cregit-Linux how code gets into the kernel

Release 4.14 drivers/hwmon/lm87.c

Directory: drivers/hwmon
/*
 * lm87.c
 *
 * Copyright (C) 2000       Frodo Looijaard <frodol@dds.nl>
 *                          Philip Edelbrock <phil@netroedge.com>
 *                          Stephen Rousset <stephen.rousset@rocketlogix.com>
 *                          Dan Eaton <dan.eaton@rocketlogix.com>
 * Copyright (C) 2004-2008  Jean Delvare <jdelvare@suse.de>
 *
 * Original port to Linux 2.6 by Jeff Oliver.
 *
 * The LM87 is a sensor chip made by National Semiconductor. It monitors up
 * to 8 voltages (including its own power source), up to three temperatures
 * (its own plus up to two external ones) and up to two fans. The default
 * configuration is 6 voltages, two temperatures and two fans (see below).
 * Voltages are scaled internally with ratios such that the nominal value of
 * each voltage correspond to a register value of 192 (which means a
 * resolution of about 0.5% of the nominal value). Temperature values are
 * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete
 * datasheet can be obtained from National's website at:
 *   http://www.national.com/pf/LM/LM87.html
 *
 * Some functions share pins, so not all functions are available at the same
 * time. Which are depends on the hardware setup. This driver normally
 * assumes that firmware configured the chip correctly. Where this is not
 * the case, platform code must set the I2C client's platform_data to point
 * to a u8 value to be written to the channel register.
 * For reference, here is the list of exclusive functions:
 *  - in0+in5 (default) or temp3
 *  - fan1 (default) or in6
 *  - fan2 (default) or in7
 *  - VID lines (default) or IRQ lines (not handled by this driver)
 *
 * The LM87 additionally features an analog output, supposedly usable to
 * control the speed of a fan. All new chips use pulse width modulation
 * instead. The LM87 is the only hardware monitoring chipset I know of
 * which uses amplitude modulation. Be careful when using this feature.
 *
 * This driver also supports the ADM1024, a sensor chip made by Analog
 * Devices. That chip is fully compatible with the LM87. Complete
 * datasheet can be obtained from Analog's website at:
 *   http://www.analog.com/en/prod/0,2877,ADM1024,00.html
 *
 * 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.
 *
 * 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.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/regulator/consumer.h>

/*
 * Addresses to scan
 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
 */


static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };

/*
 * The LM87 registers
 */

/* nr in 0..5 */

#define LM87_REG_IN(nr)			(0x20 + (nr))

#define LM87_REG_IN_MAX(nr)		(0x2B + (nr) * 2)

#define LM87_REG_IN_MIN(nr)		(0x2C + (nr) * 2)
/* nr in 0..1 */

#define LM87_REG_AIN(nr)		(0x28 + (nr))

#define LM87_REG_AIN_MIN(nr)		(0x1A + (nr))

#define LM87_REG_AIN_MAX(nr)		(0x3B + (nr))


static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };

static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };

static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };


#define LM87_REG_TEMP_HW_INT_LOCK	0x13

#define LM87_REG_TEMP_HW_EXT_LOCK	0x14

#define LM87_REG_TEMP_HW_INT		0x17

#define LM87_REG_TEMP_HW_EXT		0x18

/* nr in 0..1 */

#define LM87_REG_FAN(nr)		(0x28 + (nr))

#define LM87_REG_FAN_MIN(nr)		(0x3B + (nr))

#define LM87_REG_AOUT			0x19


#define LM87_REG_CONFIG			0x40

#define LM87_REG_CHANNEL_MODE		0x16

#define LM87_REG_VID_FAN_DIV		0x47

#define LM87_REG_VID4			0x49


#define LM87_REG_ALARMS1		0x41

#define LM87_REG_ALARMS2		0x42


#define LM87_REG_COMPANY_ID		0x3E

#define LM87_REG_REVISION		0x3F

/*
 * Conversions and various macros
 * The LM87 uses signed 8-bit values for temperatures.
 */


#define IN_FROM_REG(reg, scale)	(((reg) * (scale) + 96) / 192)

