)
+{
+	int ret;
+
+	mutex_lock(&lock);
+
+	/* Init return value */
+	*pdata = 0;
+
+	/* Step 0. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 1. Send "One Key Recovery" command to EC Command port */
+	outb(EC_ONE_KEY_FLAG, EC_COMMAND_PORT);
+
+	/* Step 2. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 3. Send "One Key Recovery function" address to EC Data port */
+	outb(addr, EC_STATUS_PORT);
+
+	/* Step 4. Wait OBF set */
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	/* Step 5. Get "One Key Recovery function" data from EC Data port */
+	*pdata = inb(EC_STATUS_PORT);
+
+	pr_debug("%s: data= %d, line: %d", __func__, *pdata, __LINE__);
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+/* Set One Key Recovery status */
+int write_onekey_status(uchar addr)
+{
+	int ret;
+
+	mutex_lock(&lock);
+
+	/* Step 0. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 1. Send "One Key Recovery" command to EC Command port */
+	outb(EC_ONE_KEY_FLAG, EC_COMMAND_PORT);
+
+	/* Step 2. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 3. Send "One Key Recovery function" address to EC Data port */
+	outb(addr, EC_STATUS_PORT);
+
+	mutex_unlock(&lock);
+
+	pr_debug("%s: addr= %d, line: %d", __func__, addr, __LINE__);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_debug("%s: Wait for IBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+/* EC OEM get status */
+int ec_oem_get_status(uchar addr, uchar *pdata)
+{
+	int ret;
+
+	mutex_lock(&lock);
+
+	/* Init return value */
+	*pdata = 0;
+
+	/* Step 0. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 1. Send "ASG OEM" command to EC Command port */
+	outb(EC_ASG_OEM, EC_COMMAND_PORT);
+
+	/* Step 2. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 3. Send "ASG OEM STATUS READ" address to EC Data port */
+	outb(EC_ASG_OEM_READ, EC_STATUS_PORT);
+
+	/* Step 4. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 5. Send "OEM STATUS" address to EC Data port */
+	outb(addr, EC_STATUS_PORT);
+
+	/* Step 6. Wait OBF set */
+	ret = wait_obf();
+	if (ret)
+		goto error;
+
+	/* Step 7. Get "OEM STATUS" data from EC Data port */
+	*pdata = inb(EC_STATUS_PORT);
+
+	pr_debug("%s: data= %d, line: %d", __func__, *pdata, __LINE__);
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+	return ret;
+}
+
+/* EC OEM set status */
+int ec_oem_set_status(uchar addr, uchar pdata)
+{
+	int ret;
+
+	mutex_lock(&lock);
+
+	/* Step 0. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 1. Send "ASG OEM" command to EC Command port */
+	outb(EC_ASG_OEM, EC_COMMAND_PORT);
+
+	/* Step 2. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 3. Send "ASG OEM STATUS WRITE" address to EC Data port */
+	outb(EC_ASG_OEM_WRITE, EC_STATUS_PORT);
+
+	/* Step 4. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 5. Send "OEM STATUS" address to EC Data port */
