The Microchip EMC2101 is a SMBus 2.0 fan controller with temperature
monitoring.
It supports up to 1 fan, 1 internal temperature sensor, 1 external
temperature sensor and an 8 entry look up table to create a
programmable temperature response.
Signed-off-by: Álvaro Fernández Rojas <noltari@xxxxxxxxx>
---
drivers/hwmon/Kconfig | 11 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/emc2101.c | 2176 +++++++++++++++++++++++++++++++++++++++
3 files changed, 2188 insertions(+)
create mode 100644 drivers/hwmon/emc2101.c
v3: multiple improvements:
- Switch to regmap-i2c.
- Use regmap fields.
- Add Power Management support.
- Demote dev_info() to dev_dbg().
- Remove "emc2101-r" i2c_device_id.
- Remove "microchip,emc2101-r" of_device_id.
- Properly implement standby mode.
- Use milliseconds instead of millihertz for update_interval.
- Drop mutex except for FAN_LUT_DISABLE and TEMP_EXT_CRIT_UNLOCK.
- Fix u16 fraction temperature conversions.
- Other code cleanups and refactors.
v2: multiple improvements:
- Remove FAN_RPM_MIN definition.
- Rename FAN_FALSE_READ to FAN_MIN_READ.
- pwm_auto_point_temp_hyst_store(): simplify function.
- emc2101_fan_min_read(): add missing FAN_MIN_READ condition.
- emc2101_fan_min_write(): fix tach_count calculation.
- emc2101_init(): fix REG_TACH_MIN value.
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 079620dd4286..16bcd560276e 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -2002,6 +2002,17 @@ config SENSORS_EMC1403
Threshold values can be configured using sysfs.
Data from the different diodes are accessible via sysfs.
+config SENSORS_EMC2101
+ tristate "SMSC EMC2101"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the SMSC EMC2101
+ fan controller chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called emc2101.
+
config SENSORS_EMC2103
tristate "SMSC EMC2103"
depends on I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 48e5866c0c9a..70e95096c6f2 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -73,6 +73,7 @@ obj-$(CONFIG_SENSORS_DRIVETEMP) += drivetemp.o
obj-$(CONFIG_SENSORS_DS620) += ds620.o
obj-$(CONFIG_SENSORS_DS1621) += ds1621.o
obj-$(CONFIG_SENSORS_EMC1403) += emc1403.o
+obj-$(CONFIG_SENSORS_EMC2101) += emc2101.o
obj-$(CONFIG_SENSORS_EMC2103) += emc2103.o
obj-$(CONFIG_SENSORS_EMC2305) += emc2305.o
obj-$(CONFIG_SENSORS_EMC6W201) += emc6w201.o
diff --git a/drivers/hwmon/emc2101.c b/drivers/hwmon/emc2101.c
new file mode 100644
index 000000000000..13a7860ef161
--- /dev/null
+++ b/drivers/hwmon/emc2101.c
@@ -0,0 +1,2176 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for Microchip EMC2101 fan controller.
+ *
+ * Copyright 2025 Álvaro Fernández Rojas <noltari@xxxxxxxxx>
+ */
+
+#include <linux/err.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/util_macros.h>
+
+#define REG_TEMP_INT 0x00
+#define REG_TEMP_EXT_HI 0x01
+#define REG_STATUS 0x02
+#define ADC_BUSY BIT(7)
+#define TEMP_INT_HIGH BIT(6)
+#define EEPROM_ERROR BIT(5)
+#define TEMP_EXT_HIGH BIT(4)
+#define TEMP_EXT_LOW BIT(3)
+#define TEMP_EXT_FAULT BIT(2)
+#define TEMP_EXT_CRIT BIT(1)
+#define TACH_LOW BIT(0)
+#define REG_CONFIG 0x03
+#define ALERT_IRQ_ACK BIT(7)
+#define FAN_STANDBY_ENABLE BIT(6)
+#define FAN_STANDBY_MODE BIT(5)
+#define FAN_MODE_DAC BIT(4)
+#define SMBUS_TOUT_DISABLE BIT(3)
+#define PIN_FUNC_TACH BIT(2)
+#define TEMP_EXT_CRIT_UNLOCK BIT(1)
+#define PIN_ASSERT_3_EXC BIT(0)
+#define REG_CONV_RATE 0x04
+#define CONV_RATE_SHIFT 0
+#define CONV_RATE_16000 0
+#define CONV_RATE_8000 1
+#define CONV_RATE_4000 2
+#define CONV_RATE_2000 3
+#define CONV_RATE_1000 4
+#define CONV_RATE_500 5
+#define CONV_RATE_250 6
+#define CONV_RATE_125 7
+#define CONV_RATE_62 8
+#define CONV_RATE_31 9
+#define CONV_RATE_MASK 0xf
+#define REG_TEMP_INT_MAX 0x05
+#define REG_TEMP_EXT_MAX_HI 0x07
+#define REG_TEMP_EXT_MIN_HI 0x08
+#define REG_TEMP_EXT_FORCE 0x0c
+#define REG_ONE_SHOT 0x0f
+#define REG_TEMP_EXT_LO 0x10
+#define REG_SCRATCHPAD_1 0x11
+#define REG_SCRATCHPAD_2 0x12
+#define REG_TEMP_EXT_MAX_LO 0x13
+#define REG_TEMP_EXT_MIN_LO 0x14
+#define REG_ALERT_MASK 0x16
+#define IRQ_TEMP_INT_MAX_DISABLE BIT(6)
+#define IRQ_TEMP_EXT_MAX_DISABLE BIT(4)
+#define IRQ_TEMP_EXT_MIN_DISABLE BIT(3)
+#define IRQ_TEMP_EXT_CRIT_DISABLE BIT(1)
+#define IRQ_TACH_MIN_DISABLE BIT(0)
+#define REG_EXT_IDEALITY 0x17
+#define EXT_IDEALITY_SHIFT 0
+#define EXT_IDEALITY_START 9846
+#define EXT_IDEALITY_STEP 13
+#define EXT_IDEALITY_VAL(x) (EXT_IDEALITY_START + \
+ ((x) * EXT_IDEALITY_STEP))
+#define EXT_IDEALITY_MASK 0x3f
+#define REG_BETA_COMP 0x18
+#define BETA_COMP_AUTO BIT(3)
+#define BETA_COMP_SHIFT 0
+#define BETA_COMP_DISABLE 7
+#define BETA_COMP_2_33 6
+#define BETA_COMP_1_00 5
+#define BETA_COMP_0_43 4
+#define BETA_COMP_0_33 3
+#define BETA_COMP_0_25 2
+#define BETA_COMP_0_18 1
+#define BETA_COMP_0_11 0
+#define BETA_COMP_MASK 0x7
+#define REG_TEMP_EXT_CRIT 0x19
+/* Can only be written once */
+#define REG_TEMP_EXT_CRIT_HYST 0x21
+#define REG_TACH_LO 0x46
+#define REG_TACH_HI 0x47
+#define REG_TACH_MIN_LO 0x48
+#define REG_TACH_MIN_HI 0x49
+#define REG_FAN_CONFIG 0x4a
+#define FAN_EXT_TEMP_FORCE BIT(6)
+#define FAN_LUT_DISABLE BIT(5)
+#define FAN_POL_INV BIT(4)
+#define FAN_CLK_SEL BIT(3)
+#define FAN_CLK_OVR BIT(2)
+#define TACH_FALSE_READ_SHIFT 0
+#define TACH_FALSE_READ_ENABLE 0
+#define TACH_FALSE_READ_DISABLE 3
+#define TACH_FALSE_READ_MASK 0x3
+#define REG_FAN_SPIN 0x4b
+#define FAN_SPIN_UP_ABORT BIT(5)
+#define FAN_SPIN_UP_POWER_SHIFT 3
+#define FAN_SPIN_UP_POWER_100 3
+#define FAN_SPIN_UP_POWER_75 2
+#define FAN_SPIN_UP_POWER_50 1
+#define FAN_SPIN_UP_POWER_0 0
+#define FAN_SPIN_UP_POWER_MASK 0x3
+#define FAN_SPIN_UP_TIME_SHIFT 0
+#define FAN_SPIN_UP_TIME_3200 7
+#define FAN_SPIN_UP_TIME_1600 6
+#define FAN_SPIN_UP_TIME_800 5
+#define FAN_SPIN_UP_TIME_400 4
+#define FAN_SPIN_UP_TIME_200 3
+#define FAN_SPIN_UP_TIME_100 2
+#define FAN_SPIN_UP_TIME_50 1
+#define FAN_SPIN_UP_TIME_0 0
+#define FAN_SPIN_UP_TIME_MASK 0x7
+#define REG_FAN_SET 0x4c
+#define FAN_SET_SHIFT 0
+#define FAN_SET_MASK 0x3f
+#define REG_PWM_FREQ 0x4d
+#define PWM_FREQ_SHIFT 0
+#define PWM_FREQ_MASK 0x1f
+#define REG_PWM_FREQ_DIV 0x4e
+#define REG_FAN_LUT_HYST 0x4f
+#define FAN_LUT_HYST_SHIFT 0
+#define FAN_LUT_HYST_MASK 0x1f
+#define REG_FAN_LUT_TEMP(x) (0x50 + (0x2 * (x)))
+/* Write only with FAN_LUT_DISABLE */
+#define FAN_LUT_TEMP_SHIFT 0
