^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * lm83.c - Part of lm_sensors, Linux kernel modules for hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * monitoring
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2003-2009 Jean Delvare <jdelvare@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * a sensor chip made by National Semiconductor. It reports up to four
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * temperatures (its own plus up to three external ones) with a 1 deg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * resolution and a 3-4 deg accuracy. Complete datasheet can be obtained
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * from National's website at:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * http://www.national.com/pf/LM/LM83.html
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Since the datasheet omits to give the chip stepping code, I give it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * here: 0x03 (at register 0xff).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Also supports the LM82 temp sensor, which is basically a stripped down
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * model of the LM83. Datasheet is here:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * http://www.national.com/pf/LM/LM82.html
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Addresses to scan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * Address is selected using 2 three-level pins, resulting in 9 possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static const unsigned short normal_i2c[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) enum chips { lm83, lm82 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * The LM83 registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * Manufacturer ID is 0x01 for National Semiconductor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define LM83_REG_R_MAN_ID 0xFE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define LM83_REG_R_CHIP_ID 0xFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define LM83_REG_R_CONFIG 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define LM83_REG_W_CONFIG 0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define LM83_REG_R_STATUS1 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define LM83_REG_R_STATUS2 0x35
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define LM83_REG_R_LOCAL_TEMP 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define LM83_REG_R_LOCAL_HIGH 0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define LM83_REG_W_LOCAL_HIGH 0x0B
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define LM83_REG_R_REMOTE1_TEMP 0x30
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define LM83_REG_R_REMOTE1_HIGH 0x38
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define LM83_REG_W_REMOTE1_HIGH 0x50
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define LM83_REG_R_REMOTE2_TEMP 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define LM83_REG_R_REMOTE2_HIGH 0x07
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define LM83_REG_W_REMOTE2_HIGH 0x0D
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define LM83_REG_R_REMOTE3_TEMP 0x31
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define LM83_REG_R_REMOTE3_HIGH 0x3A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define LM83_REG_W_REMOTE3_HIGH 0x52
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define LM83_REG_R_TCRIT 0x42
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define LM83_REG_W_TCRIT 0x5A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * Conversions and various macros
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * The LM83 uses signed 8-bit values with LSB = 1 degree Celsius.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define TEMP_FROM_REG(val) ((val) * 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define TEMP_TO_REG(val) ((val) <= -128000 ? -128 : \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) (val) >= 127000 ? 127 : \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) (val) < 0 ? ((val) - 500) / 1000 : \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ((val) + 500) / 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static const u8 LM83_REG_R_TEMP[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) LM83_REG_R_LOCAL_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) LM83_REG_R_REMOTE1_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) LM83_REG_R_REMOTE2_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) LM83_REG_R_REMOTE3_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) LM83_REG_R_LOCAL_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) LM83_REG_R_REMOTE1_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) LM83_REG_R_REMOTE2_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) LM83_REG_R_REMOTE3_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) LM83_REG_R_TCRIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static const u8 LM83_REG_W_HIGH[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) LM83_REG_W_LOCAL_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) LM83_REG_W_REMOTE1_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) LM83_REG_W_REMOTE2_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) LM83_REG_W_REMOTE3_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) LM83_REG_W_TCRIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * Client data (each client gets its own)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct lm83_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) const struct attribute_group *groups[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct mutex update_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) char valid; /* zero until following fields are valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) unsigned long last_updated; /* in jiffies */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) /* registers values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) s8 temp[9]; /* 0..3: input 1-4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 4..7: high limit 1-4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 8 : critical limit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) u16 alarms; /* bitvector, combined */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static struct lm83_data *lm83_update_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct lm83_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) int nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) dev_dbg(&client->dev, "Updating lm83 data.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) for (nr = 0; nr < 9; nr++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) data->temp[nr] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) i2c_smbus_read_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) LM83_REG_R_TEMP[nr]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) data->alarms =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) + (i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) data->last_updated = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) data->valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * Sysfs stuff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct lm83_data *data = lm83_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static ssize_t temp_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct device_attribute *devattr, const char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) struct lm83_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) int nr = attr->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) err = kstrtol(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) data->temp[nr] = TEMP_TO_REG(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) i2c_smbus_write_byte_data(client, LM83_REG_W_HIGH[nr - 4],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) data->temp[nr]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct lm83_data *data = lm83_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return sprintf(buf, "%d\n", data->alarms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static ssize_t alarm_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct device_attribute *devattr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct lm83_data *data = lm83_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) int bitnr = attr->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static SENSOR_DEVICE_ATTR_RW(temp2_max, temp, 5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static SENSOR_DEVICE_ATTR_RW(temp3_max, temp, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static SENSOR_DEVICE_ATTR_RW(temp4_max, temp, 7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static SENSOR_DEVICE_ATTR_RW(temp3_crit, temp, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static SENSOR_DEVICE_ATTR_RO(temp4_crit, temp, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* Individual alarm files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 13);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 15);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /* Raw alarm file for compatibility */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) static DEVICE_ATTR_RO(alarms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) static struct attribute *lm83_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) &sensor_dev_attr_temp1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) &sensor_dev_attr_temp3_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) &sensor_dev_attr_temp1_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) &sensor_dev_attr_temp3_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) &sensor_dev_attr_temp1_crit.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) &sensor_dev_attr_temp3_crit.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) &sensor_dev_attr_temp3_fault.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) &dev_attr_alarms.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static const struct attribute_group lm83_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) .attrs = lm83_attributes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static struct attribute *lm83_attributes_opt[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) &sensor_dev_attr_temp2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) &sensor_dev_attr_temp4_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) &sensor_dev_attr_temp2_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) &sensor_dev_attr_temp4_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) &sensor_dev_attr_temp2_crit.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) &sensor_dev_attr_temp4_crit.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) &sensor_dev_attr_temp4_fault.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) &sensor_dev_attr_temp2_fault.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) static const struct attribute_group lm83_group_opt = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) .attrs = lm83_attributes_opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * Real code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) /* Return 0 if detection is successful, -ENODEV otherwise */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static int lm83_detect(struct i2c_client *new_client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) struct i2c_board_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) struct i2c_adapter *adapter = new_client->adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) u8 man_id, chip_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) /* Detection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1) & 0xA8) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) (i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2) & 0x48) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) (i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG) & 0x41)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) dev_dbg(&adapter->dev, "LM83 detection failed at 0x%02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) new_client->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) /* Identification */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) man_id = i2c_smbus_read_byte_data(new_client, LM83_REG_R_MAN_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (man_id != 0x01) /* National Semiconductor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) chip_id = i2c_smbus_read_byte_data(new_client, LM83_REG_R_CHIP_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) switch (chip_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) case 0x03:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) name = "lm83";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) case 0x01:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) name = "lm82";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* identification failed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) dev_info(&adapter->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) man_id, chip_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) strlcpy(info->type, name, I2C_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) static const struct i2c_device_id lm83_id[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static int lm83_probe(struct i2c_client *new_client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct lm83_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) data = devm_kzalloc(&new_client->dev, sizeof(struct lm83_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) data->client = new_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) mutex_init(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * Register sysfs hooks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * The LM82 can only monitor one external diode which is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) * at the same register as the LM83 temp3 entry - so we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * declare 1 and 3 common, and then 2 and 4 only for the LM83.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) data->groups[0] = &lm83_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (i2c_match_id(lm83_id, new_client)->driver_data == lm83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) data->groups[1] = &lm83_group_opt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) hwmon_dev = devm_hwmon_device_register_with_groups(&new_client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) new_client->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) data, data->groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return PTR_ERR_OR_ZERO(hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * Driver data (common to all clients)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) static const struct i2c_device_id lm83_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) { "lm83", lm83 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) { "lm82", lm82 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) MODULE_DEVICE_TABLE(i2c, lm83_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) static struct i2c_driver lm83_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) .class = I2C_CLASS_HWMON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) .name = "lm83",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) .probe_new = lm83_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) .id_table = lm83_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) .detect = lm83_detect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) .address_list = normal_i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) module_i2c_driver(lm83_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) MODULE_DESCRIPTION("LM83 driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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