#define IN_TO_REG(val, scale)	((val) <= 0 ? 0 : \
                                 (val) >= (scale) * 255 / 192 ? 255 : \
                                 ((val) * 192 + (scale) / 2) / (scale))


#define TEMP_FROM_REG(reg)	((reg) * 1000)

#define TEMP_TO_REG(val)	((val) <= -127500 ? -128 : \
                                 (val) >= 126500 ? 127 : \
                                 (((val) < 0 ? (val) - 500 : \
                                   (val) + 500) / 1000))


#define FAN_FROM_REG(reg, div)	((reg) == 255 || (reg) == 0 ? 0 : \
                                 (1350000 + (reg)*(div) / 2) / ((reg) * (div)))

#define FAN_TO_REG(val, div)	((val) * (div) * 255 <= 1350000 ? 255 : \
                                 (1350000 + (val)*(div) / 2) / ((val) * (div)))


#define FAN_DIV_FROM_REG(reg)	(1 << (reg))

/* analog out is 9.80mV/LSB */

#define AOUT_FROM_REG(reg)	(((reg) * 98 + 5) / 10)

#define AOUT_TO_REG(val)	((val) <= 0 ? 0 : \
                                 (val) >= 2500 ? 255 : \
                                 ((val) * 10 + 49) / 98)

/* nr in 0..1 */

#define CHAN_NO_FAN(nr)		(1 << (nr))

#define CHAN_TEMP3		(1 << 2)

#define CHAN_VCC_5V		(1 << 3)

#define CHAN_NO_VID		(1 << 7)

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


struct lm87_data {
	
struct mutex update_lock;
	
char valid; /* zero until following fields are valid */
	
unsigned long last_updated; /* In jiffies */

	
u8 channel;		/* register value */
	
u8 config;		/* original register value */

	
u8 in[8];		/* register value */
	
u8 in_max[8];		/* register value */
	
u8 in_min[8];		/* register value */
	
u16 in_scale[8];

	
s8 temp[3];		/* register value */
	
s8 temp_high[3];	/* register value */
	
s8 temp_low[3];		/* register value */
	
s8 temp_crit_int;	/* min of two register values */
	
s8 temp_crit_ext;	/* min of two register values */

	
u8 fan[2];		/* register value */
	
u8 fan_min[2];		/* register value */
	
u8 fan_div[2];		/* register value, shifted right */
	
u8 aout;		/* register value */

	
u16 alarms;		/* register values, combined */
	
u8 vid;			/* register values, combined */
	
u8 vrm;

	
const struct attribute_group *attr_groups[6];
};


static inline int lm87_read_value(struct i2c_client *client, u8 reg) { return i2c_smbus_read_byte_data(client, reg); }

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static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) { return i2c_smbus_write_byte_data(client, reg, value); }

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static struct lm87_data *lm87_update_device(struct device *dev) { struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { int i, j; dev_dbg(&client->dev, "Updating data.\n"); i = (data->channel & CHAN_TEMP3) ? 1 : 0; j = (data->channel & CHAN_TEMP3) ? 5 : 6; for (; i < j; i++) { data->in[i] = lm87_read_value(client, LM87_REG_IN(i)); data->in_min[i] = lm87_read_value(client, LM87_REG_IN_MIN(i)); data->in_max[i] = lm87_read_value(client, LM87_REG_IN_MAX(i)); } for (i = 0; i < 2; i++) { if (data->channel & CHAN_NO_FAN(i)) { data->in[6+i] = lm87_read_value(client, LM87_REG_AIN(i)); data->in_max[6+i] = lm87_read_value(client, LM87_REG_AIN_MAX(i)); data->in_min[6+i] = lm87_read_value(client, LM87_REG_AIN_MIN(i)); } else { data->fan[i] = lm87_read_value(client, LM87_REG_FAN(i)); data->fan_min[i] = lm87_read_value(client, LM87_REG_FAN_MIN(i)); } } j = (data->channel & CHAN_TEMP3) ? 3 : 2; for (i = 0 ; i < j; i++) { data->temp[i] = lm87_read_value(client, LM87_REG_TEMP[i]); data->temp_high[i] = lm87_read_value(client, LM87_REG_TEMP_HIGH[i]); data->temp_low[i] = lm87_read_value(client, LM87_REG_TEMP_LOW[i]); } i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); data->temp_crit_int = min(i, j); i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); data->temp_crit_ext = min(i, j); i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); data->fan_div[0] = (i >> 4) & 0x03; data->fan_div[1] = (i >> 6) & 0x03; data->vid = (i & 0x0F) | (lm87_read_value(client, LM87_REG_VID4) & 0x01) << 4; data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) | (lm87_read_value(client, LM87_REG_ALARMS2) << 8); data->aout = lm87_read_value(client, LM87_REG_AOUT); data->last_updated = jiffies; data->valid = 1; } mutex_unlock(&data->update_lock); return data; }