+#define FAN_LUT_TEMP_MASK 0x7f
+#define REG_FAN_LUT_SPEED(x) (0x51 + (0x2 * (x)))
+/* Write only with FAN_LUT_DISABLE */
+#define FAN_LUT_SPEED_SHIFT 0
+#define FAN_LUT_SPEED_MASK 0x3f
+#define REG_AVG_FILTER 0xbf
+#define FILTER_SHIFT 1
+#define FILTER_L2 3
+#define FILTER_L1 1
+#define FILTER_NONE 0
+#define FILTER_MASK 0x3
+#define ALERT_PIN_TEMP_COMP BIT(0)
+#define REG_PRODUCT_ID 0xfd
+#define REG_MANUFACTURER_ID 0xfe
+#define REG_REVISION 0xff
+
+#define CLK_FREQ_ALT 1400
+#define CLK_FREQ_BASE 360000
+
+#define FAN_LUT_COUNT 8
+#define FAN_LUT_HYST_MIN 0
+#define FAN_LUT_HYST_MAX 31
+#define FAN_MIN_READ 0xffff
+#define FAN_RPM_FACTOR 5400000
+
+#define MANUFACTURER_ID 0x5d
+
+#define PWM_MASK 0x3f
+
+#define TEMP_FAULT_OPEN 0x7f00
+#define TEMP_FAULT_SHORT 0x7fe0
+#define TEMP_LO_FRAC 125
+#define TEMP_LO_SHIFT 5
+#define TEMP_LO_MASK 0x7
+
+#define TEMP_MIN -64
+#define TEMP_MAX 127
+#define TEMP_MAX_FRAC 750
+
+enum emc2101_auto_channels_temp {
+ EMC2101_ACT_EXT = 2,
+ EMC2101_ACT_FORCE = 3
+};
+
+enum emc2101_mode {
+ EMC2101_MODE_PWM = 0,
+ EMC2101_MODE_DAC = 1
+};
+
+enum ecm2101_product_id {
+ EMC2101 = 0x16,
+ EMC2101_R = 0x28
+};
+
+enum emc2101_pwm {
+ EMC2101_PWM_MANUAL = 1,
+ EMC2101_PWM_LUT = 2
+};
+
+enum emc2101_temp_channels {
+ EMC2101_TC_INT = 0,
+ EMC2101_TC_EXT,
+ EMC2101_TC_FORCE,
+ EMC2101_TC_NUM
+};
+
+enum emc2101_temp_diode {
+ EMC2101_TD_CPU = 1,
+ EMC2101_TD_2N3904 = 2
+};
+
+enum emc2101_fields {
+ /* BETA_COMP */
+ F_BETA_COMP,
+ F_BETA_COMP_AUTO,
+
+ /* CONFIG */
+ F_TEMP_EXT_CRIT_UNLOCK,
+ F_PIN_FUNC_TACH,
+ F_SMBUS_TOUT_DISABLE,
+ F_FAN_MODE_DAC,
+ F_FAN_STBY,
+ F_STBY_MODE,
+
+ /* CONV_RATE */
+ F_CONV_RATE,
+
+ /* EXT_IDEALITY */
+ F_EXT_IDEALITY,
+
+ /* FAN_CONFIG */
+ F_TACH_FALSE_READ,
+ F_FAN_CLK_OVR,
+ F_FAN_CLK_SEL,
+ F_FAN_POL_INV,
+ F_FAN_LUT_DISABLE,
+ F_FAN_EXT_TEMP_FORCE,
+
+ /* FAN_LUT */
+ F_FAN_LUT_HYST,
+ F_FAN_LUT_SPEED_1,
+ F_FAN_LUT_SPEED_2,
+ F_FAN_LUT_SPEED_3,
+ F_FAN_LUT_SPEED_4,
+ F_FAN_LUT_SPEED_5,
+ F_FAN_LUT_SPEED_6,
+ F_FAN_LUT_SPEED_7,
+ F_FAN_LUT_SPEED_8,
+ F_FAN_LUT_TEMP_1,
+ F_FAN_LUT_TEMP_2,
+ F_FAN_LUT_TEMP_3,
+ F_FAN_LUT_TEMP_4,
+ F_FAN_LUT_TEMP_5,
+ F_FAN_LUT_TEMP_6,
+ F_FAN_LUT_TEMP_7,
+ F_FAN_LUT_TEMP_8,
+
+ /* FAN_SET */
+ F_FAN_SET,
+
+ /* FAN_SPIN */
+ F_SPIN_UP_TIME,
+ F_SPIN_UP_POWER,
+ F_SPIN_UP_ABORT,
+
+ /* PWM_FREQ */
+ F_PWM_FREQ,
+ F_PWM_FREQ_DIV,
+
+ /* STATUS */
+ F_TACH_LOW_ALARM,
+ F_TEMP_EXT_CRIT_ALARM,
+ F_TEMP_EXT_FAULT,
+ F_TEMP_EXT_LOW_ALARM,
+ F_TEMP_EXT_HIGH_ALARM,
+ F_TEMP_INT_HIGH_ALARM,
+
+ /* TEMP_INT */
+ F_TEMP_INT,
+ F_TEMP_INT_MAX,
+
+ /* TEMP_EXT */
+ F_TEMP_EXT_CRIT,
+ F_TEMP_EXT_CRIT_HYST,
+
+ /* TEMP_EXT_FORCE */
+ F_TEMP_EXT_FORCE,
+
+ /* sentinel */
+ F_MAX_FIELDS
+};
+
+#define F_FAN_LUT_SPEED(x) (F_FAN_LUT_SPEED_1 + (x))
+#define F_FAN_LUT_TEMP(x) (F_FAN_LUT_TEMP_1 + (x))
+
+static const struct reg_field emc2101_reg_fields[] = {
+ /* BETA_COMP */
+ [F_BETA_COMP] = REG_FIELD(REG_BETA_COMP, 0, 2),
+ [F_BETA_COMP_AUTO] = REG_FIELD(REG_BETA_COMP, 3, 3),
+
+ /* CONFIG */
+ [F_TEMP_EXT_CRIT_UNLOCK] = REG_FIELD(REG_CONFIG, 1, 1),
+ [F_PIN_FUNC_TACH] = REG_FIELD(REG_CONFIG, 2, 2),
+ [F_SMBUS_TOUT_DISABLE] = REG_FIELD(REG_CONFIG, 3, 3),
+ [F_FAN_MODE_DAC] = REG_FIELD(REG_CONFIG, 4, 4),
+ [F_FAN_STBY] = REG_FIELD(REG_CONFIG, 5, 5),
+ [F_STBY_MODE] = REG_FIELD(REG_CONFIG, 6, 6),
+
+ /* CONV_RATE */
+ [F_CONV_RATE] = REG_FIELD(REG_CONV_RATE, 0, 3),
+
+ /* EXT_IDEALITY */
+ [F_EXT_IDEALITY] = REG_FIELD(REG_EXT_IDEALITY, 0, 5),
+
+ /* FAN_CONFIG */
+ [F_TACH_FALSE_READ] = REG_FIELD(REG_FAN_CONFIG, 0, 1),
+ [F_FAN_CLK_OVR] = REG_FIELD(REG_FAN_CONFIG, 2, 2),
+ [F_FAN_CLK_SEL] = REG_FIELD(REG_FAN_CONFIG, 3, 3),
+ [F_FAN_POL_INV] = REG_FIELD(REG_FAN_CONFIG, 4, 4),
+ [F_FAN_LUT_DISABLE] = REG_FIELD(REG_FAN_CONFIG, 5, 5),
+ [F_FAN_EXT_TEMP_FORCE] = REG_FIELD(REG_FAN_CONFIG, 6, 6),
+
+ /* FAN_LUT */
+ [F_FAN_LUT_HYST] = REG_FIELD(REG_FAN_LUT_HYST, 0, 4),
+ [F_FAN_LUT_SPEED_1] = REG_FIELD(REG_FAN_LUT_SPEED(0), 0, 5),
+ [F_FAN_LUT_SPEED_2] = REG_FIELD(REG_FAN_LUT_SPEED(1), 0, 5),
+ [F_FAN_LUT_SPEED_3] = REG_FIELD(REG_FAN_LUT_SPEED(2), 0, 5),
+ [F_FAN_LUT_SPEED_4] = REG_FIELD(REG_FAN_LUT_SPEED(3), 0, 5),
+ [F_FAN_LUT_SPEED_5] = REG_FIELD(REG_FAN_LUT_SPEED(4), 0, 5),
+ [F_FAN_LUT_SPEED_6] = REG_FIELD(REG_FAN_LUT_SPEED(5), 0, 5),
+ [F_FAN_LUT_SPEED_7] = REG_FIELD(REG_FAN_LUT_SPEED(6), 0, 5),
+ [F_FAN_LUT_SPEED_8] = REG_FIELD(REG_FAN_LUT_SPEED(7), 0, 5),
+ [F_FAN_LUT_TEMP_1] = REG_FIELD(REG_FAN_LUT_TEMP(0), 0, 6),
+ [F_FAN_LUT_TEMP_2] = REG_FIELD(REG_FAN_LUT_TEMP(1), 0, 6),
+ [F_FAN_LUT_TEMP_3] = REG_FIELD(REG_FAN_LUT_TEMP(2), 0, 6),
+ [F_FAN_LUT_TEMP_4] = REG_FIELD(REG_FAN_LUT_TEMP(3), 0, 6),
+ [F_FAN_LUT_TEMP_5] = REG_FIELD(REG_FAN_LUT_TEMP(4), 0, 6),
+ [F_FAN_LUT_TEMP_6] = REG_FIELD(REG_FAN_LUT_TEMP(5), 0, 6),
+ [F_FAN_LUT_TEMP_7] = REG_FIELD(REG_FAN_LUT_TEMP(6), 0, 6),
+ [F_FAN_LUT_TEMP_8] = REG_FIELD(REG_FAN_LUT_TEMP(7), 0, 6),
+
+ /* FAN_SET */
+ [F_FAN_SET] = REG_FIELD(REG_FAN_SET, 0, 5),
+
+ /* FAN_SPIN */
+ [F_SPIN_UP_TIME] = REG_FIELD(REG_FAN_SPIN, 0, 2),
+ [F_SPIN_UP_POWER] = REG_FIELD(REG_FAN_SPIN, 3, 4),
+ [F_SPIN_UP_ABORT] = REG_FIELD(REG_FAN_SPIN, 5, 5),
+
+ /* PWM_FREQ */
+ [F_PWM_FREQ] = REG_FIELD(REG_PWM_FREQ, 0, 4),
+ [F_PWM_FREQ_DIV] = REG_FIELD(REG_PWM_FREQ_DIV, 0, 7),
+
+ /* STATUS */
+ [F_TACH_LOW_ALARM] = REG_FIELD(REG_STATUS, 0, 0),
+ [F_TEMP_EXT_CRIT_ALARM] = REG_FIELD(REG_STATUS, 1, 1),
+ [F_TEMP_EXT_FAULT] = REG_FIELD(REG_STATUS, 2, 2),
+ [F_TEMP_EXT_LOW_ALARM] = REG_FIELD(REG_STATUS, 3, 3),
+ [F_TEMP_EXT_HIGH_ALARM] = REG_FIELD(REG_STATUS, 4, 4),
+ [F_TEMP_INT_HIGH_ALARM] = REG_FIELD(REG_STATUS, 6, 6),
+
+ /* TEMP_INT */
+ [F_TEMP_INT] = REG_FIELD(REG_TEMP_INT, 0, 7),
+ [F_TEMP_INT_MAX] = REG_FIELD(REG_TEMP_INT_MAX, 0, 6),
+
+ /* TEMP_EXT */
+ [F_TEMP_EXT_CRIT] = REG_FIELD(REG_TEMP_EXT_CRIT, 0, 6),
+ [F_TEMP_EXT_CRIT_HYST] = REG_FIELD(REG_TEMP_EXT_CRIT_HYST, 0, 6),
+
+ /* TEMP_EXT_FORCE */
+ [F_TEMP_EXT_FORCE] = REG_FIELD(REG_TEMP_EXT_FORCE, 0, 7),
+};
+
+struct emc2101_data {
+ struct regmap *regmap;
+ struct regmap_field *fields[F_MAX_FIELDS];
+ struct device *dev;
+ struct mutex mutex; /* serializes FAN_LUT_DISABLE and TEMP_EXT_CRIT_UNLOCK */
+};
+
+static const u16 emc2101_conv_time[] = {
+ 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 62, 31
+};
+
+static const u8 emc2101_fan_spin_up_power[] = {