+	outb(addr, EC_STATUS_PORT);
+
+	/* Step 6. Wait IBF clear */
+	ret = wait_ibf();
+	if (ret)
+		goto error;
+
+	/* Step 7. Send "OEM STATUS" status to EC Data port */
+	outb(pdata, EC_STATUS_PORT);
+
+	pr_debug("%s: data= %d, line: %d", __func__, pdata, __LINE__);
+	mutex_unlock(&lock);
+	return 0;
+
+error:
+	mutex_unlock(&lock);
+	pr_warn("%s: Wait for IBF or OBF too long. line: %d", __func__, __LINE__);
+
+	return ret;
+}
+
+static int adv_ec_get_productname(char *product)
+{
+	static unsigned char *uc_ptaddr;
+	static unsigned char *uc_epsaddr;
+	int index = 0, eps_table;
+	int i = 0;
+	int length = 0;
+	int type0_str = 0;
+	int type1_str = 0;
+	int is_advantech = 0;
+
+	uc_ptaddr = ioremap(AMI_UEFI_ADVANTECH_BOARD_NAME_ADDRESS,
+			AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH);
+	if (!uc_ptaddr) {
+		pr_err("Error: ioremap_uc()");
+		return -ENXIO;
+	}
+
+	/* Try to Read the product name from UEFI BIOS(DMI) EPS table */
+	for (index = 0; index < AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH; index++) {
+		if (uc_ptaddr[index] == '_'
+				&& uc_ptaddr[index+0x1] == 'S'
+				&& uc_ptaddr[index+0x2] == 'M'
+				&& uc_ptaddr[index+0x3] == '_'
+				&& uc_ptaddr[index+0x10] == '_'
+				&& uc_ptaddr[index+0x11] == 'D'
+				&& uc_ptaddr[index+0x12] == 'M'
+				&& uc_ptaddr[index+0x13] == 'I'
+				&& uc_ptaddr[index+0x14] == '_'
+				) {
+			eps_table = 1;
+			break;
+		}
+	}
+
+	/* If EPS table exist, read type1(system information) */
+	if (eps_table) {
+		uc_epsaddr =
+			(char *)ioremap(((unsigned int *)&uc_ptaddr[index+0x18])[0],
+			((unsigned short *)&uc_ptaddr[index+0x16])[0]);
+		if (!uc_epsaddr) {
+			uc_epsaddr =
+				(char *)ioremap_uc(((unsigned int *)&uc_ptaddr[index+0x18])[0],
+				((unsigned short *)&uc_ptaddr[index+0x16])[0]);
+			if (!uc_epsaddr) {
+				pr_err("Error: both ioremap() and ioremap_uc() exec failed!");
+				return -ENXIO;
+			}
+		}
+
+		type0_str = (int)uc_epsaddr[1];
+		for (i = type0_str; i < (type0_str+512); i++) {
+			if (uc_epsaddr[i] == 0 && uc_epsaddr[i+1] == 0 && uc_epsaddr[i+2] == 1) {
+				type1_str = i + uc_epsaddr[i+3];
+				break;
+			}
+		}
+		for (i = type1_str; i < (type1_str+512); i++) {
+			if (!strncmp(&uc_epsaddr[i], "Advantech", 9))
+				is_advantech = 1;
+
+			if (uc_epsaddr[i] == 0) {
+				i++;
+				type1_str = i;
+				break;
+			}
+		}
+		length = 2;
+		while ((uc_epsaddr[type1_str + length] != 0)
+				&& (length < AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH)) {
+			length += 1;
+		}
+		memmove(product, &uc_epsaddr[type1_str], length);
+		iounmap((void *)uc_epsaddr);
+		if (is_advantech) {
+			iounmap((void *)uc_ptaddr);
+			return 0;
+		}
+	}
+
+	/* It is an old BIOS, read from 0x000F0000 */
+	for (index = 0; index < (AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH - 3); index++) {
