Re: [PATCH v2 4/6] Add Advantech iManager I2C driver

Re: [PATCH v2 4/6] Add Advantech iManager I2C driver

[kbuild test robot]

Hi Richard,

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on v4.4-rc8 next-20160108]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/richard-dorsch-gmail-com/Add-Advantech-iManager-EC-driver-set/20160110-171635
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next


coccinelle warnings: (new ones prefixed by >>)

>> drivers/i2c/busses/imanager-i2c.c:228:3-8: No need to set .owner here. The core will do it.

Please review and possibly fold the followup patch.

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[PATCH v2 4/6] Add Advantech iManager I2C driver

[richard.dorsch]

From: Richard Vidal-Dorsch <richard.dorsch@gmail.com>

Signed-off-by: Richard Vidal-Dorsch <richard.dorsch@gmail.com>
---
 Documentation/i2c/busses/i2c-imanager |  48 ++++
 drivers/i2c/busses/Kconfig            |  11 +
 drivers/i2c/busses/Makefile           |   2 +
 drivers/i2c/busses/imanager-ec-i2c.c  | 466 ++++++++++++++++++++++++++++++++++
 drivers/i2c/busses/imanager-i2c.c     | 240 +++++++++++++++++
 include/linux/mfd/imanager/i2c.h      |  55 ++++
 6 files changed, 822 insertions(+)
 create mode 100644 Documentation/i2c/busses/i2c-imanager
 create mode 100644 drivers/i2c/busses/imanager-ec-i2c.c
 create mode 100644 drivers/i2c/busses/imanager-i2c.c
 create mode 100644 include/linux/mfd/imanager/i2c.h

diff --git a/Documentation/i2c/busses/i2c-imanager b/Documentation/i2c/busses/i2c-imanager
new file mode 100644
index 0000000..d149fbf
--- /dev/null
+++ b/Documentation/i2c/busses/i2c-imanager
@@ -0,0 +1,48 @@
+Kernel driver imanager_i2c
+==========================
+
+This platform driver provides support for iManager I2C/SMBus.
+
+This driver depends on imanager (mfd).
+
+Module Parameters
+-----------------
+
+* bus_frequency (unsigned short)
+Set desired bus frequency. Valid values (kHz) are:
+  50  Slow
+ 100  Standard (default)
+ 400  Fast
+
+
+Description
+-----------
+
+The Advantech iManager provides up to four SMBus controllers. One of them
+is configured for I2C compatibility.
+
+
+Process Call Support
+--------------------
+
+Not supported.
+
+
+I2C Block Read Support
+----------------------
+
+I2C block read is supported.
+
+
+SMBus 2.0 Support
+-----------------
+
+Several SMBus 2.0 features are supported.
+No PEC support.
+
+
+Interrupt Support
+-----------------
+
+No interrupt support available
+
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 7b0aa82..4c401a4 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -42,6 +42,17 @@ config I2C_ALI15X3
 	  This driver can also be built as a module.  If so, the module
 	  will be called i2c-ali15x3.
 
+config I2C_IMANAGER
+	tristate "Advantech iManager I2C Interface"
+	depends on MFD_IMANAGER
+	help
+	  This enables support for Advantech iManager I2C of some
+	  Advantech SOM, MIO, AIMB, and PCM modules/boards.
+	  Requires mfd-core and imanager-core to function properly.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called i2c-imanager.
+
 config I2C_AMD756
 	tristate "AMD 756/766/768/8111 and nVidia nForce"
 	depends on PCI
diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
index 37f2819..da76404 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -15,6 +15,8 @@ obj-$(CONFIG_I2C_AMD8111)	+= i2c-amd8111.o
 obj-$(CONFIG_I2C_I801)		+= i2c-i801.o
 obj-$(CONFIG_I2C_ISCH)		+= i2c-isch.o
 obj-$(CONFIG_I2C_ISMT)		+= i2c-ismt.o
+i2c-imanager-objs		:= imanager-i2c.o imanager-ec-i2c.o
+obj-$(CONFIG_I2C_IMANAGER)	+= i2c-imanager.o
 obj-$(CONFIG_I2C_NFORCE2)	+= i2c-nforce2.o
 obj-$(CONFIG_I2C_NFORCE2_S4985)	+= i2c-nforce2-s4985.o
 obj-$(CONFIG_I2C_PIIX4)		+= i2c-piix4.o
diff --git a/drivers/i2c/busses/imanager-ec-i2c.c b/drivers/i2c/busses/imanager-ec-i2c.c
new file mode 100644
index 0000000..f8839dc
--- /dev/null
+++ b/drivers/i2c/busses/imanager-ec-i2c.c
@@ -0,0 +1,466 @@
+/*
+ * Advantech iManager I2C bus core
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/bug.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/byteorder/generic.h>
+#include <linux/mfd/imanager/ec.h>
+#include <linux/mfd/imanager/i2c.h>
+
+#define I2C_SMBUS_BLOCK_SIZE	32
+
+#define EVAL_WR_SIZE(x)	\
+		(x < I2C_SMBUS_BLOCK_SIZE ? x : I2C_SMBUS_BLOCK_SIZE - 1)
+#define EVAL_RD_SIZE(x) \
+		(x && (x <= I2C_SMBUS_BLOCK_SIZE) ? x : I2C_SMBUS_BLOCK_SIZE)
+
+#define EC_HWRAM_OFFSET_STATUS	0UL
+
+#define I2C_ERR_PROTO		0x19UL
+#define I2C_ERR_TIMEOUT		0x18UL
+#define I2C_ERR_ACCESS		0x17UL
+#define I2C_ERR_UNKNOWN		0x13UL
+#define I2C_ERR_ADDR_NACK	0x10UL
+
+#define EC_SMB_DID(N)		(0x28 + N)
+
+struct ec_i2c_status {
+	u32 error	: 7;
+	u32 complete	: 1;
+};
+
+static const struct imanager_i2c_device *i2c;
+
+static int i2c_core_eval_status(u8 _status)
+{
+	struct ec_i2c_status *status = (struct ec_i2c_status *)&_status;
+	int err = 0;
+
+	switch (status->error) {
+	case 0:
+		break;
+	case I2C_ERR_ADDR_NACK:
+		err = -ENODEV;
+		break;
+	case I2C_ERR_ACCESS:
+	case I2C_ERR_UNKNOWN:
+		err = -EAGAIN;
+		break;
+	case I2C_ERR_TIMEOUT:
+		err = -ETIME;
+		break;
+	case I2C_ERR_PROTO:
+		err = -EPROTO;
+		break;
+	default:
+		pr_err("Undefined status code 0x%02X\n", status->error);
+		err = -EIO;
+		break;
+	}
+
+	return err;
+}
+
+static inline int i2c_send_message(u8 cmd, u8 param, struct ec_message *msg)
+{
+	int err;
+
+	err = imanager_msg_write(cmd, param, msg);
+	if (err)
+		return i2c_core_eval_status(err);
+
+	return 0;
+}
+
+static int i2c_core_blk_wr_rw_combined(u8 proto, struct ec_message *msg)
+{
+	int err;
+
+	if (WARN_ON(!msg))
+		return -EINVAL;
+
+	err = imanager_wait_proc_complete(EC_HWRAM_OFFSET_STATUS, 0);
+	if (err)
+		return err;
+
+	err = i2c_send_message(proto, i2c->i2coem->did, msg);
+	if (err)
+		return err;
+
+	if (msg->rlen) {
+		if (msg->rlen == 1)
+			return msg->u.data[0];
+		else if (msg->rlen == 2)
+			return (msg->u.data[1] << 8) | msg->u.data[0];
+		else
+			return msg->rlen;
+	}
+
+	return 0;
+}
+
+/* Write-Read and Read-Write wrappers */
+static inline int i2c_core_wr_combined(struct ec_message *msg)
+{
+	return i2c_core_blk_wr_rw_combined(EC_CMD_I2C_WR, msg);
+}
+
+static inline int i2c_core_rw_combined(struct ec_message *msg)
+{
+	return i2c_core_blk_wr_rw_combined(EC_CMD_I2C_RW, msg);
+}
+
+/*
+ * iManager I2C core API
+ */
+int i2c_core_write_quick(u16 addr)
+{
+	struct ec_message msg = {
+		.rlen = 0,
+		.wlen = sizeof(struct ec_message_header),
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = 0,
+				.wlen = 1,
+			},
+		},
+	};
+
+	return i2c_core_wr_combined(&msg);
+}
+
+int i2c_core_read_byte(u16 addr)
+{
+	struct ec_message msg = {
+		.rlen = 1,
+		.wlen = sizeof(struct ec_message_header),
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = 1,
+				.wlen = 0,
+			},
+		},
+	};
+
+	return i2c_core_rw_combined(&msg);
+}
+
+int i2c_core_write_byte(u16 addr, u8 cmd)
+{
+	struct ec_message msg = {
+		.rlen = 1,
+		.wlen = sizeof(struct ec_message_header),
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = 1,
+				.wlen = 1,
+				.cmd  = cmd,
+			},
+		},
+	};
+
+	return i2c_core_wr_combined(&msg);
+}
+
+int i2c_core_read_byte_data(u16 addr, u8 cmd)
+{
+	struct ec_message msg = {
+		.rlen = 1,
+		.wlen = sizeof(struct ec_message_header),
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = 1,
+				.wlen = 1,
+				.cmd  = cmd,
+			},
+		},
+	};
+
+	return i2c_core_wr_combined(&msg);
+}
+
+int i2c_core_write_byte_data(u16 addr, u8 cmd, u8 value)
+{
+	struct ec_message msg = {
+		.rlen = 1,
+		.wlen = sizeof(struct ec_message_header) + 1,
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = 0,
+				.wlen = 2,
+				.cmd  = cmd,
+			},
+			.smb.data[0] = value,
+		},
+	};
+
+	return i2c_core_wr_combined(&msg);
+}
+
+int i2c_core_read_word_data(u16 addr, u8 cmd)
+{
+	struct ec_message msg = {
+		.rlen = 2,
+		.wlen = sizeof(struct ec_message_header),
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = 2,
+				.wlen = 1,
+				.cmd  = cmd,
+			},
+		},
+	};
+
+	return i2c_core_wr_combined(&msg);
+}
+
+int i2c_core_write_word_data(u16 addr, u8 cmd, u16 value)
+{
+	struct ec_message msg = {
+		.rlen = 1,
+		.wlen = sizeof(struct ec_message_header) + 2,
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = 0,
+				.wlen = 3,
+				.cmd  = cmd,
+			},
+			.smb.data[0] = LOBYTE16(value),
+			.smb.data[1] = HIBYTE16(value),
+		},
+	};
+
+	return i2c_core_wr_combined(&msg);
+}
+
+int i2c_core_write_block_data(u16 addr, u8 cmd, u8 *buf)
+{
+	int i;
+	struct ec_message msg = {
+		.rlen = 1,
+		.wlen = sizeof(struct ec_message_header) +
+			EVAL_WR_SIZE(buf[0]),
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = 0,
+				.wlen = 1 + EVAL_WR_SIZE(buf[0]),
+				.cmd  = cmd,
+			},
+		},
+	};
+
+	if ((buf[0] == 0) || (buf[0] >= I2C_MAX_WRITE_BYTES)) {
+		pr_err("Invalid I2C write length %d\n", buf[0]);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < EVAL_WR_SIZE(buf[0]); i++)
+		msg.u.data[i + sizeof(struct ec_message_header)] = buf[i + 1];
+
+	return i2c_core_wr_combined(&msg);
+}
+
+int i2c_core_read_block_data(u16 addr, u8 cmd, u8 *buf)
+{
+	int i;
+	int ret;
+	struct ec_message msg = {
+		.rlen = EVAL_RD_SIZE(buf[0]),
+		.wlen = sizeof(struct ec_message_header),
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = EVAL_RD_SIZE(buf[0]),
+				.wlen = 1,
+				.cmd  = cmd,
+			},
+		},
+	};
+
+	/*
+	 * If buf[0] == 0 EC will read I2C_MAX_READ_BYTES
+	 */
+	ret = i2c_core_wr_combined(&msg);
+	if (ret < 0) {
+		pr_err("I2C transaction failed\n");
+		return ret;
+	}
+
+	buf[0] = ret;
+	for (i = 0; i < ret; i++)
+		buf[i + 1] = msg.u.data[i];
+
+	return 0;
+}
+
+int i2c_core_read_i2c_block_data(u16 addr, u8 cmd, u8 *buf)
+{
+	int i;
+	int ret;
+	struct ec_message msg = {
+		.rlen = EVAL_RD_SIZE(buf[0]),
+		.wlen = sizeof(struct ec_message_header),
+		.u = {
+			.smb.hdr = {
+				.addr_low  = LOADDR16(addr),
+				.addr_high = HIADDR16(addr),
+				.rlen = EVAL_RD_SIZE(buf[0]),
+				.wlen = 1,
+				.cmd  = cmd,
+			},
+		},
+	};
+
+	if ((buf[0] == 0) || (buf[0] > I2C_MAX_READ_BYTES)) {
+		pr_err("Invalid I2C read length\n");
+		return -EINVAL;
+	}
+
+	ret = i2c_core_wr_combined(&msg);
+	if (ret < 0) {
+		pr_err("I2C transaction failed\n");
+		return ret;
+	}
+
+	buf[0] = ret;
+	for (i = 0; i < ret; i++)
+		buf[i + 1] = msg.u.data[i];
+
+	return 0;
+}
+
+int i2c_core_write_i2c_block_data(u16 addr, u8 cmd, u8 *buf)
+{
+	if (WARN_ON(!buf))
+		return -EINVAL;
+
+	return i2c_core_write_block_data(addr, cmd, buf);
+}
+
+int i2c_core_smb_get_freq(u32 bus_id)
+{
+	int ret = 0, f;
+	int freq_id, freq;
+
+	if (WARN_ON(bus_id > I2C_OEM_1))
+		return -EINVAL;
+
+	switch (i2c->ecdev->id) {
+	case IT8518:
+	case IT8528:
+		ret = imanager_read_word(EC_CMD_SMB_FREQ_RD,
+					 EC_SMB_DID(bus_id));
+		if (ret < 0) {
+			pr_err("Failed to get bus frequency\n");
+			return ret;
+		}
+
+		freq_id = HIBYTE16(ret);
+		f = LOBYTE16(ret);
+		switch (freq_id) {
+		case 0:
+			freq = f;
+			break;
+		case 1:
+			freq = 50;
+			break;
+		case 2:
+			freq = 100;
+			break;
+		case 3:
+			freq = 400;
+			break;
+		default:
+			return -EINVAL;
+		}
+		break;
+	default:
+		pr_err("EC version not supported!\n");
+		return -ENODEV;
+	}
+
+	return freq;
+}
+
+int i2c_core_smb_set_freq(u32 bus_id, u32 freq)
+{
+	int err;
+	u16 val;
+
+	if (WARN_ON(bus_id > I2C_OEM_1))
+		return -EINVAL;
+
+	switch (i2c->ecdev->id) {
+	case IT8518:
+	case IT8528:
+		switch (freq) {
+		case 50:
+			val = 0x0100;
+			break;
+		case 100:
+			val = 0x0200;
+			break;
+		case 400:
+			val = 0x0300;
+			break;
+		default:
+			if (freq < 50)
+				val = freq;
+			else
+				return -EINVAL;
+		}
+
+		err = imanager_write_word(EC_CMD_SMB_FREQ_WR,
+					  EC_SMB_DID(bus_id), val);
+		if (err) {
+			pr_err("Failed to set I2C bus frequency\n");
+			return err;
+		}
+		break;
+	default:
+		pr_err("EC version not supported!\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+int i2c_core_init(void)
+{
+	i2c = imanager_get_i2c_device();
+	if (!i2c)
+		return -ENODEV;
+
+	return 0;
+}
+
diff --git a/drivers/i2c/busses/imanager-i2c.c b/drivers/i2c/busses/imanager-i2c.c
new file mode 100644
index 0000000..bbfd453
--- /dev/null
+++ b/drivers/i2c/busses/imanager-i2c.c
@@ -0,0 +1,240 @@
+/*
+ * Advantech iManager I2C bus driver
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/mfd/imanager/core.h>
+#include <linux/mfd/imanager/i2c.h>
+
+static uint bus_frequency = 100;
+module_param(bus_frequency, uint, 0);
+MODULE_PARM_DESC(bus_frequency,
+	"I2C bus frequency [50, 100, 400]kHz (defaults to 100kHz)");
+
+struct imanager_i2c_data {
+	struct imanager_device_data *idev;
+	struct i2c_adapter adapter;
+};
+
+static int imanager_smb_access(struct i2c_adapter *adap, u16 addr,
+	unsigned short flags, char read_write, u8 command,
+	int size, union i2c_smbus_data *smb_data)
+{
+	struct imanager_i2c_data *data = i2c_get_adapdata(adap);
+	struct device *dev = data->adapter.dev.parent;
+	int ret = 0;
+	int val = 0;
+
+	if (!data)
+		return -ENODEV;
+
+	addr <<= 1;
+
+	mutex_lock(&data->idev->lock);
+
+	switch (size) {
+	case I2C_SMBUS_QUICK:
+		ret = i2c_core_write_quick(addr);
+		break;
+	case I2C_SMBUS_BYTE:
+		if (read_write == I2C_SMBUS_WRITE) /* NOT tested */
+			val = i2c_core_write_byte(addr, command);
+		else
+			val = i2c_core_read_byte(addr);
+
+		if (val < 0)
+			ret = val;
+		else
+			smb_data->byte = val;
+		break;
+	case I2C_SMBUS_BYTE_DATA:
+		if (read_write == I2C_SMBUS_WRITE)
+			val = i2c_core_write_byte_data(addr, command,
+				smb_data->byte);
+		else
+			val = i2c_core_read_byte_data(addr, command);
+
+		if (val < 0)
+			ret = val;
+		else
+			smb_data->byte = val;
+		break;
+	case I2C_SMBUS_WORD_DATA:
+		if (read_write == I2C_SMBUS_WRITE)
+			val = i2c_core_write_word_data(addr, command,
+				smb_data->word);
+		else
+			val = i2c_core_read_word_data(addr, command);
+
+		if (val < 0)
+			ret = val;
+		else
+			smb_data->word = val;
+		break;
+	case I2C_SMBUS_BLOCK_DATA:
+		if (read_write == I2C_SMBUS_WRITE)
+			ret = i2c_core_write_block_data(addr, command,
+				smb_data->block);
+		else
+			ret = i2c_core_read_block_data(addr, command,
+				smb_data->block);
+		break;
+	case I2C_SMBUS_I2C_BLOCK_DATA:
+		if (read_write == I2C_SMBUS_WRITE)
+			ret = i2c_core_write_i2c_block_data(addr, command,
+				smb_data->block);
+		else
+			ret = i2c_core_read_i2c_block_data(addr, command,
+				smb_data->block);
+		break;
+	default:
+		dev_err(dev, "Unsupported SMB transaction %d\n", size);
+		ret = -EOPNOTSUPP;
+	}
+
+	mutex_unlock(&data->idev->lock);
+
+	return ret;
+}
+
+static int imanager_i2c_access(struct i2c_adapter *adap, struct i2c_msg *msg,
+			int num)
+{
+	struct imanager_i2c_data *data = i2c_get_adapdata(adap);
+	struct device *dev = data->adapter.dev.parent;
+
+	/*
+	 * To be implemented
+	 */
+
+	dev_info(dev, "i2c_access() is not yet implemented. msg=%p, num=%d\n",
+		 msg, num);
+
+	return 0;
+}
+
+static u32 imanager_smb_i2c_func(struct i2c_adapter *adapter)
+{
+	return	I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
+		I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
+		I2C_FUNC_SMBUS_BLOCK_DATA |
+		I2C_FUNC_SMBUS_I2C_BLOCK | I2C_FUNC_I2C;
+}
+
+static const struct i2c_algorithm imanager_algorithm = {
+	.smbus_xfer     = imanager_smb_access,
+	.master_xfer    = imanager_i2c_access,
+	.functionality  = imanager_smb_i2c_func,
+};
+
+static int imanager_i2c_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct imanager_device_data *idev = dev_get_drvdata(dev->parent);
+	struct imanager_i2c_data *i2c;
+	int ret;
+
+	if (!idev) {
+		dev_err(dev, "Invalid platform data\n");
+		return -EINVAL;
+	}
+
+	ret = i2c_core_init();
+	if (ret) {
+		dev_err(dev, "Failed to initialize I2C core\n");
+		return -EIO;
+	}
+
+	if (bus_frequency > 100)
+		bus_frequency = 400;
+	else if (bus_frequency < 50)
+		bus_frequency = 50;
+	else
+		bus_frequency = 100;
+
+	ret = i2c_core_smb_set_freq(I2C_OEM_1, bus_frequency);
+	if (ret < 0) {
+		dev_err(dev, "Failed to set I2C bus frequency to %d kHz\n",
+				bus_frequency);
+		return ret;
+	}
+
+	ret = i2c_core_smb_get_freq(I2C_OEM_1);
+	if (ret < 0) {
+		dev_err(dev, "Failed to get I2C bus frequency\n");
+		return ret;
+	}
+	bus_frequency = ret;
+	dev_info(dev, "Bus frequency: %d kHz\n", bus_frequency);
+
+	i2c = devm_kzalloc(dev, sizeof(struct imanager_i2c_data), GFP_KERNEL);
+	if (!i2c)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, i2c);
+	i2c_set_adapdata(&i2c->adapter, i2c);
+
+	i2c->idev = idev;
+
+	i2c->adapter.owner	= THIS_MODULE;
+	i2c->adapter.class	= I2C_CLASS_HWMON | I2C_CLASS_SPD;
+	i2c->adapter.algo	= &imanager_algorithm;
+
+	/* set up the sysfs linkage to our parent device */
+	i2c->adapter.dev.parent = dev;
+
+	/* Retry up to 3 times on lost arbitration */
+	i2c->adapter.retries = 3;
+
+	snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
+		"iManager I2C driver");
+
+	ret = i2c_add_adapter(&i2c->adapter);
+	if (ret) {
+		dev_err(dev, "Failed to add SMBus adapter\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int imanager_i2c_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct imanager_i2c_data *i2c = dev_get_drvdata(dev);
+
+	i2c_del_adapter(&i2c->adapter);
+	i2c_set_adapdata(&i2c->adapter, NULL);
+
+	return 0;
+}
+
+static struct platform_driver imanager_i2c_driver = {
+	.driver = {
+		.owner = THIS_MODULE,
+		.name  = "imanager_i2c",
+	},
+	.probe	= imanager_i2c_probe,
+	.remove	= imanager_i2c_remove,
+};
+
+module_platform_driver(imanager_i2c_driver);
+
+MODULE_DESCRIPTION("Advantech iManager I2C Driver");
+MODULE_AUTHOR("Richard Vidal-Dorsch <richard.dorsch at advantech.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imanager_i2c");
diff --git a/include/linux/mfd/imanager/i2c.h b/include/linux/mfd/imanager/i2c.h
new file mode 100644
index 0000000..a8ef6c2
--- /dev/null
+++ b/include/linux/mfd/imanager/i2c.h
@@ -0,0 +1,55 @@
+/*
+ * Advantech iManager I2C bus core
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __I2C_H__
+#define __I2C_H__
+
+#include <linux/types.h>
+
+#define I2C_MAX_READ_BYTES	32
+#define I2C_MAX_WRITE_BYTES	32
+
+/* Only for setting SMBus frequency */
+enum smb_bus_id {
+	SMB_OEM_0,
+	SMB_OEM_1,
+	SMB_OEM_2,
+	SMB_EEPROM,
+	SMB_TH_0,
+	SMB_TH_1,
+	SMB_SECURITY_EEPROM,
+	I2C_OEM_1,
+};
+
+int i2c_core_init(void);
+
+int i2c_core_write_quick(u16 addr);
+
+int i2c_core_read_byte(u16 addr);
+int i2c_core_write_byte(u16 addr, u8 cmd);
+
+int i2c_core_write_byte_data(u16 addr, u8 cmd, u8 value);
+int i2c_core_read_byte_data(u16 addr, u8 cmd);
+
+int i2c_core_write_word_data(u16 addr, u8 cmd, u16 value);
+int i2c_core_read_word_data(u16 addr, u8 cmd);
+
+int i2c_core_write_block_data(u16 addr, u8 cmd, u8 *buf);
+int i2c_core_read_block_data(u16 addr, u8 cmd, u8 *buf);
+
+int i2c_core_write_i2c_block_data(u16 addr, u8 cmd, u8 *buf);
+int i2c_core_read_i2c_block_data(u16 addr, u8 cmd, u8 *buf);
+
+int i2c_core_smb_get_freq(u32 bus_id);
+int i2c_core_smb_set_freq(u32 bus_id, u32 freq);
+
+#endif
-- 
2.6.4