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/* * Sysfs stuff */
static ssize_t show_in_input(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int nr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%u\n", IN_FROM_REG(data->in[nr], data->in_scale[nr])); }

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static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int nr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[nr], data->in_scale[nr])); }

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static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int nr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[nr], data->in_scale[nr])); }

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static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); lm87_write_value(client, nr < 6 ? LM87_REG_IN_MIN(nr) : LM87_REG_AIN_MIN(nr - 6), data->in_min[nr]); mutex_unlock(&data->update_lock); return count; }

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static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); lm87_write_value(client, nr < 6 ? LM87_REG_IN_MAX(nr) : LM87_REG_AIN_MAX(nr - 6), data->in_max[nr]); mutex_unlock(&data->update_lock); return count; }

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Total145100.00%7100.00%

#define set_in(offset) \ static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ show_in_input, NULL, offset); \ static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ show_in_min, set_in_min, offset); \ static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ show_in_max, set_in_max, offset) set_in(0); set_in(1); set_in(2); set_in(3); set_in(4); set_in(5); set_in(6); set_in(7);
static ssize_t show_temp_input(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int nr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); }

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static ssize_t show_temp_low(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int nr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); }

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static ssize_t show_temp_high(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int nr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); }

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static ssize_t set_temp_low(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->temp_low[nr] = TEMP_TO_REG(val); lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); mutex_unlock(&data->update_lock); return count; }

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static ssize_t set_temp_high(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->temp_high[nr] = TEMP_TO_REG(val); lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); mutex_unlock(&data->update_lock); return count; }

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#define set_temp(offset) \ static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ show_temp_input, NULL, offset - 1); \ static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ show_temp_high, set_temp_high, offset - 1); \ static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ show_temp_low, set_temp_low, offset - 1) set_temp(1); set_temp(2); set_temp(3);
static ssize_t temp1_crit_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); }

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static ssize_t temp2_crit_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); }

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static DEVICE_ATTR_RO(temp1_crit); static DEVICE_ATTR_RO(temp2_crit); static DEVICE_ATTR(temp3_crit, S_IRUGO, temp2_crit_show, NULL);
static ssize_t show_fan_input(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int nr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], FAN_DIV_FROM_REG(data->fan_div[nr]))); }

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static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int nr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], FAN_DIV_FROM_REG(data->fan_div[nr]))); }

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static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int nr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr])); }

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static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->fan_min[nr] = FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr])); lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); mutex_unlock(&data->update_lock); return count; }

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/* * Note: we save and restore the fan minimum here, because its value is * determined in part by the fan clock divider. This follows the principle * of least surprise; the user doesn't expect the fan minimum to change just * because the divider changed. */
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; int err; unsigned long min; u8 reg; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); min = FAN_FROM_REG(data->fan_min[nr], FAN_DIV_FROM_REG(data->fan_div[nr])); switch (val) { case 1: data->fan_div[nr] = 0; break; case 2: data->fan_div[nr] = 1; break; case 4: data->fan_div[nr] = 2; break; case 8: data->fan_div[nr] = 3; break; default: mutex_unlock(&data->update_lock); return -EINVAL; } reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); switch (nr) { case 0: reg = (reg & 0xCF) | (data->fan_div[0] << 4); break; case 1: reg = (reg & 0x3F) | (data->fan_div[1] << 6); break; } lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); data->fan_min[nr] = FAN_TO_REG(min, val); lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); mutex_unlock(&data->update_lock); return count; }