+ 0, 50, 75, 100
+};
+
+static const u16 emc2101_fan_spin_up_time[] = {
+ 0, 50, 100, 200, 400, 800, 1600, 3200
+};
+
+static const unsigned int regs_tach[2] = {REG_TACH_HI, REG_TACH_LO};
+static const unsigned int regs_tach_min[2] = {REG_TACH_MIN_HI, REG_TACH_MIN_LO};
+static const unsigned int regs_temp_ext[2] = {REG_TEMP_EXT_HI, REG_TEMP_EXT_LO};
+static const unsigned int regs_temp_ext_max[2] = {REG_TEMP_EXT_MAX_HI, REG_TEMP_EXT_MAX_LO};
+static const unsigned int regs_temp_ext_min[2] = {REG_TEMP_EXT_MIN_HI, REG_TEMP_EXT_MIN_LO};
+
+static inline int emc2101_read_u16(struct emc2101_data *data, const unsigned int *regs, u16 *val)
+{
+ u8 read_seq[2];
+ int ret;
+
+ ret = regmap_multi_reg_read(data->regmap, regs, read_seq, 2);
+ if (!ret) {
+ *val = (read_seq[0] & 0xff) << 8;
+ *val |= read_seq[1] & 0xff;
+ }
+
+ return ret;
+}
+
+static inline int emc2101_write_u16(struct emc2101_data *data, const unsigned int *regs, u16 val)
+{
+ const struct reg_sequence write_seq[2] = {
+ { regs[0], (val >> 8) & 0xff },
+ { regs[1], val & 0xff },
+ };
+
+ return regmap_multi_reg_write(data->regmap, write_seq, 2);
+}
+
+static inline u16 emc2101_rpm_to_u16(long rpm)
+{
+ u16 val;
+
+ if (rpm > 0)
+ val = clamp_val(FAN_RPM_FACTOR / rpm, 1, FAN_MIN_READ);
+ else
+ val = FAN_MIN_READ;
+
+ return val;
+}
+
+static inline long emc2101_u16_to_rpm(u16 val)
+{
+ long rpm;
+
+ val = clamp_val(val, 1, FAN_MIN_READ);
+ if (val < FAN_MIN_READ)
+ rpm = FAN_RPM_FACTOR / val;
+ else
+ rpm = 0;
+
+ return rpm;
+}
+
+static inline u16 emc2101_temp_to_u16(long temp)
+{
+ s8 val_hi = clamp_val(temp / 1000, TEMP_MIN, TEMP_MAX);
+ long rem = temp % 1000;
+ u8 val_lo;
+
+ if (val_hi == TEMP_MIN)
+ rem = 0;
+ else if (val_hi == TEMP_MAX)
+ rem = TEMP_MAX_FRAC;
+
+ if (rem < 0) {
+ val_hi -= 1;
+ rem = (1000 + rem);
+ }
+
+ rem /= TEMP_LO_FRAC;
+ val_lo = (rem & TEMP_LO_MASK) << TEMP_LO_SHIFT;
+
+ return (val_hi << 8) | val_lo;
+}
+
+static inline long emc2101_u16_to_temp(u16 val)
+{
+ const s8 val_hi = (val >> 8) & 0xff;
+ const u8 val_lo = (val >> TEMP_LO_SHIFT) & TEMP_LO_MASK;
+ long temp;
+
+ temp = val_hi * 1000;
+ temp += val_lo * TEMP_LO_FRAC;
+
+ return temp;
+}
+
+static inline bool emc2101_lut_edit(struct emc2101_data *data, bool *disabled)
+{
+ unsigned int lut_disabled;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_LUT_DISABLE], &lut_disabled);
+ if (ret)
+ return ret;
+
+ *disabled = lut_disabled;
+
+ return regmap_field_write(data->fields[F_FAN_LUT_DISABLE], 1);
+}
+
+static inline bool emc2101_lut_restore(struct emc2101_data *data, bool disabled)
+{
+ if (!disabled)
+ return regmap_field_write(data->fields[F_FAN_LUT_DISABLE], 0);
+
+ return 0;
+}
+
+static int emc2101_lut_hyst_write(struct regmap_field *field, long temp)
+{
+ const unsigned int val = clamp_val(temp / 1000, FAN_LUT_HYST_MIN, FAN_LUT_HYST_MAX);
+
+ return regmap_field_write(field, val);
+}
+
+static int emc2101_temp_neg_read(struct regmap_field *field, long *temp)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_field_read(field, &val);
+ if (!ret)
+ *temp = ((s8) val) * 1000;
+
+ return ret;
+}
+
+static int emc2101_temp_neg_write(struct regmap_field *field, long temp)
+{
+ const s8 val = clamp_val(temp / 1000, TEMP_MIN, TEMP_MAX);
+
+ return regmap_field_write(field, val);
+}
+
+static int emc2101_temp_pos_read(struct regmap_field *field, long *temp)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_field_read(field, &val);
+ if (!ret)
+ *temp = val * 1000;
+
+ return ret;
+}
+
+static int emc2101_temp_pos_write(struct regmap_field *field, long temp)
+{
+ const u8 val = clamp_val(temp / 1000, 0, TEMP_MAX);
+
+ return regmap_field_write(field, val);
+}
+
+static int emc2101_temp_frac_read(struct emc2101_data *data, const unsigned int *regs, long *temp)
+{
+ u16 temp_frac;
+ int ret;
+
+ ret = emc2101_read_u16(data, regs, &temp_frac);
+ if (ret)
+ return ret;
+
+ switch (temp_frac) {
+ case TEMP_FAULT_OPEN:
+ dev_warn(data->dev, "[%02x, %02x]: diode fault (open)", regs[0], regs[1]);
+ return -ENODATA;
+ case TEMP_FAULT_SHORT:
+ dev_warn(data->dev, "[%02x, %02x]: diode fault (short)", regs[0], regs[1]);
+ return -ENODATA;
+ default:
+ break;
+ }
+
+ *temp = emc2101_u16_to_temp(temp_frac);
+
+ return ret;
+}
+
+static int emc2101_temp_frac_write(struct emc2101_data *data, const unsigned int *regs, long temp)
+{
+ long temp_frac = emc2101_temp_to_u16(temp);
+
+ return emc2101_write_u16(data, regs, temp_frac);
+}
+
+static int emc2101_pwm_write(struct regmap_field *field, long pwm)
+{
+ const unsigned int val = clamp_val(pwm, 0, PWM_MASK);
+
+ return regmap_field_write(field, val);
+}
+
+static ssize_t fan_spin_up_abort_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_spin_abort;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_SPIN_UP_ABORT], &fan_spin_abort);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", fan_spin_abort);
+}
+
+static ssize_t fan_spin_up_abort_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_spin_abort;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &fan_spin_abort);
+ if (ret)
+ return ret;
+
+ switch (fan_spin_abort) {
+ case 0:
+ case 1:
+ ret = regmap_field_write(data->fields[F_SPIN_UP_ABORT], fan_spin_abort);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return !ret ? count : ret;
+}
+
+static ssize_t fan_spin_up_time_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_spin_time;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_SPIN_UP_TIME], &fan_spin_time);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", emc2101_fan_spin_up_time[fan_spin_time]);
+}
+
+static ssize_t fan_spin_up_time_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_spin_time, val;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &fan_spin_time);
+ if (ret)
+ return ret;
+
+ val = find_closest(fan_spin_time, emc2101_fan_spin_up_time,
+ ARRAY_SIZE(emc2101_fan_spin_up_time));
+
+ ret = regmap_field_write(data->fields[F_SPIN_UP_TIME], val);
+
+ return !ret ? count : ret;
+}
+
+static ssize_t fan_spin_up_power_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_spin_power;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_SPIN_UP_POWER], &fan_spin_power);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", emc2101_fan_spin_up_power[fan_spin_power]);
+}
+
