hwmon: New driver for the Analog Devices ADM1029 (cae2caae) · Commits · e / devices / android_kernel_teracube_emerald

MAINTAINERS

+6 −0

Original line number	Original line	Diff line number	Diff line
	@@ -268,6 +268,12 @@ M: khali@linux-fr.org
	L: lm-sensors@lm-sensors.org		L: lm-sensors@lm-sensors.org
	S: Maintained		S: Maintained

			ADM1029 HARDWARE MONITOR DRIVER
			P: Corentin Labbe
			M: corentin.labbe@geomatys.fr
			L: lm-sensors@lm-sensors.org
			S: Maintained

	ADT746X FAN DRIVER		ADT746X FAN DRIVER
	P: Colin Leroy		P: Colin Leroy
	M: colin@colino.net		M: colin@colino.net

drivers/hwmon/Kconfig

+11 −0

Original line number	Original line	Diff line number	Diff line
	@@ -73,6 +73,17 @@ config SENSORS_ADM1026
	This driver can also be built as a module. If so, the module		This driver can also be built as a module. If so, the module
	will be called adm1026.		will be called adm1026.

			config SENSORS_ADM1029
			tristate "Analog Devices ADM1029"
			depends on HWMON && I2C && EXPERIMENTAL
			help
			If you say yes here you get support for Analog Devices ADM1029
			sensor chip.
			Very rare chip, please let us know you use it.

			This driver can also be built as a module. If so, the module
			will be called adm1029.

	config SENSORS_ADM1031		config SENSORS_ADM1031
	tristate "Analog Devices ADM1031 and compatibles"		tristate "Analog Devices ADM1031 and compatibles"
	depends on HWMON && I2C && EXPERIMENTAL		depends on HWMON && I2C && EXPERIMENTAL

drivers/hwmon/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -17,6 +17,7 @@ obj-$(CONFIG_SENSORS_ABITUGURU) += abituguru.o
	obj-$(CONFIG_SENSORS_ADM1021) += adm1021.o		obj-$(CONFIG_SENSORS_ADM1021) += adm1021.o
	obj-$(CONFIG_SENSORS_ADM1025) += adm1025.o		obj-$(CONFIG_SENSORS_ADM1025) += adm1025.o
	obj-$(CONFIG_SENSORS_ADM1026) += adm1026.o		obj-$(CONFIG_SENSORS_ADM1026) += adm1026.o
			obj-$(CONFIG_SENSORS_ADM1029) += adm1029.o
	obj-$(CONFIG_SENSORS_ADM1031) += adm1031.o		obj-$(CONFIG_SENSORS_ADM1031) += adm1031.o
	obj-$(CONFIG_SENSORS_ADM9240) += adm9240.o		obj-$(CONFIG_SENSORS_ADM9240) += adm9240.o
	obj-$(CONFIG_SENSORS_AMS) += ams/		obj-$(CONFIG_SENSORS_AMS) += ams/

drivers/hwmon/adm1029.c

0 → 100644

+508 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring
			*
			* Copyright (C) 2006 Corentin LABBE <corentin.labbe@geomatys.fr>
			*
			* Based on LM83 Driver by Jean Delvare <khali@linux-fr.org>
			*
			* Give only processor, motherboard temperatures and fan tachs
			* Very rare chip please let me know if you use it
			*
			* http://www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf
			*
			*
			* 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 version 2 of the License
			*
			* This program is distributed in the hope that it will be useful,
			* but WITHOUT ANY WARRANTY; without even the implied warranty of
			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
			* GNU General Public License for more details.
			*
			* You should have received a copy of the GNU General Public License
			* along with this program; if not, write to the Free Software
			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
			*/

			#include <linux/module.h>
			#include <linux/init.h>
			#include <linux/slab.h>
			#include <linux/jiffies.h>
			#include <linux/i2c.h>
			#include <linux/hwmon-sysfs.h>
			#include <linux/hwmon.h>
			#include <linux/err.h>
			#include <linux/mutex.h>

			/*
			* Addresses to scan
			*/

			static unsigned short normal_i2c[] = {
			0x28, 0x29, 0x2a,
			0x2b, 0x2c, 0x2d,
			0x2e, 0x2f, I2C_CLIENT_END
			};

			/*
			* Insmod parameters
			*/

			I2C_CLIENT_INSMOD_1(adm1029);

			/*
			* The ADM1029 registers
			* Manufacturer ID is 0x41 for Analog Devices
			*/

