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830 lines
19 KiB
830 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* max6650.c - Part of lm_sensors, Linux kernel modules for hardware |
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* monitoring. |
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* |
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* (C) 2007 by Hans J. Koch <[email protected]> |
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* |
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* based on code written by John Morris <[email protected]> |
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* Copyright (c) 2003 Spirent Communications |
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* and Claus Gindhart <[email protected]> |
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* |
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* This module has only been tested with the MAX6650 chip. It should |
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* also work with the MAX6651. It does not distinguish max6650 and max6651 |
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* chips. |
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* |
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* The datasheet was last seen at: |
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* |
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* http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf |
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*/ |
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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/of_device.h> |
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#include <linux/thermal.h> |
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|
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/* |
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* Insmod parameters |
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*/ |
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|
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/* fan_voltage: 5=5V fan, 12=12V fan, 0=don't change */ |
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static int fan_voltage; |
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/* prescaler: Possible values are 1, 2, 4, 8, 16 or 0 for don't change */ |
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static int prescaler; |
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/* clock: The clock frequency of the chip (max6651 can be clocked externally) */ |
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static int clock = 254000; |
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|
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module_param(fan_voltage, int, 0444); |
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module_param(prescaler, int, 0444); |
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module_param(clock, int, 0444); |
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|
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/* |
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* MAX 6650/6651 registers |
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*/ |
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|
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#define MAX6650_REG_SPEED 0x00 |
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#define MAX6650_REG_CONFIG 0x02 |
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#define MAX6650_REG_GPIO_DEF 0x04 |
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#define MAX6650_REG_DAC 0x06 |
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#define MAX6650_REG_ALARM_EN 0x08 |
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#define MAX6650_REG_ALARM 0x0A |
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#define MAX6650_REG_TACH0 0x0C |
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#define MAX6650_REG_TACH1 0x0E |
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#define MAX6650_REG_TACH2 0x10 |
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#define MAX6650_REG_TACH3 0x12 |
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#define MAX6650_REG_GPIO_STAT 0x14 |
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#define MAX6650_REG_COUNT 0x16 |
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|
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/* |
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* Config register bits |
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*/ |
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|
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#define MAX6650_CFG_V12 0x08 |
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#define MAX6650_CFG_PRESCALER_MASK 0x07 |
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#define MAX6650_CFG_PRESCALER_2 0x01 |
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#define MAX6650_CFG_PRESCALER_4 0x02 |
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#define MAX6650_CFG_PRESCALER_8 0x03 |
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#define MAX6650_CFG_PRESCALER_16 0x04 |
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#define MAX6650_CFG_MODE_MASK 0x30 |
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#define MAX6650_CFG_MODE_ON 0x00 |
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#define MAX6650_CFG_MODE_OFF 0x10 |
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#define MAX6650_CFG_MODE_CLOSED_LOOP 0x20 |
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#define MAX6650_CFG_MODE_OPEN_LOOP 0x30 |
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#define MAX6650_COUNT_MASK 0x03 |
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|
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/* |
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* Alarm status register bits |
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*/ |
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|
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#define MAX6650_ALRM_MAX 0x01 |
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#define MAX6650_ALRM_MIN 0x02 |
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#define MAX6650_ALRM_TACH 0x04 |
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#define MAX6650_ALRM_GPIO1 0x08 |
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#define MAX6650_ALRM_GPIO2 0x10 |
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|
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/* Minimum and maximum values of the FAN-RPM */ |
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#define FAN_RPM_MIN 240 |
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#define FAN_RPM_MAX 30000 |
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|
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#define DIV_FROM_REG(reg) (1 << ((reg) & 7)) |
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#define DAC_LIMIT(v12) ((v12) ? 180 : 76) |
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|
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/* |
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* Client data (each client gets its own) |
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*/ |
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|
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struct max6650_data { |
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struct i2c_client *client; |
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struct mutex update_lock; /* protect alarm register updates */ |
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int nr_fans; |
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bool valid; /* false until following fields are valid */ |