+static ssize_t fan_spin_up_power_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_spin_power, val;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &fan_spin_power);
+ if (ret)
+ return ret;
+
+ val = find_closest(fan_spin_power, emc2101_fan_spin_up_power,
+ ARRAY_SIZE(emc2101_fan_spin_up_power));
+
+ ret = regmap_field_write(data->fields[F_SPIN_UP_POWER], val);
+
+ return !ret ? count : ret;
+}
+
+static ssize_t fan_standby_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_standby;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_STBY], &fan_standby);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", fan_standby);
+}
+
+static ssize_t fan_standby_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_standby;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &fan_standby);
+ if (ret)
+ return ret;
+
+ switch (fan_standby) {
+ case 0:
+ case 1:
+ ret = regmap_field_write(data->fields[F_FAN_STBY], fan_standby);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return !ret ? count : ret;
+}
+
+static ssize_t pwm_auto_point_pwm_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int lut_pwm;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_LUT_SPEED(attr->index)], &lut_pwm);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", lut_pwm);
+}
+
+static ssize_t __pwm_auto_point_pwm_store(struct emc2101_data *data,
+ struct device_attribute *devattr, unsigned int lut_pwm)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ bool lut_disable;
+ int ret;
+
+ ret = emc2101_lut_edit(data, &lut_disable);
+ if (ret)
+ return ret;
+
+ ret = emc2101_pwm_write(data->fields[F_FAN_LUT_SPEED(attr->index)], lut_pwm);
+ if (ret)
+ return ret;
+
+ return emc2101_lut_restore(data, lut_disable);
+}
+
+static ssize_t pwm_auto_point_pwm_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int lut_pwm;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &lut_pwm);
+ if (ret)
+ return ret;
+
+ mutex_lock(&data->mutex);
+ ret = __pwm_auto_point_pwm_store(data, devattr, lut_pwm);
+ mutex_unlock(&data->mutex);
+
+ return !ret ? count : ret;
+}
+
+static ssize_t pwm_auto_point_temp_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ long lut_temp;
+ int ret;
+
+ ret = emc2101_temp_pos_read(data->fields[F_FAN_LUT_TEMP(attr->index)], &lut_temp);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%lu\n", lut_temp);
+}
+
+static ssize_t __pwm_auto_point_temp_store(struct emc2101_data *data,
+ struct device_attribute *devattr, unsigned int lut_temp)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ bool lut_disable;
+ unsigned int i;
+ long cur_temp;
+ int ret;
+
+ ret = emc2101_lut_edit(data, &lut_disable);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < FAN_LUT_COUNT; i++) {
+ struct regmap_field *field = data->fields[F_FAN_LUT_TEMP(i)];
+
+ ret = emc2101_temp_pos_read(field, &cur_temp);
+ if (ret)
+ return ret;
+
+ if (i < attr->index) {
+ if (cur_temp > lut_temp)
+ ret = emc2101_temp_pos_write(field, lut_temp);
+ } else if (i > attr->index) {
+ if (cur_temp < lut_temp)
+ ret = emc2101_temp_pos_write(field, lut_temp);
+ } else {
+ ret = emc2101_temp_pos_write(field, lut_temp);
+ }
+
+ if (ret)
+ return ret;
+ }
+
+ return emc2101_lut_restore(data, lut_disable);
+}
+
+static ssize_t pwm_auto_point_temp_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int lut_temp;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &lut_temp);
+ if (ret)
+ return ret;
+
+ mutex_lock(&data->mutex);
+ ret = __pwm_auto_point_temp_store(data, devattr, lut_temp);
+ mutex_unlock(&data->mutex);
+
+ return !ret ? count : ret;
+}
+
+static ssize_t pwm_auto_point_temp_hyst_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ long lut_hyst;
+ int ret;
+
+ ret = emc2101_temp_pos_read(data->fields[F_FAN_LUT_HYST], &lut_hyst);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%lu\n", lut_hyst);
+}
+
+static ssize_t pwm_auto_point_temp_hyst_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int lut_hyst;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &lut_hyst);
+ if (ret)
+ return ret;
+
+ ret = emc2101_lut_hyst_write(data->fields[F_FAN_LUT_HYST], lut_hyst);
+
+ return !ret ? count : ret;
+}
+
+static ssize_t pwm_polarity_invert_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int polarity_inverted;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_POL_INV], &polarity_inverted);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", polarity_inverted);
+}
+
+static ssize_t pwm_polarity_invert_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int polarity_inverted;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &polarity_inverted);
+ if (ret)
+ return ret;
+
+ switch (polarity_inverted) {
+ case 0:
+ case 1:
+ ret = regmap_field_write(data->fields[F_FAN_POL_INV], polarity_inverted);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return !ret ? count : ret;
+}
+
+static ssize_t temp_external_force_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ long temp_force;
+ int ret;
+
+ ret = emc2101_temp_neg_read(data->fields[F_TEMP_EXT_FORCE], &temp_force);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%ld\n", temp_force);
+}
+
+static ssize_t temp_external_force_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ long temp_force;
+ int ret;
+
+ ret = kstrtol(buf, 10, &temp_force);
+ if (ret)
+ return ret;
+
+ ret = emc2101_temp_neg_write(data->fields[F_TEMP_EXT_FORCE], temp_force);
+
+ return !ret ? count : ret;
+}
+
+static ssize_t temp_external_ideality_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int ext_ideality;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_EXT_IDEALITY], &ext_ideality);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", EXT_IDEALITY_VAL(ext_ideality));
+}
+
+static ssize_t temp_external_ideality_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int ext_ideality_factor, val;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &ext_ideality_factor);
+ if (ret)
+ return ret;
+
+ ext_ideality_factor = clamp_val(ext_ideality_factor, EXT_IDEALITY_START,
+ EXT_IDEALITY_VAL(EXT_IDEALITY_MASK));
+ val = (ext_ideality_factor - EXT_IDEALITY_START) / EXT_IDEALITY_STEP;
+
+ ret = regmap_field_write(data->fields[F_EXT_IDEALITY], val);
+
+ return !ret ? count : ret;
+}
+
+static SENSOR_DEVICE_ATTR_RW(fan1_spin_up_abort, fan_spin_up_abort, 0);
+static SENSOR_DEVICE_ATTR_RW(fan1_spin_up_power, fan_spin_up_power, 0);
+static SENSOR_DEVICE_ATTR_RW(fan1_spin_up_time, fan_spin_up_time, 0);