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#define set_fan(offset) \ static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ show_fan_input, NULL, offset - 1); \ static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ show_fan_min, set_fan_min, offset - 1); \ static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ show_fan_div, set_fan_div, offset - 1) set_fan(1); set_fan(2);
static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); return sprintf(buf, "%d\n", data->alarms); }

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static DEVICE_ATTR_RO(alarms);
static ssize_t cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); }

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static DEVICE_ATTR_RO(cpu0_vid);
static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = dev_get_drvdata(dev); return sprintf(buf, "%d\n", data->vrm); }

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Julia Lawall12.38%133.33%
Total42100.00%3100.00%


static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct lm87_data *data = dev_get_drvdata(dev); unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; if (val > 255) return -EINVAL; data->vrm = val; return count; }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare6886.08%250.00%
Axel Lin1012.66%125.00%
Julia Lawall11.27%125.00%
Total79100.00%4100.00%

static DEVICE_ATTR_RW(vrm);
static ssize_t aout_output_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare4497.78%266.67%
Julia Lawall12.22%133.33%
Total45100.00%3100.00%


static ssize_t aout_output_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->aout = AOUT_TO_REG(val); lm87_write_value(client, LM87_REG_AOUT, data->aout); mutex_unlock(&data->update_lock); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare10698.15%133.33%
Jason Gunthorpe10.93%133.33%
Julia Lawall10.93%133.33%
Total108100.00%3100.00%

static DEVICE_ATTR_RW(aout_output);
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, char *buf) { struct lm87_data *data = lm87_update_device(dev); int bitnr = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare58100.00%1100.00%
Total58100.00%1100.00%