[PATCH] fix platform_no_drv_owner.cocci warnings

[kbuild test robot]

drivers/i2c/busses/imanager-i2c.c:228:3-8: No need to set .owner here. The core will do it.

 Remove .owner field if calls are used which set it automatically

Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

CC: Richard Vidal-Dorsch <richard.dorsch@gmail.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---

 imanager-i2c.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/i2c/busses/imanager-i2c.c
+++ b/drivers/i2c/busses/imanager-i2c.c
@@ -225,7 +225,6 @@ static int imanager_i2c_remove(struct pl
 
 static struct platform_driver imanager_i2c_driver = {
 	.driver = {
-		.owner = THIS_MODULE,
 		.name  = "imanager_i2c",
 	},
 	.probe	= imanager_i2c_probe,

Re: [PATCH v2 5/6] Add Advantech iManager Backlight driver

[kbuild test robot]

Hi Richard,

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on v4.4-rc8 next-20160108]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/richard-dorsch-gmail-com/Add-Advantech-iManager-EC-driver-set/20160110-171635
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next


coccinelle warnings: (new ones prefixed by >>)

>> drivers/video/backlight/imanager-bl.c:187:3-8: No need to set .owner here. The core will do it.

Please review and possibly fold the followup patch.

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[PATCH] fix platform_no_drv_owner.cocci warnings

[kbuild test robot]

drivers/video/backlight/imanager-bl.c:187:3-8: No need to set .owner here. The core will do it.

 Remove .owner field if calls are used which set it automatically

Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

CC: Richard Vidal-Dorsch <richard.dorsch-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Signed-off-by: Fengguang Wu <fengguang.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---

 imanager-bl.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/video/backlight/imanager-bl.c
+++ b/drivers/video/backlight/imanager-bl.c
@@ -184,7 +184,6 @@ static int imanager_backlight_remove(str
 
 static struct platform_driver imanager_backlight_driver = {
 	.driver = {
-		.owner	= THIS_MODULE,
 		.name	= "imanager_backlight",
 	},
 	.probe	= imanager_backlight_probe,
--
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Re: [PATCH v2 3/6] Add Advantech iManager HWmon driver

[kbuild test robot]

Hi Richard,

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on v4.4-rc8 next-20160108]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/richard-dorsch-gmail-com/Add-Advantech-iManager-EC-driver-set/20160110-171635
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next


coccinelle warnings: (new ones prefixed by >>)

>> drivers/hwmon/imanager-hwmon.c:1047:3-8: No need to set .owner here. The core will do it.

Please review and possibly fold the followup patch.

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[PATCH v2 3/6] Add Advantech iManager HWmon driver

[richard.dorsch]

From: Richard Vidal-Dorsch <richard.dorsch@gmail.com>

Signed-off-by: Richard Vidal-Dorsch <richard.dorsch@gmail.com>
---
 Documentation/hwmon/imanager       |   59 ++
 drivers/hwmon/Kconfig              |   12 +
 drivers/hwmon/Makefile             |    2 +
 drivers/hwmon/imanager-ec-hwmon.c  |  606 +++++++++++++++++++++
 drivers/hwmon/imanager-hwmon.c     | 1058 ++++++++++++++++++++++++++++++++++++
 include/linux/mfd/imanager/hwmon.h |  120 ++++
 6 files changed, 1857 insertions(+)
 create mode 100644 Documentation/hwmon/imanager
 create mode 100644 drivers/hwmon/imanager-ec-hwmon.c
 create mode 100644 drivers/hwmon/imanager-hwmon.c
 create mode 100644 include/linux/mfd/imanager/hwmon.h

diff --git a/Documentation/hwmon/imanager b/Documentation/hwmon/imanager
new file mode 100644
index 0000000..0705cf9
--- /dev/null
+++ b/Documentation/hwmon/imanager
@@ -0,0 +1,59 @@
+Kernel driver imanager_hwmon
+============================
+
+This platform driver provides support for iManager Hardware Monitoring
+and FAN control.
+
+This driver depends on imanager (mfd).
+
+Description
+-----------
+
+This driver provides support for the Advantech iManager Hardware Monitoring EC.
+
+The Advantech iManager supports up to 3 fan rotation speed sensors,
+3 temperature monitoring sources and up to 5 voltage sensors, VID, alarms and
+a automatic fan regulation strategy (as well as manual fan control mode).
+
+Temperatures are measured in degrees Celsius and measurement resolution is
+1 degC. An Alarm is triggered when the temperature gets higher than the high
+limit; it stays on until the temperature falls below the high limit.
+
+Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
+triggered if the rotation speed has dropped below a programmable limit. No fan
+speed divider support available.
+
+Voltage sensors (also known as IN sensors) report their values in millivolts.
+An alarm is triggered if the voltage has crossed a programmable minimum
+or maximum limit.
+
+The driver supports automatic fan control mode known as Thermal Cruise.
+In this mode, the firmware attempts to keep the measured temperature in a
+predefined temperature range. If the temperature goes out of range, fan
+is driven slower/faster to reach the predefined range again.
+
+The mode works for fan1-fan3.
+
+sysfs attributes
+----------------
+
+pwm[1-3] - this file stores PWM duty cycle or DC value (fan speed) in range:
+	   0 (lowest speed) to 255 (full)
+
+pwm[1-3]_enable - this file controls mode of fan/temperature control:
+	* 0 Fan control disabled (fans set to maximum speed)
+	* 1 Manual mode, write to pwm[1-3] any value 0-255
+	* 2 "Fan Speed Cruise" mode
+
+pwm[1-3]_mode - controls if output is PWM or DC level
+        * 0 DC output
+        * 1 PWM output
+
+Speed Cruise mode (2)
+---------------------
+
+This mode tries to keep the fan speed constant within min/max speed.
+
+fan[1-3]_min - Minimum fan speed
+fan[1-3]_max - Maximum fan speed
+
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 80a73bf..776bb8a 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -613,6 +613,18 @@ config SENSORS_CORETEMP
 	  sensor inside your CPU. Most of the family 6 CPUs
 	  are supported. Check Documentation/hwmon/coretemp for details.
 