+		if (!strncmp(&uc_ptaddr[index], "TPC", 3)
+				|| !strncmp(&uc_ptaddr[index], "UNO", 3)
+				|| !strncmp(&uc_ptaddr[index], "ITA", 3)
+				|| !strncmp(&uc_ptaddr[index], "MIO", 3)
+				|| !strncmp(&uc_ptaddr[index], "ECU", 3)
+				|| !strncmp(&uc_ptaddr[index], "APAX", 4))
+			break;
+	}
+
+	if (index == (AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH - 3)) {
+		pr_err("%s: Can't find the product name, line: %d", __func__, __LINE__);
+		product[0] = '\0';
+		iounmap((void *)uc_ptaddr);
+		return -ENODATA;
+	}
+
+	/* Use char "Space" (ASCII code: 32) to check the end of the Product Name. */
+	for (i = 0; (uc_ptaddr[index+i] != 32) && (i < 31); i++)
+		product[i] = uc_ptaddr[index+i];
+
+	product[i] = '\0';
+	pr_info("%s: BIOS Product Name = %s, line: %d", __func__, product, __LINE__);
+
+	iounmap((void *)uc_ptaddr);
+
+	return 0;
+}
+
+static const struct mfd_cell adv_ec_sub_cells[] = {
+	{ .name = "adv-ec-brightness", },
+	{ .name = "adv-ec-eeprom", },
+	{ .name = "adv-ec-gpio", },
+	{ .name = "adv-ec-hwmon", },
+	{ .name = "adv-ec-led", },
+	{ .name = "adv-ec-wdt", },
+};
+
+static int adv_ec_init_ec_data(struct adv_ec_platform_data *pdata)
+{
+	int ret;
+
+	pdata->sub_dev_mask = 0;
+	pdata->sub_dev_nb = 0;
+	pdata->dym_tbl = NULL;
+	pdata->bios_product_name = NULL;
+
+	/* Get product name */
+	pdata->bios_product_name = kmalloc(AMI_ADVANTECH_BOARD_ID_LENGTH, GFP_KERNEL);
+	if (!pdata->bios_product_name)
+		return -ENOMEM;
+
+	memset(pdata->bios_product_name, 0, AMI_ADVANTECH_BOARD_ID_LENGTH);
+	ret = adv_ec_get_productname(pdata->bios_product_name);
+	if (ret)
+		return ret;
+
+	/* Get pin table */
+	pdata->dym_tbl = kmalloc(EC_MAX_TBL_NUM*sizeof(struct Dynamic_Tab), GFP_KERNEL);
+	if (!pdata->dym_tbl)
+		return -ENOMEM;
+
+	ret = adv_get_dynamic_tab(pdata);
+
+	return 0;
+}
+
+static int adv_ec_parse_prop(struct adv_ec_platform_data *pdata)
+{
+	int i, ret;
+	u32 nb, sub_dev[ADVEC_SUBDEV_MAX];
+
+	ret = device_property_read_u32(pdata->dev, "advantech,sub-dev-nb", &nb);
+	if (ret < 0) {
+		dev_err(pdata->dev, "get sub-dev-nb failed! (%d)", ret);
+		return ret;
+	}
+	pdata->sub_dev_nb = nb;
+
+	ret = device_property_read_u32_array(pdata->dev, "advantech,sub-dev", sub_dev, nb);
+	if (ret < 0) {
+		dev_err(pdata->dev, "get sub-dev failed! (%d)", ret);
+		return ret;
+	}
+
+	for (i = 0; i < nb; i++) {
+		switch (sub_dev[i]) {
+		case ADVEC_SUBDEV_BRIGHTNESS:
+		case ADVEC_SUBDEV_EEPROM:
+		case ADVEC_SUBDEV_GPIO:
+		case ADVEC_SUBDEV_HWMON:
+		case ADVEC_SUBDEV_LED:
+		case ADVEC_SUBDEV_WDT:
+			pdata->sub_dev_mask |= BIT(sub_dev[i]);
+			break;
+		default:
+			dev_err(pdata->dev, "invalid prop value(%d)!", sub_dev[i]);
+		}
+	}
+	dev_info(pdata->dev, "sub-dev mask = 0x%x", pdata->sub_dev_mask);
+
+	return 0;
+}
+
