798 lines
23 KiB
C
798 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net>
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*
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* based on max1668.c
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* Copyright (c) 2011 David George <david.george@ska.ac.za>
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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/err.h>
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#include <linux/mutex.h>
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#include <linux/of_device.h>
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#include <linux/of.h>
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#include <linux/platform_data/max6697.h>
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enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694,
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max6697, max6698, max6699 };
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/* Report local sensor as temp1 */
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static const u8 MAX6697_REG_TEMP[] = {
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0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 };
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static const u8 MAX6697_REG_TEMP_EXT[] = {
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0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 };
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static const u8 MAX6697_REG_MAX[] = {
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0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 };
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static const u8 MAX6697_REG_CRIT[] = {
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 };
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/*
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* Map device tree / platform data register bit map to chip bit map.
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* Applies to alert register and over-temperature register.
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*/
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#define MAX6697_ALERT_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \
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(((reg) & 0x01) << 6) | ((reg) & 0x80))
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#define MAX6697_OVERT_MAP_BITS(reg) (((reg) >> 1) | (((reg) & 0x01) << 7))
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#define MAX6697_REG_STAT(n) (0x44 + (n))
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#define MAX6697_REG_CONFIG 0x41
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#define MAX6581_CONF_EXTENDED (1 << 1)
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#define MAX6693_CONF_BETA (1 << 2)
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#define MAX6697_CONF_RESISTANCE (1 << 3)
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#define MAX6697_CONF_TIMEOUT (1 << 5)
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#define MAX6697_REG_ALERT_MASK 0x42
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#define MAX6697_REG_OVERT_MASK 0x43
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#define MAX6581_REG_RESISTANCE 0x4a
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#define MAX6581_REG_IDEALITY 0x4b
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#define MAX6581_REG_IDEALITY_SELECT 0x4c
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#define MAX6581_REG_OFFSET 0x4d
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#define MAX6581_REG_OFFSET_SELECT 0x4e
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#define MAX6581_OFFSET_MIN -31750
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#define MAX6581_OFFSET_MAX 31750
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#define MAX6697_CONV_TIME 156 /* ms per channel, worst case */
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struct max6697_chip_data {
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int channels;
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u32 have_ext;
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u32 have_crit;
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u32 have_fault;
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u8 valid_conf;
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const u8 *alarm_map;
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};
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struct max6697_data {
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struct i2c_client *client;
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enum chips type;
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const struct max6697_chip_data *chip;
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int update_interval; /* in milli-seconds */
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int temp_offset; /* in degrees C */
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struct mutex update_lock;
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unsigned long last_updated; /* In jiffies */
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bool valid; /* true if following fields are valid */
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/* 1x local and up to 7x remote */
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u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */
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#define MAX6697_TEMP_INPUT 0
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#define MAX6697_TEMP_EXT 1
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#define MAX6697_TEMP_MAX 2
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#define MAX6697_TEMP_CRIT 3
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u32 alarms;
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};
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/* Diode fault status bits on MAX6581 are right shifted by one bit */
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static const u8 max6581_alarm_map[] = {
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0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23 };
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static const struct max6697_chip_data max6697_chip_data[] = {
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[max6581] = {
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.channels = 8,
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.have_crit = 0xff,
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.have_ext = 0x7f,
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.have_fault = 0xfe,
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.valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT,
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.alarm_map = max6581_alarm_map,
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},
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[max6602] = {
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.channels = 5,
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.have_crit = 0x12,
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.have_ext = 0x02,
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.have_fault = 0x1e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6622] = {
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.channels = 5,
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.have_crit = 0x12,
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.have_ext = 0x02,
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.have_fault = 0x1e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6636] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x7e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6689] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x7e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6693] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x7e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
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MAX6697_CONF_TIMEOUT,
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},
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[max6694] = {
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.channels = 5,
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.have_crit = 0x12,
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.have_ext = 0x02,
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.have_fault = 0x1e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
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MAX6697_CONF_TIMEOUT,
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},
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[max6697] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x7e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6698] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x0e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6699] = {
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.channels = 5,
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.have_crit = 0x12,
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.have_ext = 0x02,
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.have_fault = 0x1e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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};
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static inline int max6581_offset_to_millic(int val)