+config SENSORS_IMANAGER
+	tristate "Advantech iManager Hardware Monitoring"
+	depends on MFD_IMANAGER
+	select HWMON_VID
+	help
+	  This enables support for Advantech iManager hardware monitoring
+	  of some Advantech SOM, MIO, AIMB, and PCM modules/boards.
+	  Requires mfd-core and imanager-core to function properly.
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called imanager_hwmon.
+
 config SENSORS_IT87
 	tristate "ITE IT87xx and compatibles"
 	depends on !PPC
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 12a3239..53752bc 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -76,6 +76,8 @@ obj-$(CONFIG_SENSORS_IBMAEM)	+= ibmaem.o
 obj-$(CONFIG_SENSORS_IBMPEX)	+= ibmpex.o
 obj-$(CONFIG_SENSORS_IBMPOWERNV)+= ibmpowernv.o
 obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o
+imanager_hwmon-objs		:= imanager-hwmon.o imanager-ec-hwmon.o
+obj-$(CONFIG_SENSORS_IMANAGER)	+= imanager_hwmon.o
 obj-$(CONFIG_SENSORS_INA209)	+= ina209.o
 obj-$(CONFIG_SENSORS_INA2XX)	+= ina2xx.o
 obj-$(CONFIG_SENSORS_IT87)	+= it87.o
diff --git a/drivers/hwmon/imanager-ec-hwmon.c b/drivers/hwmon/imanager-ec-hwmon.c
new file mode 100644
index 0000000..1920835
--- /dev/null
+++ b/drivers/hwmon/imanager-ec-hwmon.c
@@ -0,0 +1,606 @@
+/*
+ * Advantech iManager Hardware Monitoring core
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/bug.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/byteorder/generic.h>
+#include <linux/swab.h>
+#include <linux/mfd/imanager/ec.h>
+#include <linux/mfd/imanager/hwmon.h>
+
+#define HWM_STATUS_UNDEFINED_ITEM	2UL
+#define HWM_STATUS_UNDEFINED_DID	3UL
+#define HWM_STATUS_UNDEFINED_HWPIN	4UL
+
+/*
+ * FAN defs
+ */
+
+struct fan_dev_config {
+	u8	did,
+		hwpin,
+		tachoid,
+		status,
+		control,
+		temp_max,
+		temp_min,
+		temp_stop,
+		pwm_max,
+		pwm_min;
+	u16	rpm_max;
+	u16	rpm_min;
+	u8	debounce;	/* debounce time, not used */
+	u8	temp;		/* Current Thermal Zone Temperature */
+	u16	rpm_target;	/* RPM Target Speed, not used */
+};
+
+struct fan_status {
+	u32	sysctl	: 1,	/* System Control flag */
+		tacho	: 1,	/* FAN tacho source defined */
+		pulse	: 1,	/* FAN pulse type defined */
+		thermal	: 1,	/* Thermal zone init */
+		i2clink	: 1,	/* I2C protocol fail flag (thermal sensor) */
+		dnc	: 1,	/* don't care */
+		mode	: 2;	/* FAN Control mode */
+};
+
+struct fan_alert_limit {
+	u16	fan0_min,
+		fan0_max,
+		fan1_min,
+		fan1_max,
+		fan2_min,
+		fan2_max;
+};
+
+struct fan_alert_flag {
+	u32	fan0_min_alarm	: 1,
+		fan0_max_alarm	: 1,
+		fan1_min_alarm	: 1,
+		fan1_max_alarm	: 1,
+		fan2_min_alarm	: 1,
+		fan2_max_alarm	: 1,
+		dnc		: 2; /* don't care */
+};
+
+/*----------------------------------------------------*
+ * FAN Control bit field                              *
+ * enable:   0:Disabled, 1:Enabled                    *
+ * type:     0:PWM,      1:RPM                        *
+ * pulse:    0:Undefined 1:2 Pulse   2:4 Pulse        *
+ * tacho:    1:CPU FAN,  2:SYS1 FAN, 3:SYS2 FAN       *
+ * mode:     0:Off,      1:Full,     2:Manual, 3:Auto *
+ *- 7  6 ---- 5  4 --- 3  2 ----- 1 -------- 0 -------*
+ *  MODE   | TACHO  |  PULSE  |  TYPE  |    ENABLE    *
+ *----------------------------------------------------*/
+struct fan_ctrl {
+	u32	enable	: 1,	/* SmartFAN control on/off */
+		type	: 1,	/* FAN control type [0, 1] PWM/RPM */
+		pulse	: 2,	/* FAN pulse [0..2] */
+		tacho	: 2,	/* FAN Tacho Input [1..3] */
+		mode	: 2;	/* off/full/manual/auto */
+};
+
+enum fan_dev_ctrl {
+	CTRL_STATE = 3,
+	OPMODE,
+	IDSENSOR,
+	ACTIVE,
+	CTRL_MODE,
+};
+
+enum fan_limit {
+	LIMIT_PWM,
+	LIMIT_RPM,
+	LIMIT_TEMP,
+};
+
+static const char * const fan_temp_label[] = {
+	"Temp CPU",
+	"Temp SYS1",
+	"Temp SYS2",
+	NULL,
+};
+
+static const struct imanager_hwmon_device *hwmon;
+
+static inline int hwm_get_adc_value(u8 did)
+{
+	return imanager_read_word(EC_CMD_HWP_RD, did);
+}
+
+static inline int hwm_get_rpm_value(u8 did)
+{
+	return imanager_read_word(EC_CMD_HWP_RD, did);
+}
+
+static inline int hwm_get_pwm_value(u8 did)
+{
+	return imanager_read_byte(EC_CMD_HWP_RD, did);
+}
+
+static inline int hwm_set_pwm_value(u8 did, u8 val)
+{
+	return imanager_write_byte(EC_CMD_HWP_WR, did, val);
+}
+
+static int hwm_read_fan_config(int num, struct fan_dev_config *cfg)
+{
+	int ret;
+	struct ec_message msg = {
+		.rlen = 0xff, /* use alternative message body */
+		.wlen = 0,
+	};
+	struct fan_dev_config *_cfg = (struct fan_dev_config *)&msg.u.data;
+
+	if (WARN_ON(!cfg))
+		return -EINVAL;
+
+	memset(cfg, 0, sizeof(struct fan_dev_config));
+
+	ret = imanager_msg_read(EC_CMD_FAN_CTL_RD, num, &msg);
+	if (ret)
+		return ret;
+
+	if (!_cfg->did) {
+		pr_err("Invalid FAN%d device ID - possible firmware bug\n",
+			num);
+		return -ENODEV;
+	}
+
+	memcpy(cfg, &msg.u.data, sizeof(struct fan_dev_config));
+
+	return 0;
+}
+
+static int hwm_write_fan_config(int fnum, struct fan_dev_config *cfg)
+{
+	int ret;
+	struct ec_message msg = {
+		.rlen = 0,
+		.wlen = sizeof(struct fan_dev_config),
+	};
+
+	if (!cfg->did)
+		return -ENODEV;
+
+	msg.data = (u8 *)cfg;
+
+	ret = imanager_msg_write(EC_CMD_FAN_CTL_WR, fnum, &msg);
+	if (ret < 0)
+		return ret;
+
+	switch (ret) {
+	case 0:
+		break;
+	case HWM_STATUS_UNDEFINED_ITEM:
+	case HWM_STATUS_UNDEFINED_DID:
+	case HWM_STATUS_UNDEFINED_HWPIN:
+		return -EFAULT;
+	default:
+		pr_err("Unknown error status of fan%d (%d)\n", fnum, ret);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static inline void hwm_set_temp_limit(struct fan_dev_config *cfg,
+				      const struct hwm_fan_temp_limit *temp)
+{
+	cfg->temp_stop = temp->stop;
+	cfg->temp_min  = temp->min;
+	cfg->temp_max  = temp->max;
+}
+
+static inline void hwm_set_pwm_limit(struct fan_dev_config *cfg,
+				     const struct hwm_fan_limit *pwm)
+{
+	cfg->pwm_min = pwm->min;
+	cfg->pwm_max = pwm->max;
+}
+
+static inline void hwm_set_rpm_limit(struct fan_dev_config *cfg,
+				     const struct hwm_fan_limit *rpm)
+{
+	cfg->rpm_min = swab16(rpm->min);
+	cfg->rpm_max = swab16(rpm->max);
+}
+
+static inline void hwm_set_limit(struct fan_dev_config *cfg,
+				 const struct hwm_sensors_limit *limit)
+{
+	hwm_set_temp_limit(cfg, &limit->temp);
+	hwm_set_pwm_limit(cfg, &limit->pwm);
+	hwm_set_rpm_limit(cfg, &limit->rpm);
+}
+
+static int hwm_core_get_fan_alert_flag(struct fan_alert_flag *flag)
+{
+	int ret;
+	u8 *value = (u8 *)flag;
+
+	ret = imanager_acpiram_read_byte(EC_ACPIRAM_FAN_ALERT);
+	if (ret < 0)
+		return ret;
+
+	*value = ret;
+
+	return 0;
+}
+
+static int hwm_core_get_fan_alert_limit(int fnum,
+					struct hwm_smartfan *fan)
+{
+	int ret;
+	struct fan_alert_limit limit;
+	struct fan_alert_flag flag;
+
+	ret = imanager_acpiram_read_block(EC_ACPIRAM_FAN_SPEED_LIMIT,
+					 (u8 *)&limit, sizeof(limit));
+	if (ret < 0)
+		return ret;
+
+	ret = hwm_core_get_fan_alert_flag(&flag);
+	if (ret < 0)
+		return ret;
+
+	switch (fnum) {
+	case FAN_CPU:
+		fan->alert.min = swab16(limit.fan0_min);
+		fan->alert.max = swab16(limit.fan0_max);
+		fan->alert.min_alarm = flag.fan0_min_alarm;
+		fan->alert.max_alarm = flag.fan0_max_alarm;
+		break;
+	case FAN_SYS1:
+		fan->alert.min = swab16(limit.fan1_min);
+		fan->alert.max = swab16(limit.fan1_max);
+		fan->alert.min_alarm = flag.fan1_min_alarm;
+		fan->alert.max_alarm = flag.fan1_max_alarm;
+		break;
+	case FAN_SYS2:
+		fan->alert.min = swab16(limit.fan2_min);
+		fan->alert.max = swab16(limit.fan2_max);
+		fan->alert.min_alarm = flag.fan2_min_alarm;
+		fan->alert.max_alarm = flag.fan2_max_alarm;
+		break;
+	default:
+		pr_err("Unknown FAN ID %d\n", fnum);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int hwm_core_fan_set_alert_limit(int fnum,
+					struct hwm_fan_alert *alert)
+{
+	int ret;
+	struct fan_alert_limit limit;
+
+	ret = imanager_acpiram_read_block(EC_ACPIRAM_FAN_SPEED_LIMIT,
+					 (u8 *)&limit, sizeof(limit));
+	if (ret < 0)
+		return ret;
+
+	switch (fnum) {
+	case FAN_CPU:
+		limit.fan0_min = swab16(alert->min);
+		limit.fan0_max = swab16(alert->max);
+		break;
+	case FAN_SYS1:
+		limit.fan1_min = swab16(alert->min);
+		limit.fan1_max = swab16(alert->max);
+		break;
+	case FAN_SYS2:
+		limit.fan2_min = swab16(alert->min);
+		limit.fan2_max = swab16(alert->max);
+		break;
+	default:
+		pr_err("Unknown FAN ID %d\n", fnum);
+		return -EINVAL;
+	}
+
+	return imanager_acpiram_write_block(EC_ACPIRAM_FAN_SPEED_LIMIT,
+					   (u8 *)&limit, sizeof(limit));
+}
+
+/* HWM CORE API */
+
+const char *hwm_core_adc_get_label(int num)
+{
+	if (WARN_ON(num >= hwmon->adc.num))
+		return NULL;
+
+	return hwmon->adc.attr[num].label;
+}
+
+const char *hwm_core_fan_get_label(int num)
+{
+	if (WARN_ON(num >= hwmon->fan.num))
+		return NULL;
+
+	return hwmon->fan.attr[num].label;
+}
+
+const char *hwm_core_fan_get_temp_label(int num)
+{
+	if (WARN_ON(num >= hwmon->fan.num))
+		return NULL;
+
+	return fan_temp_label[num];
+}
+
+int hwm_core_adc_is_available(int num)
+{
+	if (num >= EC_HWM_MAX_ADC)
+		return -EINVAL;
+
+	return hwmon->adc.attr[num].did ? 0 : -ENODEV;
+}
+
+int hwm_core_adc_get_value(int num, struct hwm_voltage *volt)
+{
+	int ret;
+
+	volt->valid = false;
+
+	ret = hwm_core_adc_is_available(num);
+	if (ret < 0)
+		return ret;
+
+	ret = hwm_get_adc_value(hwmon->adc.attr[num].did);
+	if (ret < 0)
+		return ret;
+
+	volt->value = ret * hwmon->adc.attr[num].scale;
+	volt->valid = true;
+
+	return 0;
+}
+
+int hwm_core_fan_get_ctrl(int num, struct hwm_smartfan *fan)
+{
+	int ret;
+	struct fan_dev_config cfg;
+	struct fan_ctrl *ctrl = (struct fan_ctrl *)&cfg.control;
+
+	if (WARN_ON((num >= HWM_MAX_FAN) || !fan))
+		return -EINVAL;
+
+	memset(fan, 0, sizeof(struct hwm_smartfan));
+
+	ret = hwm_read_fan_config(num, &cfg);
+	if (ret < 0)
+		return ret;
+
+	fan->pulse = ctrl->pulse;
+	fan->type = ctrl->type;
+
+	/*
+	 * It seems that fan->mode does not always report the correct
+	 * FAN mode so the only way of reporting the current FAN mode
+	 * is to read back ctrl->mode.
+	 */
+	fan->mode = ctrl->mode;
+
+	ret = hwm_get_rpm_value(cfg.tachoid);
+	if (ret < 0) {
+		pr_err("Failed to read FAN speed\n");
+		return ret;
+	}
+
+	fan->speed = ret;
+
+	ret = hwm_get_pwm_value(hwmon->fan.attr[num].did);
+	if (ret < 0) {
+		pr_err("Failed to read FAN%d PWM\n", num);
+		return ret;
+	}
+
+	fan->pwm = ret;
+
+	fan->alarm = (fan->pwm && !fan->speed) ? 1 : 0;
+
+	fan->limit.temp.min	= cfg.temp_min;
+	fan->limit.temp.max	= cfg.temp_max;
+	fan->limit.temp.stop	= cfg.temp_stop;
+	fan->limit.pwm.min	= cfg.pwm_min;
+	fan->limit.pwm.max	= cfg.pwm_max;
+	fan->limit.rpm.min	= swab16(cfg.rpm_min);
+	fan->limit.rpm.max	= swab16(cfg.rpm_max);
+
+	ret = hwm_core_get_fan_alert_limit(num, fan);
+	if (ret)
+		return ret;
+
+	fan->valid = true;
+
+	return 0;
+}
+
+int hwm_core_fan_set_ctrl(int num, int fmode, int ftype, int pwm, int pulse,
+			  struct hwm_sensors_limit *limit,
+			  struct hwm_fan_alert *alert)
+{
+	int ret;
+	struct fan_dev_config cfg;
+	struct fan_ctrl *ctrl = (struct fan_ctrl *)&cfg.control;
+	struct hwm_sensors_limit _limit = { {0, 0, 0}, {0, 0}, {0, 0} };
+
+	if (WARN_ON(num >= HWM_MAX_FAN))
+		return -EINVAL;
+
+	ret = hwm_read_fan_config(num, &cfg);
+	if (ret < 0) {
+		pr_err("Failed while reading FAN %s config\n",
+			hwmon->fan.attr[num].label);
+		return ret;
+	}
+
+	if (!limit)
+		limit = &_limit;
+
+	switch (fmode) {
+	case MODE_OFF:
+		ctrl->type = CTRL_PWM;
+		ctrl->mode = MODE_OFF;
+		break;
+	case MODE_FULL:
+		ctrl->type = CTRL_PWM;
+		ctrl->mode = MODE_FULL;
+		break;
+	case MODE_MANUAL:
+		ctrl->type = CTRL_PWM;
+		ctrl->mode = MODE_MANUAL;
+		ret = hwm_set_pwm_value(hwmon->fan.attr[num].did, pwm);
+		if (ret < 0)
+			return ret;
+		break;
+	case MODE_AUTO:
+		switch (ftype) {
+		case CTRL_PWM:
+			limit->rpm.min = 0;
+			limit->rpm.max = 0;
+			ctrl->type = CTRL_PWM;
+			break;
+		case CTRL_RPM:
+			limit->pwm.min = 0;
+			limit->pwm.max = 0;
+			ctrl->type = CTRL_RPM;
+			break;
+		default:
+			return -EINVAL;
+		}
+		ctrl->mode = MODE_AUTO;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	hwm_set_limit(&cfg, limit);
+
+	ctrl->pulse = (pulse && (pulse < 3)) ? pulse : 0;
+	ctrl->enable = 1;
+
+	ret = hwm_write_fan_config(num, &cfg);
+	if (ret < 0)
+		return ret;
+
+	if (alert)
+		return hwm_core_fan_set_alert_limit(num, alert);
+
+	return 0;
+}
+
+int hwm_core_fan_is_available(int num)
+{
+	if (WARN_ON(num >= HWM_MAX_FAN))
+		return -EINVAL;
+
+	return hwmon->fan.active & (1 << num) &&
+		hwmon->fan.attr[num].did ? 0 : -ENODEV;
+}
+
+static int hwm_core_fan_set_limit(int num, int fan_limit,
+				  struct hwm_sensors_limit *limit)
+{
+	struct fan_dev_config cfg;
+	int ret;
+
+	if (WARN_ON(num >= HWM_MAX_FAN))
+		return -EINVAL;
+
+	ret = hwm_read_fan_config(num, &cfg);
+	if (ret < 0) {
+		pr_err("Failed while reading FAN %s config\n",
+			hwmon->fan.attr[num].label);
+		return ret;
+	}
+
+	switch (fan_limit) {
+	case LIMIT_PWM:
+		hwm_set_pwm_limit(&cfg, &limit->pwm);
+		break;
+	case LIMIT_RPM:
+		hwm_set_rpm_limit(&cfg, &limit->rpm);
+		break;
+	case LIMIT_TEMP:
+		hwm_set_temp_limit(&cfg, &limit->temp);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return hwm_write_fan_config(num, &cfg);
+}
+
+int hwm_core_fan_set_rpm_limit(int num, int min, int max)
+{
+	struct hwm_sensors_limit limit = {
+		.rpm = {
+			.min = min,
+			.max = max,
+		},
+	};
+
+	return hwm_core_fan_set_limit(num, LIMIT_RPM, &limit);
+}
+
+int hwm_core_fan_set_pwm_limit(int num, int min, int max)
+{
+	struct hwm_sensors_limit limit = {
+		.pwm = {
+			.min = min,
+			.max = max,
+		},
+	};
+
+	return hwm_core_fan_set_limit(num, LIMIT_PWM, &limit);
+}
+
+int hwm_core_fan_set_temp_limit(int num, int stop, int min, int max)
+{
+	struct hwm_sensors_limit limit = {
+		.temp = {
+			.stop = stop,
+			.min = min,
+			.max = max,
+		},
+	};
+
+	return hwm_core_fan_set_limit(num, LIMIT_TEMP, &limit);
+}
+
+int hwm_core_adc_get_max_count(void)
+{
+	return hwmon->adc.num;
+}
+
+int hwm_core_fan_get_max_count(void)
+{
+	return hwmon->fan.num;
+}
+
+int hwm_core_init(void)
+{
+	hwmon = imanager_get_hwmon_device();
+	if (!hwmon)
+		return -ENODEV;
+
+	return 0;
+}
+
diff --git a/drivers/hwmon/imanager-hwmon.c b/drivers/hwmon/imanager-hwmon.c
new file mode 100644
index 0000000..b8ad562
--- /dev/null
+++ b/drivers/hwmon/imanager-hwmon.c
@@ -0,0 +1,1058 @@
+/*
+ * Advantech iManager Hardware Monitoring driver
+ * Derived from nct6775 driver
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon-vid.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+#include <linux/mfd/imanager/core.h>
+#include <linux/mfd/imanager/hwmon.h>
+
+struct imanager_hwmon_data {
+	struct imanager_device_data *idev;
+	bool valid;	/* if set, below values are valid */
+	struct hwm_data hwm;
+	int adc_num;
+	int fan_num;
+	unsigned long samples;
+	unsigned long last_updated;
+	const struct attribute_group *groups[3];
+};
+
+static inline u32 in_from_reg(u16 val)
+{
+	return clamp_val(DIV_ROUND_CLOSEST(val * SCALE_IN, 1000), 0, 65535);
+}
+
+static inline u16 in_to_reg(u32 val)
+{
+	return clamp_val(DIV_ROUND_CLOSEST(val * 1000, SCALE_IN), 0, 65535);
+}
+
+static struct imanager_hwmon_data *
+imanager_hwmon_update_device(struct device *dev)
+{
+	struct imanager_hwmon_data *data = dev_get_drvdata(dev);
+	int i;
+
+	mutex_lock(&data->idev->lock);
+
+	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
+	    || !data->valid) {
+		/* Measured voltages */
+		for (i = 0; i < data->adc_num; i++)
+			hwm_core_adc_get_value(i, &data->hwm.volt[i]);
+
+		/* Measured fan speeds */
+		for (i = 0; i < data->fan_num; i++)
+			hwm_core_fan_get_ctrl(i, &data->hwm.fan[i]);
+
+		data->last_updated = jiffies;
+		data->valid = true;
+	}
+
+	mutex_unlock(&data->idev->lock);
+
+	return data;
+}
+
+static ssize_t
+show_in(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+
+	return sprintf(buf, "%u\n", in_from_reg(adc->value));
+}
+
+static ssize_t
+show_in_min(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+
+	return sprintf(buf, "%u\n", in_from_reg(adc->min));
+}
+
+static ssize_t
+show_in_max(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+
+	return sprintf(buf, "%u\n", in_from_reg(adc->max));
+}
+
+static ssize_t
+store_in_min(struct device *dev, struct device_attribute *attr,
+	     const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	mutex_lock(&data->idev->lock);
+
+	adc->min = in_to_reg(val);
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+store_in_max(struct device *dev, struct device_attribute *attr,
+	     const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	mutex_lock(&data->idev->lock);
+
+	adc->max = in_to_reg(val);
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+show_in_alarm(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+	int val = 0;
+
+	if (adc->valid)
+		val = (adc->value < adc->min) || (adc->value > adc->max);
+
+	return sprintf(buf, "%u\n", val);
+}
+
+static ssize_t
+show_in_average(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+
+	if (adc->average)
+		adc->average =
+			DIV_ROUND_CLOSEST(adc->average * data->samples +
+					  adc->value, ++data->samples);
+	else {
+		adc->average = adc->value;
+		data->samples = 1;
+	}
+
+	return sprintf(buf, "%u\n", in_from_reg(adc->average));
+}
+
+static ssize_t
+show_in_lowest(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+
+	if (!adc->lowest)
+		adc->lowest = adc->highest = adc->value;
+	else if (adc->value < adc->lowest)
+		adc->lowest = adc->value;
+
+	return sprintf(buf, "%u\n", in_from_reg(adc->lowest));
+}
+
+static ssize_t
+show_in_highest(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+
+	if (!adc->highest)
+		adc->highest = adc->value;
+	else if (adc->value > adc->highest)
+		adc->highest = adc->value;
+
+	return sprintf(buf, "%u\n", in_from_reg(adc->highest));
+}
+
+static ssize_t
+store_in_reset_history(struct device *dev, struct device_attribute *attr,
+		       const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_voltage *adc = &data->hwm.volt[index];
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	mutex_lock(&data->idev->lock);
+
+	if (val == 1) {
+		adc->lowest = 0;
+		adc->highest = 0;
+	} else {
+		count = -EINVAL;
+	}
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+show_temp(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_smartfan *fan = &data->hwm.fan[index - 1];
+
+	return sprintf(buf, "%u\n", fan->temp * 1000);
+}
+
+static ssize_t
+show_fan_in(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_smartfan *fan = &data->hwm.fan[index - 1];
+
+	return sprintf(buf, "%u\n", fan->valid ? fan->speed : 0);
+}
+
+static inline int is_alarm(const struct hwm_smartfan *fan)
+{
+	/*
+	 * Do not set ALARM flag if FAN is in speed cruise mode (3)
+	 * as this mode automatically turns on the FAN
+	 * Set ALARM flag when pwm is set but speed is 0 as this
+	 * could be a defective FAN or no FAN is present
+	 */
+	return (!fan->valid ||
+		((fan->mode == MODE_AUTO) && fan->alarm) ||
+		(fan->speed > fan->limit.rpm.max));
+}
+
+static ssize_t
+show_fan_alarm(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_smartfan *fan = &data->hwm.fan[index - 1];
+
+	return sprintf(buf, "%u\n", fan->valid ? is_alarm(fan) : 0);
+}
+
+static ssize_t
+show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_fan_limit *rpm = &data->hwm.fan[index - 1].limit.rpm;
+
+	return sprintf(buf, "%u\n", rpm->min);
+}
+
+static ssize_t
+show_fan_max(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_fan_limit *rpm = &data->hwm.fan[index - 1].limit.rpm;
+
+	return sprintf(buf, "%u\n", rpm->max);
+}
+
+static ssize_t
+store_fan_min(struct device *dev, struct device_attribute *attr,
+	      const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_smartfan *fan = &data->hwm.fan[index - 1];
+	struct hwm_fan_limit *rpm = &fan->limit.rpm;
+	unsigned long val = 0;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	/* do not apply value if not in 'fan cruise mode' */
+	if (fan->mode != MODE_AUTO)
+		return -EINVAL;
+
+	mutex_lock(&data->idev->lock);
+
+	hwm_core_fan_set_rpm_limit(index - 1, val, rpm->max);
+	hwm_core_fan_get_ctrl(index - 1, fan); /* update */
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+store_fan_max(struct device *dev, struct device_attribute *attr,
+	      const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_smartfan *fan = &data->hwm.fan[index - 1];
+	struct hwm_fan_limit *rpm = &fan->limit.rpm;
+	unsigned long val = 0;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	/* do not apply value if not in 'fan cruise mode' */
+	if (fan->mode != MODE_AUTO)
+		return -EINVAL;
+
+	mutex_lock(&data->idev->lock);
+
+	hwm_core_fan_set_rpm_limit(index - 1, rpm->min, val);
+	hwm_core_fan_get_ctrl(index - 1, fan);
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	u32 val = DIV_ROUND_CLOSEST(data->hwm.fan[index - 1].pwm * 255, 100);
+
+	return sprintf(buf, "%u\n", val);
+}
+
+static ssize_t
+store_pwm(struct device *dev, struct device_attribute *attr,
+	  const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_smartfan *fan = &data->hwm.fan[index - 1];