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unsigned long last_updated; /* in jiffies */ |
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|
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/* register values */ |
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u8 speed; |
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u8 config; |
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u8 tach[4]; |
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u8 count; |
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u8 dac; |
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u8 alarm; |
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u8 alarm_en; |
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unsigned long cooling_dev_state; |
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}; |
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|
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static const u8 tach_reg[] = { |
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MAX6650_REG_TACH0, |
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MAX6650_REG_TACH1, |
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MAX6650_REG_TACH2, |
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MAX6650_REG_TACH3, |
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}; |
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static const struct of_device_id __maybe_unused max6650_dt_match[] = { |
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{ |
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.compatible = "maxim,max6650", |
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.data = (void *)1 |
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}, |
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{ |
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.compatible = "maxim,max6651", |
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.data = (void *)4 |
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}, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, max6650_dt_match); |
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|
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static int dac_to_pwm(int dac, bool v12) |
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{ |
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/* |
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* Useful range for dac is 0-180 for 12V fans and 0-76 for 5V fans. |
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* Lower DAC values mean higher speeds. |
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*/ |
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return clamp_val(255 - (255 * dac) / DAC_LIMIT(v12), 0, 255); |
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} |
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|
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static u8 pwm_to_dac(unsigned int pwm, bool v12) |
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{ |
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int limit = DAC_LIMIT(v12); |
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return limit - (limit * pwm) / 255; |
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} |
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|
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static struct max6650_data *max6650_update_device(struct device *dev) |
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{ |
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struct max6650_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int reg, err = 0; |
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int i; |
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mutex_lock(&data->update_lock); |
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if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { |
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for (i = 0; i < data->nr_fans; i++) { |
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reg = i2c_smbus_read_byte_data(client, tach_reg[i]); |
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if (reg < 0) { |
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err = reg; |
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goto error; |
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} |
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data->tach[i] = reg; |
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} |
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|
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/* |
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* Alarms are cleared on read in case the condition that |
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* caused the alarm is removed. Keep the value latched here |
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* for providing the register through different alarm files. |
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*/ |
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reg = i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM); |
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if (reg < 0) { |
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err = reg; |
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goto error; |
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} |
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data->alarm |= reg; |
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data->last_updated = jiffies; |
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data->valid = true; |
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} |
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error: |
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mutex_unlock(&data->update_lock); |
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if (err) |
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data = ERR_PTR(err); |
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return data; |
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} |
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/* |
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* Change the operating mode of the chip (if needed). |
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* mode is one of the MAX6650_CFG_MODE_* values. |
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*/ |
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static int max6650_set_operating_mode(struct max6650_data *data, u8 mode) |
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{ |
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int result; |
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u8 config = data->config; |
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if (mode == (config & MAX6650_CFG_MODE_MASK)) |
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return 0; |
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config = (config & ~MAX6650_CFG_MODE_MASK) | mode; |
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result = i2c_smbus_write_byte_data(data->client, MAX6650_REG_CONFIG, |
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config); |
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if (result < 0) |
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return result; |
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data->config = config; |
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return 0; |
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} |
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/* |
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* Set the fan speed to the specified RPM (or read back the RPM setting). |
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* This works in closed loop mode only. Use pwm1 for open loop speed setting. |
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* |