+static int adv_ec_probe(struct platform_device *pdev)
+{
+	int ret, i;
+	struct device *dev = &pdev->dev;
+	struct adv_ec_platform_data *adv_ec_data;
+
+	adv_ec_data = kmalloc(sizeof(struct adv_ec_platform_data), GFP_KERNEL);
+	if (!adv_ec_data) {
+		ret = -ENOMEM;
+		goto err_plat_data;
+	}
+
+	dev_set_drvdata(dev, (void *)adv_ec_data);
+	adv_ec_data->dev = dev;
+
+	mutex_init(&lock);
+
+	ret = adv_ec_init_ec_data(adv_ec_data);
+	if (ret)
+		goto err_init_data;
+
+	ret = adv_ec_parse_prop(adv_ec_data);
+	if (ret)
+		goto err_prop;
+
+	for (i = 0; i < ARRAY_SIZE(adv_ec_sub_cells); i++) {
+		if (adv_ec_data->sub_dev_mask & BIT(i)) {
+			ret = mfd_add_hotplug_devices(dev, &adv_ec_sub_cells[i], 1);
+			if (ret)
+				dev_err(dev, "failed to add %s subdevice: %d",
+					adv_ec_sub_cells[i].name, ret);
+		}
+	}
+
+	dev_info(&pdev->dev, "Ver:%s, Data:%s, probe done",
+			ADVANTECH_EC_MFD_VER, ADVANTECH_EC_MFD_DATE);
+
+	return 0;
+
+err_prop:
+err_init_data:
+	kfree(adv_ec_data->dym_tbl);
+	kfree(adv_ec_data->bios_product_name);
+	kfree(adv_ec_data);
+
+err_plat_data:
+	return ret;
+}
+
+static int adv_ec_remove(struct platform_device *pdev)
+{
+	struct adv_ec_platform_data *adv_ec_data;
+
+	adv_ec_data = (struct adv_ec_platform_data *)dev_get_drvdata(&pdev->dev);
+
+	kfree(adv_ec_data->dym_tbl);
+	kfree(adv_ec_data->bios_product_name);
+	kfree(adv_ec_data);
+
+	mfd_remove_devices(&pdev->dev);
+	mutex_destroy(&lock);
+
+	return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id adv_ec_of_match[] = {
+	{ .compatible = "advantech,ahc1ec0", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, adv_ec_of_match);
+#endif
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id adv_ec_acpi_match[] = {
+	{"AHC1EC0", },
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, adv_ec_acpi_match);
+#endif
+
+static const struct platform_device_id adv_ec_id[] = {
+	{ ADVANTECH_EC_NAME, },
+	{}
+};
+MODULE_DEVICE_TABLE(platform, adv_ec_id);
+
+static struct platform_driver adv_ec_driver = {
+	.driver = {
+		.name = ADVANTECH_EC_NAME,
+#ifdef CONFIG_OF
+		.of_match_table = of_match_ptr(adv_ec_of_match),
+#endif
+#ifdef CONFIG_ACPI
+		.acpi_match_table = ACPI_PTR(adv_ec_acpi_match),
+#endif
+	},
+	.id_table = adv_ec_id,
+	.probe = adv_ec_probe,
+	.remove = adv_ec_remove,
+};
+module_platform_driver(adv_ec_driver);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("sun.lang");
+MODULE_DESCRIPTION("Advantech EC MFD Driver.");
diff --git a/include/linux/mfd/ahc1ec0.h b/include/linux/mfd/ahc1ec0.h
new file mode 100644
index 000000000000..9c1991695305
--- /dev/null
+++ b/include/linux/mfd/ahc1ec0.h
@@ -0,0 +1,338 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __LINUX_MFD_AHC1EC0_H
+#define __LINUX_MFD_AHC1EC0_H
+
+#include <linux/device.h>
+
+#define uchar unsigned int
+
+#define EC_COMMAND_PORT             0x29A