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{
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return sign_extend32(val, 7) * 250;
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}
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static struct max6697_data *max6697_update_device(struct device *dev)
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{
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struct max6697_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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struct max6697_data *ret = data;
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int val;
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int i;
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u32 alarms;
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mutex_lock(&data->update_lock);
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if (data->valid &&
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!time_after(jiffies, data->last_updated
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+ msecs_to_jiffies(data->update_interval)))
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goto abort;
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for (i = 0; i < data->chip->channels; i++) {
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if (data->chip->have_ext & (1 << i)) {
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val = i2c_smbus_read_byte_data(client,
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MAX6697_REG_TEMP_EXT[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp[i][MAX6697_TEMP_EXT] = val;
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}
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val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp[i][MAX6697_TEMP_INPUT] = val;
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val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp[i][MAX6697_TEMP_MAX] = val;
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if (data->chip->have_crit & (1 << i)) {
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val = i2c_smbus_read_byte_data(client,
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MAX6697_REG_CRIT[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp[i][MAX6697_TEMP_CRIT] = val;
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}
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}
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alarms = 0;
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for (i = 0; i < 3; i++) {
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val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i));
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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alarms = (alarms << 8) | val;
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}
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data->alarms = alarms;
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data->last_updated = jiffies;
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data->valid = true;
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abort:
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mutex_unlock(&data->update_lock);
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return ret;
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}
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static ssize_t temp_input_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct max6697_data *data = max6697_update_device(dev);
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int temp;
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if (IS_ERR(data))
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return PTR_ERR(data);
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temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3;
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temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5;
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return sprintf(buf, "%d\n", temp * 125);
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}
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static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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int index = to_sensor_dev_attr_2(devattr)->index;
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struct max6697_data *data = max6697_update_device(dev);
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int temp;
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if (IS_ERR(data))
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return PTR_ERR(data);
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temp = data->temp[nr][index];
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temp -= data->temp_offset;
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return sprintf(buf, "%d\n", temp * 1000);
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}
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static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct max6697_data *data = max6697_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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if (data->chip->alarm_map)
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index = data->chip->alarm_map[index];
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return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1);
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}
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static ssize_t temp_store(struct device *dev,
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struct device_attribute *devattr, const char *buf,
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size_t count)
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{
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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int index = to_sensor_dev_attr_2(devattr)->index;
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struct max6697_data *data = dev_get_drvdata(dev);
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long temp;
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int ret;
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ret = kstrtol(buf, 10, &temp);
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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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temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset;
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temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127);
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data->temp[nr][index] = temp;
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ret = i2c_smbus_write_byte_data(data->client,
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index == 2 ? MAX6697_REG_MAX[nr]
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: MAX6697_REG_CRIT[nr],
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temp);
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mutex_unlock(&data->update_lock);
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return ret < 0 ? ret : count;
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}
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static ssize_t offset_store(struct device *dev, struct device_attribute *devattr, const char *buf,
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size_t count)
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{
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int val, ret, index, select;
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struct max6697_data *data;
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bool channel_enabled;
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long temp;
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index = to_sensor_dev_attr(devattr)->index;
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data = dev_get_drvdata(dev);
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ret = kstrtol(buf, 10, &temp);
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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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select = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET_SELECT);
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if (select < 0) {
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ret = select;
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goto abort;
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}
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channel_enabled = (select & (1 << (index - 1)));
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temp = clamp_val(temp, MAX6581_OFFSET_MIN, MAX6581_OFFSET_MAX);
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val = DIV_ROUND_CLOSEST(temp, 250);
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/* disable the offset for channel if the new offset is 0 */
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if (val == 0) {
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if (channel_enabled)
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ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET_SELECT,
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select & ~(1 << (index - 1)));
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ret = ret < 0 ? ret : count;