static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7); static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5); static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14); static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); /* * Real code */ static struct attribute *lm87_attributes[] = { &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_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, &sensor_dev_attr_in3_input.dev_attr.attr, &sensor_dev_attr_in3_min.dev_attr.attr, &sensor_dev_attr_in3_max.dev_attr.attr, &sensor_dev_attr_in3_alarm.dev_attr.attr, &sensor_dev_attr_in4_input.dev_attr.attr, &sensor_dev_attr_in4_min.dev_attr.attr, &sensor_dev_attr_in4_max.dev_attr.attr, &sensor_dev_attr_in4_alarm.dev_attr.attr, &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, &dev_attr_temp1_crit.attr, &sensor_dev_attr_temp1_alarm.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp2_min.dev_attr.attr, &dev_attr_temp2_crit.attr, &sensor_dev_attr_temp2_alarm.dev_attr.attr, &sensor_dev_attr_temp2_fault.dev_attr.attr, &dev_attr_alarms.attr, &dev_attr_aout_output.attr, NULL }; static const struct attribute_group lm87_group = { .attrs = lm87_attributes, }; static struct attribute *lm87_attributes_in6[] = { &sensor_dev_attr_in6_input.dev_attr.attr, &sensor_dev_attr_in6_min.dev_attr.attr, &sensor_dev_attr_in6_max.dev_attr.attr, &sensor_dev_attr_in6_alarm.dev_attr.attr, NULL }; static const struct attribute_group lm87_group_in6 = { .attrs = lm87_attributes_in6, }; static struct attribute *lm87_attributes_fan1[] = { &sensor_dev_attr_fan1_input.dev_attr.attr, &sensor_dev_attr_fan1_min.dev_attr.attr, &sensor_dev_attr_fan1_div.dev_attr.attr, &sensor_dev_attr_fan1_alarm.dev_attr.attr, NULL }; static const struct attribute_group lm87_group_fan1 = { .attrs = lm87_attributes_fan1, }; static struct attribute *lm87_attributes_in7[] = { &sensor_dev_attr_in7_input.dev_attr.attr, &sensor_dev_attr_in7_min.dev_attr.attr, &sensor_dev_attr_in7_max.dev_attr.attr, &sensor_dev_attr_in7_alarm.dev_attr.attr, NULL }; static const struct attribute_group lm87_group_in7 = { .attrs = lm87_attributes_in7, }; static struct attribute *lm87_attributes_fan2[] = { &sensor_dev_attr_fan2_input.dev_attr.attr, &sensor_dev_attr_fan2_min.dev_attr.attr, &sensor_dev_attr_fan2_div.dev_attr.attr, &sensor_dev_attr_fan2_alarm.dev_attr.attr, NULL }; static const struct attribute_group lm87_group_fan2 = { .attrs = lm87_attributes_fan2, }; static struct attribute *lm87_attributes_temp3[] = { &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, &sensor_dev_attr_temp3_min.dev_attr.attr, &dev_attr_temp3_crit.attr, &sensor_dev_attr_temp3_alarm.dev_attr.attr, &sensor_dev_attr_temp3_fault.dev_attr.attr, NULL }; static const struct attribute_group lm87_group_temp3 = { .attrs = lm87_attributes_temp3, }; static struct attribute *lm87_attributes_in0_5[] = { &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_in5_input.dev_attr.attr, &sensor_dev_attr_in5_min.dev_attr.attr, &sensor_dev_attr_in5_max.dev_attr.attr, &sensor_dev_attr_in5_alarm.dev_attr.attr, NULL }; static const struct attribute_group lm87_group_in0_5 = { .attrs = lm87_attributes_in0_5, }; static struct attribute *lm87_attributes_vid[] = { &dev_attr_cpu0_vid.attr, &dev_attr_vrm.attr, NULL }; static const struct attribute_group lm87_group_vid = { .attrs = lm87_attributes_vid, }; /* Return 0 if detection is successful, -ENODEV otherwise */
static int lm87_detect(struct i2c_client *client, struct i2c_board_info *info) { struct i2c_adapter *adapter = client->adapter; const char *name; u8 cid, rev; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; if (lm87_read_value(client, LM87_REG_CONFIG) & 0x80) return -ENODEV; /* Now, we do the remaining detection. */ cid = lm87_read_value(client, LM87_REG_COMPANY_ID); rev = lm87_read_value(client, LM87_REG_REVISION); if (cid == 0x02 /* National Semiconductor */ && (rev >= 0x01 && rev <= 0x08)) name = "lm87"; else if (cid == 0x41 /* Analog Devices */ && (rev & 0xf0) == 0x10) name = "adm1024"; else { dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n", client->addr); return -ENODEV; } strlcpy(info->type, name, I2C_NAME_SIZE); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare13081.76%583.33%
Mark M. Hoffman2918.24%116.67%
Total159100.00%6100.00%


static void lm87_restore_config(void *arg) { struct i2c_client *client = arg; struct lm87_data *data = i2c_get_clientdata(client); lm87_write_value(client, LM87_REG_CONFIG, data->config); }

Contributors

PersonTokensPropCommitsCommitProp
Jason Gunthorpe1950.00%125.00%
Guenter Roeck1026.32%125.00%
Jean Delvare923.68%250.00%
Total38100.00%4100.00%


static int lm87_init_client(struct i2c_client *client) { struct lm87_data *data = i2c_get_clientdata(client); int rc; struct device_node *of_node = client->dev.of_node; u8 val = 0; struct regulator *vcc = NULL; if (of_node) { if (of_property_read_bool(of_node, "has-temp3")) val |= CHAN_TEMP3; if (of_property_read_bool(of_node, "has-in6")) val |= CHAN_NO_FAN(0); if (of_property_read_bool(of_node, "has-in7")) val |= CHAN_NO_FAN(1); vcc = devm_regulator_get_optional(&client->dev, "vcc"); if (!IS_ERR(vcc)) { if (regulator_get_voltage(vcc) == 5000000) val |= CHAN_VCC_5V; } data->channel = val; lm87_write_value(client, LM87_REG_CHANNEL_MODE, data->channel); } else if (dev_get_platdata(&client->dev)) { data->channel = *(u8 *)dev_get_platdata(&client->dev); lm87_write_value(client, LM87_REG_CHANNEL_MODE, data->channel); } else { data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); } data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F; rc = devm_add_action(&client->dev, lm87_restore_config, client); if (rc) return rc; if (!(data->config & 0x01)) { int i; /* Limits are left uninitialized after power-up */ for (i = 1; i < 6; i++) { lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); } for (i = 0; i < 2; i++) { lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); } if (data->channel & CHAN_TEMP3) { lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); } else { lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); } } /* Make sure Start is set and INT#_Clear is clear */ if ((data->config & 0x09) != 0x01) lm87_write_value(client, LM87_REG_CONFIG, (data->config & 0x77) | 0x01); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare24053.10%337.50%
Mahoda Ratnayaka12728.10%112.50%
Guenter Roeck367.96%112.50%
Jason Gunthorpe286.19%112.50%
Mark M. Hoffman132.88%112.50%
Jingoo Han81.77%112.50%
Total452100.00%8100.00%