+#define EC_STATUS_PORT              0x299
+
+#define EC_UDELAY_TIME              200
+#define EC_MAX_TIMEOUT_COUNT        5000
+
+/* AD command */
+#define EC_AD_INDEX_WRITE   0x15
+#define EC_AD_LSB_READ      0x16
+#define EC_AD_MSB_READ      0x1F
+
+/* voltage device id */
+#define EC_DID_CMOSBAT      0x50 /* CMOS coin battery voltage */
+#define EC_DID_CMOSBAT_X2   0x51 /* CMOS coin battery voltage*2 */
+#define EC_DID_CMOSBAT_X10  0x52 /* CMOS coin battery voltage*10 */
+#define EC_DID_5VS0         0x56 /* 5VS0 voltage */
+#define EC_DID_5VS0_X2      0x57 /* 5VS0 voltage*2 */
+#define EC_DID_5VS0_X10     0x58 /* 5VS0 voltage*10 */
+#define EC_DID_5VS5         0x59 /* 5VS5 voltage */
+#define EC_DID_5VS5_X2      0x5A /* 5VS5 voltage*2 */
+#define EC_DID_5VS5_X10     0x5B /* 5VS5 voltage*10 */
+#define EC_DID_12VS0        0x62 /* 12VS0 voltage */
+#define EC_DID_12VS0_X2     0x63 /* 12VS0 voltage*2 */
+#define EC_DID_12VS0_X10    0x64 /* 12VS0 voltage*10 */
+#define EC_DID_VCOREA       0x65 /* CPU A core voltage */
+#define EC_DID_VCOREA_X2    0x66 /* CPU A core voltage*2 */
+#define EC_DID_VCOREA_X10   0x67 /* CPU A core voltage*10 */
+#define EC_DID_VCOREB       0x68 /* CPU B core voltage */
+#define EC_DID_VCOREB_X2    0x69 /* CPU B core voltage*2 */
+#define EC_DID_VCOREB_X10   0x6A /* CPU B core voltage*10 */
+#define EC_DID_DC           0x6B /* ADC. onboard voltage */
+#define EC_DID_DC_X2        0x6C /* ADC. onboard voltage*2 */
+#define EC_DID_DC_X10       0x6D /* ADC. onboard voltage*10 */
+#define EC_DID_SMBOEM0      0x28 /* SMBUS/I2C. Smbus channel 0 */
+
+/* Current device id */
+#define EC_DID_CURRENT              0x74
+
+/* ACPI commands */
+#define EC_ACPI_RAM_READ            0x80
+#define EC_ACPI_RAM_WRITE           0x81
+
+/*
+ *  Dynamic control table commands
+ *  The table includes HW pin number,Device ID,and Pin polarity
+ */
+#define EC_TBL_WRITE_ITEM           0x20
+#define EC_TBL_GET_PIN              0x21
+#define EC_TBL_GET_DEVID            0x22
+#define EC_MAX_TBL_NUM              32
+
+/* LED Device ID table */
+#define EC_DID_LED_RUN              0xE1
+#define EC_DID_LED_ERR              0xE2
+#define EC_DID_LED_SYS_RECOVERY     0xE3
+#define EC_DID_LED_D105_G           0xE4
+#define EC_DID_LED_D106_G           0xE5
+#define EC_DID_LED_D107_G           0xE6
+
+/* LED control HW ram address 0xA0-0xAF */
+#define EC_HWRAM_LED_BASE_ADDR      0xA0
+#define EC_HWRAM_LED_PIN(N)         (EC_HWRAM_LED_BASE_ADDR + (4 * (N))) // N:0-3
+#define EC_HWRAM_LED_CTRL_HIBYTE(N) (EC_HWRAM_LED_BASE_ADDR + (4 * (N)) + 1)
+#define EC_HWRAM_LED_CTRL_LOBYTE(N) (EC_HWRAM_LED_BASE_ADDR + (4 * (N)) + 2)
+#define EC_HWRAM_LED_DEVICE_ID(N)   (EC_HWRAM_LED_BASE_ADDR + (4 * (N)) + 3)
+
+/* LED control bit */
+#define LED_CTRL_ENABLE_BIT             (1 << 4)