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goto abort;
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}
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if (!channel_enabled) {
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ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET_SELECT,
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select | (1 << (index - 1)));
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if (ret < 0)
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goto abort;
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}
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ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET, val);
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ret = ret < 0 ? ret : count;
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abort:
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mutex_unlock(&data->update_lock);
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return ret;
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}
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static ssize_t offset_show(struct device *dev, struct device_attribute *devattr, char *buf)
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{
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struct max6697_data *data;
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int select, ret, index;
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index = to_sensor_dev_attr(devattr)->index;
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data = dev_get_drvdata(dev);
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mutex_lock(&data->update_lock);
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select = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET_SELECT);
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if (select < 0)
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ret = select;
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else if (select & (1 << (index - 1)))
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ret = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET);
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else
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ret = 0;
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mutex_unlock(&data->update_lock);
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return ret < 0 ? ret : sprintf(buf, "%d\n", max6581_offset_to_millic(ret));
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}
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static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
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static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0, MAX6697_TEMP_MAX);
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static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0, MAX6697_TEMP_CRIT);
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static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
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static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 1, MAX6697_TEMP_MAX);
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static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 1, MAX6697_TEMP_CRIT);
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static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2);
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static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, MAX6697_TEMP_MAX);
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static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 2, MAX6697_TEMP_CRIT);
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static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3);
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static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 3, MAX6697_TEMP_MAX);
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static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 3, MAX6697_TEMP_CRIT);
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static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4);
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static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 4, MAX6697_TEMP_MAX);
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static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 4, MAX6697_TEMP_CRIT);
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static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5);
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static SENSOR_DEVICE_ATTR_2_RW(temp6_max, temp, 5, MAX6697_TEMP_MAX);
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static SENSOR_DEVICE_ATTR_2_RW(temp6_crit, temp, 5, MAX6697_TEMP_CRIT);
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static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_input, 6);
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static SENSOR_DEVICE_ATTR_2_RW(temp7_max, temp, 6, MAX6697_TEMP_MAX);
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static SENSOR_DEVICE_ATTR_2_RW(temp7_crit, temp, 6, MAX6697_TEMP_CRIT);
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static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_input, 7);
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static SENSOR_DEVICE_ATTR_2_RW(temp8_max, temp, 7, MAX6697_TEMP_MAX);
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static SENSOR_DEVICE_ATTR_2_RW(temp8_crit, temp, 7, MAX6697_TEMP_CRIT);
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static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 22);
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static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 16);
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static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 17);
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static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 18);
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static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, 19);
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static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, alarm, 20);
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static SENSOR_DEVICE_ATTR_RO(temp7_max_alarm, alarm, 21);
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static SENSOR_DEVICE_ATTR_RO(temp8_max_alarm, alarm, 23);
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static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14);
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static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8);
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static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 9);
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static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 10);
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static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, alarm, 11);
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static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, alarm, 12);
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static SENSOR_DEVICE_ATTR_RO(temp7_crit_alarm, alarm, 13);
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static SENSOR_DEVICE_ATTR_RO(temp8_crit_alarm, alarm, 15);
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static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 1);
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static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2);
|
|
static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 3);
|
|
static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, 4);
|
|
static SENSOR_DEVICE_ATTR_RO(temp6_fault, alarm, 5);
|
|
static SENSOR_DEVICE_ATTR_RO(temp7_fault, alarm, 6);
|
|
static SENSOR_DEVICE_ATTR_RO(temp8_fault, alarm, 7);
|
|
|
|
/* There is no offset for local temperature so starting from temp2 */
|
|
static SENSOR_DEVICE_ATTR_RW(temp2_offset, offset, 1);
|
|
static SENSOR_DEVICE_ATTR_RW(temp3_offset, offset, 2);
|
|
static SENSOR_DEVICE_ATTR_RW(temp4_offset, offset, 3);
|
|
static SENSOR_DEVICE_ATTR_RW(temp5_offset, offset, 4);
|
|
static SENSOR_DEVICE_ATTR_RW(temp6_offset, offset, 5);
|
|
static SENSOR_DEVICE_ATTR_RW(temp7_offset, offset, 6);
|
|
static SENSOR_DEVICE_ATTR_RW(temp8_offset, offset, 7);
|
|
|
|
static DEVICE_ATTR(dummy, 0, NULL, NULL);
|
|
|
|
static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr,
|
|
int index)
|
|
{
|
|
struct device *dev = kobj_to_dev(kobj);
|
|
struct max6697_data *data = dev_get_drvdata(dev);
|
|
const struct max6697_chip_data *chip = data->chip;
|
|
int channel = index / 7; /* channel number */
|
|
int nr = index % 7; /* attribute index within channel */
|
|
|
|
if (channel >= chip->channels)
|
|
return 0;
|
|
|
|
if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel)))
|
|
return 0;
|
|
if (nr == 5 && !(chip->have_fault & (1 << channel)))
|
|
return 0;
|
|
/* offset reg is only supported on max6581 remote channels */
|
|
if (nr == 6)
|
|
if (data->type != max6581 || channel == 0)
|
|
return 0;
|
|
|
|
return attr->mode;
|
|
}
|
|
|
|
/*
|
|
* max6697_is_visible uses the index into the following array to determine
|
|
* if attributes should be created or not. Any change in order or content
|
|
* must be matched in max6697_is_visible.