static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct lm87_data *data; struct device *hwmon_dev; int err; unsigned int group_tail = 0; data = devm_kzalloc(&client->dev, sizeof(struct lm87_data), GFP_KERNEL); if (!data) return -ENOMEM; i2c_set_clientdata(client, data); mutex_init(&data->update_lock); /* Initialize the LM87 chip */ err = lm87_init_client(client); if (err) return err; data->in_scale[0] = 2500; data->in_scale[1] = 2700; data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; data->in_scale[3] = 5000; data->in_scale[4] = 12000; data->in_scale[5] = 2700; data->in_scale[6] = 1875; data->in_scale[7] = 1875; /* * Construct the list of attributes, the list depends on the * configuration of the chip */ data->attr_groups[group_tail++] = &lm87_group; if (data->channel & CHAN_NO_FAN(0)) data->attr_groups[group_tail++] = &lm87_group_in6; else data->attr_groups[group_tail++] = &lm87_group_fan1; if (data->channel & CHAN_NO_FAN(1)) data->attr_groups[group_tail++] = &lm87_group_in7; else data->attr_groups[group_tail++] = &lm87_group_fan2; if (data->channel & CHAN_TEMP3) data->attr_groups[group_tail++] = &lm87_group_temp3; else data->attr_groups[group_tail++] = &lm87_group_in0_5; if (!(data->channel & CHAN_NO_VID)) { data->vrm = vid_which_vrm(); data->attr_groups[group_tail++] = &lm87_group_vid; } hwmon_dev = devm_hwmon_device_register_with_groups( &client->dev, client->name, client, data->attr_groups); return PTR_ERR_OR_ZERO(hwmon_dev); }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare21462.39%436.36%
Jason Gunthorpe8424.49%19.09%
Guenter Roeck319.04%218.18%
Ben Hutchings72.04%218.18%
Mark M. Hoffman61.75%19.09%
Tony Jones10.29%19.09%
Total343100.00%11100.00%

/* * Driver data (common to all clients) */ static const struct i2c_device_id lm87_id[] = { { "lm87", 0 }, { "adm1024", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, lm87_id); static const struct of_device_id lm87_of_match[] = { { .compatible = "ti,lm87" }, { .compatible = "adi,adm1024" }, { }, }; MODULE_DEVICE_TABLE(of, lm87_of_match); static struct i2c_driver lm87_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "lm87", .of_match_table = lm87_of_match, }, .probe = lm87_probe, .id_table = lm87_id, .detect = lm87_detect, .address_list = normal_i2c, }; module_i2c_driver(lm87_driver); MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de> and others"); MODULE_DESCRIPTION("LM87 driver"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare411079.65%1235.29%
Guenter Roeck3697.15%411.76%
Mark M. Hoffman2905.62%38.82%
Jason Gunthorpe1482.87%12.94%
Mahoda Ratnayaka1302.52%12.94%
Javier Martinez Canillas390.76%25.88%
Julia Lawall150.29%12.94%
Ingo Molnar130.25%12.94%
Ben Hutchings110.21%25.88%
Axel Lin110.21%25.88%
Yani Ioannou100.19%12.94%
Jingoo Han80.16%12.94%
Alexey Dobriyan30.06%12.94%
Greg Kroah-Hartman20.04%12.94%
Tony Jones10.02%12.94%
Total5160100.00%34100.00%
Directory: drivers/hwmon
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