			#define ADM1029_REG_MAN_ID 0x0D
			#define ADM1029_REG_CHIP_ID 0x0E
			#define ADM1029_REG_CONFIG 0x01
			#define ADM1029_REG_NB_FAN_SUPPORT 0x02

			#define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06

			#define ADM1029_REG_LOCAL_TEMP 0xA0
			#define ADM1029_REG_REMOTE1_TEMP 0xA1
			#define ADM1029_REG_REMOTE2_TEMP 0xA2

			#define ADM1029_REG_LOCAL_TEMP_HIGH 0x90
			#define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91
			#define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92

			#define ADM1029_REG_LOCAL_TEMP_LOW 0x98
			#define ADM1029_REG_REMOTE1_TEMP_LOW 0x99
			#define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A

			#define ADM1029_REG_FAN1 0x70
			#define ADM1029_REG_FAN2 0x71

			#define ADM1029_REG_FAN1_MIN 0x78
			#define ADM1029_REG_FAN2_MIN 0x79

			#define ADM1029_REG_FAN1_CONFIG 0x68
			#define ADM1029_REG_FAN2_CONFIG 0x69

			#define TEMP_FROM_REG(val) ((val) * 1000)

			#define DIV_FROM_REG(val) ( 1 << (((val) >> 6) - 1))

			/* Registers to be checked by adm1029_update_device() */
			static const u8 ADM1029_REG_TEMP[] = {
			ADM1029_REG_LOCAL_TEMP,
			ADM1029_REG_REMOTE1_TEMP,
			ADM1029_REG_REMOTE2_TEMP,
			ADM1029_REG_LOCAL_TEMP_HIGH,
			ADM1029_REG_REMOTE1_TEMP_HIGH,
			ADM1029_REG_REMOTE2_TEMP_HIGH,
			ADM1029_REG_LOCAL_TEMP_LOW,
			ADM1029_REG_REMOTE1_TEMP_LOW,
			ADM1029_REG_REMOTE2_TEMP_LOW,
			};

			static const u8 ADM1029_REG_FAN[] = {
			ADM1029_REG_FAN1,
			ADM1029_REG_FAN2,
			ADM1029_REG_FAN1_MIN,
			ADM1029_REG_FAN2_MIN,
			};

			static const u8 ADM1029_REG_FAN_DIV[] = {
			ADM1029_REG_FAN1_CONFIG,
			ADM1029_REG_FAN2_CONFIG,
			};

			/*
			* Functions declaration
			*/

			static int adm1029_attach_adapter(struct i2c_adapter *adapter);
			static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind);
			static int adm1029_detach_client(struct i2c_client *client);
			static struct adm1029_data adm1029_update_device(struct device dev);
			static int adm1029_init_client(struct i2c_client *client);

			/*
			* Driver data (common to all clients)
			*/

			static struct i2c_driver adm1029_driver = {
			.driver = {
			.name = "adm1029",
			},
			.attach_adapter = adm1029_attach_adapter,
			.detach_client = adm1029_detach_client,
			};

			/*
			* Client data (each client gets its own)
			*/

			struct adm1029_data {
			struct i2c_client client;
			struct class_device *class_dev;
			struct mutex update_lock;
			char valid; /* zero until following fields are valid */
			unsigned long last_updated; /* in jiffies */

			/* registers values, signed for temperature, unsigned for other stuff */
			s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)];
			u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)];
			u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)];
			};

			/*
			* Sysfs stuff
			*/

			static ssize_t
			show_temp(struct device dev, struct device_attribute devattr, char *buf)
			{
			struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
			struct adm1029_data *data = adm1029_update_device(dev);
			return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
			}

			static ssize_t
			show_fan(struct device dev, struct device_attribute devattr, char *buf)
			{
			struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
			struct adm1029_data *data = adm1029_update_device(dev);
			u16 val;
			if (data->fan[attr->index] == 0 \|\| data->fan_div[attr->index] == 0
			\|\| data->fan[attr->index] == 255) {
			return sprintf(buf, "0\n");
			}

			val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index])
			/ data->fan[attr->index];
			return sprintf(buf, "%d\n", val);
			}

			static ssize_t
			show_fan_div(struct device dev, struct device_attribute devattr, char *buf)
			{
			struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
			struct adm1029_data *data = adm1029_update_device(dev);
			if (data->fan_div[attr->index] == 0)
			return sprintf(buf, "0\n");
			return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
			}

			static ssize_t set_fan_div(struct device *dev,
			struct device_attribute devattr, const char buf, size_t count)
			{
			struct i2c_client *client = to_i2c_client(dev);
			struct adm1029_data *data = i2c_get_clientdata(client);
			struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
			long val = simple_strtol(buf, NULL, 10);
			u8 reg;

			mutex_lock(&data->update_lock);