+	unsigned long val = 0;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	val = DIV_ROUND_CLOSEST(val * 100, 255);
+
+	mutex_lock(&data->idev->lock);
+
+	switch (fan->mode) {
+	case MODE_MANUAL:
+		hwm_core_fan_set_ctrl(index - 1, MODE_MANUAL, CTRL_PWM,
+				      val, 0, NULL, NULL);
+		break;
+	case MODE_AUTO:
+		if (fan->type == CTRL_RPM)
+			break;
+		hwm_core_fan_set_ctrl(index - 1, MODE_AUTO, CTRL_PWM,
+				      val, 0, &fan->limit, &fan->alert);
+		break;
+	}
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+show_pwm_min(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+
+	return sprintf(buf, "%u\n", data->hwm.fan[index - 1].limit.pwm.min);
+}
+
+static ssize_t
+show_pwm_max(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+
+	return sprintf(buf, "%u\n", data->hwm.fan[index - 1].limit.pwm.max);
+}
+
+static ssize_t
+show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int nr = to_sensor_dev_attr(attr)->index - 1;
+	struct hwm_smartfan *fan = &data->hwm.fan[nr];
+
+	if (fan->mode == MODE_OFF)
+		return -EINVAL;
+
+	return sprintf(buf, "%u\n", fan->mode - 1);
+}
+
+static ssize_t
+store_pwm_enable(struct device *dev, struct device_attribute *attr,
+		 const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int nr = to_sensor_dev_attr(attr)->index - 1;
+	struct hwm_smartfan *fan = &data->hwm.fan[nr];
+	unsigned long mode = 0;
+	int err;
+
+	err = kstrtoul(buf, 10, &mode);
+	if (err < 0)
+		return err;
+
+	if (mode > MODE_AUTO)
+		return -EINVAL;
+
+	mutex_lock(&data->idev->lock);
+
+	switch (mode) {
+	case 0:
+		if (mode != 0)
+			hwm_core_fan_set_ctrl(nr, MODE_FULL, CTRL_PWM, 100,
+					      fan->pulse, NULL, NULL);
+		break;
+	case 1:
+		if (mode != 1)
+			hwm_core_fan_set_ctrl(nr, MODE_MANUAL, CTRL_PWM, 0,
+					      fan->pulse, NULL, NULL);
+		break;
+	case 2:
+		if (mode != 2)
+			hwm_core_fan_set_ctrl(nr, MODE_AUTO, fan->type, 0,
+					      fan->pulse, &fan->limit, NULL);
+		break;
+	}
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_smartfan *fan = &data->hwm.fan[index - 1];
+
+	if (fan->mode == MODE_OFF)
+		return -EINVAL;
+
+	return sprintf(buf, "%u\n", fan->type == CTRL_PWM ? 1 : 0);
+}
+
+static ssize_t
+store_pwm_mode(struct device *dev, struct device_attribute *attr,
+	       const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int nr = to_sensor_dev_attr(attr)->index - 1;
+	struct hwm_smartfan *fan = &data->hwm.fan[nr];
+	unsigned long val = 0;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	if (fan->mode != MODE_AUTO)
+		return -EINVAL;
+
+	mutex_lock(&data->idev->lock);
+
+	hwm_core_fan_set_ctrl(nr, fan->mode, val ? CTRL_RPM : CTRL_PWM,
+			      fan->pwm, fan->pulse, &fan->limit, &fan->alert);
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+show_temp_min(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int nr = to_sensor_dev_attr(attr)->index - 1;
+	int val = data->hwm.fan[nr].limit.temp.min;
+
+	return sprintf(buf, "%d\n", val * 1000);
+}
+
+static ssize_t
+show_temp_max(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int nr = to_sensor_dev_attr(attr)->index - 1;
+	int val = data->hwm.fan[nr].limit.temp.max;
+
+	return sprintf(buf, "%u\n", val * 1000);
+}
+
+static ssize_t
+show_temp_alarm(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int nr = to_sensor_dev_attr(attr)->index - 1;
+	struct hwm_smartfan *fan = &data->hwm.fan[nr];
+	struct hwm_fan_temp_limit *temp = &fan->limit.temp;
+
+	return sprintf(buf, "%u\n", (fan->temp && (fan->temp >= temp->max)));
+}
+
+static ssize_t
+store_temp_min(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int nr = to_sensor_dev_attr(attr)->index - 1;
+	struct hwm_smartfan *fan = &data->hwm.fan[nr];
+	struct hwm_fan_temp_limit *temp = &fan->limit.temp;
+	long val = 0;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	val = DIV_ROUND_CLOSEST(val, 1000);
+
+	if (val > 100)
+		return -EINVAL;
+
+	/* do not apply value if not in 'fan cruise mode' */
+	if (fan->mode != MODE_AUTO)
+		return -EINVAL;
+
+	/* The EC imanager provides three different temperature limit values
+	 * (stop, min, and max) where stop indicates a minimum temp value
+	 * (threshold) from which the FAN will turn off.  We are setting
+	 * temp_stop to the same value as temp_min.
+	 */
+
+	mutex_lock(&data->idev->lock);
+
+	hwm_core_fan_set_temp_limit(nr, val, val, temp->max);
+	hwm_core_fan_get_ctrl(nr, fan);
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+store_temp_max(struct device *dev, struct device_attribute *attr,
+	       const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int nr = to_sensor_dev_attr(attr)->index - 1;
+	struct hwm_smartfan *fan = &data->hwm.fan[nr];
+	struct hwm_fan_temp_limit *temp = &fan->limit.temp;
+	long val = 0;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	val = DIV_ROUND_CLOSEST(val, 1000);
+
+	if (val > 100)
+		return -EINVAL;
+
+	/* do not apply value if not in 'fan cruise mode' */
+	if (fan->mode != MODE_AUTO)
+		return -EINVAL;
+
+	mutex_lock(&data->idev->lock);
+
+	hwm_core_fan_set_temp_limit(nr, temp->stop, temp->min, val);
+	hwm_core_fan_get_ctrl(nr, fan);
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+store_pwm_min(struct device *dev, struct device_attribute *attr,
+	      const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_fan_limit *pwm = &data->hwm.fan[index - 1].limit.pwm;
+	long val = 0;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	val = DIV_ROUND_CLOSEST(val * 100, 255);
+
+	if (val > 100)
+		return -EINVAL;
+
+	mutex_lock(&data->idev->lock);
+
+	hwm_core_fan_set_pwm_limit(index - 1, val, pwm->max);
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+store_pwm_max(struct device *dev, struct device_attribute *attr,
+	      const char *buf, size_t count)
+{
+	struct imanager_hwmon_data *data = imanager_hwmon_update_device(dev);
+	int index = to_sensor_dev_attr(attr)->index;
+	struct hwm_fan_limit *pwm = &data->hwm.fan[index - 1].limit.pwm;
+	long val = 0;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	val = DIV_ROUND_CLOSEST(val * 100, 255);
+
+	if (val > 100)
+		return -EINVAL;
+
+	mutex_lock(&data->idev->lock);
+
+	hwm_core_fan_set_pwm_limit(index - 1, pwm->min, val);
+
+	mutex_unlock(&data->idev->lock);
+
+	return count;
+}
+
+static ssize_t
+show_in_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+
+	return sprintf(buf, "%s\n", hwm_core_adc_get_label(index));
+}
+
+static ssize_t
+show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+
+	return sprintf(buf, "%s\n", hwm_core_fan_get_temp_label(index - 1));
+}
+
+static ssize_t
+show_fan_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+
+	return sprintf(buf, "%s\n", hwm_core_fan_get_label(index - 1));
+}
+
+/*
+ * Sysfs callback functions
+ */
+
+static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
+static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
+static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min,
+			  store_in_min, 0);
+static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max,
+			  store_in_max, 0);
+static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_in_alarm, NULL, 0);
+
+static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
+static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min,
+			  store_in_min, 1);
+static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max,
+			  store_in_max, 1);
+static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_in_alarm, NULL, 1);
+
+static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
+static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min,
+			  store_in_min, 2);
+static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max,
+			  store_in_max, 2);
+static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_in_alarm, NULL, 2);
+
+static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_temp_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, show_temp_min,
+			  store_temp_min, 1);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp_max,
+			  store_temp_max, 1);
+static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_temp_alarm, NULL, 1);
+
+static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_temp_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, show_temp_min,
+			  store_temp_min, 2);
+static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, show_temp_max,
+			  store_temp_max, 2);
+static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_temp_alarm, NULL, 2);
+
+static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, show_temp_label, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO | S_IWUSR, show_temp_min,
+			  store_temp_min, 3);
+static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO | S_IWUSR, show_temp_max,
+			  store_temp_max, 3);
+static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp_alarm, NULL, 3);
+
+static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, show_fan_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_in, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
+			  store_fan_min, 1);
+static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
+			  store_fan_max, 1);
+static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 1);
+
+static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, show_fan_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_in, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
+			  store_fan_min, 2);
+static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
+			  store_fan_max, 2);
+static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 2);
+
+static SENSOR_DEVICE_ATTR(fan3_label, S_IRUGO, show_fan_label, NULL, 3);
+static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_in, NULL, 3);
+static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
+			  store_fan_min, 3);
+static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
+			  store_fan_max, 3);
+static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 3);
+
+static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1);
+static SENSOR_DEVICE_ATTR(pwm1_min, S_IWUSR | S_IRUGO, show_pwm_min,
+			  store_pwm_min, 1);
+static SENSOR_DEVICE_ATTR(pwm1_max, S_IWUSR | S_IRUGO, show_pwm_max,
+			  store_pwm_max, 1);
+static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
+			  store_pwm_enable, 1);
+static SENSOR_DEVICE_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
+			  store_pwm_mode, 1);
+
+static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 2);
+static SENSOR_DEVICE_ATTR(pwm2_min, S_IWUSR | S_IRUGO, show_pwm_min,
+			  store_pwm_min, 2);
+static SENSOR_DEVICE_ATTR(pwm2_max, S_IWUSR | S_IRUGO, show_pwm_max,
+			  store_pwm_max, 2);
+static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
+			  store_pwm_enable, 2);
+static SENSOR_DEVICE_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
+			  store_pwm_mode, 2);
+
+static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 3);
+static SENSOR_DEVICE_ATTR(pwm3_min, S_IWUSR | S_IRUGO, show_pwm_min,
+			  store_pwm_min, 3);
+static SENSOR_DEVICE_ATTR(pwm3_max, S_IWUSR | S_IRUGO, show_pwm_max,
+			  store_pwm_max, 3);
+static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
+			  store_pwm_enable, 3);
+static SENSOR_DEVICE_ATTR(pwm3_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
+			  store_pwm_mode, 3);
+
+static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, show_in, NULL, 4);
+static SENSOR_DEVICE_ATTR(curr1_min, S_IWUSR | S_IRUGO, show_in_min,
+			  store_in_min, 4);
+static SENSOR_DEVICE_ATTR(curr1_max, S_IWUSR | S_IRUGO, show_in_max,
+			  store_in_max, 4);
+static SENSOR_DEVICE_ATTR(curr1_alarm, S_IRUGO, show_in_alarm, NULL, 4);
+static SENSOR_DEVICE_ATTR(curr1_average, S_IRUGO, show_in_average, NULL, 4);
+static SENSOR_DEVICE_ATTR(curr1_lowest, S_IRUGO, show_in_lowest, NULL, 4);
+static SENSOR_DEVICE_ATTR(curr1_highest, S_IRUGO, show_in_highest, NULL, 4);
+static SENSOR_DEVICE_ATTR(curr1_reset_history, S_IWUSR, NULL,
+			  store_in_reset_history, 4);
+
+static SENSOR_DEVICE_ATTR(cpu0_vid, S_IRUGO, show_in, NULL, 3);
+
+static struct attribute *imanager_in_attributes[] = {
+	&sensor_dev_attr_in0_label.dev_attr.attr,
+	&sensor_dev_attr_in0_input.dev_attr.attr,
+	&sensor_dev_attr_in0_min.dev_attr.attr,
+	&sensor_dev_attr_in0_max.dev_attr.attr,
+	&sensor_dev_attr_in0_alarm.dev_attr.attr,
+
+	&sensor_dev_attr_in1_label.dev_attr.attr,
+	&sensor_dev_attr_in1_input.dev_attr.attr,
+	&sensor_dev_attr_in1_min.dev_attr.attr,
+	&sensor_dev_attr_in1_max.dev_attr.attr,
+	&sensor_dev_attr_in1_alarm.dev_attr.attr,
+
+	&sensor_dev_attr_in2_label.dev_attr.attr,
+	&sensor_dev_attr_in2_input.dev_attr.attr,
+	&sensor_dev_attr_in2_min.dev_attr.attr,
+	&sensor_dev_attr_in2_max.dev_attr.attr,
+	&sensor_dev_attr_in2_alarm.dev_attr.attr,
+
+	NULL
+};
+
+static umode_t
+imanager_in_is_visible(struct kobject *kobj, struct attribute *attr, int index)
+{
+	int max_count = hwm_core_adc_get_max_count();
+
+	if (max_count >= 3)
+		return attr->mode;
+
+	return 0;
+}
+
+static const struct attribute_group imanager_group_in = {
+	.attrs = imanager_in_attributes,
+	.is_visible = imanager_in_is_visible,
+};
+
+static struct attribute *imanager_other_attributes[] = {
+	&sensor_dev_attr_curr1_input.dev_attr.attr,
+	&sensor_dev_attr_curr1_min.dev_attr.attr,
+	&sensor_dev_attr_curr1_max.dev_attr.attr,
+	&sensor_dev_attr_curr1_alarm.dev_attr.attr,
+	&sensor_dev_attr_curr1_average.dev_attr.attr,
+	&sensor_dev_attr_curr1_lowest.dev_attr.attr,
+	&sensor_dev_attr_curr1_highest.dev_attr.attr,
+	&sensor_dev_attr_curr1_reset_history.dev_attr.attr,
+
+	&sensor_dev_attr_cpu0_vid.dev_attr.attr,
+
+	NULL
+};
+
+static umode_t
+imanager_other_is_visible(struct kobject *kobj,
+			  struct attribute *attr, int index)
+{
+	int max_count = hwm_core_adc_get_max_count();
+
+	/*
+	 * There are either 3 or 5 VINs
+	 * vin3 is current monitoring
+	 * vin4 is CPU VID
+	 */
+	if (max_count > 3)
+		return attr->mode;
+
+	return 0;
+}
+
+static const struct attribute_group imanager_group_other = {
+	.attrs = imanager_other_attributes,
+	.is_visible = imanager_other_is_visible,
+};
+
+static struct attribute *imanager_fan_attributes[] = {
+	&sensor_dev_attr_fan1_label.dev_attr.attr,
+	&sensor_dev_attr_fan1_input.dev_attr.attr,
+	&sensor_dev_attr_fan1_min.dev_attr.attr,
+	&sensor_dev_attr_fan1_max.dev_attr.attr,
+	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
+
+	&sensor_dev_attr_fan2_label.dev_attr.attr,
+	&sensor_dev_attr_fan2_input.dev_attr.attr,
+	&sensor_dev_attr_fan2_min.dev_attr.attr,
+	&sensor_dev_attr_fan2_max.dev_attr.attr,
+	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
+
+	&sensor_dev_attr_fan3_label.dev_attr.attr,
+	&sensor_dev_attr_fan3_input.dev_attr.attr,
+	&sensor_dev_attr_fan3_min.dev_attr.attr,
+	&sensor_dev_attr_fan3_max.dev_attr.attr,
+	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
+
+	&sensor_dev_attr_temp1_label.dev_attr.attr,
+	&sensor_dev_attr_temp1_input.dev_attr.attr,
+	&sensor_dev_attr_temp1_min.dev_attr.attr,
+	&sensor_dev_attr_temp1_max.dev_attr.attr,
+	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
+
+	&sensor_dev_attr_temp2_label.dev_attr.attr,
+	&sensor_dev_attr_temp2_input.dev_attr.attr,
+	&sensor_dev_attr_temp2_min.dev_attr.attr,
+	&sensor_dev_attr_temp2_max.dev_attr.attr,
+	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
+
+	&sensor_dev_attr_temp3_label.dev_attr.attr,
+	&sensor_dev_attr_temp3_input.dev_attr.attr,
+	&sensor_dev_attr_temp3_min.dev_attr.attr,
+	&sensor_dev_attr_temp3_max.dev_attr.attr,
+	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
+
+	&sensor_dev_attr_pwm1.dev_attr.attr,
+	&sensor_dev_attr_pwm1_min.dev_attr.attr,
+	&sensor_dev_attr_pwm1_max.dev_attr.attr,
+	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
+	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
+
+	&sensor_dev_attr_pwm2.dev_attr.attr,
+	&sensor_dev_attr_pwm2_min.dev_attr.attr,
+	&sensor_dev_attr_pwm2_max.dev_attr.attr,
+	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
+	&sensor_dev_attr_pwm2_mode.dev_attr.attr,
+
+	&sensor_dev_attr_pwm3.dev_attr.attr,
+	&sensor_dev_attr_pwm3_min.dev_attr.attr,
+	&sensor_dev_attr_pwm3_max.dev_attr.attr,
+	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
+	&sensor_dev_attr_pwm3_mode.dev_attr.attr,
+
+	NULL
+};
+
+static umode_t
+imanager_fan_is_visible(struct kobject *kobj, struct attribute *attr, int index)
+{
+	int err;
+
+	if ((index >= 0) && (index <= 14)) { /* fan */
+		err = hwm_core_fan_is_available(index / 5);
+		if (err < 0)
+			return 0;
+	} else if ((index >= 15) && (index <= 29)) { /* temp */
+		err = hwm_core_fan_is_available((index - 15) / 5);
+		if (err < 0)
+			return 0;
+	} else if ((index >= 30) && (index <= 34)) { /* pwm */
+		err = hwm_core_fan_is_available((index - 30) / 5);
+		if (err < 0)
+			return 0;
+	}
+
+	return attr->mode;
+}
+
+static const struct attribute_group imanager_group_fan = {
+	.attrs = imanager_fan_attributes,
+	.is_visible = imanager_fan_is_visible,
+};
+
+/*
+ * Module stuff
+ */
+static int imanager_hwmon_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct imanager_device_data *idev = dev_get_drvdata(dev->parent);
+	struct imanager_hwmon_data *data;
+	struct device *hwmon_dev;
+	int err, i, num_attr_groups = 0;
+
+	if (!idev) {
+		dev_err(dev, "Invalid platform data\n");
+		return -EINVAL;
+	}
+
+	err = hwm_core_init();
+	if (err) {
+		dev_err(dev, "Hwmon core init failed\n");
+		return -EIO;
+	}
+
+	data = devm_kzalloc(dev, sizeof(struct imanager_hwmon_data),
+			    GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->idev = idev;
+	platform_set_drvdata(pdev, data);
+
+	data->adc_num = hwm_core_adc_get_max_count();
+	data->fan_num = hwm_core_fan_get_max_count();
+
+	for (i = 0; i < data->fan_num; i++) {
+		/* set active fan to automatic speed control */
+		hwm_core_fan_set_ctrl(i, MODE_AUTO, CTRL_RPM, 0, 0,
+				      NULL, NULL);
+		hwm_core_fan_get_ctrl(i, &data->hwm.fan[i]);
+	}
+
+	data->groups[num_attr_groups++] = &imanager_group_in;
+
+	if (data->adc_num > 3)
+		data->groups[num_attr_groups++] = &imanager_group_other;
+
+	if (data->fan_num)
+		data->groups[num_attr_groups++] = &imanager_group_fan;
+
+	hwmon_dev = devm_hwmon_device_register_with_groups(dev,
+				"imanager_hwmon", data, data->groups);
+
+	return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static struct platform_driver imanager_hwmon_driver = {
+	.driver = {
+		.owner = THIS_MODULE,
+		.name  = "imanager_hwmon",
+	},
+	.probe	= imanager_hwmon_probe,
+};
+
+module_platform_driver(imanager_hwmon_driver);
+
+MODULE_DESCRIPTION("Advantech iManager HWmon Driver");
+MODULE_AUTHOR("Richard Vidal-Dorsch <richard.dorsch at advantech.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imanager_hwmon");
diff --git a/include/linux/mfd/imanager/hwmon.h b/include/linux/mfd/imanager/hwmon.h
new file mode 100644
index 0000000..2a7e191
--- /dev/null
+++ b/include/linux/mfd/imanager/hwmon.h
@@ -0,0 +1,120 @@
+/*
+ * Advantech iManager Hardware Monitoring core
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __HWMON_H__
+#define __HWMON_H__
+
+#include <linux/types.h>
+
+#define HWM_MAX_ADC	5
+#define HWM_MAX_FAN	3
+
+/* Voltage computation (10-bit ADC, 0..3V input) */
+#define SCALE_IN	2933	/* (3000mV / (2^10 - 1)) * 1000 */
+
+/* Default Voltage Sensors */
+struct hwm_voltage {
+	bool valid;	/* if set, below values are valid */
+
+	int value;
+	int min;
+	int max;
+	int average;
+	int lowest;
+	int highest;
+
+};
+
+struct hwm_fan_temp_limit {
+	int stop;
+	int min;
+	int max;
+};
+
+struct hwm_fan_limit {
+	int min;
+	int max;
+};
+
+struct hwm_fan_alert {
+	int min;
+	int max;
+	int min_alarm;
+	int max_alarm;
+};
+
+struct hwm_sensors_limit {
+	struct hwm_fan_temp_limit temp;
+	struct hwm_fan_limit	  pwm;
+	struct hwm_fan_limit	  rpm;
+};
+
+struct hwm_smartfan {
+	bool valid;	/* if set, below values are valid */
+
+	int mode;
+	int type;
+	int pwm;
+	int speed;
+	int pulse;
+	int alarm;
+	int temp;
+
+	struct hwm_sensors_limit limit;
+	struct hwm_fan_alert	 alert;
+};
+
+struct hwm_data {
+	struct hwm_voltage	volt[HWM_MAX_ADC];
+	struct hwm_smartfan	fan[HWM_MAX_FAN];
+};
+
+enum fan_unit {
+	FAN_CPU,
+	FAN_SYS1,
+	FAN_SYS2,
+};
+
+enum fan_ctrl_type {
+	CTRL_PWM,
+	CTRL_RPM,
+};
+
+enum fan_mode {
+	MODE_OFF,
+	MODE_FULL,
+	MODE_MANUAL,
+	MODE_AUTO,
+};
+
+int hwm_core_init(void);
+
+int hwm_core_adc_is_available(int num);
+int hwm_core_adc_get_max_count(void);
+int hwm_core_adc_get_value(int num, struct hwm_voltage *volt);
+const char *hwm_core_adc_get_label(int num);
+
+int hwm_core_fan_is_available(int num);
+int hwm_core_fan_get_max_count(void);
+int hwm_core_fan_get_ctrl(int num, struct hwm_smartfan *fan);
+int hwm_core_fan_set_ctrl(int num, int fmode, int ftype, int pwm, int pulse,
+			  struct hwm_sensors_limit *limit,
+			  struct hwm_fan_alert *alert);
+
+int hwm_core_fan_set_rpm_limit(int num, int min, int max);
+int hwm_core_fan_set_pwm_limit(int num, int min, int max);
+int hwm_core_fan_set_temp_limit(int num, int stop, int min, int max);
+
+const char *hwm_core_fan_get_label(int num);
+const char *hwm_core_fan_get_temp_label(int num);
+
+#endif
-- 
2.6.4