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* The MAX6650/1 will automatically control fan speed when in closed loop |
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* mode. |
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* |
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* Assumptions: |
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* |
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* 1) The MAX6650/1 internal 254kHz clock frequency is set correctly. Use |
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* the clock module parameter if you need to fine tune this. |
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* |
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* 2) The prescaler (low three bits of the config register) has already |
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* been set to an appropriate value. Use the prescaler module parameter |
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* if your BIOS doesn't initialize the chip properly. |
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* |
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* The relevant equations are given on pages 21 and 22 of the datasheet. |
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* |
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* From the datasheet, the relevant equation when in regulation is: |
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* |
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* [fCLK / (128 x (KTACH + 1))] = 2 x FanSpeed / KSCALE |
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* |
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* where: |
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* |
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* fCLK is the oscillator frequency (either the 254kHz internal |
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* oscillator or the externally applied clock) |
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* |
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* KTACH is the value in the speed register |
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* |
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* FanSpeed is the speed of the fan in rps |
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* |
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* KSCALE is the prescaler value (1, 2, 4, 8, or 16) |
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* |
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* When reading, we need to solve for FanSpeed. When writing, we need to |
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* solve for KTACH. |
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* |
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* Note: this tachometer is completely separate from the tachometers |
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* used to measure the fan speeds. Only one fan's speed (fan1) is |
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* controlled. |
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*/ |
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static int max6650_set_target(struct max6650_data *data, unsigned long rpm) |
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{ |
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int kscale, ktach; |
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if (rpm == 0) |
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return max6650_set_operating_mode(data, MAX6650_CFG_MODE_OFF); |
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rpm = clamp_val(rpm, FAN_RPM_MIN, FAN_RPM_MAX); |
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/* |
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* Divide the required speed by 60 to get from rpm to rps, then |
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* use the datasheet equation: |
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* |
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* KTACH = [(fCLK x KSCALE) / (256 x FanSpeed)] - 1 |
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*/ |
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kscale = DIV_FROM_REG(data->config); |
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ktach = ((clock * kscale) / (256 * rpm / 60)) - 1; |
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if (ktach < 0) |
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ktach = 0; |
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if (ktach > 255) |
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ktach = 255; |
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data->speed = ktach; |
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return i2c_smbus_write_byte_data(data->client, MAX6650_REG_SPEED, |
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data->speed); |
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} |
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/* |
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* Get gpio alarm status: |
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* Possible values: |
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* 0 = no alarm |
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* 1 = alarm |
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*/ |
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static ssize_t alarm_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct max6650_data *data = max6650_update_device(dev); |
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bool alarm; |
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if (IS_ERR(data)) |
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return PTR_ERR(data); |
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alarm = data->alarm & attr->index; |
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if (alarm) { |
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mutex_lock(&data->update_lock); |
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data->alarm &= ~attr->index; |
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data->valid = false; |
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mutex_unlock(&data->update_lock); |
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} |
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return sprintf(buf, "%d\n", alarm); |
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} |
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static SENSOR_DEVICE_ATTR_RO(gpio1_alarm, alarm, MAX6650_ALRM_GPIO1); |
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static SENSOR_DEVICE_ATTR_RO(gpio2_alarm, alarm, MAX6650_ALRM_GPIO2); |
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static umode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a, |
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int n) |
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{ |
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struct device *dev = kobj_to_dev(kobj); |
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struct max6650_data *data = dev_get_drvdata(dev); |
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struct device_attribute *devattr; |
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/* |
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* Hide the alarms that have not been enabled by the firmware |
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*/ |
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devattr = container_of(a, struct device_attribute, attr); |
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if (devattr == &sensor_dev_attr_gpio1_alarm.dev_attr || |
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devattr == &sensor_dev_attr_gpio2_alarm.dev_attr) { |