+static SENSOR_DEVICE_ATTR_RW(fan1_standby, fan_standby, 0);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_auto_point_pwm, 0);
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_auto_point_temp, 0);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_auto_point_pwm, 1);
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_temp, pwm_auto_point_temp, 1);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point3_pwm, pwm_auto_point_pwm, 2);
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point3_temp, pwm_auto_point_temp, 2);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point4_pwm, pwm_auto_point_pwm, 3);
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point4_temp, pwm_auto_point_temp, 3);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point5_pwm, pwm_auto_point_pwm, 4);
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point5_temp, pwm_auto_point_temp, 4);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point6_pwm, pwm_auto_point_pwm, 5);
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point6_temp, pwm_auto_point_temp, 5);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point7_pwm, pwm_auto_point_pwm, 6);
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point7_temp, pwm_auto_point_temp, 6);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point8_pwm, pwm_auto_point_pwm, 7);
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point8_temp, pwm_auto_point_temp, 7);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point_temp_hyst, pwm_auto_point_temp_hyst, 0);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_polarity_invert, pwm_polarity_invert, 0);
+
+static SENSOR_DEVICE_ATTR_RW(temp2_external_ideality, temp_external_ideality, 0);
+
+static SENSOR_DEVICE_ATTR_RW(temp3, temp_external_force, 0);
+
+static struct attribute *emc2101_hwmon_attributes[] = {
+ &sensor_dev_attr_fan1_spin_up_abort.dev_attr.attr,
+ &sensor_dev_attr_fan1_spin_up_power.dev_attr.attr,
+ &sensor_dev_attr_fan1_spin_up_time.dev_attr.attr,
+ &sensor_dev_attr_fan1_standby.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point_temp_hyst.dev_attr.attr,
+ &sensor_dev_attr_pwm1_polarity_invert.dev_attr.attr,
+ &sensor_dev_attr_temp2_external_ideality.dev_attr.attr,
+ &sensor_dev_attr_temp3.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group emc2101_hwmon_group = {
+ .attrs = emc2101_hwmon_attributes,
+};
+__ATTRIBUTE_GROUPS(emc2101_hwmon);
+
+static int emc2101_chip_update_interval_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int conv_rate;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_CONV_RATE], &conv_rate);
+ if (!ret) {
+ if (conv_rate < ARRAY_SIZE(emc2101_conv_time))
+ *val = emc2101_conv_time[conv_rate];
+ else
+ *val = emc2101_conv_time[CONV_RATE_31];
+ }
+
+ return ret;
+}
+
+static int emc2101_chip_update_interval_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int conv_rate;
+
+ conv_rate = find_closest_descending(val, emc2101_conv_time, ARRAY_SIZE(emc2101_conv_time));
+
+ return regmap_field_write(data->fields[F_CONV_RATE], conv_rate);
+}
+
+static int emc2101_fan_div_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int pwm_freq_div;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_PWM_FREQ_DIV], &pwm_freq_div);
+ if (!ret)
+ *val = pwm_freq_div;
+
+ return ret;
+}
+
+static int emc2101_fan_div_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ struct regmap_field *field = data->fields[F_PWM_FREQ_DIV];
+ unsigned int pwm_freq_div;
+
+ pwm_freq_div = clamp_val(val, 1, 0xff);
+
+ return regmap_field_write(field, pwm_freq_div);
+}
+
+static int emc2101_fan_input_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ u16 tach_count;
+ int ret;
+
+ ret = emc2101_read_u16(data, regs_tach, &tach_count);
+ if (ret)
+ return ret;
+
+ *val = emc2101_u16_to_rpm(tach_count);
+
+ return 0;
+}
+
+static int emc2101_fan_min_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ u16 tach_count;
+ int ret;
+
+ ret = emc2101_read_u16(data, regs_tach_min, &tach_count);
+ if (ret)
+ return ret;
+
+ *val = emc2101_u16_to_rpm(tach_count);
+
+ return 0;
+}
+
+static int emc2101_fan_min_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ u16 tach_count = emc2101_rpm_to_u16(val);
+
+ return emc2101_write_u16(data, regs_tach_min, tach_count);
+}
+
+static int emc2101_fan_min_alarm_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int tach_low;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_TACH_LOW_ALARM], &tach_low);
+ if (ret)
+ return ret;
+
+ *val = tach_low;
+
+ return 0;
+}
+
+static int emc2101_pwm_auto_channels_temp_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int temp_ext_force;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_EXT_TEMP_FORCE], &temp_ext_force);
+ if (ret)
+ return ret;
+
+ *val = temp_ext_force ? EMC2101_ACT_FORCE : EMC2101_ACT_EXT;
+
+ return 0;
+}
+
+static int emc2101_pwm_auto_channels_temp_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ switch (val) {
+ case EMC2101_ACT_EXT:
+ ret = regmap_field_write(data->fields[F_FAN_EXT_TEMP_FORCE], 0);
+ break;
+ case EMC2101_ACT_FORCE:
+ ret = regmap_field_write(data->fields[F_FAN_EXT_TEMP_FORCE], 1);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return ret;
+}
+
+static int emc2101_pwm_enable_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int lut_disable;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_LUT_DISABLE], &lut_disable);
+ if (ret)
+ return ret;
+
+ *val = lut_disable ? EMC2101_PWM_MANUAL : EMC2101_PWM_LUT;
+
+ return 0;
+}
+
+static int emc2101_pwm_enable_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int lut_disable;
+ int ret;
+
+ switch (val) {
+ case EMC2101_PWM_MANUAL:
+ lut_disable = 1;
+ break;
+ case EMC2101_PWM_LUT:
+ lut_disable = 0;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ mutex_lock(&data->mutex);
+ ret = regmap_field_write(data->fields[F_FAN_LUT_DISABLE], lut_disable);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int emc2101_pwm_freq_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_clk_ovr, fan_clk_sel;
+ unsigned int pwm_freq, pwm_freq_div;
+ unsigned int base_clk, div;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_CLK_OVR], &fan_clk_ovr);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_CLK_SEL], &fan_clk_sel);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_read(data->fields[F_PWM_FREQ], &pwm_freq);