+#define LED_CTRL_INTCTL_BIT             (1 << 5)
+#define LED_CTRL_LEDBIT_MASK            (0x03FF << 6)
+#define LED_CTRL_POLARITY_MASK          (0x000F << 0)
+#define LED_CTRL_INTCTL_EXTERNAL        0
+#define LED_CTRL_INTCTL_INTERNAL        1
+
+#define LED_DISABLE  0x0
+#define LED_ON       0x1
+#define LED_FAST     0x3
+#define LED_NORMAL   0x5
+#define LED_SLOW     0x7
+#define LED_MANUAL   0xF
+
+#define LED_CTRL_LEDBIT_DISABLE	(0x0000)
+#define LED_CTRL_LEDBIT_ON		(0x03FF)
+#define LED_CTRL_LEDBIT_FAST	(0x02AA)
+#define LED_CTRL_LEDBIT_NORMAL	(0x0333)
+#define LED_CTRL_LEDBIT_SLOW	(0x03E0)
+
+/* Get the device name */
+#define AMI_BIOS_NAME                               "AMIBIOS"
+#define AMI_BIOS_NAME_ADDRESS                       0x000FF400
+#define AMI_BIOS_NAME_LENGTH                        strlen(AMI_BIOS_NAME)
+#define AMI_ADVANTECH_BOARD_ID_ADDRESS              0x000FE840
+#define AMI_ADVANTECH_BOARD_ID_LENGTH               32
+#define AMI_ADVANTECH_BOARD_NAME_ADDRESS            0x000FF550
+#define AMI_ADVANTECH_BOARD_NAME_LENGTH             _ADVANTECH_BOARD_NAME_LENGTH
+#define AMI_UEFI_ADVANTECH_BOARD_NAME_ADDRESS       0x000F0000
+#define AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH        0xFFFF
+
+/*
+ *  EC WDT commands
+ *  EC can send multistage watchdog event. System can setup watchdog event
+ *  independently to makeup event sequence.
+ */
+#define	EC_WDT_START			0x28
+#define	EC_WDT_STOP		        0x29
+#define	EC_WDT_RESET			0x2A
+#define	EC_WDT_BOOTTMEWDT_STOP		0x2B
+#define EC_HW_RAM			0x89
+#define EC_EVENT_FLAG			0x57
+#define EC_RESET_EVENT			0x04
+#define EC_COMMANS_PORT_IBF_MASK	0x02
+#define EC_ENABLE_DELAY_L		0x59
+#define EC_ENABLE_DELAY_H		0x58
+#define EC_POWER_BTN_TIME_L		0x5B
+#define EC_POWER_BTN_TIME_H		0x5A
+#define EC_RESET_DELAY_TIME_L		0x5F
+#define EC_RESET_DELAY_TIME_H		0x5E
+#define EC_PIN_DELAY_TIME_L		0x61
+#define EC_PIN_DELAY_TIME_H		0x60
+#define EC_SCI_DELAY_TIME_H		0x62
+#define EC_SCI_DELAY_TIME_L		0x63
+
+/* EC ACPI commands */
+#define EC_ACPI_DATA_READ		0x80
+#define EC_ACPI_DATA_WRITE		0x81
+
+/* Brightness ACPI Addr */
+#define BRIGHTNESS_ACPI_ADDR		0x50
+
+/* EC HW Ram commands */
+#define EC_HW_EXTEND_RAM_READ		0x86
+#define EC_HW_EXTEND_RAM_WRITE		0x87
+#define	EC_HW_RAM_READ			0x88
+#define EC_HW_RAM_WRITE			0x89
+
+/* EC Smbus commands */
+#define EC_SMBUS_CHANNEL_SET	0x8A	 /* Set selector number (SMBUS channel) */
+#define EC_SMBUS_ENABLE_I2C	0x8C	 /* Enable channel I2C */
+#define EC_SMBUS_DISABLE_I2C	0x8D	 /* Disable channel I2C */
+
+/* Smbus transmit protocol */
+#define EC_SMBUS_PROTOCOL		0x00
+
+/* SMBUS status */
+#define EC_SMBUS_STATUS			0x01
+
+/* SMBUS device slave address (bit0 must be 0) */
+#define EC_SMBUS_SLV_ADDR		0x02
+
+/* SMBUS device command */
+#define EC_SMBUS_CMD			0x03
