mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
7d6ed4ba4f
This driver doesn't use the id information provided by the old i2c
probe function, so it can trivially be converted to the simple
("probe_new") form.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Acked-by: Corentin LABBE <clabbe.montjoie@gmail.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Link: https://lore.kernel.org/r/20200813161129.1507599-1-steve@sk2.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
402 lines
10 KiB
C
402 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring
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*
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* Copyright (C) 2006 Corentin LABBE <clabbe.montjoie@gmail.com>
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*
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* Based on LM83 Driver by Jean Delvare <jdelvare@suse.de>
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*
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* Give only processor, motherboard temperatures and fan tachs
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* Very rare chip please let me know if you use it
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*
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* http://www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/hwmon.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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/*
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* Addresses to scan
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*/
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static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
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0x2e, 0x2f, I2C_CLIENT_END
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};
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/*
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* The ADM1029 registers
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* Manufacturer ID is 0x41 for Analog Devices
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*/
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#define ADM1029_REG_MAN_ID 0x0D
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#define ADM1029_REG_CHIP_ID 0x0E
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#define ADM1029_REG_CONFIG 0x01
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#define ADM1029_REG_NB_FAN_SUPPORT 0x02
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#define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06
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#define ADM1029_REG_LOCAL_TEMP 0xA0
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#define ADM1029_REG_REMOTE1_TEMP 0xA1
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#define ADM1029_REG_REMOTE2_TEMP 0xA2
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#define ADM1029_REG_LOCAL_TEMP_HIGH 0x90
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#define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91
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#define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92
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#define ADM1029_REG_LOCAL_TEMP_LOW 0x98
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#define ADM1029_REG_REMOTE1_TEMP_LOW 0x99
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#define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A
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#define ADM1029_REG_FAN1 0x70
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#define ADM1029_REG_FAN2 0x71
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#define ADM1029_REG_FAN1_MIN 0x78
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#define ADM1029_REG_FAN2_MIN 0x79
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#define ADM1029_REG_FAN1_CONFIG 0x68
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#define ADM1029_REG_FAN2_CONFIG 0x69
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#define TEMP_FROM_REG(val) ((val) * 1000)
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#define DIV_FROM_REG(val) (1 << (((val) >> 6) - 1))
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/* Registers to be checked by adm1029_update_device() */
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static const u8 ADM1029_REG_TEMP[] = {
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ADM1029_REG_LOCAL_TEMP,
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ADM1029_REG_REMOTE1_TEMP,
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ADM1029_REG_REMOTE2_TEMP,
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ADM1029_REG_LOCAL_TEMP_HIGH,
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ADM1029_REG_REMOTE1_TEMP_HIGH,
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ADM1029_REG_REMOTE2_TEMP_HIGH,
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ADM1029_REG_LOCAL_TEMP_LOW,
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ADM1029_REG_REMOTE1_TEMP_LOW,
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ADM1029_REG_REMOTE2_TEMP_LOW,
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};
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static const u8 ADM1029_REG_FAN[] = {
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ADM1029_REG_FAN1,
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ADM1029_REG_FAN2,
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ADM1029_REG_FAN1_MIN,
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ADM1029_REG_FAN2_MIN,
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};
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static const u8 ADM1029_REG_FAN_DIV[] = {
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ADM1029_REG_FAN1_CONFIG,
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ADM1029_REG_FAN2_CONFIG,
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};
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/*
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* Client data (each client gets its own)
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*/
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struct adm1029_data {
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struct i2c_client *client;
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struct mutex update_lock; /* protect register access */
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char valid; /* zero until following fields are valid */
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unsigned long last_updated; /* in jiffies */
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/* registers values, signed for temperature, unsigned for other stuff */
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s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)];
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u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)];
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u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)];
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};
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/*
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* function that update the status of the chips (temperature for example)
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*/
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static struct adm1029_data *adm1029_update_device(struct device *dev)
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{
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struct adm1029_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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mutex_lock(&data->update_lock);
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/*
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* Use the "cache" Luke, don't recheck values
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* if there are already checked not a long time later
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*/
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if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
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int nr;
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dev_dbg(&client->dev, "Updating adm1029 data\n");
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for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) {
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data->temp[nr] =
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i2c_smbus_read_byte_data(client,
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ADM1029_REG_TEMP[nr]);
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}
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for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) {
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data->fan[nr] =
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i2c_smbus_read_byte_data(client,
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ADM1029_REG_FAN[nr]);
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}
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for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) {
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data->fan_div[nr] =
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i2c_smbus_read_byte_data(client,
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ADM1029_REG_FAN_DIV[nr]);
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}
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data->last_updated = jiffies;
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data->valid = 1;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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/*
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* Sysfs stuff
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*/
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static ssize_t
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temp_show(struct device *dev, struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm1029_data *data = adm1029_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
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}
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static ssize_t
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fan_show(struct device *dev, struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm1029_data *data = adm1029_update_device(dev);
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u16 val;
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if (data->fan[attr->index] == 0 ||
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(data->fan_div[attr->index] & 0xC0) == 0 ||
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data->fan[attr->index] == 255) {
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return sprintf(buf, "0\n");
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}
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val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index])
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/ data->fan[attr->index];
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return sprintf(buf, "%d\n", val);
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}
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static ssize_t
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fan_div_show(struct device *dev, struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm1029_data *data = adm1029_update_device(dev);
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if ((data->fan_div[attr->index] & 0xC0) == 0)
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return sprintf(buf, "0\n");
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return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
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}
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static ssize_t fan_div_store(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct adm1029_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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u8 reg;
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long val;
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int ret = kstrtol(buf, 10, &val);
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if (ret < 0)
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return ret;
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mutex_lock(&data->update_lock);