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if (!(data->alarm_en & to_sensor_dev_attr(devattr)->index)) |
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return 0; |
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} |
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return a->mode; |
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} |
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static struct attribute *max6650_attrs[] = { |
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&sensor_dev_attr_gpio1_alarm.dev_attr.attr, |
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&sensor_dev_attr_gpio2_alarm.dev_attr.attr, |
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NULL |
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}; |
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static const struct attribute_group max6650_group = { |
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.attrs = max6650_attrs, |
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.is_visible = max6650_attrs_visible, |
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}; |
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static const struct attribute_group *max6650_groups[] = { |
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&max6650_group, |
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NULL |
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}; |
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static int max6650_init_client(struct max6650_data *data, |
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struct i2c_client *client) |
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{ |
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struct device *dev = &client->dev; |
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int reg; |
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int err; |
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u32 voltage; |
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u32 prescale; |
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u32 target_rpm; |
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|
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if (of_property_read_u32(dev->of_node, "maxim,fan-microvolt", |
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&voltage)) |
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voltage = fan_voltage; |
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else |
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voltage /= 1000000; /* Microvolts to volts */ |
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if (of_property_read_u32(dev->of_node, "maxim,fan-prescale", |
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&prescale)) |
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prescale = prescaler; |
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reg = i2c_smbus_read_byte_data(client, MAX6650_REG_CONFIG); |
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if (reg < 0) { |
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dev_err(dev, "Error reading config register, aborting.\n"); |
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return reg; |
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} |
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switch (voltage) { |
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case 0: |
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break; |
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case 5: |
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reg &= ~MAX6650_CFG_V12; |
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break; |
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case 12: |
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reg |= MAX6650_CFG_V12; |
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break; |
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default: |
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dev_err(dev, "illegal value for fan_voltage (%d)\n", voltage); |
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} |
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switch (prescale) { |
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case 0: |
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break; |
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case 1: |
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reg &= ~MAX6650_CFG_PRESCALER_MASK; |
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break; |
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case 2: |
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reg = (reg & ~MAX6650_CFG_PRESCALER_MASK) |
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| MAX6650_CFG_PRESCALER_2; |
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break; |
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case 4: |
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reg = (reg & ~MAX6650_CFG_PRESCALER_MASK) |
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| MAX6650_CFG_PRESCALER_4; |
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break; |
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case 8: |
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reg = (reg & ~MAX6650_CFG_PRESCALER_MASK) |
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| MAX6650_CFG_PRESCALER_8; |
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break; |
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case 16: |
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reg = (reg & ~MAX6650_CFG_PRESCALER_MASK) |
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| MAX6650_CFG_PRESCALER_16; |
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break; |
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default: |
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dev_err(dev, "illegal value for prescaler (%d)\n", prescale); |
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} |
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dev_info(dev, "Fan voltage: %dV, prescaler: %d.\n", |
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(reg & MAX6650_CFG_V12) ? 12 : 5, |
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1 << (reg & MAX6650_CFG_PRESCALER_MASK)); |
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|
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err = i2c_smbus_write_byte_data(client, MAX6650_REG_CONFIG, reg); |
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if (err) { |
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dev_err(dev, "Config write error, aborting.\n"); |
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return err; |
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} |
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data->config = reg; |
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reg = i2c_smbus_read_byte_data(client, MAX6650_REG_SPEED); |
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if (reg < 0) { |
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dev_err(dev, "Failed to read speed register, aborting.\n"); |
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return reg; |
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} |
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data->speed = reg; |
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reg = i2c_smbus_read_byte_data(client, MAX6650_REG_DAC); |
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if (reg < 0) { |
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dev_err(dev, "Failed to read DAC register, aborting.\n"); |
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return reg; |
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} |
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data->dac = reg; |
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reg = i2c_smbus_read_byte_data(client, MAX6650_REG_COUNT); |