+ if (ret)
+ return ret;
+
+ if (fan_clk_ovr) {
+ ret = regmap_field_read(data->fields[F_PWM_FREQ_DIV], &pwm_freq_div);
+ if (ret)
+ return ret;
+ } else {
+ pwm_freq_div = 1;
+ }
+
+ if (fan_clk_sel)
+ base_clk = CLK_FREQ_ALT;
+ else
+ base_clk = CLK_FREQ_BASE;
+
+ div = 2 * pwm_freq * pwm_freq_div;
+ if (div)
+ *val = base_clk / div;
+ else
+ *val = 0;
+
+ return ret;
+}
+
+static int emc2101_pwm_freq_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_clk_ovr, fan_clk_sel;
+ unsigned int pwm_freq, pwm_freq_div;
+ unsigned int base_clk;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_CLK_OVR], &fan_clk_ovr);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_CLK_SEL], &fan_clk_sel);
+ if (ret)
+ return ret;
+
+ if (fan_clk_ovr) {
+ ret = regmap_field_read(data->fields[F_PWM_FREQ_DIV], &pwm_freq_div);
+ if (ret)
+ return ret;
+ } else {
+ pwm_freq_div = 1;
+ }
+
+ if (fan_clk_sel)
+ base_clk = CLK_FREQ_ALT;
+ else
+ base_clk = CLK_FREQ_BASE;
+
+ pwm_freq = base_clk / (2 * pwm_freq_div * val);
+
+ return emc2101_pwm_write(data->fields[F_PWM_FREQ], pwm_freq);
+}
+
+static int emc2101_pwm_input_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_set;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_SET], &fan_set);
+ if (!ret)
+ *val = fan_set;
+
+ return ret;
+}
+
+static int emc2101_pwm_input_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_pwm_write(data->fields[F_FAN_SET], val);
+}
+
+static int emc2101_pwm_mode_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int fan_mode_dac;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_FAN_MODE_DAC], &fan_mode_dac);
+ if (ret)
+ return ret;
+
+ *val = fan_mode_dac ? EMC2101_MODE_DAC : EMC2101_MODE_PWM;
+
+ return ret;
+}
+
+static int emc2101_pwm_mode_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ switch (val) {
+ case EMC2101_MODE_DAC:
+ case EMC2101_MODE_PWM:
+ ret = regmap_field_write(data->fields[F_FAN_MODE_DAC], val);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return ret;
+}
+
+static int emc2101_temp_ext_crit_alarm_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int temp_ext_crit;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_TEMP_EXT_CRIT_ALARM], &temp_ext_crit);
+ if (ret)
+ return ret;
+
+ *val = temp_ext_crit;
+
+ return 0;
+}
+
+static int emc2101_temp_ext_crit_hyst_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_pos_read(data->fields[F_TEMP_EXT_CRIT_HYST], val);
+}
+
+static int emc2101_temp_ext_crit_hyst_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_pos_write(data->fields[F_TEMP_EXT_CRIT_HYST], val);
+}
+
+static int emc2101_temp_ext_crit_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_pos_read(data->fields[F_TEMP_EXT_CRIT], val);
+}
+
+static int __emc2101_temp_ext_crit_write(struct emc2101_data *data, long val)
+{
+ unsigned int temp_ext_crit_unlock;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_TEMP_EXT_CRIT_UNLOCK], &temp_ext_crit_unlock);
+ if (ret)
+ return ret;
+
+ if (temp_ext_crit_unlock) {
+ dev_err(data->dev, "critical temperature can only be updated once");
+ return -EIO;
+ }
+
+ ret = regmap_field_write(data->fields[F_TEMP_EXT_CRIT_UNLOCK], 1);
+ if (ret)
+ return ret;
+
+ return emc2101_temp_pos_write(data->fields[F_TEMP_EXT_CRIT], val);
+}
+
+static int emc2101_temp_ext_crit_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = __emc2101_temp_ext_crit_write(data, val);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int emc2101_temp_ext_fault_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int temp_ext_fault;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_TEMP_EXT_FAULT], &temp_ext_fault);
+ if (ret)
+ return ret;
+
+ *val = temp_ext_fault;
+
+ return 0;
+}
+
+static int emc2101_temp_ext_max_alarm_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int temp_ext_high;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_TEMP_EXT_HIGH_ALARM], &temp_ext_high);
+ if (ret)
+ return ret;
+
+ *val = temp_ext_high;
+
+ return 0;
+}
+
+static int emc2101_temp_ext_max_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_frac_read(data, regs_temp_ext_max, val);
+}
+
+static int emc2101_temp_ext_max_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_frac_write(data, regs_temp_ext_max, val);
+}
+
+static int emc2101_temp_ext_min_alarm_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int temp_ext_low;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_TEMP_EXT_LOW_ALARM], &temp_ext_low);
+ if (ret)
+ return ret;
+
+ *val = temp_ext_low;
+
+ return 0;
+}
+
+static int emc2101_temp_ext_min_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_frac_read(data, regs_temp_ext_min, val);
+}
+
+static int emc2101_temp_ext_min_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_frac_write(data, regs_temp_ext_min, val);
+}
+
+static int emc2101_temp_ext_type_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int beta_comp, beta_comp_auto;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_BETA_COMP], &beta_comp);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_read(data->fields[F_BETA_COMP], &beta_comp_auto);
+ if (ret)
+ return ret;
+
+ if (beta_comp == BETA_COMP_DISABLE && !beta_comp_auto)
+ *val = EMC2101_TD_2N3904;
+ else
+ *val = EMC2101_TD_CPU;
+
+ return 0;
+}
+
+static int emc2101_temp_ext_type_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int beta_comp, beta_comp_auto;
+ int ret;
+
+ switch (val) {
+ case EMC2101_TD_CPU:
+ beta_comp = 0;
+ beta_comp_auto = 1;
+ break;
+ case EMC2101_TD_2N3904:
+ beta_comp = BETA_COMP_DISABLE;
+ beta_comp_auto = 0;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ ret = regmap_field_write(data->fields[F_BETA_COMP_AUTO], beta_comp_auto);
+ if (ret)
+ return ret;
+
+ return regmap_field_write(data->fields[F_BETA_COMP], beta_comp);
+}
+
+static int emc2101_temp_ext_input_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_frac_read(data, regs_temp_ext, val);
+}
+
+static int emc2101_temp_int_max_alarm_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+ unsigned int temp_int_high;
+ int ret;
+
+ ret = regmap_field_read(data->fields[F_TEMP_INT_HIGH_ALARM], &temp_int_high);
+ if (ret)
+ return ret;
+
+ *val = temp_int_high;
+
+ return 0;
+}
+
+static int emc2101_temp_int_max_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_pos_read(data->fields[F_TEMP_INT_MAX], val);
+}