|
|
*/
|
|
static struct attribute *max6697_attributes[] = {
|
|
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
|
|
&dev_attr_dummy.attr,
|
|
&dev_attr_dummy.attr,
|
|
|
|
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_offset.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp3_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_offset.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp4_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp4_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp4_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp4_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp4_offset.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp5_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp5_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp5_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp5_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp5_offset.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp6_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp6_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp6_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp6_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp6_offset.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp7_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp7_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp7_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp7_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp7_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp7_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp7_offset.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp8_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp8_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp8_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp8_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp8_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp8_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp8_offset.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group max6697_group = {
|
|
.attrs = max6697_attributes, .is_visible = max6697_is_visible,
|
|
};
|
|
__ATTRIBUTE_GROUPS(max6697);
|
|
|
|
static void max6697_get_config_of(struct device_node *node,
|
|
struct max6697_platform_data *pdata)
|
|
{
|
|
int len;
|
|
const __be32 *prop;
|
|
|
|
pdata->smbus_timeout_disable =
|
|
of_property_read_bool(node, "smbus-timeout-disable");
|
|
pdata->extended_range_enable =
|
|
of_property_read_bool(node, "extended-range-enable");
|
|
pdata->beta_compensation =
|
|
of_property_read_bool(node, "beta-compensation-enable");
|
|
|
|
prop = of_get_property(node, "alert-mask", &len);
|
|
if (prop && len == sizeof(u32))
|
|
pdata->alert_mask = be32_to_cpu(prop[0]);
|
|
prop = of_get_property(node, "over-temperature-mask", &len);
|
|
if (prop && len == sizeof(u32))
|
|
pdata->over_temperature_mask = be32_to_cpu(prop[0]);
|
|
prop = of_get_property(node, "resistance-cancellation", &len);
|
|
if (prop) {
|
|
if (len == sizeof(u32))
|
|
pdata->resistance_cancellation = be32_to_cpu(prop[0]);
|
|
else
|
|
pdata->resistance_cancellation = 0xfe;
|
|
}
|
|
prop = of_get_property(node, "transistor-ideality", &len);
|
|
if (prop && len == 2 * sizeof(u32)) {
|
|
pdata->ideality_mask = be32_to_cpu(prop[0]);
|
|
pdata->ideality_value = be32_to_cpu(prop[1]);
|
|
}
|
|
}
|
|
|
|
static int max6697_init_chip(struct max6697_data *data,
|
|
struct i2c_client *client)
|
|
{
|
|
struct max6697_platform_data *pdata = dev_get_platdata(&client->dev);
|
|
struct max6697_platform_data p;
|
|
const struct max6697_chip_data *chip = data->chip;
|
|
int factor = chip->channels;
|
|
int ret, reg;
|
|
|
|
/*
|
|
* Don't touch configuration if neither platform data nor OF
|
|
* configuration was specified. If that is the case, use the
|
|
* current chip configuration.