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if (reg < 0) { |
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dev_err(dev, "Failed to read count register, aborting.\n"); |
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return reg; |
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} |
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data->count = reg; |
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reg = i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM_EN); |
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if (reg < 0) { |
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dev_err(dev, "Failed to read alarm configuration, aborting.\n"); |
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return reg; |
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} |
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data->alarm_en = reg; |
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|
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if (!of_property_read_u32(client->dev.of_node, "maxim,fan-target-rpm", |
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&target_rpm)) { |
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max6650_set_target(data, target_rpm); |
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max6650_set_operating_mode(data, MAX6650_CFG_MODE_CLOSED_LOOP); |
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} |
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|
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return 0; |
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} |
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|
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static int max6650_get_max_state(struct thermal_cooling_device *cdev, |
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unsigned long *state) |
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{ |
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*state = 255; |
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|
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return 0; |
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} |
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|
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static int max6650_get_cur_state(struct thermal_cooling_device *cdev, |
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unsigned long *state) |
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{ |
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struct max6650_data *data = cdev->devdata; |
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|
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*state = data->cooling_dev_state; |
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|
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return 0; |
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} |
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static int max6650_set_cur_state(struct thermal_cooling_device *cdev, |
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unsigned long state) |
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{ |
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struct max6650_data *data = cdev->devdata; |
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struct i2c_client *client = data->client; |
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int err; |
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|
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state = clamp_val(state, 0, 255); |
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|
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mutex_lock(&data->update_lock); |
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|
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data->dac = pwm_to_dac(state, data->config & MAX6650_CFG_V12); |
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err = i2c_smbus_write_byte_data(client, MAX6650_REG_DAC, data->dac); |
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if (!err) { |
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max6650_set_operating_mode(data, state ? |
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MAX6650_CFG_MODE_OPEN_LOOP : |
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MAX6650_CFG_MODE_OFF); |
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data->cooling_dev_state = state; |
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} |
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|
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mutex_unlock(&data->update_lock); |
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|
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return err; |
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} |
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|
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static const struct thermal_cooling_device_ops max6650_cooling_ops = { |
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.get_max_state = max6650_get_max_state, |
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.get_cur_state = max6650_get_cur_state, |
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.set_cur_state = max6650_set_cur_state, |
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}; |
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|
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static int max6650_read(struct device *dev, enum hwmon_sensor_types type, |
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u32 attr, int channel, long *val) |
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{ |
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struct max6650_data *data = max6650_update_device(dev); |
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int mode; |
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|
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if (IS_ERR(data)) |
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return PTR_ERR(data); |
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|
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switch (type) { |
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case hwmon_pwm: |
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switch (attr) { |
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case hwmon_pwm_input: |
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*val = dac_to_pwm(data->dac, |
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data->config & MAX6650_CFG_V12); |
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break; |
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case hwmon_pwm_enable: |
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/* |
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* Possible values: |
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* 0 = Fan always on |
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* 1 = Open loop, Voltage is set according to speed, |
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* not regulated. |
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* 2 = Closed loop, RPM for all fans regulated by fan1 |
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* tachometer |
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* 3 = Fan off |
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*/ |
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mode = (data->config & MAX6650_CFG_MODE_MASK) >> 4; |
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*val = (4 - mode) & 3; /* {0 1 2 3} -> {0 3 2 1} */ |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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break; |
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case hwmon_fan: |
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switch (attr) { |
