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![Wolfram Sang](/assets/img/avatar_default.png)
Follow the advice of the below link and prefer 'strscpy' in this subsystem. Conversion is 1:1 because the return value is not used. Generated by a coccinelle script. Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/ Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20220818210014.6769-1-wsa+renesas@sang-engineering.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
572 lines
17 KiB
C
572 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* adm1025.c
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*
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* Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com>
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* Copyright (C) 2003-2009 Jean Delvare <jdelvare@suse.de>
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*
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* The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
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* voltages (including its own power source) and up to two temperatures
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* (its own plus up to one external one). Voltages are scaled internally
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* (which is not the common way) with ratios such that the nominal value
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* of each voltage correspond to a register value of 192 (which means a
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* resolution of about 0.5% of the nominal value). Temperature values are
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* reported with a 1 deg resolution and a 3 deg accuracy. Complete
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* datasheet can be obtained from Analog's website at:
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* https://www.onsemi.com/PowerSolutions/product.do?id=ADM1025
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*
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* This driver also supports the ADM1025A, which differs from the ADM1025
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* only in that it has "open-drain VID inputs while the ADM1025 has
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* on-chip 100k pull-ups on the VID inputs". It doesn't make any
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* difference for us.
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*
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* This driver also supports the NE1619, a sensor chip made by Philips.
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* That chip is similar to the ADM1025A, with a few differences. The only
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* difference that matters to us is that the NE1619 has only two possible
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* addresses while the ADM1025A has a third one. Complete datasheet can be
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* obtained from Philips's website at:
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* http://www.semiconductors.philips.com/pip/NE1619DS.html
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*
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* Since the ADM1025 was the first chipset supported by this driver, most
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* comments will refer to this chipset, but are actually general and
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* concern all supported chipsets, unless mentioned otherwise.
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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.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/hwmon-vid.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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* ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e.
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* NE1619 has two possible addresses: 0x2c and 0x2d.
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*/
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
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enum chips { adm1025, ne1619 };
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/*
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* The ADM1025 registers
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*/
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#define ADM1025_REG_MAN_ID 0x3E
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#define ADM1025_REG_CHIP_ID 0x3F
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#define ADM1025_REG_CONFIG 0x40
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#define ADM1025_REG_STATUS1 0x41
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#define ADM1025_REG_STATUS2 0x42
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#define ADM1025_REG_IN(nr) (0x20 + (nr))
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#define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2)
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#define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2)
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#define ADM1025_REG_TEMP(nr) (0x26 + (nr))
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#define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2)
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#define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2)
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#define ADM1025_REG_VID 0x47
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#define ADM1025_REG_VID4 0x49
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/*
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* Conversions and various macros
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* The ADM1025 uses signed 8-bit values for temperatures.
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*/
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static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
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#define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192)
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#define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \
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(val) >= (scale) * 255 / 192 ? 255 : \
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((val) * 192 + (scale) / 2) / (scale))
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#define TEMP_FROM_REG(reg) ((reg) * 1000)
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#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
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(val) >= 126500 ? 127 : \
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(((val) < 0 ? (val) - 500 : \
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(val) + 500) / 1000))
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/*
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* Client data (each client gets its own)
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*/
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struct adm1025_data {
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struct i2c_client *client;
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const struct attribute_group *groups[3];
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struct mutex update_lock;
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bool valid; /* false until following fields are valid */
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unsigned long last_updated; /* in jiffies */
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u8 in[6]; /* register value */
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u8 in_max[6]; /* register value */
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u8 in_min[6]; /* register value */
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s8 temp[2]; /* register value */
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s8 temp_min[2]; /* register value */
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s8 temp_max[2]; /* register value */
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u16 alarms; /* register values, combined */
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u8 vid; /* register values, combined */
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u8 vrm;
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};
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static struct adm1025_data *adm1025_update_device(struct device *dev)
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{
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struct adm1025_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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if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
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int i;
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dev_dbg(&client->dev, "Updating data.\n");
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for (i = 0; i < 6; i++) {
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data->in[i] = i2c_smbus_read_byte_data(client,
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ADM1025_REG_IN(i));
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data->in_min[i] = i2c_smbus_read_byte_data(client,