+
+static int emc2101_temp_int_max_write(struct device *dev, long val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_pos_write(data->fields[F_TEMP_INT_MAX], val);
+}
+
+static int emc2101_temp_int_input_read(struct device *dev, long *val)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return emc2101_temp_neg_read(data->fields[F_TEMP_INT], val);
+}
+
+static umode_t emc2101_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr,
+ int channel)
+{
+ int max_channels;
+
+ if (type == hwmon_temp)
+ max_channels = EMC2101_TC_NUM;
+ else
+ max_channels = 1;
+
+ if (channel >= max_channels)
+ return 0;
+
+ switch (type) {
+ case hwmon_chip:
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ return 0644;
+ default:
+ break;
+ }
+ break;
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_input:
+ case hwmon_fan_min_alarm:
+ return 0444;
+ case hwmon_fan_div:
+ case hwmon_fan_min:
+ return 0644;
+ default:
+ break;
+ }
+ break;
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_auto_channels_temp:
+ case hwmon_pwm_enable:
+ case hwmon_pwm_freq:
+ case hwmon_pwm_input:
+ case hwmon_pwm_mode:
+ return 0644;
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp:
+ switch (attr) {
+ case hwmon_temp_crit_alarm:
+ case hwmon_temp_fault:
+ case hwmon_temp_input:
+ case hwmon_temp_label:
+ case hwmon_temp_max_alarm:
+ case hwmon_temp_min_alarm:
+ return 0444;
+ case hwmon_temp_crit:
+ case hwmon_temp_crit_hyst:
+ case hwmon_temp_max:
+ case hwmon_temp_min:
+ case hwmon_temp_type:
+ return 0644;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+};
+
+static int emc2101_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
+ long *val)
+{
+ switch (type) {
+ case hwmon_chip:
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ return emc2101_chip_update_interval_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_div:
+ return emc2101_fan_div_read(dev, val);
+ case hwmon_fan_input:
+ return emc2101_fan_input_read(dev, val);
+ case hwmon_fan_min:
+ return emc2101_fan_min_read(dev, val);
+ case hwmon_fan_min_alarm:
+ return emc2101_fan_min_alarm_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_auto_channels_temp:
+ return emc2101_pwm_auto_channels_temp_read(dev, val);
+ case hwmon_pwm_enable:
+ return emc2101_pwm_enable_read(dev, val);
+ case hwmon_pwm_freq:
+ return emc2101_pwm_freq_read(dev, val);
+ case hwmon_pwm_input:
+ return emc2101_pwm_input_read(dev, val);
+ case hwmon_pwm_mode:
+ return emc2101_pwm_mode_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp:
+ switch (attr) {
+ case hwmon_temp_crit:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_crit_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_crit_alarm:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_crit_alarm_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_crit_hyst:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_crit_hyst_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_fault:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_fault_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_input:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_input_read(dev, val);
+ case EMC2101_TC_INT:
+ return emc2101_temp_int_input_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_max:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_max_read(dev, val);
+ case EMC2101_TC_INT:
+ return emc2101_temp_int_max_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_max_alarm:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_max_alarm_read(dev, val);
+ case EMC2101_TC_INT:
+ return emc2101_temp_int_max_alarm_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_min:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_min_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_min_alarm:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_min_alarm_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_type:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_type_read(dev, val);
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+};
+
+static int emc2101_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
+ int channel, const char **str)
+{
+ switch (type) {
+ case hwmon_temp:
+ switch (attr) {
+ case hwmon_temp_label:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ *str = "external";
+ return 0;
+ case EMC2101_TC_FORCE:
+ *str = "force";
+ return 0;
+ case EMC2101_TC_INT:
+ *str = "internal";
+ return 0;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+};
+
+static int emc2101_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
+ long val)
+{
+ switch (type) {
+ case hwmon_chip:
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ return emc2101_chip_update_interval_write(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_div:
+ return emc2101_fan_div_write(dev, val);
+ case hwmon_fan_min:
+ return emc2101_fan_min_write(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_auto_channels_temp:
+ return emc2101_pwm_auto_channels_temp_write(dev, val);
+ case hwmon_pwm_enable:
+ return emc2101_pwm_enable_write(dev, val);
+ case hwmon_pwm_freq:
+ return emc2101_pwm_freq_write(dev, val);
+ case hwmon_pwm_input:
+ return emc2101_pwm_input_write(dev, val);
+ case hwmon_pwm_mode:
+ return emc2101_pwm_mode_write(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp:
+ switch (attr) {
+ case hwmon_temp_crit:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_crit_write(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_crit_hyst:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_crit_hyst_write(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_max:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_max_write(dev, val);
+ case EMC2101_TC_INT:
+ return emc2101_temp_int_max_write(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_min:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_min_write(dev, val);
+ default:
+ break;
+ }
+ break;
+ case hwmon_temp_type:
+ switch (channel) {
+ case EMC2101_TC_EXT:
+ return emc2101_temp_ext_type_write(dev, val);
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+#define EMC2101_CHIP_CFG HWMON_C_UPDATE_INTERVAL
+#define EMC2101_FAN_CFG (HWMON_F_DIV |\
+ HWMON_F_INPUT |\
+ HWMON_F_MIN |\
+ HWMON_F_MIN_ALARM)
+#define EMC2101_PWM_CFG (HWMON_PWM_AUTO_CHANNELS_TEMP |\
+ HWMON_PWM_ENABLE |\
+ HWMON_PWM_FREQ |\
+ HWMON_PWM_INPUT |\
+ HWMON_PWM_MODE)