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/*Read actual config */
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reg = i2c_smbus_read_byte_data(client,
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ADM1029_REG_FAN_DIV[attr->index]);
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switch (val) {
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case 1:
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val = 1;
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break;
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case 2:
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val = 2;
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break;
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case 4:
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val = 3;
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break;
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default:
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mutex_unlock(&data->update_lock);
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dev_err(&client->dev,
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"fan_div value %ld not supported. Choose one of 1, 2 or 4!\n",
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val);
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return -EINVAL;
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}
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/* Update the value */
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reg = (reg & 0x3F) | (val << 6);
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/* Update the cache */
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data->fan_div[attr->index] = reg;
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/* Write value */
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i2c_smbus_write_byte_data(client,
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ADM1029_REG_FAN_DIV[attr->index], reg);
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mutex_unlock(&data->update_lock);
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return count;
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}
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/* Access rights on sysfs. */
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static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
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static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
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static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
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static SENSOR_DEVICE_ATTR_RO(temp1_max, temp, 3);
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static SENSOR_DEVICE_ATTR_RO(temp2_max, temp, 4);
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static SENSOR_DEVICE_ATTR_RO(temp3_max, temp, 5);
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static SENSOR_DEVICE_ATTR_RO(temp1_min, temp, 6);
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static SENSOR_DEVICE_ATTR_RO(temp2_min, temp, 7);
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static SENSOR_DEVICE_ATTR_RO(temp3_min, temp, 8);
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static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
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static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
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static SENSOR_DEVICE_ATTR_RO(fan1_min, fan, 2);
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static SENSOR_DEVICE_ATTR_RO(fan2_min, fan, 3);
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static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
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static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
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static struct attribute *adm1029_attrs[] = {
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&sensor_dev_attr_temp1_input.dev_attr.attr,
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&sensor_dev_attr_temp1_min.dev_attr.attr,
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&sensor_dev_attr_temp1_max.dev_attr.attr,
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&sensor_dev_attr_temp2_input.dev_attr.attr,
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&sensor_dev_attr_temp2_min.dev_attr.attr,
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&sensor_dev_attr_temp2_max.dev_attr.attr,
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&sensor_dev_attr_temp3_input.dev_attr.attr,
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&sensor_dev_attr_temp3_min.dev_attr.attr,
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&sensor_dev_attr_temp3_max.dev_attr.attr,
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&sensor_dev_attr_fan1_input.dev_attr.attr,
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&sensor_dev_attr_fan2_input.dev_attr.attr,
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&sensor_dev_attr_fan1_min.dev_attr.attr,
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&sensor_dev_attr_fan2_min.dev_attr.attr,
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&sensor_dev_attr_fan1_div.dev_attr.attr,
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&sensor_dev_attr_fan2_div.dev_attr.attr,
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NULL
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};
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ATTRIBUTE_GROUPS(adm1029);
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/*
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* Real code
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*/
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/* Return 0 if detection is successful, -ENODEV otherwise */
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static int adm1029_detect(struct i2c_client *client,
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struct i2c_board_info *info)
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{
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struct i2c_adapter *adapter = client->adapter;
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u8 man_id, chip_id, temp_devices_installed, nb_fan_support;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -ENODEV;
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/*
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* ADM1029 doesn't have CHIP ID, check just MAN ID
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* For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED,
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* ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values
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* documented
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*/
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man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID);
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chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID);
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temp_devices_installed = i2c_smbus_read_byte_data(client,
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ADM1029_REG_TEMP_DEVICES_INSTALLED);
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nb_fan_support = i2c_smbus_read_byte_data(client,
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ADM1029_REG_NB_FAN_SUPPORT);
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/* 0x41 is Analog Devices */
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if (man_id != 0x41 || (temp_devices_installed & 0xf9) != 0x01 ||
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nb_fan_support != 0x03)
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return -ENODEV;
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if ((chip_id & 0xF0) != 0x00) {
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/*
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* There are no "official" CHIP ID, so actually
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* we use Major/Minor revision for that
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*/
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pr_info("Unknown major revision %x, please let us know\n",
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chip_id);
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return -ENODEV;
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}
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strlcpy(info->type, "adm1029", I2C_NAME_SIZE);
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return 0;
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}
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static int adm1029_init_client(struct i2c_client *client)
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{
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u8 config;
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config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
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if ((config & 0x10) == 0) {
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i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
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config | 0x10);
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}
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/* recheck config */
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config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
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if ((config & 0x10) == 0) {
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dev_err(&client->dev, "Initialization failed!\n");
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return 0;
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}
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return 1;
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}
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static int adm1029_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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struct adm1029_data *data;
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struct device *hwmon_dev;
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data = devm_kzalloc(dev, sizeof(struct adm1029_data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->client = client;
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mutex_init(&data->update_lock);
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/*
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* Initialize the ADM1029 chip
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* Check config register
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*/
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if (adm1029_init_client(client) == 0)
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return -ENODEV;
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hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
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data,
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adm1029_groups);
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return PTR_ERR_OR_ZERO(hwmon_dev);
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}
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static const struct i2c_device_id adm1029_id[] = {
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{ "adm1029", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adm1029_id);
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static struct i2c_driver adm1029_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = "adm1029",
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},
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.probe_new = adm1029_probe,
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.id_table = adm1029_id,
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.detect = adm1029_detect,
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.address_list = normal_i2c,
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};
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module_i2c_driver(adm1029_driver);
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MODULE_AUTHOR("Corentin LABBE <clabbe.montjoie@gmail.com>");
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MODULE_DESCRIPTION("adm1029 driver");
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MODULE_LICENSE("GPL v2");
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