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ADM1025_REG_IN_MIN(i));
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data->in_max[i] = i2c_smbus_read_byte_data(client,
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ADM1025_REG_IN_MAX(i));
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}
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for (i = 0; i < 2; i++) {
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data->temp[i] = i2c_smbus_read_byte_data(client,
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ADM1025_REG_TEMP(i));
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data->temp_min[i] = i2c_smbus_read_byte_data(client,
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ADM1025_REG_TEMP_LOW(i));
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data->temp_max[i] = i2c_smbus_read_byte_data(client,
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ADM1025_REG_TEMP_HIGH(i));
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}
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data->alarms = i2c_smbus_read_byte_data(client,
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ADM1025_REG_STATUS1)
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| (i2c_smbus_read_byte_data(client,
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ADM1025_REG_STATUS2) << 8);
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data->vid = (i2c_smbus_read_byte_data(client,
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ADM1025_REG_VID) & 0x0f)
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| ((i2c_smbus_read_byte_data(client,
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ADM1025_REG_VID4) & 0x01) << 4);
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data->last_updated = jiffies;
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data->valid = true;
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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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in_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = adm1025_update_device(dev);
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return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index],
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in_scale[index]));
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}
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static ssize_t
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in_min_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = adm1025_update_device(dev);
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return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index],
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in_scale[index]));
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}
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static ssize_t
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in_max_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = adm1025_update_device(dev);
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return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index],
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in_scale[index]));
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}
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static ssize_t
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temp_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = adm1025_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index]));
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}
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static ssize_t
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temp_min_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = adm1025_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index]));
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}
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static ssize_t
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temp_max_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = adm1025_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
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}
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static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->in_min[index] = IN_TO_REG(val, in_scale[index]);
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i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index),
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data->in_min[index]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->in_max[index] = IN_TO_REG(val, in_scale[index]);
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i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index),
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data->in_max[index]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
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static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
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static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
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static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
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static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
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static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
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static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
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static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
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static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
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static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
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static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
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static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
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static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
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static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
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static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
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static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5);
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static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5);
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static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5);
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static ssize_t temp_min_store(struct device *dev,
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struct device_attribute *attr, const char *buf,
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size_t count)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->temp_min[index] = TEMP_TO_REG(val);
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i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index),
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data->temp_min[index]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t temp_max_store(struct device *dev,
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struct device_attribute *attr, const char *buf,
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size_t count)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->temp_max[index] = TEMP_TO_REG(val);
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i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index),
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data->temp_max[index]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
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static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
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static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
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static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
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static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
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static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
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static ssize_t
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alarms_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct adm1025_data *data = adm1025_update_device(dev);
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return sprintf(buf, "%u\n", data->alarms);
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}
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static DEVICE_ATTR_RO(alarms);
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static ssize_t
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alarm_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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int bitnr = to_sensor_dev_attr(attr)->index;
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struct adm1025_data *data = adm1025_update_device(dev);
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return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
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}
