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,

[PATCH] fix platform_no_drv_owner.cocci warnings

[kbuild test robot]

drivers/pinctrl/pinctrl-max77620.c:472:3-8: 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: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---

 pinctrl-max77620.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/pinctrl/pinctrl-max77620.c
+++ b/drivers/pinctrl/pinctrl-max77620.c
@@ -469,7 +469,6 @@ static int max77620_pinctrl_remove(struc
 static struct platform_driver max77620_pinctrl_driver = {
 	.driver = {
 		.name = "max77620-pinctrl",
-		.owner = THIS_MODULE,
 	},
 	.probe = max77620_pinctrl_probe,
 	.remove = max77620_pinctrl_remove,

Re: [PATCH] fix platform_no_drv_owner.cocci warnings

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 1160 bytes --]

On Sun, Mar 29, 2015 at 03:49:20PM +0800, kbuild test robot wrote:
> drivers/pinctrl/pinctrl-max77620.c:472:3-8: 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: Alexandre Courbot <acourbot@nvidia.com>
> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
> ---
> 
>  pinctrl-max77620.c |    1 -
>  1 file changed, 1 deletion(-)

Hi Linus,

please ignore this. It's from a staging tree and against a driver that
doesn't exist upstream yet. I have for now removed these branches from
my github tree completely until we can figure out a way to keep the 0-
day builder from generating these patches.

Thierry

> --- a/drivers/pinctrl/pinctrl-max77620.c
> +++ b/drivers/pinctrl/pinctrl-max77620.c
> @@ -469,7 +469,6 @@ static int max77620_pinctrl_remove(struc
>  static struct platform_driver max77620_pinctrl_driver = {
>  	.driver = {
>  		.name = "max77620-pinctrl",
> -		.owner = THIS_MODULE,
>  	},
>  	.probe = max77620_pinctrl_probe,
>  	.remove = max77620_pinctrl_remove,

[-- Attachment #2: Type: application/pgp-signature, Size: 819 bytes --]

Re: [PATCH] fix platform_no_drv_owner.cocci warnings

[Linus Walleij]

On Mon, Mar 30, 2015 at 3:05 PM, Thierry Reding <treding@nvidia.com> wrote:
> On Sun, Mar 29, 2015 at 03:49:20PM +0800, kbuild test robot wrote:
>> drivers/pinctrl/pinctrl-max77620.c:472:3-8: 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: Alexandre Courbot <acourbot@nvidia.com>
>> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
>> ---
>>
>>  pinctrl-max77620.c |    1 -
>>  1 file changed, 1 deletion(-)
>
> Hi Linus,
>
> please ignore this. It's from a staging tree and against a driver that
> doesn't exist upstream yet. I have for now removed these branches from
> my github tree completely until we can figure out a way to keep the 0-
> day builder from generating these patches.

Bah no big deal, I think I managed to fire off a similar thing on
a PWM driver down your path :P

Fengguang said he'd fixed it though IIRC.

Yours,
Linus Walleij

Re: [PATCH] fix platform_no_drv_owner.cocci warnings

[Fengguang Wu]

On Tue, Apr 07, 2015 at 03:09:46PM +0200, Linus Walleij wrote:
> On Mon, Mar 30, 2015 at 3:05 PM, Thierry Reding <treding@nvidia.com> wrote:
> > On Sun, Mar 29, 2015 at 03:49:20PM +0800, kbuild test robot wrote:
> >> drivers/pinctrl/pinctrl-max77620.c:472:3-8: 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: Alexandre Courbot <acourbot@nvidia.com>
> >> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
> >> ---
> >>
> >>  pinctrl-max77620.c |    1 -
> >>  1 file changed, 1 deletion(-)
> >
> > Hi Linus,
> >
> > please ignore this. It's from a staging tree and against a driver that
> > doesn't exist upstream yet. I have for now removed these branches from
> > my github tree completely until we can figure out a way to keep the 0-
> > day builder from generating these patches.
> 
> Bah no big deal, I think I managed to fire off a similar thing on
> a PWM driver down your path :P
> 
> Fengguang said he'd fixed it though IIRC.

Yes sorry for the noise! I've listed Thierry's tree as private report
tree (the black list way).  Perhaps would be better to make the logic
white list based -- then it will be completely noise free.

Thanks,
Fengguang