			/Read actual config /
			reg = i2c_smbus_read_byte_data(client,
			ADM1029_REG_FAN_DIV[attr->index]);

			switch (val) {
			case 1:
			val = 1;
			break;
			case 2:
			val = 2;
			break;
			case 4:
			val = 3;
			break;
			default:
			mutex_unlock(&data->update_lock);
			dev_err(&client->dev, "fan_div value %ld not "
			"supported. Choose one of 1, 2 or 4!\n", val);
			return -EINVAL;
			}
			/* Update the value */
			reg = (reg & 0x3F) \| (val << 6);

			/* Write value */
			i2c_smbus_write_byte_data(client,
			ADM1029_REG_FAN_DIV[attr->index], reg);
			mutex_unlock(&data->update_lock);

			return count;
			}

			/*
			Access rights on sysfs, S_IRUGO stand for Is Readable by User, Group and Others
			S_IWUSR stand for Is Writable by User
			*/
			static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
			static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
			static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);

			static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 3);
			static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp, NULL, 4);
			static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp, NULL, 5);

			static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp, NULL, 6);
			static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp, NULL, 7);
			static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp, NULL, 8);

			static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
			static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);

			static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan, NULL, 2);
			static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan, NULL, 3);

			static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO \| S_IWUSR,
			show_fan_div, set_fan_div, 0);
			static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO \| S_IWUSR,
			show_fan_div, set_fan_div, 1);

			static struct attribute *adm1029_attributes[] = {
			&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_temp2_input.dev_attr.attr,
			&sensor_dev_attr_temp2_min.dev_attr.attr,
			&sensor_dev_attr_temp2_max.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_fan1_input.dev_attr.attr,
			&sensor_dev_attr_fan2_input.dev_attr.attr,
			&sensor_dev_attr_fan1_min.dev_attr.attr,
			&sensor_dev_attr_fan2_min.dev_attr.attr,
			&sensor_dev_attr_fan1_div.dev_attr.attr,
			&sensor_dev_attr_fan2_div.dev_attr.attr,
			NULL
			};

			static const struct attribute_group adm1029_group = {
			.attrs = adm1029_attributes,
			};

			/*
			* Real code
			*/

			static int adm1029_attach_adapter(struct i2c_adapter *adapter)
			{
			if (!(adapter->class & I2C_CLASS_HWMON))
			return 0;
			return i2c_probe(adapter, &addr_data, adm1029_detect);
			}

			/*
			* The following function does more than just detection. If detection
			* succeeds, it also registers the new chip.
			*/

			static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind)
			{
			struct i2c_client *client;
			struct adm1029_data *data;
			int err = 0;
			const char *name = "";
			if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
			goto exit;

			if (!(data = kzalloc(sizeof(struct adm1029_data), GFP_KERNEL))) {
			err = -ENOMEM;
			goto exit;
			}

			client = &data->client;
			i2c_set_clientdata(client, data);
			client->addr = address;
			client->adapter = adapter;
			client->driver = &adm1029_driver;

			/* Now we do the detection and identification. A negative kind
			* means that the driver was loaded with no force parameter
			* (default), so we must both detect and identify the chip
			* (actually there is only one possible kind of chip for now, adm1029).
			* A zero kind means that the driver was loaded with the force
			* parameter, the detection step shall be skipped. A positive kind
			* means that the driver was loaded with the force parameter and a
			* given kind of chip is requested, so both the detection and the
			* identification steps are skipped. */

			/* Default to an adm1029 if forced */
			if (kind == 0)
			kind = adm1029;