+
+/* 0x04-0x24 Data In read process, return data are stored in this address */
+#define EC_SMBUS_DATA			0x04
+
+#define EC_SMBUS_DAT_OFFSET(n)	(EC_SMBUS_DATA + (n))
+
+/* SMBUS channel selector (0-4) */
+#define EC_SMBUS_CHANNEL		0x2B
+
+/* EC SMBUS transmit Protocol code */
+#define SMBUS_QUICK_WRITE		0x02 /* Write Quick Command */
+#define SMBUS_QUICK_READ		0x03 /* Read Quick Command */
+#define SMBUS_BYTE_SEND			0x04 /* Send Byte */
+#define SMBUS_BYTE_RECEIVE		0x05 /* Receive Byte */
+#define SMBUS_BYTE_WRITE		0x06 /* Write Byte */
+#define SMBUS_BYTE_READ			0x07 /* Read Byte */
+#define SMBUS_WORD_WRITE		0x08 /* Write Word */
+#define SMBUS_WORD_READ			0x09 /* Read Word */
+#define SMBUS_BLOCK_WRITE		0x0A /* Write Block */
+#define SMBUS_BLOCK_READ		0x0B /* Read Block */
+#define SMBUS_PROC_CALL			0x0C /* Process Call */
+#define SMBUS_BLOCK_PROC_CALL	0x0D /* Write Block-Read Block Process Call */
+#define SMBUS_I2C_READ_WRITE	0x0E /* I2C block Read-Write */
+#define SMBUS_I2C_WRITE_READ	0x0F /* I2C block Write-Read */
+
+/* GPIO control commands */
+#define EC_GPIO_INDEX_WRITE		0x10
+#define EC_GPIO_STATUS_READ		0x11
+#define EC_GPIO_STATUS_WRITE		0x12
+#define EC_GPIO_DIR_READ		0x1D
+#define EC_GPIO_DIR_WRITE		0x1E
+
+/* One Key Recovery commands */
+#define EC_ONE_KEY_FLAG         0x9C
+
+/* ASG OEM commands */
+#define EC_ASG_OEM				0xEA
+#define EC_ASG_OEM_READ			0x00
+#define EC_ASG_OEM_WRITE		0x01
+#define EC_OEM_POWER_STATUS_VIN1	0X10
+#define EC_OEM_POWER_STATUS_VIN2	0X11
+#define EC_OEM_POWER_STATUS_BAT1	0X12
+#define EC_OEM_POWER_STATUS_BAT2	0X13
+
+/* GPIO DEVICE ID */
+#define EC_DID_ALTGPIO_0        0x10    /* 0x10 AltGpio0 User define gpio */
+#define EC_DID_ALTGPIO_1        0x11    /* 0x11 AltGpio1 User define gpio */
+#define EC_DID_ALTGPIO_2        0x12    /* 0x12 AltGpio2 User define gpio */
+#define EC_DID_ALTGPIO_3        0x13    /* 0x13 AltGpio3 User define gpio */
+#define EC_DID_ALTGPIO_4        0x14    /* 0x14 AltGpio4 User define gpio */
+#define EC_DID_ALTGPIO_5        0x15    /* 0x15 AltGpio5 User define gpio */
+#define EC_DID_ALTGPIO_6        0x16    /* 0x16 AltGpio6 User define gpio */
+#define EC_DID_ALTGPIO_7        0x17    /* 0x17 AltGpio7 User define gpio */
+
+/* Lmsensor Chip Register */
+#define NSLM96163_CHANNEL		0x02
+
+/* NS_LM96163 address 0x98 */
+#define NSLM96163_ADDR			0x98
+
+/* LM96163 index(0x00) Local Temperature (Signed MSB) */
+#define NSLM96163_LOC_TEMP		0x00
+
+#define F75387_REG_R_MANU_ID	0x5D
+#define F75387_REG_R_CHIP_ID	0x5A
+
+#define LMF75387_MANU_ID_FINTEK			0x1934 //VENDOR ID
+#define LMF75387_CHIP_ID_F75387			0x0410 //CHIPID
+
+/* Lmsensor Chip SMUBS Slave Address */
+#define	LMF75387_SMBUS_SLAVE_ADDRESS_5C		0x5c
+#define	LMF75387_SMBUS_SLAVE_ADDRESS_5A		0x5A
+#define	INA266_SMBUS_SLAVE_ADDRESS_8A		0x8A