+#define EMC2101_TEMP_INT_CFG (HWMON_T_INPUT |\
+ HWMON_T_LABEL |\
+ HWMON_T_MAX |\
+ HWMON_T_MAX_ALARM)
+#define EMC2101_TEMP_EXT_CFG (HWMON_T_CRIT |\
+ HWMON_T_CRIT_ALARM |\
+ HWMON_T_CRIT_HYST |\
+ HWMON_T_FAULT |\
+ HWMON_T_INPUT |\
+ HWMON_T_LABEL |\
+ HWMON_T_MAX |\
+ HWMON_T_MAX_ALARM |\
+ HWMON_T_MIN |\
+ HWMON_T_MIN_ALARM |\
+ HWMON_T_TYPE)
+#define EMC2101_TEMP_FORCE_CFG HWMON_T_LABEL
+
+static const struct hwmon_channel_info * const emc2101_info[] = {
+ HWMON_CHANNEL_INFO(chip, EMC2101_CHIP_CFG),
+ HWMON_CHANNEL_INFO(fan, EMC2101_FAN_CFG),
+ HWMON_CHANNEL_INFO(pwm, EMC2101_PWM_CFG),
+ HWMON_CHANNEL_INFO(temp, EMC2101_TEMP_INT_CFG,
+ EMC2101_TEMP_EXT_CFG,
+ EMC2101_TEMP_FORCE_CFG),
+ NULL
+};
+
+static const struct hwmon_ops emc2101_ops = {
+ .is_visible = emc2101_is_visible,
+ .read = emc2101_read,
+ .read_string = emc2101_read_string,
+ .write = emc2101_write,
+};
+
+static const struct hwmon_chip_info emc2101_chip_info = {
+ .info = emc2101_info,
+ .ops = &emc2101_ops,
+};
+
+static int emc2101_resume(struct device *dev)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return regmap_field_write(data->fields[F_STBY_MODE], 0);
+}
+
+static int emc2101_suspend(struct device *dev)
+{
+ struct emc2101_data *data = dev_get_drvdata(dev);
+
+ return regmap_field_write(data->fields[F_STBY_MODE], 1);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(emc2101_pm, emc2101_suspend, emc2101_resume);
+
+static int emc2101_init(struct emc2101_data *data)
+{
+ static const u8 lut_t[FAN_LUT_COUNT] = { 35, 40, 45, 50, 55, 60, 70, 75};
+ static const u8 lut_s[FAN_LUT_COUNT] = {0x12, 0x19, 0x1f, 0x25, 0x2c, 0x32, 0x38, 0x3f};
+ unsigned int i;
+ u16 tach_count;
+ int ret;
+
+ /* CONFIG */
+ ret = regmap_field_write(data->fields[F_PIN_FUNC_TACH], 1);
+ if (ret)
+ return ret;
+ ret = regmap_field_write(data->fields[F_SMBUS_TOUT_DISABLE], 1);
+ if (ret)
+ return ret;
+
+ /* FAN_CONFIG */
+ ret = regmap_field_write(data->fields[F_TACH_FALSE_READ], TACH_FALSE_READ_DISABLE);
+ if (ret)
+ return ret;
+ ret = regmap_field_write(data->fields[F_FAN_CLK_OVR], 1);
+ if (ret)
+ return ret;
+ ret = regmap_field_write(data->fields[F_FAN_CLK_SEL], 0);
+ if (ret)
+ return ret;
+
+ /* FAN_LUT */
+ ret = regmap_field_write(data->fields[F_FAN_LUT_DISABLE], 1);
+ if (ret)
+ return ret;
+ for (i = 0; i < FAN_LUT_COUNT; i++) {
+ ret = regmap_field_write(data->fields[F_FAN_LUT_TEMP(i)], lut_t[i]);
+ if (ret)
+ return ret;
+ ret = regmap_field_write(data->fields[F_FAN_LUT_SPEED(i)], lut_s[i]);
+ if (ret)
+ return ret;
+ }
+ ret = regmap_field_write(data->fields[F_FAN_LUT_DISABLE], 0);
+ if (ret)
+ return ret;
+
+ /* PWM_FREQ */
+ ret = regmap_field_write(data->fields[F_PWM_FREQ], PWM_FREQ_MASK);
+ if (ret)
+ return ret;
+ ret = regmap_field_write(data->fields[F_PWM_FREQ_DIV], 1);
+ if (ret)
+ return ret;
+
+ /* TACH gives invalid value on first reading */
+ return emc2101_read_u16(data, regs_tach, &tach_count);
+}
+
+static bool emc2101_regmap_is_volatile(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case REG_TEMP_INT: /* internal diode */
+ case REG_TEMP_EXT_HI: /* external diode high byte */
+ case REG_STATUS: /* status */
+ case REG_TEMP_EXT_LO: /* external diode low byte */
+ case REG_TACH_LO: /* tach input low byte */
+ case REG_TACH_HI: /* tach input high byte */
+ case REG_FAN_SET: /* fan pwm */
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config emc2101_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .cache_type = REGCACHE_MAPLE,
+ .volatile_reg = emc2101_regmap_is_volatile,
+};
+
+static int emc2101_probe(struct i2c_client *client)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ struct device *dev = &client->dev;
+ struct emc2101_data *data;
+ struct device *hwmon_dev;
+ unsigned int i;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ data = devm_kzalloc(dev, sizeof(struct emc2101_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->regmap = devm_regmap_init_i2c(client, &emc2101_regmap_config);
+ if (IS_ERR(data->regmap))
+ return PTR_ERR(data->regmap);
+
+ for (i = 0; i < F_MAX_FIELDS; i++) {
+ data->fields[i] = devm_regmap_field_alloc(dev, data->regmap,
+ emc2101_reg_fields[i]);
+ if (IS_ERR(data->fields[i])) {
+ dev_err(dev, "Unable to allocate regmap fields\n");
+ return PTR_ERR(data->fields[i]);
+ }
+ }
+
+ data->dev = dev;
+ mutex_init(&data->mutex);
+
+ hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data,
+ &emc2101_chip_info,
+ emc2101_hwmon_groups);
+ if (IS_ERR(hwmon_dev))
+ return PTR_ERR(hwmon_dev);
+
+ dev_dbg(dev, "%s: sensor '%s'\n", dev_name(hwmon_dev), client->name);
+
+ return emc2101_init(data);
+}
+
+static int emc2101_detect(struct i2c_client *client, struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ s32 manufacturer, product, revision;
+ struct device *dev = &adapter->dev;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ manufacturer = i2c_smbus_read_byte_data(client, REG_MANUFACTURER_ID);
+ if (manufacturer != MANUFACTURER_ID)
+ return -ENODEV;
+
+ product = i2c_smbus_read_byte_data(client, REG_PRODUCT_ID);
+ switch (product) {
+ case EMC2101:
+ strscpy(info->type, "emc2101", I2C_NAME_SIZE);
+ break;
+ case EMC2101_R:
+ strscpy(info->type, "emc2101-r", I2C_NAME_SIZE);
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ revision = i2c_smbus_read_byte_data(client, REG_REVISION);
+
+ dev_dbg(dev, "Found %s at 0x%02x (rev 0x%02x).\n", info->type, client->addr, revision);
+
+ return 0;
+}
+
+static const struct i2c_device_id emc2101_ids[] = {
+ { "emc2101" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, emc2101_ids);
+
+static const struct of_device_id emc2101_of_match_table[] = {
+ { .compatible = "microchip,emc2101", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, emc2101_of_match_table);
+
+static const unsigned short emc2101_address_list[] = {
+ 0x4c, I2C_CLIENT_END
+};
+
+static struct i2c_driver emc2101_driver = {
+ .address_list = emc2101_address_list,
+ .class = I2C_CLASS_HWMON,
+ .detect = emc2101_detect,
+ .driver = {
+ .name = "emc2101",
+ .of_match_table = emc2101_of_match_table,
+ .pm = pm_sleep_ptr(&emc2101_pm),
+ },
+ .id_table = emc2101_ids,
+ .probe = emc2101_probe,
+};
+module_i2c_driver(emc2101_driver);
+
+MODULE_AUTHOR("Álvaro Fernández Rojas <noltari@xxxxxxxxx>");
+MODULE_DESCRIPTION("Microchip EMC2101 hwmon driver");
+MODULE_LICENSE("GPL");
--
2.39.5