[PATCH] fix platform_no_drv_owner.cocci warnings

[kbuild test robot]

drivers/hwmon/imanager-hwmon.c:1047:3-8: No need to set .owner here. The core will do it.

 Remove .owner field if calls are used which set it automatically

Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

CC: Richard Vidal-Dorsch <richard.dorsch@gmail.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---

 imanager-hwmon.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/hwmon/imanager-hwmon.c
+++ b/drivers/hwmon/imanager-hwmon.c
@@ -1044,7 +1044,6 @@ static int imanager_hwmon_probe(struct p
 
 static struct platform_driver imanager_hwmon_driver = {
 	.driver = {
-		.owner = THIS_MODULE,
 		.name  = "imanager_hwmon",
 	},
 	.probe	= imanager_hwmon_probe,

Re: [PATCH v2 1/6] Add Advantech iManager MFD core driver

[kbuild test robot]

Hi Richard,

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on v4.4-rc8 next-20160108]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/richard-dorsch-gmail-com/Add-Advantech-iManager-EC-driver-set/20160110-171635
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next


coccinelle warnings: (new ones prefixed by >>)

>> drivers/mfd/imanager-core.c:248:3-8: No need to set .owner here. The core will do it.

Please review and possibly fold the followup patch.

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[PATCH v2 1/6] Add Advantech iManager MFD core driver

[richard.dorsch-Re5JQEeQqe8AvxtiuMwx3w]

From: Richard Vidal-Dorsch <richard.dorsch-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

This patch adds Advantech iManager Embedded Controller MFD core driver.
This mfd core dirver provides an interface to GPIO, I2C, HWmon,
Watchdog, and Backlight/Brightness control.

Signed-off-by: Richard Vidal-Dorsch <richard.dorsch-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 Documentation/devicetree/bindings/mfd/imanager.txt |   33 +
 MAINTAINERS                                        |   13 +
 drivers/mfd/Kconfig                                |   20 +
 drivers/mfd/Makefile                               |    2 +
 drivers/mfd/imanager-core.c                        |  288 +++++
 drivers/mfd/imanager-ec.c                          | 1345 ++++++++++++++++++++
 include/linux/mfd/imanager/core.h                  |   31 +
 include/linux/mfd/imanager/ec.h                    |  210 +++
 8 files changed, 1942 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/imanager.txt
 create mode 100644 drivers/mfd/imanager-core.c
 create mode 100644 drivers/mfd/imanager-ec.c
 create mode 100644 include/linux/mfd/imanager/core.h
 create mode 100644 include/linux/mfd/imanager/ec.h

diff --git a/Documentation/devicetree/bindings/mfd/imanager.txt b/Documentation/devicetree/bindings/mfd/imanager.txt
new file mode 100644
index 0000000..bf58a96
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/imanager.txt
@@ -0,0 +1,33 @@
+Note
+====
+
+This is a set of platform drivers which provide support for multiple
+embedded features such as GPIO, I2C/SMBus, Hardware Monitoring, Watchdog,
+and Backlight/Brightness control. Those features are available on Advantech
+Embedded boards such as SOM, MIO, AIMB, and PCM.
+Datasheets of each product line can be downloaded from www.advantech.com
+
+Author:
+	Richard Vidal-Dorsch <richard.dorsch-ELdSlb/RfAS1Z/+hSey0Gg@public.gmane.org>
+
+
+Kernel driver imanager
+======================
+
+This driver provides a communication layer to the Advantech iManager EC
+firmware which is factory loaded onto ITE IT8518/28 chips. The type of
+communication is message based. Clients (gpio, i2c, hwmon etc. drivers)
+request data from Advantech iManager (polling, not interrupt driven). If
+a response is been received within a time frame, the data is been extracted
+from the message and then passed to the caller (clients).
+
+  Supported chips:
+  * Advantech EC based on ITE IT8518
+    Prefix: imanager
+    Addresses: 0x029e/0x029f
+    Datasheet: Available from ITE upon request
+  * Advantech EC based on ITE IT8528
+    Prefix: imanager
+    Addresses: 0x0299/0x29a
+    Datasheet: Available from ITE upon request
+
diff --git a/MAINTAINERS b/MAINTAINERS
index 233f834..8d25fdc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5391,6 +5391,19 @@ M:	Stanislaw Gruszka <stf_xl-5tc4TXWwyLM@public.gmane.org>
 S:	Maintained
 F:	drivers/usb/atm/ueagle-atm.c
 
+IMANAGER ADVANTECH EC DRIVER
+M:	Richard Vidal-Dorsch <richard.dorsch-ELdSlb/RfAS1Z/+hSey0Gg@public.gmane.org>
+S:	Maintained
+F:	Documentation/devicetree/bindings/mfd/imanager.txt
+F:	Documentation/hwmon/imanager
+F:	Documentation/i2c/busses/i2c-imanager
+F:	drivers/mfd/imanager-core.c
+F:	drivers/gpio/imanager-gpio.c
+F:	drivers/hwmon/imanager-hwmon.c
+F:	drivers/i2c/busses/imanager-i2c.c
+F:	drivers/video/backlight/imanager-bl.c
+F:	drivers/watchdog/imanager-wdt.c
+
 INA209 HARDWARE MONITOR DRIVER
 M:	Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
 L:	lm-sensors-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 4d92df6..4dc7c13 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -322,6 +322,26 @@ config MFD_INTEL_QUARK_I2C_GPIO
 	  their respective IO driver.
 	  The GPIO exports a total amount of 8 interrupt-capable GPIOs.
 