			/* ADM1029 doesn't have CHIP ID, check just MAN ID
			* For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED,
			* ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values
			* documented
			*/

			if (kind <= 0) { /* identification */
			u8 man_id, chip_id, temp_devices_installed, nb_fan_support;

			man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID);
			chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID);
			temp_devices_installed = i2c_smbus_read_byte_data(client,
			ADM1029_REG_TEMP_DEVICES_INSTALLED);
			nb_fan_support = i2c_smbus_read_byte_data(client,
			ADM1029_REG_NB_FAN_SUPPORT);
			/* 0x41 is Analog Devices */
			if (man_id == 0x41 && (temp_devices_installed & 0xf9) == 0x01
			&& nb_fan_support == 0x03) {
			if ((chip_id & 0xF0) == 0x00) {
			kind = adm1029;
			} else {
			/* There are no "official" CHIP ID, so actually
			* we use Major/Minor revision for that */
			printk(KERN_INFO
			"adm1029: Unknown major revision %x, "
			"please let us know\n", chip_id);
			}
			}

			if (kind <= 0) { /* identification failed */
			pr_debug("adm1029: Unsupported chip (man_id=0x%02X, "
			"chip_id=0x%02X)\n", man_id, chip_id);
			goto exit_free;
			}
			}

			if (kind == adm1029) {
			name = "adm1029";
			}

			/* We can fill in the remaining client fields */
			strlcpy(client->name, name, I2C_NAME_SIZE);
			mutex_init(&data->update_lock);

			/* Tell the I2C layer a new client has arrived */
			if ((err = i2c_attach_client(client)))
			goto exit_free;

			/*
			* Initialize the ADM1029 chip
			* Check config register
			*/
			if (adm1029_init_client(client) == 0)
			goto exit_detach;

			/* Register sysfs hooks */
			if ((err = sysfs_create_group(&client->dev.kobj, &adm1029_group)))
			goto exit_detach;

			data->class_dev = hwmon_device_register(&client->dev);
			if (IS_ERR(data->class_dev)) {
			err = PTR_ERR(data->class_dev);
			goto exit_remove_files;
			}

			return 0;

			exit_remove_files:
			sysfs_remove_group(&client->dev.kobj, &adm1029_group);
			exit_detach:
			i2c_detach_client(client);
			exit_free:
			kfree(data);
			exit:
			return err;
			}

			static int adm1029_init_client(struct i2c_client *client)
			{
			u8 config;
			config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
			if ((config & 0x10) == 0) {
			i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
			config \| 0x10);
			}
			/* recheck config */
			config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
			if ((config & 0x10) == 0) {
			dev_err(&client->dev, "Initialization failed!\n");
			return 0;
			}
			return 1;
			}

			static int adm1029_detach_client(struct i2c_client *client)
			{
			struct adm1029_data *data = i2c_get_clientdata(client);
			int err;

			hwmon_device_unregister(data->class_dev);
			sysfs_remove_group(&client->dev.kobj, &adm1029_group);

			if ((err = i2c_detach_client(client)))
			return err;

			kfree(data);
			return 0;
			}

			/*
			function that update the status of the chips (temperature for exemple)
			*/
			static struct adm1029_data adm1029_update_device(struct device dev)
			{
			struct i2c_client *client = to_i2c_client(dev);
			struct adm1029_data *data = i2c_get_clientdata(client);

			mutex_lock(&data->update_lock);
			/*
			* Use the "cache" Luke, don't recheck values
			* if there are already checked not a long time later
			*/
			if (time_after(jiffies, data->last_updated + HZ * 2)
			\|\| !data->valid) {
			int nr;

			dev_dbg(&client->dev, "Updating adm1029 data\n");

			for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) {
			data->temp[nr] =
			i2c_smbus_read_byte_data(client,
			ADM1029_REG_TEMP[nr]);
			}
			for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) {
			data->fan[nr] =
			i2c_smbus_read_byte_data(client,
			ADM1029_REG_FAN[nr]);
			}
			for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) {
			data->fan_div[nr] =
			i2c_smbus_read_byte_data(client,
			ADM1029_REG_FAN_DIV[nr]);
			}

			data->last_updated = jiffies;
			data->valid = 1;
			}

			mutex_unlock(&data->update_lock);

			return data;
			}

			/*
			Common module stuff
			*/
			static int __init sensors_adm1029_init(void)
			{

			return i2c_add_driver(&adm1029_driver);
			}

			static void __exit sensors_adm1029_exit(void)
			{

			i2c_del_driver(&adm1029_driver);
			}

			MODULE_AUTHOR("Corentin LABBE <corentin.labbe@geomatys.fr>");
			MODULE_DESCRIPTION("adm1029 driver");
			MODULE_LICENSE("GPL v2");

			module_init(sensors_adm1029_init);
			module_exit(sensors_adm1029_exit);