+
+/* Temperature */
+#define F75387_REG_R_TEMP0_MSB      0x14    /* 1 degree */
+#define F75387_REG_R_TEMP0_LSB      0x1A    /* 1/256 degree */
+
+#define F75387_REG_R_TEMP1_MSB      0x15    /* 1 degree */
+#define F75387_REG_R_TEMP1_LSB      0x1B    /* 1/256 degree */
+
+/* LOCAL Temperature */
+#define F75387_REG_R_TEMP2_MSB      0x1C    /* local temp., 1 degree */
+#define F75387_REG_R_TEMP2_LSB      0x1D    /*              1/256 degree */
+
+/* Voltage */
+#define F75387_REG_R_V1             0x11    /* 8mV */
+#define F75387_REG_R_V2             0x12    /* 8mV */
+#define F75387_REG_R_V3             0x13    /* 8mV */
+
+/* HWMON registers */
+#define INA266_REG_VOLTAGE          0x02    /* 1.25mV */
+#define INA266_REG_POWER            0x03    /* 25mW */
+#define INA266_REG_CURRENT          0x04    /* 1mA */
+
+struct HW_PIN_TBL {
+	uchar vbat[2];
+	uchar v5[2];
+	uchar v12[2];
+	uchar vcore[2];
+	uchar vdc[2];
+	uchar ec_current[2];
+	uchar power[2];
+};
+
+struct Dynamic_Tab {
+	uchar DeviceID;
+	uchar HWPinNumber;
+};
+
+struct EC_SMBOEM0 {
+	uchar HWPinNumber;
+};
+
+struct EC_READ_HW_RAM {
+	unsigned int addr;
+	unsigned int data;
+};
+
+struct EC_WRITE_HW_RAM {
+	unsigned int addr;
+	unsigned int data;
+};
+
+struct EC_SMBUS_WORD_DATA {
+	unsigned char   Channel;
+	unsigned char   Address;
+	unsigned char   Register;
+	unsigned short  Value;
+};
+
+struct EC_SMBUS_READ_BYTE {
+	unsigned char Channel;
+	unsigned char Address;
+	unsigned char Register;
+	unsigned char Data;
+};
+
+struct EC_SMBUS_WRITE_BYTE {
+	unsigned char Channel;
+	unsigned char Address;
+	unsigned char Register;
+	unsigned char Data;
+};
+
+struct pled_hw_pin_tbl {
+	uchar pled[6];
+};
+
+struct adv_ec_platform_data {
+	char *bios_product_name;
+	int sub_dev_nb;
+	u32 sub_dev_mask;
+
+	struct device *dev;
+	struct class *adv_ec_class;
+
+	struct Dynamic_Tab *dym_tbl;
+};
+
+int read_ad_value(uchar hwpin, uchar multi);
+int read_acpi_value(uchar addr, uchar *pvalue);
+int write_hw_ram(uchar addr, uchar data);
+int write_hwram_command(uchar data);
+int smbus_read_word(struct EC_SMBUS_WORD_DATA *ptr_ec_smbus_word_data);
+int smbus_read_byte(struct EC_SMBUS_READ_BYTE *ptr_ec_smbus_read_byte);
+int write_acpi_value(uchar addr, uchar value);
+int read_gpio_status(uchar PinNumber, uchar *pvalue);
+int write_gpio_status(uchar PinNumber, uchar value);
+int read_gpio_dir(uchar PinNumber, uchar *pvalue);
+int write_gpio_dir(uchar PinNumber, uchar value);
+int write_hw_extend_ram(uchar addr, uchar data);
+int smbus_write_byte(struct EC_SMBUS_WRITE_BYTE *ptr_ec_smbus_write_byte);
+int read_onekey_status(uchar addr, uchar *pdata);
+int write_onekey_status(uchar addr);
+int ec_oem_get_status(uchar addr, uchar *pdata);
+int ec_oem_set_status(uchar addr, uchar pdata);
+
+#endif /* __LINUX_MFD_AHC1EC0_H */