+config MFD_IMANAGER
+	tristate "Advantech iManager Embedded Controller"
+	depends on PCI
+	depends on X86
+	select MFD_CORE
+	help
+	  This is the core driver for Advantech iManager EC as found on some
+	  Advantech SOM, MIO, AIMB, and PCM modules/boards. The EC may provide
+	  functions like GPIO, I2C interface, HW monitoring, Watchdog, and
+	  backlight/brightness control.
+
+	  The following Advantech boards are supported:
+		* All SOM modules newer than SOM-5788
+		* MIO-5250/5251/5270/5271 and newer
+		* PCM-9388
+		* AIMB-274/231
+
+	  This driver can also be built as a module. If so, the module
+	  will be called imanager.
+
 config LPC_ICH
 	tristate "Intel ICH LPC"
 	depends on PCI
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index a8b76b8..c9c63d9 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -142,6 +142,8 @@ obj-$(CONFIG_MFD_DB8500_PRCMU)	+= db8500-prcmu.o
 obj-$(CONFIG_AB8500_CORE)	+= ab8500-core.o ab8500-sysctrl.o
 obj-$(CONFIG_MFD_TIMBERDALE)    += timberdale.o
 obj-$(CONFIG_PMIC_ADP5520)	+= adp5520.o
+imanager-objs			:= imanager-core.o imanager-ec.o
+obj-$(CONFIG_MFD_IMANAGER)	+= imanager.o
 obj-$(CONFIG_MFD_KEMPLD)	+= kempld-core.o
 obj-$(CONFIG_MFD_INTEL_QUARK_I2C_GPIO)	+= intel_quark_i2c_gpio.o
 obj-$(CONFIG_LPC_SCH)		+= lpc_sch.o
diff --git a/drivers/mfd/imanager-core.c b/drivers/mfd/imanager-core.c
new file mode 100644
index 0000000..9697c144
--- /dev/null
+++ b/drivers/mfd/imanager-core.c
@@ -0,0 +1,288 @@
+/*
+ * Advantech iManager MFD core driver
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch-ELdSlb/RfAS1Z/+hSey0Gg@public.gmane.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/imanager/core.h>
+#include <linux/mfd/imanager/ec.h>
+
+static struct platform_device *pdev;
+
+enum imanager_cells {
+	IMANAGER_BL,
+	IMANAGER_GPIO,
+	IMANAGER_HWMON,
+	IMANAGER_I2C,
+	IMANAGER_WDT,
+};
+
+static const char * const chip_names[] = {
+	"it8516",
+	"it8518",
+	"it8528",
+	NULL
+};
+
+static struct resource imanager_ioresource = {
+	.start  = IT8516_DAT_PORT,
+	.end    = IT8518_DAT_PORT,
+	.flags  = IORESOURCE_IO,
+};
+
+/*
+ * Devices which are part of the iManager and are available via firmware.
+ */
+static struct mfd_cell imanager_devs[] = {
+	[IMANAGER_BL] = {
+		.name = "imanager_backlight",
+	},
+	[IMANAGER_GPIO] = {
+		.name = "imanager_gpio",
+	},
+	[IMANAGER_HWMON] = {
+		.name = "imanager_hwmon",
+	},
+	[IMANAGER_I2C] = {
+		.name = "imanager_i2c",
+	},
+	[IMANAGER_WDT] = {
+		.name = "imanager_wdt",
+	},
+};
+
+const char *project_type_to_str(int type)
+{
+	const char *version_type;
+
+	switch (type) {
+	case 'V':
+		version_type = "Release";
+		break;
+	case 'X':
+		version_type = "Engineering Sample";
+		break;
+	case 'A' ... 'U':
+		version_type = "Custom";
+		break;
+	default:
+		version_type = "Unknown";
+		break;
+	}
+
+	return version_type;
+}
+
+static ssize_t imanager_name_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct imanager_platform_data *pdata = dev_get_platdata(dev);
+	const struct ec_info *info = &pdata->dev->info;
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n", info->pcb_name);
+}
+
+static ssize_t imanager_kversion_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct imanager_platform_data *pdata = dev_get_platdata(dev);
+	const struct ec_info *info = &pdata->dev->info;
+
+	return scnprintf(buf, PAGE_SIZE, "%d.%d\n",
+			 info->version.kernel_major,
+			 info->version.kernel_minor);
+}
+
+static ssize_t imanager_fwversion_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct imanager_platform_data *pdata = dev_get_platdata(dev);
+	const struct ec_info *info = &pdata->dev->info;
+
+	return scnprintf(buf, PAGE_SIZE, "%d.%d\n",
+			 info->version.firmware_major,
+			 info->version.firmware_minor);
+}
+
+static ssize_t imanager_type_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct imanager_platform_data *pdata = dev_get_platdata(dev);
+	const struct ec_info *info = &pdata->dev->info;
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n",
+			project_type_to_str(info->version.type));
+}
+
+static ssize_t imanager_chip_name_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct imanager_platform_data *pdata = dev_get_platdata(dev);
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n", pdata->chip_name);
+}
+
+static DEVICE_ATTR(imanager_name, S_IRUGO, imanager_name_show, NULL);
+static DEVICE_ATTR(imanager_kversion, S_IRUGO, imanager_kversion_show, NULL);
+static DEVICE_ATTR(imanager_fwversion, S_IRUGO, imanager_fwversion_show, NULL);
+static DEVICE_ATTR(imanager_type, S_IRUGO, imanager_type_show, NULL);
+static DEVICE_ATTR(imanager_chip_name, S_IRUGO, imanager_chip_name_show, NULL);
+
+static struct attribute *imanager_core_attributes[] = {
+	&dev_attr_imanager_name.attr,
+	&dev_attr_imanager_kversion.attr,
+	&dev_attr_imanager_fwversion.attr,
+	&dev_attr_imanager_type.attr,
+	&dev_attr_imanager_chip_name.attr,
+	NULL
+};
+
+static const struct attribute_group imanager_core_attr_group = {
+	.attrs = imanager_core_attributes,
+};
+
+static int imanager_platform_create(void)
+{
+	struct device *dev;
+	struct imanager_platform_data platdata;
+	int err;
+
+	pdev = platform_device_alloc("imanager-core", -1);
+	if (!pdev)
+		return -ENOMEM;
+
+	dev = &pdev->dev;
+
+	err = platform_device_add_data(pdev, &platdata, sizeof(platdata));
+	if (err)
+		goto exit_device_put;
+
+	err = platform_device_add_resources(pdev, &imanager_ioresource, 1);
+	if (err)
+		goto exit_device_put;
+
+	err = platform_device_add(pdev);
+	if (err)
+		goto exit_device_put;
+
+	err = mfd_add_devices(dev, pdev->id, imanager_devs,
+		ARRAY_SIZE(imanager_devs), NULL, -1, NULL);
+	if (err)
+		goto exit_device_unregister;
+
+	return 0;
+
+exit_device_unregister:
+	platform_device_unregister(pdev);
+exit_device_put:
+	platform_device_put(pdev);
+
+	return err;
+}
+
+static int imanager_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct imanager_platform_data *pdata = dev_get_platdata(dev);
+	struct imanager_device_data *imanager;
+	int ret;
+
+	if (!pdev)
+		return -EINVAL;
+
+	imanager = devm_kzalloc(dev, sizeof(*imanager), GFP_KERNEL);
+	if (!imanager)
+		return -ENOMEM;
+
+	imanager->dev = dev;
+	mutex_init(&imanager->lock);
+
+	platform_set_drvdata(pdev, imanager);
+
+	pdata->dev = imanager_get_ec_device();
+	pdata->chip_name = chip_names[pdata->dev->id];
+
+	dev_info(dev, "Found Advantech iManager %s - %s %d.%d/%d.%d (%s)\n",
+		 pdata->chip_name,
+		 pdata->dev->info.pcb_name,
+		 pdata->dev->info.version.kernel_major,
+		 pdata->dev->info.version.kernel_minor,
+		 pdata->dev->info.version.firmware_major,
+		 pdata->dev->info.version.firmware_minor,
+		 project_type_to_str(pdata->dev->info.version.type));
+
+	ret = sysfs_create_group(&dev->kobj, &imanager_core_attr_group);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int imanager_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+
+	sysfs_remove_group(&dev->kobj, &imanager_core_attr_group);
+
+	mfd_remove_devices(dev);
+
+	return 0;
+}
+
+static struct platform_driver imanager_driver = {
+	.driver = {
+		.owner = THIS_MODULE,
+		.name  = "imanager-core",
+	},
+	.probe	= imanager_probe,
+	.remove	= imanager_remove,
+};
+
+static int __init imanager_init(void)
+{
+	int ret;
+
+	ret = imanager_ec_probe();
+	if (ret < 0)
+		return ret;
+
+	ret = imanager_platform_create();
+	if (ret)
+		return ret;
+
+	ret = platform_driver_register(&imanager_driver);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void __exit imanager_exit(void)
+{
+	if (pdev)
+		platform_device_unregister(pdev);
+
+	platform_driver_unregister(&imanager_driver);
+}
+
+module_init(imanager_init);
+module_exit(imanager_exit);
+
+MODULE_DESCRIPTION("Advantech iManager Core Driver");
+MODULE_AUTHOR("Richard Vidal-Dorsch <richard.dorsch at advantech.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imanager-core");
diff --git a/drivers/mfd/imanager-ec.c b/drivers/mfd/imanager-ec.c
new file mode 100644
index 0000000..be554ba
--- /dev/null
+++ b/drivers/mfd/imanager-ec.c
@@ -0,0 +1,1345 @@
+/*
+ * Advantech iManager Core - Firmware Interface
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch-ELdSlb/RfAS1Z/+hSey0Gg@public.gmane.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/bug.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/byteorder/generic.h>
+#include <linux/module.h>
+#include <linux/swab.h>
+#include <linux/mfd/imanager/ec.h>
+
+/**
+ * This is the delay time between two EC transactions.
+ * Values lower than 200us are not encouraged and may
+ * cause I/O errors
+ */
+#define EC_MICRO_DELAY			200
+#define EC_MAX_RETRY			1000
+
+#define EC_MSG_OFFSET_CMD		0UL
+#define EC_MSG_OFFSET_STATUS		1UL
+#define EC_MSG_OFFSET_PARAM		2UL
+#define EC_MSG_OFFSET_DATA(N)		(3UL + N)
+#define EC_MSG_OFFSET_PAYLOAD(N)	(7UL + N)
+
+/* The Device ID registers - 16 bit */
+#define DEVID_REG_MSB			0x20
+#define DEVID_REG_LSB			0x21
+
+/*
+ * IT8528 based firmware require a read/write command offset.
+ */
+#define EC_CMD_OFFSET_READ		0xA0UL
+#define EC_CMD_OFFSET_WRITE		0x50UL
+
+#define EC_STATUS_SUCCESS		BIT(0)
+#define EC_STATUS_CMD_COMPLETE		BIT(7)
+
+#define PCB_NAME_MAX_SIZE		8UL
+#define EC_I2C_BLOCK_SIZE		32
+#define EC_MAX_DID			32UL
+
+#define DID_LABEL_SIZE			24UL
+#define DID_DESC_SIZE			32UL
+
+#define EC_KERNEL_MINOR(x)		(LOBYTE16(x))
+#define EC_KERNEL_MAJOR(x) ({		\
+	typeof(x) __x = (HIBYTE16(x));	\
+	((__x >> 4) * 10 + (__x & 0x000f)); })
+#define EC_FIRMWARE_MINOR(x)		(LOBYTE16(x))
+#define EC_FIRMWARE_MAJOR(x)		EC_KERNEL_MAJOR(x)
+#define EC_PROJECT_CODE(x)		((char)(LOBYTE16(x)))
+
+enum ec_device_type {
+	ADC = 1,
+	DAC,
+	GPIO,
+	IRQ,
+	PWM,
+	SMB,
+	TACH
+};
+
+enum ec_device_id {
+	/* GPIO */
+	ALTGPIO0	= 0x10,
+	ALTGPIO1,
+	ALTGPIO2,
+	ALTGPIO3,
+	ALTGPIO4,
+	ALTGPIO5,
+	ALTGPIO6,
+	ALTGPIO7,
+	/* Button (GPIO) */
+	BUTTON0,
+	BUTTON1,
+	BUTTON2,
+	BUTTON3,
+	BUTTON4,
+	BUTTON5,
+	BUTTON6,
+	BUTTON7,
+	/* FAN */
+	CPUFAN_2P,
+	CPUFAN_4P,
+	SYSFAN1_2P,
+	SYSFAN1_4P,
+	SYSFAN2_2P,
+	SYSFAN2_4P,
+	/* Brightness Control */
+	BRIGHTNESS,
+	/* System Speaker */
+	PCBEEP,
+	/* SMBus */
+	SMBOEM0,
+	SMBOEM1,
+	SMBOEM2,
+	SMBEEPROM,
+	SMBTHERMAL0,
+	SMBTHERMAL1,
+	SMBSECEEP,
+	I2COEM,
+	/* Speaker */
+	SPEAKER		= 0x30,
+	/* SMBus */
+	SMBEEP2K	= 0x38,
+	OEMEEP,
+	OEMEEP2K,
+	PECI,
+	SMBOEM3,
+	SMLINK,
+	SMBSLV,
+	/* LED */
+	POWERLED	= 0x40,
+	BATLEDG,
+	OEMLED0,
+	OEMLED1,
+	OEMLED2,
+	BATLEDR,
+	/* Smart Battery */
+	SMARTBAT1	= 0x48,
+	SMARTBAT2,
+	/* ADC */
+	CMOSBAT		= 0x50,
+	CMOSBATx2,
+	CMOSBATx10,
+	LIBAT,
+	LIBATx2,
+	LIBATx10,
+	ADC5VS0,
+	ADC5VS0x2,
+	ADC5VS0x10,
+	ADC5VS5,
+	ADC5VS5x2,
+	ADC5VS5x10,
+	ADC33VS0,
+	ADC33VS0x2,
+	ADC33VS0x10,
+	ADC33VS5,
+	ADC33VS5x2,	/* 0x60 */
+	ADC33VS5x10,
+	ADC12VS0,
+	ADC12VS0x2,
+	ADC12VS0x10,
+	VCOREA,
+	VCOREAx2,
+	VCOREAx10,
+	VCOREB,
+	VCOREBx2,
+	VCOREBx10,
+	ADCDC,
+	ADCDCx2,
+	ADCDCx10,
+	VSTBY,
+	VSTBYx2,
+	VSTBYx10,	/* 0x70 */
+	VAUX,
+	VAUXx2,
+	VAUXx10,
+	CURRENT,
+	/* Watchdog */
+	WDIRQ		= 0x78,
+	WDNMI,
+	/* FAN Tacho */
+	TACHO0		= 0x80,
+	TACHO1,
+	TACHO2,
+	/* Brightness/Backlight Control */
+	BRIGHTNESS2	= 0x88,
+	BACKLIGHT1,
+	BACKLIGHT2
+};
+
+enum ec_dynamic_table_type {
+	EC_DYN_DID,
+	EC_DYN_HWP,
+	EC_DYN_POL
+};
+
+struct ec_devtbl {
+	int id;
+	int type;
+	int scale;
+	const char label[DID_LABEL_SIZE];
+	const char description[DID_DESC_SIZE];
+};
+
+struct ec_dyn_devtbl {
+	int did;	/* Device ID */
+	int hwp;	/* Hardware Pin */
+	int pol;	/* Polarity */
+	const struct ec_devtbl *devtbl; /* Device table Entry */
+};
+
+struct imanager_data {
+	int (*read)(int cmd);
+	int (*write)(int cmd, int value);
+
+	struct ec_dyn_devtbl dyn[EC_MAX_DID];
+
+	struct imanager_ec_device		dev;
+	struct imanager_hwmon_device		sensors;
+	struct imanager_gpio_device		gpio;
+	struct imanager_i2c_device		i2c;
+	struct imanager_watchdog_device		wdt;
+	struct imanager_backlight_device	blc;
+};
+
+struct ec_version_raw {
+	u16	kernel,
+		chipid,
+		project_code,
+		firmware;
+};
+
+enum ec_ram_type {
+	EC_RAM_ACPI = 1,
+	EC_RAM_HW,
+	EC_RAM_EXT
+};
+
+static struct imanager_data ec;
+
+static const struct ec_devtbl devtbl[] = {
+	{ ALTGPIO0,	GPIO,	-1,	"gpio0" },
+	{ ALTGPIO1,	GPIO,	-1,	"gpio1" },
+	{ ALTGPIO2,	GPIO,	-1,	"gpio2" },
+	{ ALTGPIO3,	GPIO,	-1,	"gpio3" },
+	{ ALTGPIO4,	GPIO,	-1,	"gpio4" },
+	{ ALTGPIO5,	GPIO,	-1,	"gpio5" },
+	{ ALTGPIO6,	GPIO,	-1,	"gpio6" },
+	{ ALTGPIO7,	GPIO,	-1,	"gpio7" },
+	{ BUTTON0,	GPIO,	-1,	"button0" },
+	{ BUTTON1,	GPIO,	-1,	"button1" },
+	{ BUTTON2,	GPIO,	-1,	"button2" },
+	{ BUTTON3,	GPIO,	-1,	"button3" },
+	{ BUTTON4,	GPIO,	-1,	"button4" },
+	{ BUTTON5,	GPIO,	-1,	"button4" },
+	{ BUTTON6,	GPIO,	-1,	"button4" },
+	{ BUTTON7,	GPIO,	-1,	"button4" },
+	{ CPUFAN_2P,	PWM,	2,	"FAN CPU" },
+	{ CPUFAN_4P,	PWM,	4,	"FAN CPU" },
+	{ SYSFAN1_2P,	PWM,	2,	"FAN SYS1" },
+	{ SYSFAN1_4P,	PWM,	4,	"FAN SYS1" },
+	{ SYSFAN2_2P,	PWM,	2,	"FAN SYS2" },
+	{ SYSFAN2_4P,	PWM,	4,	"FAN SYS2" },
+	{ BRIGHTNESS,	PWM,	-1,	"Brightness1" },
+	{ PCBEEP,	PWM,	-1,	"Beep" },
+	{ SMBOEM0,	SMB,	-1,	"SMB1" },
+	{ SMBOEM1,	SMB,	-1,	"SMB2" },
+	{ SMBOEM2,	SMB,	-1,	"SMB3" },
+	{ SMBEEPROM,	SMB,	-1,	"SMBEEP" },
+	{ SMBTHERMAL0,	SMB,	-1,	"SMBTHERM0" },
+	{ SMBTHERMAL1,	SMB,	-1,	"SMBTHERM1" },
+	{ SMBSECEEP,	SMB,	-1,	"SMBSECEEP" },
+	{ I2COEM,	SMB,	-1,	"I2COEM" },
+	{ SPEAKER,	DAC,	-1,	"Speaker" },
+	{ SMBEEP2K,	SMB,	-1,	"SMBEEP2K" },
+	{ OEMEEP,	SMB,	-1,	"OEMEEP" },
+	{ OEMEEP2K,	SMB,	-1,	"OEMEEP2K" },
+	{ PECI,		SMB,	-1,	"SMB_PECI" },
+	{ SMBOEM3,	SMB,	-1,	"SMBOEM3" },
+	{ SMLINK,	SMB,	-1,	"SMLINK" },
+	{ SMBSLV,	SMB,	-1,	"SMBSLV" },
+	{ POWERLED,	GPIO,	-1,	"Power LED" },
+	{ BATLEDG,	GPIO,	-1,	"BATLEDG" },
+	{ OEMLED0,	GPIO,	-1,	"OEMLED0" },
+	{ OEMLED1,	GPIO,	-1,	"OEMLED1" },
+	{ OEMLED2,	GPIO,	-1,	"OEMLED2" },
+	{ BATLEDR,	GPIO,	-1,	"OEMLEDR" },
+	{ SMARTBAT1,	SMB,	-1,	"SmartBat1" },
+	{ SMARTBAT2,	SMB,	-1,	"SmartBat2" },
+	{ CMOSBAT,	ADC,	1,	"VBat" },
+	{ CMOSBATx2,	ADC,	2,	"VBat" },
+	{ CMOSBATx10,	ADC,	10,	"VBat" },
+	{ LIBAT,	ADC,	1,	"VBat2" },
+	{ LIBATx2,	ADC,	2,	"VBat2" },
+	{ LIBATx10,	ADC,	10,	"VBat2" },
+	{ ADC5VS0,	ADC,	1,	"+5V" },
+	{ ADC5VS0x2,	ADC,	2,	"+5V" },
+	{ ADC5VS0x10,	ADC,	10,	"+5V" },
+	{ ADC5VS5,	ADC,	1,	"+5V" },
+	{ ADC5VS5x2,	ADC,	2,	"+5V" },
+	{ ADC5VS5x10,	ADC,	10,	"+5V" },
+	{ ADC33VS0,	ADC,	1,	"+3.3V" },
+	{ ADC33VS0x2,	ADC,	2,	"+3.3V" },
+	{ ADC33VS0x10,	ADC,	10,	"+3.3V" },
+	{ ADC33VS5,	ADC,	1,	"+3.3V" },
+	{ ADC33VS5x2,	ADC,	2,	"+3.3V" },
+	{ ADC33VS5x10,	ADC,	10,	"+3.3V" },
+	{ ADC12VS0,	ADC,	1,	"+12V" },
+	{ ADC12VS0x2,	ADC,	2,	"+12V" },
+	{ ADC12VS0x10,	ADC,	10,	"+12V" },
+	{ VCOREA,	ADC,	1,	"VCore" },
+	{ VCOREAx2,	ADC,	2,	"VCore" },
+	{ VCOREAx10,	ADC,	10,	"VCore" },
+	{ VCOREB,	ADC,	1,	"VCore2" },
+	{ VCOREBx2,	ADC,	2,	"VCore2" },
+	{ VCOREBx10,	ADC,	10,	"VCore2" },
+	{ ADCDC,	ADC,	1,	"ADCDC" },
+	{ ADCDCx2,	ADC,	2,	"ADCDCx2" },
+	{ ADCDCx10,	ADC,	10,	"ADCDCx10" },
+	{ VSTBY,	ADC,	1,	"Vsb" },
+	{ VSTBYx2,	ADC,	2,	"Vsb" },
+	{ VSTBYx10,	ADC,	10,	"Vsb" },
+	{ VAUX,		ADC,	1,	"VAUX" },
+	{ VAUXx2,	ADC,	2,	"VAUX" },
+	{ VAUXx10,	ADC,	10,	"VAUX" },
+	{ CURRENT,	ADC,	1,	"Imon" },
+	{ WDIRQ,	IRQ,	-1,	"WDIRQ" },
+	{ WDNMI,	GPIO,	-1,	"WDNMI" },
+	{ TACHO0,	TACH,	-1,	"Tacho1" },
+	{ TACHO1,	TACH,	-1,	"Tacho2" },
+	{ TACHO2,	TACH,	-1,	"Tacho3" },
+	{ BRIGHTNESS2,	PWM,	-1,	"Brightness2" },
+	{ BACKLIGHT1,	GPIO,	-1,	"Backlight1" },
+	{ BACKLIGHT2,	GPIO,	-1,	"Backlight2" },
+	{ 0, 0, 0, "" }
+};
+
+/**
+ * EC I/O
+ */
+
+static inline void imanager_delay(void)
+{
+	udelay(EC_MICRO_DELAY);
+}
+
+static int wait_ibf_cleared(void)
+{
+	int i = 0;
+
+	do {
+		if (!(inb(IT8516_CMD_PORT) & BIT(1)))
+			return 0;
+		imanager_delay();
+	} while (i++ < EC_MAX_RETRY);
+
+	return -ETIME;
+}
+
+static int wait_obf_set(void)
+{
+	int i = 0;
+
+	do {
+		if (inb(IT8516_CMD_PORT) & BIT(0))
+			return 0;
+		imanager_delay();
+	} while (i++ < EC_MAX_RETRY);
+
+	return -ETIME;
+}
+
+static inline int ec_inb(int addr, int reg)
+{
+	outb(reg, addr);
+	return inb(addr + 1);
+}
+
+static inline void ec_outb(int addr, int reg, int val)
+{
+	outb(reg, addr);
+	outb(val, addr + 1);
+}
+
+static inline int ec_io28_inb(int addr, int reg)
+{
+	int ret;
+
+	ret = wait_ibf_cleared();
+	if (ret)
+		return ret;
+
+	/* clear data to prevent lock */
+	inb(addr - 1);
+
+	outb(reg, addr);
+
+	ret = wait_obf_set();
+	if (ret)
+		return ret;
+
+	return inb(addr - 1);
+}
+
+static inline int ec_io28_outb(int addr, int reg, int val)
+{
+	int ret;
+
+	ret = wait_ibf_cleared();
+	if (ret)
+		return ret;
+
+	outb(reg, addr);
+
+	ret = wait_ibf_cleared();
+	if (ret)
+		return ret;
+
+	outb(val, addr - 1);
+
+	return 0;
+}
+
+static int ec_io18_read(int cmd)
+{
+	return ec_inb(IT8518_CMD_PORT, cmd);
+}
+
+static int ec_io18_write(int cmd, int value)
+{
+	ec_outb(IT8518_CMD_PORT, cmd, value);
+
+	return 0;
+}
+
+static int ec_io28_read(int cmd)
+{
+	return ec_io28_inb(IT8516_CMD_PORT, cmd + EC_CMD_OFFSET_READ);
+}
+
+static int ec_io28_write(int cmd, int value)
+{
+	return ec_io28_outb(IT8516_CMD_PORT, cmd + EC_CMD_OFFSET_WRITE, value);
+}
+
+/* Prevent FW lock */
+static void ec_clear_ports(void)
+{
+	inb(IT8516_DAT_PORT);
+	inb(IT8518_DAT_PORT);
+}
+
+static inline u16 ec_read_chipid(u16 addr)
+{
+	return (ec_inb(addr, DEVID_REG_MSB) << 8 |
+		ec_inb(addr, DEVID_REG_LSB));
+}
+
+static int ec_wait_cmd_clear(void)
+{
+	int i = 0;
+
+	do {
+		if (!ec.read(0))
+			return 0;
+		imanager_delay();
+	} while (i++ < EC_MAX_RETRY);
+
+	pr_err("No respons from EC (timeout)\n");
+
+	return -ETIME;
+}
+
+static int ec_read_ram(u8 bank, u8 offset, u8 len, u8 *buf, u8 bufsz)
+{
+	int i;
+	int ret;
+
+	if (WARN_ON(!buf))
+		return -EINVAL;
+
+	ret = ec_wait_cmd_clear();
+	if (ret)
+		return ret;
+
+	ec.write(EC_MSG_OFFSET_PARAM, bank);
+	ec.write(EC_MSG_OFFSET_DATA(0), offset);
+	ec.write(EC_MSG_OFFSET_DATA(0x2C), len);
+	ec.write(EC_MSG_OFFSET_CMD, EC_CMD_RAM_RD);
+
+	ret = ec_wait_cmd_clear();
+	if (ret)
+		return ret;
+
+	ret = ec.read(EC_MSG_OFFSET_STATUS);
+	if (ret != EC_STATUS_SUCCESS)
+		return -EIO;
+
+	for (i = 0; (i < len) && (len < EC_MSG_SIZE) && (len <= bufsz); i++)
+		buf[i] = ec.read(EC_MSG_OFFSET_DATA(i + 1));
+
+	return 0;
+}
+
+static int ec_write_ram(u8 bank, u8 offset, u8 len, u8 *buf)
+{
+	int i;
+	int ret;
+
+	if (WARN_ON(!buf))
+		return -EINVAL;
+
+	ret = ec_wait_cmd_clear();
+	if (ret)
+		return ret;
+
+	ec.write(EC_MSG_OFFSET_PARAM, bank);
+	ec.write(EC_MSG_OFFSET_DATA(0), offset);
+	ec.write(EC_MSG_OFFSET_DATA(0x2C), len);
+
+	for (i = 0; (i < len) && (len < EC_MSG_SIZE); i++)
+		ec.write(EC_MSG_OFFSET_DATA(i + 1), buf[i]);
+
+	ec.write(EC_MSG_OFFSET_CMD, EC_CMD_RAM_WR);
+
+	ret = ec_wait_cmd_clear();
+	if (ret)
+		return ret;
+
+	ret = ec.read(EC_MSG_OFFSET_STATUS);
+	if (ret != EC_STATUS_SUCCESS)
+		return -EIO;
+
+	return 0;
+}
+
+static int ec_read_dynamic_devtbl(struct imanager_data *ec)
+{
+	u32 i, j;
+	int ret;
+	struct ec_message did = {
+		.rlen = EC_MAX_DID,
+		.wlen = 0,
+	};
+	struct ec_message hwp = {
+		.rlen = EC_MAX_DID,
+		.wlen = 0,
+	};
+	struct ec_message pol = {
+		.rlen = EC_MAX_DID,
+		.wlen = 0,
+	};
+	struct ec_dyn_devtbl *dyn;
+
+	memset(ec->dyn, 0, sizeof(ec->dyn));
+
+	ret = imanager_msg_read(EC_CMD_DYN_TBL_RD, EC_DYN_DID, &did);
+	if (ret)
+		return -EIO;
+
+	ret = imanager_msg_read(EC_CMD_DYN_TBL_RD, EC_DYN_HWP, &hwp);
+	if (ret)
+		return -EIO;
+
+	ret = imanager_msg_read(EC_CMD_DYN_TBL_RD, EC_DYN_POL, &pol);
+	if (ret)
+		return -EIO;
+
+	for (i = 0; (i < EC_MAX_DID) && did.u.data[i]; i++) {
+		dyn = &ec->dyn[i];
+		for (j = 0; j < ARRAY_SIZE(devtbl); j++) {
+			if (devtbl[j].id == did.u.data[i]) {
+				dyn->did = did.u.data[i];
+				dyn->hwp = hwp.u.data[i];
+				dyn->pol = pol.u.data[i];
+				dyn->devtbl = &devtbl[j];
+				break;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int ec_read_buffer(u8 *data, int rlen)
+{
+	int ret, i, j;
+	int pages = rlen % EC_I2C_BLOCK_SIZE;
+	int rem = rlen / EC_I2C_BLOCK_SIZE;
+
+	/* pre-condition: rlen <= 256 */
+
+	ret = ec_wait_cmd_clear();
+	if (ret)
+		return ret;
+
+	for (i = 0; i < pages; i++) {
+		ec.write(EC_MSG_OFFSET_PARAM, i);
+		ec.write(EC_MSG_OFFSET_CMD, EC_CMD_BUF_RD);
+
+		ret = ec_wait_cmd_clear();
+		if (ret)
+			return ret;
+
+		ret = ec.read(EC_MSG_OFFSET_STATUS);
+		if (ret != EC_STATUS_SUCCESS)
+			return -EIO;
+
+		for (j = 0; j < EC_I2C_BLOCK_SIZE; j++)
+			data[i * EC_I2C_BLOCK_SIZE + j] =
+				ec.read(EC_MSG_OFFSET_DATA(j));
+	}
+
+	if (rem) {
+		ec.write(EC_MSG_OFFSET_PARAM, pages);
+		ec.write(EC_MSG_OFFSET_CMD, EC_CMD_BUF_RD);
+
+		ret = ec_wait_cmd_clear();
+		if (ret)
+			return ret;
+
+		ret = ec.read(EC_MSG_OFFSET_STATUS);
+		if (ret != EC_STATUS_SUCCESS)
+			return -EIO;
+
+		for (j = 0; j < rem; j++)
+			data[pages * EC_I2C_BLOCK_SIZE + j] =
+				ec.read(EC_MSG_OFFSET_DATA(j));
+	}
+
+	return 0;
+}
+
+static int
+imanager_msg_trans(u8 cmd, u8 param, struct ec_message *msg, bool payload)
+{
+	int ret, i, len;
+	u32 offset;
+
+	ret = ec_wait_cmd_clear();
+	if (ret)