|
|
*/
|
|
if (!pdata && !client->dev.of_node) {
|
|
reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG);
|
|
if (reg < 0)
|
|
return reg;
|
|
if (data->type == max6581) {
|
|
if (reg & MAX6581_CONF_EXTENDED)
|
|
data->temp_offset = 64;
|
|
reg = i2c_smbus_read_byte_data(client,
|
|
MAX6581_REG_RESISTANCE);
|
|
if (reg < 0)
|
|
return reg;
|
|
factor += hweight8(reg);
|
|
} else {
|
|
if (reg & MAX6697_CONF_RESISTANCE)
|
|
factor++;
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
if (client->dev.of_node) {
|
|
memset(&p, 0, sizeof(p));
|
|
max6697_get_config_of(client->dev.of_node, &p);
|
|
pdata = &p;
|
|
}
|
|
|
|
reg = 0;
|
|
if (pdata->smbus_timeout_disable &&
|
|
(chip->valid_conf & MAX6697_CONF_TIMEOUT)) {
|
|
reg |= MAX6697_CONF_TIMEOUT;
|
|
}
|
|
if (pdata->extended_range_enable &&
|
|
(chip->valid_conf & MAX6581_CONF_EXTENDED)) {
|
|
reg |= MAX6581_CONF_EXTENDED;
|
|
data->temp_offset = 64;
|
|
}
|
|
if (pdata->resistance_cancellation &&
|
|
(chip->valid_conf & MAX6697_CONF_RESISTANCE)) {
|
|
reg |= MAX6697_CONF_RESISTANCE;
|
|
factor++;
|
|
}
|
|
if (pdata->beta_compensation &&
|
|
(chip->valid_conf & MAX6693_CONF_BETA)) {
|
|
reg |= MAX6693_CONF_BETA;
|
|
}
|
|
|
|
ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK,
|
|
MAX6697_ALERT_MAP_BITS(pdata->alert_mask));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK,
|
|
MAX6697_OVERT_MAP_BITS(pdata->over_temperature_mask));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (data->type == max6581) {
|
|
factor += hweight8(pdata->resistance_cancellation >> 1);
|
|
ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE,
|
|
pdata->resistance_cancellation >> 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY,
|
|
pdata->ideality_value);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
MAX6581_REG_IDEALITY_SELECT,
|
|
pdata->ideality_mask >> 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
done:
|
|
data->update_interval = factor * MAX6697_CONV_TIME;
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id max6697_id[];
|
|
|
|
static int max6697_probe(struct i2c_client *client)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
struct device *dev = &client->dev;
|
|
struct max6697_data *data;
|
|
struct device *hwmon_dev;
|
|
int err;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
if (client->dev.of_node)
|
|
data->type = (enum chips)of_device_get_match_data(&client->dev);
|
|
else
|
|
data->type = i2c_match_id(max6697_id, client)->driver_data;
|
|
data->chip = &max6697_chip_data[data->type];
|
|
data->client = client;
|
|
mutex_init(&data->update_lock);
|
|
|
|
err = max6697_init_chip(data, client);
|
|
if (err)
|
|
return err;
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
|
|
data,
|
|
max6697_groups);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static const struct i2c_device_id max6697_id[] = {
|
|
{ "max6581", max6581 },
|
|
{ "max6602", max6602 },
|
|
{ "max6622", max6622 },
|
|
{ "max6636", max6636 },
|
|
{ "max6689", max6689 },
|
|
{ "max6693", max6693 },
|
|
{ "max6694", max6694 },
|
|
{ "max6697", max6697 },
|
|
{ "max6698", max6698 },
|
|
{ "max6699", max6699 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, max6697_id);
|
|
|
|
static const struct of_device_id __maybe_unused max6697_of_match[] = {
|
|
{
|
|
.compatible = "maxim,max6581",
|
|
.data = (void *)max6581
|
|
},
|
|
{
|
|
.compatible = "maxim,max6602",
|
|
.data = (void *)max6602
|
|
},
|
|
{
|
|
.compatible = "maxim,max6622",
|
|
.data = (void *)max6622
|
|
},
|
|
{
|
|
.compatible = "maxim,max6636",
|
|
.data = (void *)max6636
|
|
},
|
|
{
|
|
.compatible = "maxim,max6689",
|
|
.data = (void *)max6689
|
|
},
|
|
{
|
|
.compatible = "maxim,max6693",
|
|
.data = (void *)max6693
|
|
},
|
|
{
|
|
.compatible = "maxim,max6694",
|
|
.data = (void *)max6694
|
|
},
|
|
{
|
|
.compatible = "maxim,max6697",
|
|
.data = (void *)max6697
|
|
},
|
|
{
|
|
.compatible = "maxim,max6698",
|
|
.data = (void *)max6698
|
|
},
|
|
{
|
|
.compatible = "maxim,max6699",
|
|
.data = (void *)max6699
|
|
},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, max6697_of_match);
|
|
|
|
static struct i2c_driver max6697_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "max6697",
|
|
.of_match_table = of_match_ptr(max6697_of_match),
|
|
},
|
|
.probe_new = max6697_probe,
|
|
.id_table = max6697_id,
|
|
};
|
|
|
|
module_i2c_driver(max6697_driver);
|
|
|
|
MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
|
|
MODULE_DESCRIPTION("MAX6697 temperature sensor driver");
|
|
MODULE_LICENSE("GPL");
|