mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
596 lines
13 KiB
596 lines
13 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
|
|
#include <linux/bitfield.h> |
|
#include <linux/bits.h> |
|
#include <linux/err.h> |
|
#include <linux/hwmon.h> |
|
#include <linux/hwmon-sysfs.h> |
|
#include <linux/i2c.h> |
|
#include <linux/regmap.h> |
|
#include <linux/util_macros.h> |
|
|
|
#define REG_CR1 0x00 |
|
#define CR1_HYST BIT(5) |
|
#define CR1_DRV GENMASK(4, 3) |
|
#define CR1_TEMP_SRC GENMASK(1, 0) |
|
#define REG_CR2 0x01 |
|
#define CR2_STBY BIT(7) |
|
#define CR2_ALERTS BIT(6) |
|
#define CR2_DFC BIT(0) |
|
#define REG_CR3 0x02 |
|
#define REG_PWMR 0x50 |
|
#define REG_PWMV 0x51 |
|
#define REG_STATUS 0x5A |
|
#define STATUS_ALARM_CRIT(ch) BIT(2 + 2 * (ch)) |
|
#define STATUS_ALARM_MAX(ch) BIT(3 + 2 * (ch)) |
|
#define STATUS_RDFA BIT(6) |
|
|
|
#define REG_TACH(ch) (0x52 + (ch) * 2) |
|
#define REG_TEMP_INPUT(ch) (0x56 + (ch) * 2) |
|
#define REG_TEMP_MAX(ch) (0x06 + (ch) * 2) |
|
#define REG_TEMP_CRIT(ch) (0x0A + (ch) * 2) |
|
|
|
#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) |
|
#define TEMP11_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ |
|
127875), 125) * 32) |
|
|
|
#define LUT_SIZE 48 |
|
|
|
#define REG_LUT(index) (0x20 + (index)) |
|
|
|
struct max31760_state { |
|
struct regmap *regmap; |
|
|
|
struct lut_attribute { |
|
char name[24]; |
|
struct sensor_device_attribute sda; |
|
} lut[LUT_SIZE]; |
|
|
|
struct attribute *attrs[LUT_SIZE + 2]; |
|
struct attribute_group group; |
|
const struct attribute_group *groups[2]; |
|
}; |
|
|
|
static bool max31760_volatile_reg(struct device *dev, unsigned int reg) |
|
{ |
|
return reg > 0x50; |
|
} |
|
|
|
static const struct regmap_config regmap_config = { |
|
.reg_bits = 8, |
|
.val_bits = 8, |
|
.max_register = 0x5B, |
|
.cache_type = REGCACHE_RBTREE, |
|
.volatile_reg = max31760_volatile_reg, |
|
}; |
|
|
|
static const int max31760_pwm_freq[] = {33, 150, 1500, 25000}; |
|
|
|
static int tach_to_rpm(u16 tach) |
|
{ |
|
if (tach == 0) |
|
tach = 1; |
|
|
|
return 60 * 100000 / tach / 2; |
|
} |
|
|
|
static int max31760_read(struct device *dev, enum hwmon_sensor_types type, |
|
u32 attr, int channel, long *val) |
|
{ |
|
struct max31760_state *state = dev_get_drvdata(dev); |
|
unsigned int regval; |
|
unsigned int reg_temp; |
|
s16 temp; |
|
u8 reg[2]; |
|
int ret; |
|
|
|
switch (type) { |
|
case hwmon_temp: |
|
switch (attr) { |
|
case hwmon_temp_fault: |
|
ret = regmap_read(state->regmap, REG_STATUS, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
*val = FIELD_GET(STATUS_RDFA, regval); |
|
|
|
return 0; |
|
case hwmon_temp_max_alarm: |
|
ret = regmap_read(state->regmap, REG_STATUS, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
if (channel) |
|
*val = FIELD_GET(STATUS_ALARM_MAX(1), regval); |
|
else |
|
*val = FIELD_GET(STATUS_ALARM_MAX(0), regval); |
|
|
|
return 0; |
|
case hwmon_temp_crit_alarm: |
|
ret = regmap_read(state->regmap, REG_STATUS, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
if (channel) |
|
*val = FIELD_GET(STATUS_ALARM_CRIT(1), regval); |
|
else |
|
*val = FIELD_GET(STATUS_ALARM_CRIT(0), regval); |
|
|
|
return 0; |
|
case hwmon_temp_input: |
|
reg_temp = REG_TEMP_INPUT(channel); |
|
break; |
|
case hwmon_temp_max: |
|
reg_temp = REG_TEMP_MAX(channel); |
|
break; |
|
case hwmon_temp_crit: |
|
reg_temp = REG_TEMP_CRIT(channel); |
|
break; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
ret = regmap_bulk_read(state->regmap, reg_temp, reg, 2); |
|
if (ret) |
|
return ret; |
|
|
|
temp = (reg[0] << 8) | reg[1]; |