+		return ret;
+
+	ec.write(EC_MSG_OFFSET_PARAM, param);
+
+	if (msg && msg->wlen) {
+		if (!msg->data) {
+			for (i = 0; i < msg->wlen; i++)
+				ec.write(EC_MSG_OFFSET_DATA(i),
+					msg->u.data[i]);
+		} else {
+			for (i = 0; i < msg->wlen; i++)
+				ec.write(EC_MSG_OFFSET_DATA(i), msg->data[i]);
+			ec.write(EC_MSG_OFFSET_DATA(0x2c), msg->wlen);
+		}
+	}
+
+	ec.write(EC_MSG_OFFSET_CMD, cmd);
+	ret = ec_wait_cmd_clear();
+	if (ret)
+		return ret;
+
+	/* GPIO and I2C have different success return values */
+	ret = ec.read(EC_MSG_OFFSET_STATUS);
+	if ((ret != EC_STATUS_SUCCESS) && !(ret & EC_STATUS_CMD_COMPLETE))
+		return -EIO;
+	/*
+	 * EC I2C may return an error code which we need to hand-off
+	 * to the caller
+	 */
+	else if (ret & 0x07e)
+		return ret;
+
+	if (msg && msg->data) {
+		ret = ec_read_buffer(msg->data, msg->rlen);
+		if (ret < 0)
+			return ret;
+	} else if (msg && msg->rlen) {
+		if (msg->rlen == 0xff)
+			/* Use alternate message body for hwmon */
+			len = ec.read(EC_MSG_OFFSET_DATA(0x2C));
+		else
+			len = (msg->rlen > EC_MSG_SIZE ? EC_MSG_SIZE :
+				msg->rlen);
+		offset = payload ? EC_MSG_OFFSET_PAYLOAD(0) :
+				EC_MSG_OFFSET_DATA(0);
+		for (i = 0; i < len; i++)
+			msg->u.data[i] = ec.read(offset + i);
+	}
+
+	return 0;
+}
+
+int imanager_msg_read(u8 cmd, u8 param, struct ec_message *msg)
+{
+	return imanager_msg_trans(cmd, param, msg, false);
+}
+EXPORT_SYMBOL_GPL(imanager_msg_read);
+
+int imanager_msg_write(u8 cmd, u8 param, struct ec_message *msg)
+{
+	return imanager_msg_trans(cmd, param, msg, true);
+}
+EXPORT_SYMBOL_GPL(imanager_msg_write);
+
+int imanager_read_byte(u8 cmd, u8 param)
+{
+	int ret;
+	struct ec_message msg = {
+		.rlen = 1,
+		.wlen = 0,
+	};
+
+	ret = imanager_msg_read(cmd, param, &msg);
+	if (ret)
+		return ret;
+
+	return msg.u.data[0];
+}
+EXPORT_SYMBOL_GPL(imanager_read_byte);
+
+int imanager_read_word(u8 cmd, u8 param)
+{
+	int ret;
+	struct ec_message msg = {
+		.rlen = 2,
+		.wlen = 0,
+	};
+
+	ret = imanager_msg_read(cmd, param, &msg);
+	if (ret)
+		return ret;
+
+	return (msg.u.data[0] << 8 | msg.u.data[1]);
+}
+EXPORT_SYMBOL_GPL(imanager_read_word);
+
+int imanager_write_byte(u8 cmd, u8 param, u8 byte)
+{
+	struct ec_message msg = {
+		.rlen = 0,
+		.wlen = 1,
+		.u = {
+			.data = { byte, 0 },
+		},
+	};
+
+	return imanager_msg_write(cmd, param, &msg);
+}
+EXPORT_SYMBOL_GPL(imanager_write_byte);
+
+int imanager_write_word(u8 cmd, u8 param, u16 word)
+{
+	struct ec_message msg = {
+		.rlen = 0,
+		.wlen = 2,
+		.u = {
+			.data = { HIBYTE16(word), LOBYTE16(word), 0 },
+		},
+	};
+
+	return imanager_msg_write(cmd, param, &msg);
+}
+EXPORT_SYMBOL_GPL(imanager_write_word);
+
+static int ec_hwram_read_byte(u8 offset)
+{
+	int ret;
+	u8 val;
+
+	ret = ec_read_ram(EC_RAM_HW, offset, sizeof(val), &val, sizeof(val));
+	if (ret < 0) {
+		pr_err("Failed to read from HWRAM @ 0x%02X\n", offset);
+		return ret;
+	}
+
+	return val;
+}
+
+int imanager_acpiram_read_byte(u8 offset)
+{
+	int ret;
+	u8 value;
+
+	ret = ec_read_ram(EC_RAM_ACPI, offset, sizeof(value), (u8 *)&value,
+			  sizeof(value));
+	if (ret < 0) {
+		pr_err("Failed to read from ACPI RAM @ 0x%02X\n", offset);
+		return ret;
+	}
+
+	return value;
+}
+EXPORT_SYMBOL_GPL(imanager_acpiram_read_byte);
+
+int imanager_acpiram_write_byte(u8 offset, u8 value)
+{
+	int ret;
+
+	ret = ec_write_ram(EC_RAM_ACPI, offset, sizeof(value), &value);
+	if (ret) {
+		pr_err("Failed to write to ACPI RAM @ 0x%02X\n", offset);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(imanager_acpiram_write_byte);
+
+int imanager_acpiram_read_block(u8 offset, u8 *buf, u8 len)
+{
+	int ret;
+
+	ret = ec_read_ram(EC_RAM_ACPI, offset, len, buf, len);
+	if (ret < 0) {
+		pr_err("Failed to read from ACPI RAM @ 0x%02X\n", offset);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(imanager_acpiram_read_block);
+
+int imanager_acpiram_write_block(u8 offset, u8 *buf, u8 len)
+{
+	int ret;
+
+	ret = ec_write_ram(EC_RAM_ACPI, offset, len, buf);
+	if (ret) {
+		pr_err("Failed to write to ACPI RAM @ 0x%02X\n", offset);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(imanager_acpiram_write_block);
+
+int imanager_wait_proc_complete(u8 offset, int cond)
+{
+	int ret, i;
+
+	for (i = 0; i < EC_MAX_RETRY; i++) {
+		ret = ec_hwram_read_byte(offset);
+		if (ret < 0)
+			return ret;
+
+		if (ret == cond)
+			return 0;
+
+		imanager_delay();
+	}
+
+	return -EIO;
+}
+EXPORT_SYMBOL_GPL(imanager_wait_proc_complete);
+
+static inline void ec_get_dev_attr(struct ec_dev_attr *attr,
+				   const struct ec_dyn_devtbl *tbl)
+{
+	attr->did = tbl->did;
+	attr->hwp = tbl->hwp;
+	attr->pol = tbl->pol;
+	attr->scale = tbl->devtbl->scale;
+	attr->label = tbl->devtbl->label;
+}
+
+static int ec_get_dev_gpio(struct imanager_data *ec)
+{
+	size_t i;
+	struct ec_dyn_devtbl *dyn;
+	struct imanager_gpio_device *gpio = &ec->gpio;
+
+	for (i = 0; i < ARRAY_SIZE(ec->dyn); i++) {
+		dyn = &ec->dyn[i];
+		if (dyn->did && (dyn->devtbl->type == GPIO)) {
+			switch (dyn->did) {
+			case ALTGPIO0:
+				ec_get_dev_attr(&gpio->attr[0], dyn);
+				gpio->num++;
+				break;
+			case ALTGPIO1:
+				ec_get_dev_attr(&gpio->attr[1], dyn);
+				gpio->num++;
+				break;
+			case ALTGPIO2:
+				ec_get_dev_attr(&gpio->attr[2], dyn);
+				gpio->num++;
+				break;
+			case ALTGPIO3:
+				ec_get_dev_attr(&gpio->attr[3], dyn);
+				gpio->num++;
+				break;
+			case ALTGPIO4:
+				ec_get_dev_attr(&gpio->attr[4], dyn);
+				gpio->num++;
+				break;
+			case ALTGPIO5:
+				ec_get_dev_attr(&gpio->attr[5], dyn);
+				gpio->num++;
+				break;
+			case ALTGPIO6:
+				ec_get_dev_attr(&gpio->attr[6], dyn);
+				gpio->num++;
+				break;
+			case ALTGPIO7:
+				ec_get_dev_attr(&gpio->attr[7], dyn);
+				gpio->num++;
+				break;
+			case BUTTON0:
+			case BUTTON1:
+			case BUTTON2:
+			case BUTTON3:
+			case BUTTON4:
+			case BUTTON5:
+			case BUTTON6:
+			case BUTTON7:
+			case POWERLED:
+			case BATLEDG:
+			case OEMLED0:
+			case OEMLED1:
+			case OEMLED2:
+			case BATLEDR:
+			case WDNMI:
+			case BACKLIGHT1:
+			case BACKLIGHT2:
+				break;
+			default:
+				pr_err("DID 0x%02X not handled\n", dyn->did);
+				return -EINVAL;
+			}
+		}
+	}
+
+	gpio->info = &ec->dev.info;
+
+	return 0;
+}
+
+static int ec_get_dev_adc(struct imanager_data *ec)
+{
+	size_t i;
+	struct ec_dyn_devtbl *dyn;
+	struct dev_adc *adc = &ec->sensors.adc;
+
+	for (i = 0; i < ARRAY_SIZE(ec->dyn); i++) {
+		dyn = &ec->dyn[i];
+		if (dyn->did && (dyn->devtbl->type == ADC)) {
+			switch (dyn->did) {
+			case ADC12VS0:
+			case ADC12VS0x2:
+			case ADC12VS0x10:
+				ec_get_dev_attr(&adc->attr[0], dyn);
+				adc->num++;
+				break;
+			case ADC5VS5:
+			case ADC5VS5x2:
+			case ADC5VS5x10:
+				ec_get_dev_attr(&adc->attr[1], dyn);
+				adc->num++;
+				break;
+			case CMOSBAT:
+			case CMOSBATx2:
+			case CMOSBATx10:
+				ec_get_dev_attr(&adc->attr[2], dyn);
+				adc->num++;
+				break;
+			case VCOREA:
+			case ADC5VS0:
+			case ADC5VS0x2:
+			case ADC5VS0x10:
+				ec_get_dev_attr(&adc->attr[3], dyn);
+				adc->num++;
+				break;
+			case CURRENT:
+			case ADC33VS0:
+			case ADC33VS0x2:
+			case ADC33VS0x10:
+				ec_get_dev_attr(&adc->attr[4], dyn);
+				adc->num++;
+				break;
+			default:
+				pr_err("DID 0x%02X not handled\n", dyn->did);
+				return -EINVAL;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int ec_get_dev_fan(struct imanager_data *ec)
+{
+	size_t i;
+	struct ec_dyn_devtbl *dyn;
+	struct dev_fan *fan = &ec->sensors.fan;
+
+	for (i = 0; i < ARRAY_SIZE(ec->dyn); i++) {
+		dyn = &ec->dyn[i];
+		if (dyn->did && ((dyn->devtbl->type == TACH) ||
+				 (dyn->devtbl->type == PWM))) {
+			switch (dyn->did) {
+			case CPUFAN_2P:
+			case CPUFAN_4P:
+				ec_get_dev_attr(&fan->attr[0], dyn);
+				fan->num++;
+				fan->active |= 1 << 0;
+				break;
+			case SYSFAN1_2P:
+			case SYSFAN1_4P:
+				ec_get_dev_attr(&fan->attr[1], dyn);
+				fan->num++;
+				fan->active |= 1 << 1;
+				break;
+			case SYSFAN2_2P:
+			case SYSFAN2_4P:
+				ec_get_dev_attr(&fan->attr[2], dyn);
+				fan->num++;
+				fan->active |= 1 << 2;
+				break;
+			case TACHO0:
+			case TACHO1:
+			case TACHO2:
+			case BRIGHTNESS:
+			case BRIGHTNESS2:
+			case PCBEEP:
+				break;
+			default:
+				pr_err("DID 0x%02X not handled\n", dyn->did);
+				return -EINVAL;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int ec_get_dev_hwmon(struct imanager_data *ec)
+{
+	int ret;
+
+	ret = ec_get_dev_adc(ec);
+	if (ret < 0)
+		return ret;
+
+	ret = ec_get_dev_fan(ec);
+	if (ret < 0)
+		return ret;
+
+	ec->sensors.ecdev = &ec->dev;
+
+	return 0;
+}
+
+static int ec_get_dev_i2c(struct imanager_data *ec)
+{
+	size_t i;
+	struct ec_dyn_devtbl *dyn;
+	struct imanager_i2c_device *i2c = &ec->i2c;
+
+	for (i = 0; i < ARRAY_SIZE(ec->dyn); i++) {
+		dyn = &ec->dyn[i];
+		if (dyn->did && (dyn->devtbl->type == SMB)) {
+			switch (dyn->did) {
+			case SMBEEPROM:
+				ec_get_dev_attr(&i2c->attr[0], dyn);
+				i2c->eeprom = &i2c->attr[0];
+				i2c->num++;
+				break;
+			case I2COEM:
+				ec_get_dev_attr(&i2c->attr[1], dyn);
+				i2c->i2coem = &i2c->attr[1];
+				i2c->num++;
+				break;
+			case SMBOEM0:
+			case SMBOEM1:
+			case SMBOEM2:
+			case SMBTHERMAL0:
+			case SMBTHERMAL1:
+			case SMBSECEEP:
+			case SMBEEP2K:
+			case OEMEEP:
+			case OEMEEP2K:
+			case PECI:
+			case SMBOEM3:
+			case SMLINK:
+			case SMBSLV:
+			case SMARTBAT1:
+			case SMARTBAT2:
+				break;
+			default:
+				pr_err("DID 0x%02X not handled\n", dyn->did);
+				return -EINVAL;
+			}
+		}
+	}
+
+	i2c->ecdev = &ec->dev;
+
+	return 0;
+}
+
+static int ec_get_dev_blc(struct imanager_data *ec)
+{
+	size_t i;
+	struct ec_dyn_devtbl *dyn;
+	struct imanager_backlight_device *blc = &ec->blc;
+
+	for (i = 0; i < ARRAY_SIZE(ec->dyn); i++) {
+		dyn = &ec->dyn[i];
+		if (dyn->did && (dyn->devtbl->type == PWM)) {
+			switch (dyn->did) {
+			case BRIGHTNESS:
+				ec_get_dev_attr(&blc->attr[0], dyn);
+				blc->brightness[0] = EC_ACPIRAM_BRIGHTNESS1;
+				blc->num++;
+				break;
+			case BRIGHTNESS2:
+				ec_get_dev_attr(&blc->attr[1], dyn);
+				blc->brightness[1] = EC_ACPIRAM_BRIGHTNESS2;
+				blc->num++;
+				break;
+			case CPUFAN_2P:
+			case CPUFAN_4P:
+			case SYSFAN1_2P:
+			case SYSFAN1_4P:
+			case SYSFAN2_2P:
+			case SYSFAN2_4P:
+			case PCBEEP:
+			case TACHO0:
+			case TACHO1:
+			case TACHO2:
+				break;
+			default:
+				pr_err("DID 0x%02X not handled\n", dyn->did);
+				return -EINVAL;
+			}
+		}
+	}
+
+	blc->info = &ec->dev.info;
+
+	return 0;
+}
+
+static int ec_get_dev_wdt(struct imanager_data *ec)
+{
+	size_t i;
+	struct ec_dyn_devtbl *dyn;
+	struct imanager_watchdog_device *wdt = &ec->wdt;
+
+	for (i = 0; i < ARRAY_SIZE(ec->dyn); i++) {
+		dyn = &ec->dyn[i];
+		if (dyn->did && (dyn->devtbl->type == IRQ)) {
+			switch (dyn->did) {
+			case WDIRQ:
+				ec_get_dev_attr(&wdt->attr[0], dyn);
+				wdt->irq = &wdt->attr[0];
+				wdt->num++;
+				break;
+			case WDNMI:
+				ec_get_dev_attr(&wdt->attr[1], dyn);
+				wdt->nmi = &wdt->attr[1];
+				wdt->num++;
+				break;
+			default:
+				pr_err("DID 0x%02X not handled\n", dyn->did);
+				return -EINVAL;
+			}
+		}
+	}
+
+	wdt->info = &ec->dev.info;
+
+	return 0;
+}
+
+const struct imanager_ec_device *imanager_get_ec_device(void)
+{
+	return &ec.dev;
+};
+EXPORT_SYMBOL_GPL(imanager_get_ec_device);
+
+const struct imanager_hwmon_device *imanager_get_hwmon_device(void)
+{
+	return &ec.sensors;
+}
+EXPORT_SYMBOL_GPL(imanager_get_hwmon_device);
+
+const struct imanager_gpio_device *imanager_get_gpio_device(void)
+{
+	return &ec.gpio;
+}
+EXPORT_SYMBOL_GPL(imanager_get_gpio_device);
+
+const struct imanager_i2c_device *imanager_get_i2c_device(void)
+{
+	return &ec.i2c;
+}
+EXPORT_SYMBOL_GPL(imanager_get_i2c_device);
+
+const struct imanager_backlight_device *imanager_get_backlight_device(void)
+{
+	return &ec.blc;
+}
+EXPORT_SYMBOL_GPL(imanager_get_backlight_device);
+
+const struct imanager_watchdog_device *imanager_get_watchdog_device(void)
+{
+	return &ec.wdt;
+}
+EXPORT_SYMBOL_GPL(imanager_get_watchdog_device);
+
+static int ec_get_version(struct ec_version *version)
+{
+	int ret;
+	u16 raw;
+	struct ec_version_raw ver;
+
+	if (WARN_ON(!version))
+		return -EINVAL;
+
+	ret = ec_read_ram(EC_RAM_ACPI, EC_ACPIRAM_FW_RELEASE_RD, sizeof(ver),
+			 (u8 *)&ver, sizeof(ver));
+	if (ret < 0)
+		return ret;
+
+	raw = swab16(ver.kernel);
+	version->kernel_major = EC_KERNEL_MAJOR(raw);
+	version->kernel_minor = EC_KERNEL_MINOR(raw);
+
+	raw = swab16(ver.firmware);
+	version->firmware_major = EC_FIRMWARE_MAJOR(raw);
+	version->firmware_minor = EC_FIRMWARE_MINOR(raw);
+
+	raw = swab16(ver.project_code);
+	version->type = EC_PROJECT_CODE(raw);
+
+	return 0;
+}
+
+static int ec_get_pcb_name(struct ec_info *info)
+{
+	int ret;
+	struct ec_message msg = {
+		.rlen = ARRAY_SIZE(info->pcb_name),
+		.wlen = 0,
+	};
+
+	if (WARN_ON(!info))
+		return -EINVAL;
+
+	ret = imanager_msg_read(EC_CMD_FW_INFO_RD, 0, &msg);
+	if (ret)
+		return ret;
+
+	/*
+	 * Sadly, the string is not Null-terminated so we will need to read a
+	 * fixed amount of chars. There is, apparently, no exact definition
+	 * of board name (SOM6867 vs. MIO-5271).
+	 */
+	memset(info->pcb_name, 0, ARRAY_SIZE(info->pcb_name));
+	strncpy(info->pcb_name, (const char *)msg.u.data, PCB_NAME_MAX_SIZE);
+
+	if (strchr(info->pcb_name, '-') == NULL)
+		info->pcb_name[PCB_NAME_MAX_SIZE - 1] = '\0';
+
+	return 0;
+}
+
+static int ec_get_fw_info(struct ec_info *info)
+{
+	int ret;
+
+	if (WARN_ON(!info))
+		return -EINVAL;
+
+	ret = ec_get_version(&info->version);
+	if (ret)
+		return ret;
+
+	return ec_get_pcb_name(info);
+}
+
+static int ec_init(void)
+{
+	int ret;
+
+	ec_clear_ports();
+
+	ret = ec_read_dynamic_devtbl(&ec);
+	if (ret)
+		return ret;
+
+	ret = ec_get_fw_info(&ec.dev.info);
+	if (ret < 0)
+		return ret;
+
+	ret = ec_get_dev_gpio(&ec);
+	if (ret < 0)
+		return ret;
+
+	ret = ec_get_dev_hwmon(&ec);
+	if (ret < 0)
+		return ret;
+
+	ret = ec_get_dev_i2c(&ec);
+	if (ret < 0)
+		return ret;
+
+	ret = ec_get_dev_blc(&ec);
+	if (ret < 0)
+		return ret;
+
+	ret = ec_get_dev_wdt(&ec);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+int imanager_ec_probe(void)
+{
+	int chipid = ec_read_chipid(EC_BASE_ADDR);
+
+	memset((void *)&ec, 0, sizeof(ec));
+
+	switch (chipid) {
+	case EC_DEVID_IT8516:
+		pr_err("EC IT8516 not supported\n");
+		ec.dev.id = IT8516;
+		return -ENODEV;
+	case EC_DEVID_IT8518:
+		ec.read = ec_io18_read;
+		ec.write = ec_io18_write;
+		ec.dev.id = IT8518;
+		break;
+	case EC_DEVID_IT8528:
+		ec.read = ec_io28_read;
+		ec.write = ec_io28_write;
+		ec.dev.id = IT8528;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	ec.dev.addr = EC_BASE_ADDR;
+
+	return ec_init();
+}
+
diff --git a/include/linux/mfd/imanager/core.h b/include/linux/mfd/imanager/core.h
new file mode 100644
index 0000000..05c77fa
--- /dev/null
+++ b/include/linux/mfd/imanager/core.h
@@ -0,0 +1,31 @@
+/*
+ * Advantech iManager MFD core
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch-ELdSlb/RfAS1Z/+hSey0Gg@public.gmane.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __CORE_H__
+#define __CORE_H__
+
+#include <linux/mutex.h>
+#include <linux/io.h>
+#include <linux/types.h>
+#include <linux/mfd/imanager/ec.h>
+
+struct imanager_platform_data {
+	const struct imanager_ec_device *dev;
+	const char *chip_name;
+};
+
+struct imanager_device_data {
+	struct device *dev;
+	struct mutex  lock;
+};
+
+#endif
diff --git a/include/linux/mfd/imanager/ec.h b/include/linux/mfd/imanager/ec.h
new file mode 100644
index 0000000..783f268
--- /dev/null
+++ b/include/linux/mfd/imanager/ec.h
@@ -0,0 +1,210 @@
+/*
+ * Advantech iManager core - firmware interface
+ *
+ * Copyright (C) 2016 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch-ELdSlb/RfAS1Z/+hSey0Gg@public.gmane.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __EC_H__
+#define __EC_H__
+
+#include <linux/types.h>
+
+#define EC_DEVID_IT8516			0x8516
+#define EC_DEVID_IT8518			0x8518
+#define EC_DEVID_IT8528			0x8528
+
+#define EC_BASE_ADDR			0x029C
+
+#define IT8516_CMD_PORT			0x029A /* it8528 */
+#define IT8516_DAT_PORT			0x0299
+
+#define IT8518_CMD_PORT			0x029E /* it8518 */
+#define IT8518_DAT_PORT			0x029F
+
+#define EC_GPIO_MAX_NUM			8
+#define EC_HWM_MAX_ADC			5
+#define EC_HWM_MAX_FAN			3
+#define EC_BLC_MAX_NUM			2
+#define EC_SMB_MAX_NUM			4
+#define EC_WDT_MAX_NUM			2
+
+#define PCB_NAME_SIZE			32
+#define EC_PAYLOAD_SIZE			40
+#define EC_MSG_SIZE			sizeof(struct ec_smb_message)
+
+#define LOBYTE16(x)			(x & 0x00FF)
+#define HIBYTE16(x)			(LOBYTE16(x >> 8))
+#define LOADDR16(x)			LOBYTE16(x)
+#define HIADDR16(x)			(x >= 0xF000 ? LOBYTE16(x >> 8) : 0)
+
+/*
+ * iManager commands
+ */
+#define EC_CMD_HWP_RD			0x11UL
+#define EC_CMD_HWP_WR			0x12UL
+#define EC_CMD_GPIO_DIR_RD		0x30UL
+#define EC_CMD_GPIO_DIR_WR		0x31UL
+#define EC_CMD_PWM_FREQ_RD		0x36UL
+#define EC_CMD_PWM_FREQ_WR		0x32UL
+#define EC_CMD_PWM_POL_RD		0x37UL
+#define EC_CMD_PWM_POL_WR		0x33UL
+#define EC_CMD_SMB_FREQ_RD		0x34UL
+#define EC_CMD_SMB_FREQ_WR		0x35UL
+#define EC_CMD_FAN_CTL_RD		0x40UL
+#define EC_CMD_FAN_CTL_WR		0x41UL
+#define EC_CMD_THZ_RD			0x42UL
+#define EC_CMD_DYN_TBL_RD		0x20UL
+#define EC_CMD_FW_INFO_RD		0xF0UL
+#define EC_CMD_BUF_CLR			0xC0UL
+#define EC_CMD_BUF_RD			0xC1UL
+#define EC_CMD_BUF_WR			0xC2UL
+#define EC_CMD_RAM_RD			0x1EUL
+#define EC_CMD_RAM_WR			0x1FUL
+#define EC_CMD_I2C_RW			0x0EUL
+#define EC_CMD_I2C_WR			0x0FUL
+#define EC_CMD_WDT_CTRL			0x28UL
+
+/*
+ * ACPI and HW RAM offsets
+ */
+#define EC_ACPIRAM_FAN_ALERT		0x6FUL
+#define EC_ACPIRAM_FAN_SPEED_LIMIT	0x76UL
+#define EC_ACPIRAM_BRIGHTNESS1		0x50UL
+#define EC_ACPIRAM_BRIGHTNESS2		0x52UL
+#define EC_ACPIRAM_BLC_CTRL		0x99UL
+#define EC_ACPIRAM_FW_RELEASE_RD	0xF8UL
+
+enum chips { IT8516, IT8518, IT8528 };
+
+struct ec_message_header {
+	u8 addr_low;	/* SMB low-byte address or data low-byte */
+			/* of byte-/word-transaction */
+	u8 addr_high;	/* SMB high-byte address or data high-byte */
+			/* of word-transaction */
+	u8 rlen;	/* SMB read length */
+	u8 wlen;	/* SMB write length */
+	u8 cmd;		/* SMB command */
+};
+
+struct ec_smb_message {
+	struct ec_message_header hdr;
+	u8 data[EC_PAYLOAD_SIZE];
+};
+
+struct ec_message {
+	u8 rlen;	/* EC message read length */
+	u8 wlen;	/* EC message write length */
+	union {
+		struct ec_smb_message smb;
+		u8 data[EC_MSG_SIZE];
+	} u;
+
+	u8 *data;
+};
+
+struct ec_version {
+	u32 kernel_major;
+	u32 kernel_minor;
+	u32 firmware_major;
+	u32 firmware_minor;
+	u32 type;
+};
+
+struct ec_info {
+	struct ec_version version;
+	char pcb_name[PCB_NAME_SIZE];
+};
+
+struct imanager_ec_device {
+	int		id; /* enum chip */
+	u16		addr;
+	struct ec_info	info;
+};
+
+struct ec_dev_attr {
+	int did;	/* Device ID */
+	int hwp;	/* Hardware Pin number */
+	int pol;	/* Polarity */
+	int scale;	/* Scaling factor */
+	const char *label;
+};
+
+struct imanager_gpio_device {
+	u32			num;
+	struct ec_dev_attr	attr[EC_GPIO_MAX_NUM];
+	struct ec_info		*info;
+};
+
+struct dev_adc {
+	u32			num;
+	struct ec_dev_attr	attr[EC_HWM_MAX_ADC];
+};
+
+struct dev_fan {
+	u32			num;
+	u32			active;
+	struct ec_dev_attr	attr[EC_HWM_MAX_FAN];
+};
+
+struct imanager_hwmon_device {
+	struct dev_adc		adc;
+	struct dev_fan		fan;
+	struct imanager_ec_device *ecdev;
+};
+
+struct imanager_i2c_device {
+	u32			num;
+	struct ec_dev_attr	attr[EC_SMB_MAX_NUM];
+	struct ec_dev_attr	*eeprom;
+	struct ec_dev_attr	*i2coem;
+	struct imanager_ec_device *ecdev;
+};
+
+struct imanager_backlight_device {
+	u32			num;
+	struct ec_dev_attr	attr[EC_BLC_MAX_NUM];
+	u8			brightness[EC_BLC_MAX_NUM];
+	struct ec_info		*info;
+};
+
+struct imanager_watchdog_device {
+	u32			num;
+	struct ec_dev_attr	attr[EC_WDT_MAX_NUM];
+	struct ec_dev_attr	*irq;
+	struct ec_dev_attr	*nmi;
+	struct ec_info		*info;
+};
+
+/* Must be called first, obviously */
+int imanager_ec_probe(void);
+
+int imanager_msg_write(u8 cmd, u8 param, struct ec_message *msg);
+int imanager_msg_read(u8 cmd, u8 param, struct ec_message *msg);
+
+int imanager_read_byte(u8 cmd, u8 param);
+int imanager_read_word(u8 cmd, u8 param);
+
+int imanager_write_byte(u8 cmd, u8 param, u8 byte);
+int imanager_write_word(u8 cmd, u8 param, u16 word);
+
+int imanager_acpiram_read_byte(u8 offset);
+int imanager_acpiram_write_byte(u8 offset, u8 value);
+int imanager_acpiram_read_block(u8 offset, u8 *buf, u8 len);
+int imanager_acpiram_write_block(u8 offset, u8 *buf, u8 len);
+
+int imanager_wait_proc_complete(u8 offset, int cond);
+
+const struct imanager_ec_device *imanager_get_ec_device(void);
+const struct imanager_hwmon_device *imanager_get_hwmon_device(void);
+const struct imanager_gpio_device *imanager_get_gpio_device(void);
+const struct imanager_i2c_device *imanager_get_i2c_device(void);
+const struct imanager_watchdog_device *imanager_get_watchdog_device(void);
+const struct imanager_backlight_device *imanager_get_backlight_device(void);
+
+#endif
-- 
2.6.4