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case hwmon_fan_input: |
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/* |
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* Calculation details: |
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* |
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* Each tachometer counts over an interval given by the |
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* "count" register (0.25, 0.5, 1 or 2 seconds). |
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* The driver assumes that the fans produce two pulses |
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* per revolution (this seems to be the most common). |
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*/ |
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*val = DIV_ROUND_CLOSEST(data->tach[channel] * 120, |
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DIV_FROM_REG(data->count)); |
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break; |
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case hwmon_fan_div: |
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*val = DIV_FROM_REG(data->count); |
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break; |
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case hwmon_fan_target: |
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/* |
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* Use the datasheet equation: |
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* FanSpeed = KSCALE x fCLK / [256 x (KTACH + 1)] |
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* then multiply by 60 to give rpm. |
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*/ |
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*val = 60 * DIV_FROM_REG(data->config) * clock / |
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(256 * (data->speed + 1)); |
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break; |
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case hwmon_fan_min_alarm: |
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*val = !!(data->alarm & MAX6650_ALRM_MIN); |
|
data->alarm &= ~MAX6650_ALRM_MIN; |
|
data->valid = false; |
|
break; |
|
case hwmon_fan_max_alarm: |
|
*val = !!(data->alarm & MAX6650_ALRM_MAX); |
|
data->alarm &= ~MAX6650_ALRM_MAX; |
|
data->valid = false; |
|
break; |
|
case hwmon_fan_fault: |
|
*val = !!(data->alarm & MAX6650_ALRM_TACH); |
|
data->alarm &= ~MAX6650_ALRM_TACH; |
|
data->valid = false; |
|
break; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
break; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
return 0; |
|
} |
|
|
|
static const u8 max6650_pwm_modes[] = { |
|
MAX6650_CFG_MODE_ON, |
|
MAX6650_CFG_MODE_OPEN_LOOP, |
|
MAX6650_CFG_MODE_CLOSED_LOOP, |
|
MAX6650_CFG_MODE_OFF, |
|
}; |
|
|
|
static int max6650_write(struct device *dev, enum hwmon_sensor_types type, |
|
u32 attr, int channel, long val) |
|
{ |
|
struct max6650_data *data = dev_get_drvdata(dev); |
|
int ret = 0; |
|
u8 reg; |
|
|
|
mutex_lock(&data->update_lock); |
|
|
|
switch (type) { |
|
case hwmon_pwm: |
|
switch (attr) { |
|
case hwmon_pwm_input: |
|
reg = pwm_to_dac(clamp_val(val, 0, 255), |
|
data->config & MAX6650_CFG_V12); |
|
ret = i2c_smbus_write_byte_data(data->client, |
|
MAX6650_REG_DAC, reg); |
|
if (ret) |
|
break; |
|
data->dac = reg; |
|
break; |
|
case hwmon_pwm_enable: |
|
if (val < 0 || val >= ARRAY_SIZE(max6650_pwm_modes)) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
ret = max6650_set_operating_mode(data, |
|
max6650_pwm_modes[val]); |
|
break; |
|
default: |
|
ret = -EOPNOTSUPP; |
|
break; |
|
} |
|
break; |
|
case hwmon_fan: |
|
switch (attr) { |
|
case hwmon_fan_div: |
|
switch (val) { |
|
case 1: |
|
reg = 0; |
|
break; |
|
case 2: |
|
reg = 1; |
|
break; |
|
case 4: |
|
reg = 2; |
|
break; |
|
case 8: |
|
reg = 3; |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
goto error; |
|
} |
|
ret = i2c_smbus_write_byte_data(data->client, |
|
MAX6650_REG_COUNT, reg); |
|
if (ret) |
|
break; |
|
data->count = reg; |
|
break; |
|
case hwmon_fan_target: |
|
if (val < 0) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
ret = max6650_set_target(data, val); |
|
break; |
|
default: |
|
ret = -EOPNOTSUPP; |
|
break; |
|
} |
|
break; |
|
default: |
|
ret = -EOPNOTSUPP; |
|
break; |
|
} |
|
|
|
error: |
|
mutex_unlock(&data->update_lock); |
|
return ret; |
|
} |
|
|
|
static umode_t max6650_is_visible(const void *_data, |
|
enum hwmon_sensor_types type, u32 attr, |
|
int channel) |
|
{ |
|
const struct max6650_data *data = _data; |
|
|
|
if (channel && (channel >= data->nr_fans || type != hwmon_fan)) |
|
return 0; |
|
|
|
switch (type) { |
|
case hwmon_fan: |
|
switch (attr) { |
|
case hwmon_fan_input: |
|
return 0444; |
|
case hwmon_fan_target: |
|
case hwmon_fan_div: |
|
return 0644; |
|
case hwmon_fan_min_alarm: |
|
if (data->alarm_en & MAX6650_ALRM_MIN) |
|
return 0444; |
|
break; |
|
case hwmon_fan_max_alarm: |
|
if (data->alarm_en & MAX6650_ALRM_MAX) |
|
return 0444; |
|
break; |
|
case hwmon_fan_fault: |
|
if (data->alarm_en & MAX6650_ALRM_TACH) |
|
return 0444; |
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_pwm: |
|
switch (attr) { |
|
case hwmon_pwm_input: |
|
case hwmon_pwm_enable: |
|
return 0644; |
|
default: |
|
break; |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
return 0; |
|
} |
|
|
|
static const struct hwmon_channel_info *max6650_info[] = { |
|
HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV | |
|
HWMON_F_MIN_ALARM | HWMON_F_MAX_ALARM | |
|
HWMON_F_FAULT, |
|
HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT), |
|
HWMON_CHANNEL_INFO(pwm, HWMON_PWM_INPUT | HWMON_PWM_ENABLE), |
|
NULL |
|
}; |
|
|
|
static const struct hwmon_ops max6650_hwmon_ops = { |
|
.read = max6650_read, |
|
.write = max6650_write, |
|
.is_visible = max6650_is_visible, |
|
}; |
|
|
|
static const struct hwmon_chip_info max6650_chip_info = { |
|
.ops = &max6650_hwmon_ops, |
|
.info = max6650_info, |
|
}; |
|
|
|
static const struct i2c_device_id max6650_id[]; |
|
|
|
static int max6650_probe(struct i2c_client *client) |
|
{ |
|
struct thermal_cooling_device *cooling_dev; |
|
struct device *dev = &client->dev; |
|
const struct of_device_id *of_id = |
|
of_match_device(of_match_ptr(max6650_dt_match), dev); |
|
struct max6650_data *data; |
|
struct device *hwmon_dev; |
|
int err; |
|
|
|
data = devm_kzalloc(dev, sizeof(struct max6650_data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->client = client; |
|
i2c_set_clientdata(client, data); |
|
mutex_init(&data->update_lock); |
|
data->nr_fans = of_id ? (int)(uintptr_t)of_id->data : |
|
i2c_match_id(max6650_id, client)->driver_data; |
|
|
|
/* |
|
* Initialize the max6650 chip |
|
*/ |
|
err = max6650_init_client(data, client); |
|
if (err) |
|
return err; |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_info(dev, |
|
client->name, data, |
|
&max6650_chip_info, |
|
max6650_groups); |
|
err = PTR_ERR_OR_ZERO(hwmon_dev); |
|
if (err) |
|
return err; |
|
|
|
if (IS_ENABLED(CONFIG_THERMAL)) { |
|
cooling_dev = devm_thermal_of_cooling_device_register(dev, |
|
dev->of_node, client->name, |
|
data, &max6650_cooling_ops); |
|
if (IS_ERR(cooling_dev)) { |
|
dev_warn(dev, "thermal cooling device register failed: %ld\n", |
|
PTR_ERR(cooling_dev)); |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id max6650_id[] = { |
|
{ "max6650", 1 }, |
|
{ "max6651", 4 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, max6650_id); |
|
|
|
static struct i2c_driver max6650_driver = { |
|
.driver = { |
|
.name = "max6650", |
|
.of_match_table = of_match_ptr(max6650_dt_match), |
|
}, |
|
.probe_new = max6650_probe, |
|
.id_table = max6650_id, |
|
}; |
|
|
|
module_i2c_driver(max6650_driver); |
|
|
|
MODULE_AUTHOR("Hans J. Koch"); |
|
MODULE_DESCRIPTION("MAX6650 sensor driver"); |
|
MODULE_LICENSE("GPL");
|
|
|