|
|
|
*val = TEMP11_FROM_REG(temp); |
|
|
|
return 0; |
|
case hwmon_fan: |
|
switch (attr) { |
|
case hwmon_fan_input: |
|
ret = regmap_bulk_read(state->regmap, REG_TACH(channel), reg, 2); |
|
if (ret) |
|
return ret; |
|
|
|
*val = tach_to_rpm(reg[0] * 256 + reg[1]); |
|
|
|
return 0; |
|
case hwmon_fan_fault: |
|
ret = regmap_read(state->regmap, REG_STATUS, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
if (channel) |
|
*val = FIELD_GET(BIT(1), regval); |
|
else |
|
*val = FIELD_GET(BIT(0), regval); |
|
|
|
return 0; |
|
case hwmon_fan_enable: |
|
ret = regmap_read(state->regmap, REG_CR3, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
if (channel) |
|
*val = FIELD_GET(BIT(1), regval); |
|
else |
|
*val = FIELD_GET(BIT(0), regval); |
|
|
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
case hwmon_pwm: |
|
switch (attr) { |
|
case hwmon_pwm_input: |
|
ret = regmap_read(state->regmap, REG_PWMV, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
*val = regval; |
|
|
|
return 0; |
|
case hwmon_pwm_freq: |
|
ret = regmap_read(state->regmap, REG_CR1, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
regval = FIELD_GET(CR1_DRV, regval); |
|
if (regval >= ARRAY_SIZE(max31760_pwm_freq)) |
|
return -EINVAL; |
|
|
|
*val = max31760_pwm_freq[regval]; |
|
|
|
return 0; |
|
case hwmon_pwm_enable: |
|
ret = regmap_read(state->regmap, REG_CR2, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
*val = 2 - FIELD_GET(CR2_DFC, regval); |
|
|
|
return 0; |
|
case hwmon_pwm_auto_channels_temp: |
|
ret = regmap_read(state->regmap, REG_CR1, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
switch (FIELD_GET(CR1_TEMP_SRC, regval)) { |
|
case 0: |
|
*val = 2; |
|
break; |
|
case 1: |
|
*val = 1; |
|
break; |
|
case 2: |
|
case 3: |
|
*val = 3; |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static int max31760_write(struct device *dev, enum hwmon_sensor_types type, |
|
u32 attr, int channel, long val) |
|
{ |
|
struct max31760_state *state = dev_get_drvdata(dev); |
|
unsigned int pwm_index; |
|
unsigned int reg_temp; |
|
int temp; |
|
u8 reg_val[2]; |
|
|
|
switch (type) { |
|
case hwmon_temp: |
|
switch (attr) { |
|
case hwmon_temp_max: |
|
reg_temp = REG_TEMP_MAX(channel); |
|
break; |
|
case hwmon_temp_crit: |
|
reg_temp = REG_TEMP_CRIT(channel); |
|
break; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
temp = TEMP11_TO_REG(val); |
|
reg_val[0] = temp >> 8; |
|
reg_val[1] = temp & 0xFF; |
|
|
|
return regmap_bulk_write(state->regmap, reg_temp, reg_val, 2); |
|
case hwmon_fan: |
|
switch (attr) { |
|
case hwmon_fan_enable: |
|
if (val == 0) |
|
return regmap_clear_bits(state->regmap, REG_CR3, BIT(channel)); |
|
|
|
if (val == 1) |
|
return regmap_set_bits(state->regmap, REG_CR3, BIT(channel)); |
|
|
|
return -EINVAL; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
case hwmon_pwm: |
|
switch (attr) { |
|
case hwmon_pwm_input: |
|
if (val < 0 || val > 255) |
|
return -EINVAL; |
|
|
|
return regmap_write(state->regmap, REG_PWMR, val); |
|
case hwmon_pwm_enable: |
|
if (val == 1) |
|
return regmap_set_bits(state->regmap, REG_CR2, CR2_DFC); |
|
|
|
if (val == 2) |
|
return regmap_clear_bits(state->regmap, REG_CR2, CR2_DFC); |
|
|
|
return -EINVAL; |
|
case hwmon_pwm_freq: |
|
pwm_index = find_closest(val, max31760_pwm_freq, |
|
ARRAY_SIZE(max31760_pwm_freq)); |
|
|
|
return regmap_update_bits(state->regmap, |
|
REG_CR1, CR1_DRV, |
|
FIELD_PREP(CR1_DRV, pwm_index)); |
|
case hwmon_pwm_auto_channels_temp: |
|
switch (val) { |
|
case 1: |
|
break; |
|
case 2: |
|
val = 0; |
|
break; |
|
case 3: |
|