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[PATCH] fix platform_no_drv_owner.cocci warnings

[kbuild test robot]

drivers/mfd/imanager-core.c:248:3-8: No need to set .owner here. The core will do it.

 Remove .owner field if calls are used which set it automatically

Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

CC: Richard Vidal-Dorsch <richard.dorsch@gmail.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---

 imanager-core.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/mfd/imanager-core.c
+++ b/drivers/mfd/imanager-core.c
@@ -245,7 +245,6 @@ static int imanager_remove(struct platfo
 
 static struct platform_driver imanager_driver = {
 	.driver = {
-		.owner = THIS_MODULE,
 		.name  = "imanager-core",
 	},
 	.probe	= imanager_probe,

Re: [PATCH 6/6] Add Advantech iManager Watchdog driver

[kbuild test robot]

Hi Richard,

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on v4.4-rc8 next-20160108]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/richard-dorsch-gmail-com/Add-Advantech-iManager-EC-driver-set/20160109-063329
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next


coccinelle warnings: (new ones prefixed by >>)

>> drivers/watchdog/imanager-wdt.c:322:3-8: No need to set .owner here. The core will do it.

Please review and possibly fold the followup patch.

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[PATCH] fix platform_no_drv_owner.cocci warnings

[kbuild test robot]

drivers/watchdog/imanager-wdt.c:322:3-8: No need to set .owner here. The core will do it.

 Remove .owner field if calls are used which set it automatically

Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

CC: Richard Vidal-Dorsch <richard.dorsch-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Signed-off-by: Fengguang Wu <fengguang.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---

 imanager-wdt.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/watchdog/imanager-wdt.c
+++ b/drivers/watchdog/imanager-wdt.c
@@ -319,7 +319,6 @@ static int imanager_wdt_remove(struct pl
 
 static struct platform_driver imanager_wdt_driver = {
 	.driver = {
-		.owner	= THIS_MODULE,
 		.name	= "imanager_wdt",
 	},
 	.probe	= imanager_wdt_probe,
--
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Re: [PATCH 2/6] Add Advantech iManager GPIO driver

[kbuild test robot]

Hi Richard,

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on v4.4-rc8 next-20160108]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/richard-dorsch-gmail-com/Add-Advantech-iManager-EC-driver-set/20160109-063329
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next


coccinelle warnings: (new ones prefixed by >>)

>> drivers/gpio/imanager-gpio.c:170:3-8: No need to set .owner here. The core will do it.

Please review and possibly fold the followup patch.

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[PATCH 2/6] Add Advantech iManager GPIO driver

[richard.dorsch]

From: Richard Vidal-Dorsch <richard.dorsch@gmail.com>

---
 drivers/gpio/Kconfig              |   8 ++
 drivers/gpio/Makefile             |   2 +
 drivers/gpio/imanager-ec-gpio.c   |  98 ++++++++++++++++++++
 drivers/gpio/imanager-gpio.c      | 182 ++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/imanager/gpio.h |  27 ++++++
 5 files changed, 317 insertions(+)
 create mode 100644 drivers/gpio/imanager-ec-gpio.c
 create mode 100644 drivers/gpio/imanager-gpio.c
 create mode 100644 include/linux/mfd/imanager/gpio.h

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index b18bea0..0f80947 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -765,6 +765,14 @@ config GPIO_DLN2
 	  This driver can also be built as a module. If so, the module
 	  will be called gpio-dln2.
 
+config GPIO_IMANAGER
+	tristate "Advantech iManager GPIO support"
+	depends on MFD_IMANAGER
+	help
+	  Say yes here to support Advantech iManager GPIO functionality
+	  of some Advantech SOM, MIO, AIMB, and PCM modules/boards.
+	  Requires mfd-core and imanager-core to function properly.
+
 config GPIO_JANZ_TTL
 	tristate "Janz VMOD-TTL Digital IO Module"
 	depends on MFD_JANZ_CMODIO
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 986dbd8..0df55e4 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -41,6 +41,8 @@ obj-$(CONFIG_GPIO_F7188X)	+= gpio-f7188x.o
 obj-$(CONFIG_GPIO_GE_FPGA)	+= gpio-ge.o
 obj-$(CONFIG_GPIO_GRGPIO)	+= gpio-grgpio.o
 obj-$(CONFIG_GPIO_ICH)		+= gpio-ich.o
+gpio-imanager-objs		:= imanager-gpio.o imanager-ec-gpio.o
+obj-$(CONFIG_GPIO_IMANAGER)	+= gpio-imanager.o
 obj-$(CONFIG_GPIO_IOP)		+= gpio-iop.o
 obj-$(CONFIG_GPIO_IT87)		+= gpio-it87.o
 obj-$(CONFIG_GPIO_JANZ_TTL)	+= gpio-janz-ttl.o
diff --git a/drivers/gpio/imanager-ec-gpio.c b/drivers/gpio/imanager-ec-gpio.c
new file mode 100644
index 0000000..cefc44d
--- /dev/null
+++ b/drivers/gpio/imanager-ec-gpio.c
@@ -0,0 +1,98 @@
+/*
+ * Advantech iManager GPIO core
+ *
+ * Copyright (C) 2015 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/bug.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/byteorder/generic.h>
+#include <linux/mfd/imanager/ec.h>
+#include <linux/mfd/imanager/gpio.h>
+
+#define EC_GPIOF_DIR_OUT	(1 << 6)
+#define EC_GPIOF_DIR_IN		(1 << 7)
+#define EC_GPIOF_LOW		(0 << 0)
+#define EC_GPIOF_HIGH		(1 << 0)
+
+/*
+ * Power-on default:
+ * GPIO[7..4] := Input
+ * GPIO[3..0] := Output
+ */
+
+static const struct imanager_gpio_device *gpio;
+
+int gpio_core_get_state(u32 num)
+{
+	int ret;
+
+	if (WARN_ON(num >= gpio->num))
+		return -EINVAL;
+
+	ret = imanager_read_byte(EC_CMD_HWP_RD, gpio->attr[num].did);
+	if (ret < 0)
+		pr_err("Failed to get GPIO pin state (%x)\n", num);
+
+	return ret;
+}
+
+int gpio_core_set_state(u32 num, bool state)
+{
+	int ret;
+
+	if (WARN_ON(num >= gpio->num))
+		return -EINVAL;
+
+	ret = imanager_write_byte(EC_CMD_HWP_WR, gpio->attr[num].did,
+			    state ? EC_GPIOF_HIGH : EC_GPIOF_LOW);
+	if (ret) {
+		pr_err("Failed to set GPIO pin state (%x)\n", num);
+		return ret;
+	}
+
+	return 0;
+}
+
+int gpio_core_set_direction(u32 num, int dir)
+{
+	int ret;
+
+	if (WARN_ON(num >= gpio->num))
+		return -EINVAL;
+
+	ret = imanager_write_byte(EC_CMD_GPIO_DIR_WR, gpio->attr[num].did,
+			    dir ? EC_GPIOF_DIR_IN : EC_GPIOF_DIR_OUT);
+	if (ret) {
+		pr_err("Failed to set GPIO direction (%x, '%s')\n", num,
+			dir == GPIOF_DIR_OUT ? "OUT" : "IN");
+		return ret;
+	}
+
+	return 0;
+}
+
+int gpio_core_get_max_count(void)
+{
+	return gpio->num;
+}
+
+int gpio_core_init(void)
+{
+	gpio = imanager_get_gpio_device();
+	if (!gpio)
+		return -ENODEV;
+
+	return 0;
+}
+
diff --git a/drivers/gpio/imanager-gpio.c b/drivers/gpio/imanager-gpio.c
new file mode 100644
index 0000000..3939c0f
--- /dev/null
+++ b/drivers/gpio/imanager-gpio.c
@@ -0,0 +1,182 @@
+/*
+ * Advantech iManager GPIO driver
+ *
+ * Copyright (C) 2015 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/mfd/imanager/core.h>
+#include <linux/mfd/imanager/gpio.h>
+
+struct imanager_gpio_data {
+	struct imanager_device_data *idev;
+	struct gpio_chip chip;
+};
+
+static inline struct imanager_gpio_data *
+to_imanager_gpio_data(struct gpio_chip *chip)
+{
+	return container_of(chip, struct imanager_gpio_data, chip);
+}
+
+static int imanager_direction_in(struct gpio_chip *chip, u32 gpio_num)
+{
+	struct imanager_gpio_data *data = to_imanager_gpio_data(chip);
+	int ret;
+
+	mutex_lock(&data->idev->lock);
+
+	ret = gpio_core_set_direction(gpio_num, GPIOF_DIR_IN);
+	if (ret) {
+		dev_err(chip->dev, "Failed to set direction to 'in' (%d)\n",
+			gpio_num);
+		ret = -EIO;
+	}
+
+	mutex_unlock(&data->idev->lock);
+
+	return ret;
+}
+
+static int
+imanager_direction_out(struct gpio_chip *chip, u32 gpio_num, int val)
+{
+	struct imanager_gpio_data *data = to_imanager_gpio_data(chip);
+	int ret;
+
+	mutex_lock(&data->idev->lock);
+
+	ret = gpio_core_set_direction(gpio_num, GPIOF_DIR_OUT);
+	if (ret) {
+		dev_err(chip->dev, "Failed to set direction to 'out' (%d)\n",
+			gpio_num);
+		ret = -EIO;
+	}
+
+	mutex_unlock(&data->idev->lock);
+
+	return ret;
+}
+
+static int imanager_get(struct gpio_chip *chip, u32 gpio_num)
+{
+	struct imanager_gpio_data *data = to_imanager_gpio_data(chip);
+	int ret;
+
+	mutex_lock(&data->idev->lock);
+
+	ret = gpio_core_get_state(gpio_num);
+	if (ret < 0) {
+		dev_err(chip->dev, "Failed to get status (%d)\n", gpio_num);
+		ret = -EIO;
+	}
+
+	mutex_unlock(&data->idev->lock);
+
+	return ret;
+}
+
+static void imanager_set(struct gpio_chip *chip, u32 gpio_num,
+			 int val)
+{
+	struct imanager_gpio_data *data = to_imanager_gpio_data(chip);
+	int ret;
+
+	mutex_lock(&data->idev->lock);
+
+	ret = gpio_core_set_state(gpio_num, val);
+	if (ret < 0)
+		dev_err(chip->dev, "Failed to set status (%d)\n", gpio_num);
+
+	mutex_unlock(&data->idev->lock);
+}
+
+static int imanager_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct imanager_device_data *idev = dev_get_drvdata(dev->parent);
+	struct imanager_gpio_data *data;
+	struct gpio_chip *chip;
+	int ret;
+
+	if (!idev) {
+		dev_err(dev, "Invalid platform data\n");
+		return -EINVAL;
+	}
+
+	ret = gpio_core_init();
+	if (ret) {
+		dev_err(dev, "Failed initializing GPIO core\n");
+		return ret;
+	}
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->idev = idev;
+
+	platform_set_drvdata(pdev, data);
+
+	chip = &data->chip;
+
+	chip->owner	= THIS_MODULE;
+	chip->dev	= dev;
+	chip->label	= "imanager_gpio";
+
+	chip->base	= -1;
+	chip->ngpio	= gpio_core_get_max_count();
+
+	chip->get	= imanager_get;
+	chip->set	= imanager_set;
+
+	chip->can_sleep	= 1;
+
+	chip->direction_input  = imanager_direction_in;
+	chip->direction_output = imanager_direction_out;
+
+	ret = gpiochip_add(chip);
+	if (ret < 0) {
+		dev_err(dev, "Failed to register driver\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int imanager_remove(struct platform_device *pdev)
+{
+	struct imanager_gpio_data *data = platform_get_drvdata(pdev);
+
+	gpiochip_remove(&data->chip);
+
+	return 0;
+}
+
+static struct platform_driver imanager_gpio_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= "imanager_gpio",
+	},
+	.probe	= imanager_gpio_probe,
+	.remove	= imanager_remove,
+};
+
+module_platform_driver(imanager_gpio_driver);
+
+MODULE_DESCRIPTION("Advantech iManager GPIO Driver");
+MODULE_AUTHOR("Richard Vidal-Dorsch <richard.dorsch at advantech.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imanager_gpio");
diff --git a/include/linux/mfd/imanager/gpio.h b/include/linux/mfd/imanager/gpio.h
new file mode 100644
index 0000000..7b76727
--- /dev/null
+++ b/include/linux/mfd/imanager/gpio.h
@@ -0,0 +1,27 @@
+/*
+ * Advantech iManager GPIO core
+ *
+ * Copyright (C) 2015 Advantech Co., Ltd., Irvine, CA, USA
+ * Author: Richard Vidal-Dorsch <richard.dorsch@advantech.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __GPIO_H__
+#define __GPIO_H__
+
+#include <linux/gpio.h>
+#include <linux/types.h>
+
+int gpio_core_init(void);
+
+int gpio_core_get_max_count(void);
+
+int gpio_core_get_state(u32 num);
+int gpio_core_set_state(u32 num, bool state);
+int gpio_core_set_direction(u32 num, int dir);
+
+#endif
-- 
2.6.4

[PATCH] fix platform_no_drv_owner.cocci warnings

[kbuild test robot]

drivers/gpio/imanager-gpio.c:170:3-8: No need to set .owner here. The core will do it.

 Remove .owner field if calls are used which set it automatically

Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

CC: Richard Vidal-Dorsch <richard.dorsch@gmail.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---

 imanager-gpio.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/gpio/imanager-gpio.c
+++ b/drivers/gpio/imanager-gpio.c
@@ -167,7 +167,6 @@ static int imanager_remove(struct platfo
 
 static struct platform_driver imanager_gpio_driver = {
 	.driver = {
-		.owner	= THIS_MODULE,
 		.name	= "imanager_gpio",
 	},
 	.probe	= imanager_gpio_probe,