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static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
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static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
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static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
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static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
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static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
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static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9);
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static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 5);
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static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 4);
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static SENSOR_DEVICE_ATTR_RO(temp1_fault, alarm, 14);
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static ssize_t
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cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct adm1025_data *data = adm1025_update_device(dev);
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return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
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}
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static DEVICE_ATTR_RO(cpu0_vid);
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static ssize_t
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vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct adm1025_data *data = dev_get_drvdata(dev);
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return sprintf(buf, "%u\n", data->vrm);
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}
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static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct adm1025_data *data = dev_get_drvdata(dev);
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unsigned long val;
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int err;
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err = kstrtoul(buf, 10, &val);
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if (err)
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return err;
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if (val > 255)
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return -EINVAL;
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data->vrm = val;
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return count;
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}
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static DEVICE_ATTR_RW(vrm);
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/*
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* Real code
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*/
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static struct attribute *adm1025_attributes[] = {
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&sensor_dev_attr_in0_input.dev_attr.attr,
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&sensor_dev_attr_in1_input.dev_attr.attr,
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&sensor_dev_attr_in2_input.dev_attr.attr,
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&sensor_dev_attr_in3_input.dev_attr.attr,
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&sensor_dev_attr_in5_input.dev_attr.attr,
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&sensor_dev_attr_in0_min.dev_attr.attr,
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&sensor_dev_attr_in1_min.dev_attr.attr,
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&sensor_dev_attr_in2_min.dev_attr.attr,
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&sensor_dev_attr_in3_min.dev_attr.attr,
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&sensor_dev_attr_in5_min.dev_attr.attr,
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&sensor_dev_attr_in0_max.dev_attr.attr,
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&sensor_dev_attr_in1_max.dev_attr.attr,
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&sensor_dev_attr_in2_max.dev_attr.attr,
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&sensor_dev_attr_in3_max.dev_attr.attr,
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&sensor_dev_attr_in5_max.dev_attr.attr,
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&sensor_dev_attr_in0_alarm.dev_attr.attr,
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&sensor_dev_attr_in1_alarm.dev_attr.attr,
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&sensor_dev_attr_in2_alarm.dev_attr.attr,
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&sensor_dev_attr_in3_alarm.dev_attr.attr,
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&sensor_dev_attr_in5_alarm.dev_attr.attr,
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&sensor_dev_attr_temp1_input.dev_attr.attr,
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&sensor_dev_attr_temp2_input.dev_attr.attr,
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&sensor_dev_attr_temp1_min.dev_attr.attr,
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&sensor_dev_attr_temp2_min.dev_attr.attr,
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&sensor_dev_attr_temp1_max.dev_attr.attr,
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&sensor_dev_attr_temp2_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_fault.dev_attr.attr,
|
|
&dev_attr_alarms.attr,
|
|
&dev_attr_cpu0_vid.attr,
|
|
&dev_attr_vrm.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group adm1025_group = {
|
|
.attrs = adm1025_attributes,
|
|
};
|
|
|
|
static struct attribute *adm1025_attributes_in4[] = {
|
|
&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,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group adm1025_group_in4 = {
|
|
.attrs = adm1025_attributes_in4,
|
|
};
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int adm1025_detect(struct i2c_client *client,
|
|
struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
const char *name;
|
|
u8 man_id, chip_id;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* Check for unused bits */
|
|
if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80)
|
|
|| (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0)
|
|
|| (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) {
|
|
dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n",
|
|
client->addr);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Identification */
|
|
chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
|
|
if ((chip_id & 0xF0) != 0x20)
|
|
return -ENODEV;
|
|
|
|
man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
|
|
if (man_id == 0x41)
|
|
name = "adm1025";
|
|
else if (man_id == 0xA1 && client->addr != 0x2E)
|
|
name = "ne1619";
|
|
else
|
|
return -ENODEV;
|
|
|
|
strscpy(info->type, name, I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void adm1025_init_client(struct i2c_client *client)
|
|
{
|
|
u8 reg;
|
|
struct adm1025_data *data = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
data->vrm = vid_which_vrm();
|
|
|
|
/*
|
|
* Set high limits
|
|
* Usually we avoid setting limits on driver init, but it happens
|
|
* that the ADM1025 comes with stupid default limits (all registers
|
|
* set to 0). In case the chip has not gone through any limit
|
|
* setting yet, we better set the high limits to the max so that
|
|
* no alarm triggers.
|
|
*/
|
|
for (i = 0; i < 6; i++) {
|
|
reg = i2c_smbus_read_byte_data(client,
|
|
ADM1025_REG_IN_MAX(i));
|
|
if (reg == 0)
|
|
i2c_smbus_write_byte_data(client,
|
|
ADM1025_REG_IN_MAX(i),
|
|
0xFF);
|
|
}
|
|
for (i = 0; i < 2; i++) {
|
|
reg = i2c_smbus_read_byte_data(client,
|
|
ADM1025_REG_TEMP_HIGH(i));
|
|
if (reg == 0)
|
|
i2c_smbus_write_byte_data(client,
|
|
ADM1025_REG_TEMP_HIGH(i),
|
|
0x7F);
|
|
}
|
|
|
|
/*
|
|
* Start the conversions
|
|
*/
|
|
reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
|
|
if (!(reg & 0x01))
|
|
i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
|
|
(reg&0x7E)|0x01);
|
|
}
|
|
|
|
static int adm1025_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct device *hwmon_dev;
|
|
struct adm1025_data *data;
|
|
u8 config;
|
|
|
|
data = devm_kzalloc(dev, sizeof(struct adm1025_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, data);
|
|
data->client = client;
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Initialize the ADM1025 chip */
|
|
adm1025_init_client(client);
|
|
|
|
/* sysfs hooks */
|
|
data->groups[0] = &adm1025_group;
|
|
/* Pin 11 is either in4 (+12V) or VID4 */
|
|
config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
|
|
if (!(config & 0x20))
|
|
data->groups[1] = &adm1025_group_in4;
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
|
|
data, data->groups);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static const struct i2c_device_id adm1025_id[] = {
|
|
{ "adm1025", adm1025 },
|
|
{ "ne1619", ne1619 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, adm1025_id);
|
|
|
|
static struct i2c_driver adm1025_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "adm1025",
|
|
},
|
|
.probe_new = adm1025_probe,
|
|
.id_table = adm1025_id,
|
|
.detect = adm1025_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(adm1025_driver);
|
|
|
|
MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
|
|
MODULE_DESCRIPTION("ADM1025 driver");
|
|
MODULE_LICENSE("GPL");
|