val = 2; |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return regmap_update_bits(state->regmap, REG_CR1, CR1_TEMP_SRC, val); |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static const struct hwmon_channel_info *max31760_info[] = { |
|
HWMON_CHANNEL_INFO(chip, |
|
HWMON_C_REGISTER_TZ), |
|
HWMON_CHANNEL_INFO(fan, |
|
HWMON_F_INPUT | HWMON_F_FAULT | HWMON_F_ENABLE, |
|
HWMON_F_INPUT | HWMON_F_FAULT | HWMON_F_ENABLE), |
|
HWMON_CHANNEL_INFO(temp, |
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT | |
|
HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
|
HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_LABEL), |
|
HWMON_CHANNEL_INFO(pwm, |
|
HWMON_PWM_ENABLE | HWMON_PWM_FREQ | HWMON_PWM_INPUT | |
|
HWMON_PWM_AUTO_CHANNELS_TEMP), |
|
NULL |
|
}; |
|
|
|
static umode_t max31760_is_visible(const void *data, |
|
enum hwmon_sensor_types type, |
|
u32 attr, int channel) |
|
{ |
|
switch (type) { |
|
case hwmon_temp: |
|
switch (attr) { |
|
case hwmon_temp_input: |
|
case hwmon_temp_max_alarm: |
|
case hwmon_temp_crit_alarm: |
|
case hwmon_temp_fault: |
|
case hwmon_temp_label: |
|
return 0444; |
|
case hwmon_temp_max: |
|
case hwmon_temp_crit: |
|
return 0644; |
|
default: |
|
return 0; |
|
} |
|
case hwmon_fan: |
|
switch (attr) { |
|
case hwmon_fan_input: |
|
case hwmon_fan_fault: |
|
return 0444; |
|
case hwmon_fan_enable: |
|
return 0644; |
|
default: |
|
return 0; |
|
} |
|
case hwmon_pwm: |
|
switch (attr) { |
|
case hwmon_pwm_enable: |
|
case hwmon_pwm_input: |
|
case hwmon_pwm_freq: |
|
case hwmon_pwm_auto_channels_temp: |
|
return 0644; |
|
default: |
|
return 0; |
|
} |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
static int max31760_read_string(struct device *dev, |
|
enum hwmon_sensor_types type, |
|
u32 attr, int channel, const char **str) |
|
{ |
|
switch (type) { |
|
case hwmon_temp: |
|
if (attr != hwmon_temp_label) |
|
return -EOPNOTSUPP; |
|
|
|
*str = channel ? "local" : "remote"; |
|
|
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static const struct hwmon_ops max31760_hwmon_ops = { |
|
.is_visible = max31760_is_visible, |
|
.read = max31760_read, |
|
.write = max31760_write, |
|
.read_string = max31760_read_string |
|
}; |
|
|
|
static const struct hwmon_chip_info max31760_chip_info = { |
|
.ops = &max31760_hwmon_ops, |
|
.info = max31760_info, |
|
}; |
|
|
|
static ssize_t lut_show(struct device *dev, |
|
struct device_attribute *devattr, char *buf) |
|
{ |
|
struct sensor_device_attribute *sda = to_sensor_dev_attr(devattr); |
|
struct max31760_state *state = dev_get_drvdata(dev); |
|
int ret; |
|
unsigned int regval; |
|
|
|
ret = regmap_read(state->regmap, REG_LUT(sda->index), ®val); |
|
if (ret) |
|
return ret; |
|
|
|
return sysfs_emit(buf, "%d\n", regval); |
|
} |
|
|
|
static ssize_t lut_store(struct device *dev, |
|
struct device_attribute *devattr, |
|
const char *buf, size_t count) |
|
{ |
|
struct sensor_device_attribute *sda = to_sensor_dev_attr(devattr); |
|
struct max31760_state *state = dev_get_drvdata(dev); |
|
int ret; |
|
u8 pwm; |
|
|
|
ret = kstrtou8(buf, 10, &pwm); |
|
if (ret) |
|
return ret; |
|
|
|
ret = regmap_write(state->regmap, REG_LUT(sda->index), pwm); |
|
if (ret) |
|
return ret; |
|
|
|
return count; |
|
} |
|
|
|
static ssize_t pwm1_auto_point_temp_hyst_show(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct max31760_state *state = dev_get_drvdata(dev); |
|
unsigned int regval; |
|
int ret; |
|
|
|
ret = regmap_read(state->regmap, REG_CR1, ®val); |
|
if (ret) |
|
return ret; |
|
|
|
return sysfs_emit(buf, "%d\n", (1 + (int)FIELD_GET(CR1_HYST, regval)) * 2000); |
