^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) * max1619.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) 2003-2004 Oleksij Rempel <bug-track@fisher-privat.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Jean Delvare <jdelvare@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Based on the lm90 driver. The MAX1619 is a sensor chip made by Maxim.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * It reports up to two temperatures (its own plus up to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * one external one). Complete datasheet can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * obtained from Maxim's website at:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * http://pdfserv.maxim-ic.com/en/ds/MAX1619.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static const unsigned short normal_i2c[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * The MAX1619 registers
^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) #define MAX1619_REG_R_MAN_ID 0xFE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define MAX1619_REG_R_CHIP_ID 0xFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define MAX1619_REG_R_CONFIG 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define MAX1619_REG_W_CONFIG 0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define MAX1619_REG_R_CONVRATE 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define MAX1619_REG_W_CONVRATE 0x0A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define MAX1619_REG_R_STATUS 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define MAX1619_REG_R_LOCAL_TEMP 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define MAX1619_REG_R_REMOTE_TEMP 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define MAX1619_REG_R_REMOTE_HIGH 0x07
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define MAX1619_REG_W_REMOTE_HIGH 0x0D
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define MAX1619_REG_R_REMOTE_LOW 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define MAX1619_REG_W_REMOTE_LOW 0x0E
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define MAX1619_REG_R_REMOTE_CRIT 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define MAX1619_REG_W_REMOTE_CRIT 0x12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define MAX1619_REG_R_TCRIT_HYST 0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define MAX1619_REG_W_TCRIT_HYST 0x13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Conversions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int temp_from_reg(int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return (val & 0x80 ? val-0x100 : val) * 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int temp_to_reg(int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return (val < 0 ? val+0x100*1000 : val) / 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) enum temp_index {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) t_input1 = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) t_input2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) t_low2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) t_high2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) t_crit2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) t_hyst2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) t_num_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * Client data (each client gets its own)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct max1619_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct mutex update_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) char valid; /* zero until following fields are valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) unsigned long last_updated; /* in jiffies */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* registers values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) u8 temp[t_num_regs]; /* index with enum temp_index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) u8 alarms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static const u8 regs_read[t_num_regs] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) [t_input1] = MAX1619_REG_R_LOCAL_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) [t_input2] = MAX1619_REG_R_REMOTE_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) [t_low2] = MAX1619_REG_R_REMOTE_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) [t_high2] = MAX1619_REG_R_REMOTE_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) [t_crit2] = MAX1619_REG_R_REMOTE_CRIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) [t_hyst2] = MAX1619_REG_R_TCRIT_HYST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static const u8 regs_write[t_num_regs] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) [t_low2] = MAX1619_REG_W_REMOTE_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) [t_high2] = MAX1619_REG_W_REMOTE_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) [t_crit2] = MAX1619_REG_W_REMOTE_CRIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) [t_hyst2] = MAX1619_REG_W_TCRIT_HYST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static struct max1619_data *max1619_update_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct max1619_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int config, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) dev_dbg(&client->dev, "Updating max1619 data.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) for (i = 0; i < t_num_regs; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) data->temp[i] = i2c_smbus_read_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) regs_read[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) data->alarms = i2c_smbus_read_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) MAX1619_REG_R_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* If OVERT polarity is low, reverse alarm bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (!(config & 0x20))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) data->alarms ^= 0x02;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) data->last_updated = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) data->valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * Sysfs stuff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct max1619_data *data = max1619_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
^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) static ssize_t temp_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct device_attribute *devattr, const char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct max1619_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) int err = kstrtol(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) data->temp[attr->index] = temp_to_reg(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) i2c_smbus_write_byte_data(client, regs_write[attr->index],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) data->temp[attr->index]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) struct max1619_data *data = max1619_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) return sprintf(buf, "%d\n", data->alarms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) int bitnr = to_sensor_dev_attr(attr)->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct max1619_data *data = max1619_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
^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 SENSOR_DEVICE_ATTR_RO(temp1_input, temp, t_input1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, t_input2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static SENSOR_DEVICE_ATTR_RW(temp2_min, temp, t_low2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static SENSOR_DEVICE_ATTR_RW(temp2_max, temp, t_high2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp, t_crit2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static SENSOR_DEVICE_ATTR_RW(temp2_crit_hyst, temp, t_hyst2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static DEVICE_ATTR_RO(alarms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, alarm, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static struct attribute *max1619_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) &sensor_dev_attr_temp1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) &sensor_dev_attr_temp2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) &sensor_dev_attr_temp2_min.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) &sensor_dev_attr_temp2_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) &sensor_dev_attr_temp2_crit.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) &dev_attr_alarms.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) &sensor_dev_attr_temp2_fault.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) ATTRIBUTE_GROUPS(max1619);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* Return 0 if detection is successful, -ENODEV otherwise */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static int max1619_detect(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct i2c_board_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct i2c_adapter *adapter = client->adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) u8 reg_config, reg_convrate, reg_status, man_id, chip_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /* detection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) reg_config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) reg_convrate = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONVRATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) reg_status = i2c_smbus_read_byte_data(client, MAX1619_REG_R_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if ((reg_config & 0x03) != 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) || reg_convrate > 0x07 || (reg_status & 0x61) != 0x00) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) dev_dbg(&adapter->dev, "MAX1619 detection failed at 0x%02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) client->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) /* identification */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) man_id = i2c_smbus_read_byte_data(client, MAX1619_REG_R_MAN_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) chip_id = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CHIP_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (man_id != 0x4D || chip_id != 0x04) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) dev_info(&adapter->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) "Unsupported chip (man_id=0x%02X, chip_id=0x%02X).\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) man_id, chip_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) strlcpy(info->type, "max1619", I2C_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return 0;
^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 void max1619_init_client(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) u8 config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) * Start the conversions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONVRATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 5); /* 2 Hz */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (config & 0x40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONFIG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) config & 0xBF); /* run */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) static int max1619_probe(struct i2c_client *new_client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct max1619_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) data = devm_kzalloc(&new_client->dev, sizeof(struct max1619_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) data->client = new_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) mutex_init(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) /* Initialize the MAX1619 chip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) max1619_init_client(new_client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) hwmon_dev = devm_hwmon_device_register_with_groups(&new_client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) new_client->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) max1619_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return PTR_ERR_OR_ZERO(hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static const struct i2c_device_id max1619_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) { "max1619", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) MODULE_DEVICE_TABLE(i2c, max1619_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) static const struct of_device_id max1619_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) { .compatible = "maxim,max1619", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) MODULE_DEVICE_TABLE(of, max1619_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) static struct i2c_driver max1619_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) .class = I2C_CLASS_HWMON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) .name = "max1619",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) .of_match_table = of_match_ptr(max1619_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) .probe_new = max1619_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) .id_table = max1619_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) .detect = max1619_detect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) .address_list = normal_i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) module_i2c_driver(max1619_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) MODULE_AUTHOR("Oleksij Rempel <bug-track@fisher-privat.net>, Jean Delvare <jdelvare@suse.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) MODULE_DESCRIPTION("MAX1619 sensor driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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