|
} |
|
|
|
static ssize_t pwm1_auto_point_temp_hyst_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, |
|
size_t count) |
|
{ |
|
struct max31760_state *state = dev_get_drvdata(dev); |
|
unsigned int hyst; |
|
int ret; |
|
|
|
ret = kstrtou32(buf, 10, &hyst); |
|
if (ret) |
|
return ret; |
|
|
|
if (hyst < 3000) |
|
ret = regmap_clear_bits(state->regmap, REG_CR1, CR1_HYST); |
|
else |
|
ret = regmap_set_bits(state->regmap, REG_CR1, CR1_HYST); |
|
|
|
if (ret) |
|
return ret; |
|
|
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR_RW(pwm1_auto_point_temp_hyst); |
|
|
|
static void max31760_create_lut_nodes(struct max31760_state *state) |
|
{ |
|
int i; |
|
struct sensor_device_attribute *sda; |
|
struct lut_attribute *lut; |
|
|
|
for (i = 0; i < LUT_SIZE; ++i) { |
|
lut = &state->lut[i]; |
|
sda = &lut->sda; |
|
|
|
snprintf(lut->name, sizeof(lut->name), |
|
"pwm1_auto_point%d_pwm", i + 1); |
|
|
|
sda->dev_attr.attr.mode = 0644; |
|
sda->index = i; |
|
sda->dev_attr.show = lut_show; |
|
sda->dev_attr.store = lut_store; |
|
sda->dev_attr.attr.name = lut->name; |
|
|
|
sysfs_attr_init(&sda->dev_attr.attr); |
|
|
|
state->attrs[i] = &sda->dev_attr.attr; |
|
} |
|
|
|
state->attrs[i] = &dev_attr_pwm1_auto_point_temp_hyst.attr; |
|
|
|
state->group.attrs = state->attrs; |
|
state->groups[0] = &state->group; |
|
} |
|
|
|
static int max31760_probe(struct i2c_client *client) |
|
{ |
|
struct device *dev = &client->dev; |
|
struct max31760_state *state; |
|
struct device *hwmon_dev; |
|
int ret; |
|
|
|
state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); |
|
if (!state) |
|
return -ENOMEM; |
|
|
|
state->regmap = devm_regmap_init_i2c(client, ®map_config); |
|
if (IS_ERR(state->regmap)) |
|
return dev_err_probe(dev, |
|
PTR_ERR(state->regmap), |
|
"regmap initialization failed\n"); |
|
|
|
dev_set_drvdata(dev, state); |
|
|
|
/* Set alert output to comparator mode */ |
|
ret = regmap_set_bits(state->regmap, REG_CR2, CR2_ALERTS); |
|
if (ret) |
|
return dev_err_probe(dev, ret, "cannot write register\n"); |
|
|
|
max31760_create_lut_nodes(state); |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, |
|
state, |
|
&max31760_chip_info, |
|
state->groups); |
|
|
|
return PTR_ERR_OR_ZERO(hwmon_dev); |
|
} |
|
|
|
static const struct of_device_id max31760_of_match[] = { |
|
{.compatible = "adi,max31760"}, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, max31760_of_match); |
|
|
|
static const struct i2c_device_id max31760_id[] = { |
|
{"max31760"}, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, max31760_id); |
|
|
|
static int max31760_suspend(struct device *dev) |
|
{ |
|
struct max31760_state *state = dev_get_drvdata(dev); |
|
|
|
return regmap_set_bits(state->regmap, REG_CR2, CR2_STBY); |
|
} |
|
|
|
static int max31760_resume(struct device *dev) |
|
{ |
|
struct max31760_state *state = dev_get_drvdata(dev); |
|
|
|
return regmap_clear_bits(state->regmap, REG_CR2, CR2_STBY); |
|
} |
|
|
|
static DEFINE_SIMPLE_DEV_PM_OPS(max31760_pm_ops, max31760_suspend, |
|
max31760_resume); |
|
|
|
static struct i2c_driver max31760_driver = { |
|
.class = I2C_CLASS_HWMON, |
|
.driver = { |
|
.name = "max31760", |
|
.of_match_table = max31760_of_match, |
|
.pm = pm_ptr(&max31760_pm_ops) |
|
}, |
|
.probe_new = max31760_probe, |
|
.id_table = max31760_id |
|
}; |
|
module_i2c_driver(max31760_driver); |
|
|
|
MODULE_AUTHOR("Ibrahim Tilki <[email protected]>"); |
|
MODULE_DESCRIPTION("Analog Devices MAX31760 Fan Speed Controller"); |
|
MODULE_SOFTDEP("pre: regmap_i2c"); |
|
MODULE_VERSION("1.0"); |
|
MODULE_LICENSE("GPL");
|
|
|