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667 lines
20 KiB
667 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware |
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* monitoring |
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* Copyright (C) 1998, 1999 Frodo Looijaard <[email protected]> and |
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* Kyosti Malkki <[email protected]> |
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* Copyright (C) 2004 Hong-Gunn Chew <[email protected]> and |
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* Jean Delvare <[email protected]> |
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* |
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* Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare |
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* and advice of Greg Kroah-Hartman. |
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* |
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* Notes about the port: |
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* Release 0x00 of the GL518SM chipset doesn't support reading of in0, |
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* in1 nor in2. The original driver had an ugly workaround to get them |
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* anyway (changing limits and watching alarms trigger and wear off). |
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* We did not keep that part of the original driver in the Linux 2.6 |
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* version, since it was making the driver significantly more complex |
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* with no real benefit. |
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*/ |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/jiffies.h> |
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#include <linux/i2c.h> |
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#include <linux/hwmon.h> |
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#include <linux/hwmon-sysfs.h> |
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#include <linux/err.h> |
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#include <linux/mutex.h> |
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#include <linux/sysfs.h> |
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/* Addresses to scan */ |
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; |
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enum chips { gl518sm_r00, gl518sm_r80 }; |
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/* Many GL518 constants specified below */ |
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/* The GL518 registers */ |
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#define GL518_REG_CHIP_ID 0x00 |
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#define GL518_REG_REVISION 0x01 |
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#define GL518_REG_VENDOR_ID 0x02 |
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#define GL518_REG_CONF 0x03 |
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#define GL518_REG_TEMP_IN 0x04 |
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#define GL518_REG_TEMP_MAX 0x05 |
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#define GL518_REG_TEMP_HYST 0x06 |
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#define GL518_REG_FAN_COUNT 0x07 |
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#define GL518_REG_FAN_LIMIT 0x08 |
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#define GL518_REG_VIN1_LIMIT 0x09 |
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#define GL518_REG_VIN2_LIMIT 0x0a |
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#define GL518_REG_VIN3_LIMIT 0x0b |
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#define GL518_REG_VDD_LIMIT 0x0c |
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#define GL518_REG_VIN3 0x0d |
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#define GL518_REG_MISC 0x0f |
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#define GL518_REG_ALARM 0x10 |
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#define GL518_REG_MASK 0x11 |
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#define GL518_REG_INT 0x12 |
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#define GL518_REG_VIN2 0x13 |
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#define GL518_REG_VIN1 0x14 |
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#define GL518_REG_VDD 0x15 |
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/* |
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* Conversions. Rounding and limit checking is only done on the TO_REG |
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* variants. Note that you should be a bit careful with which arguments |
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* these macros are called: arguments may be evaluated more than once. |
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* Fixing this is just not worth it. |
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*/ |
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#define RAW_FROM_REG(val) val |
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#define BOOL_FROM_REG(val) ((val) ? 0 : 1) |
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#define BOOL_TO_REG(val) ((val) ? 0 : 1) |
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#define TEMP_CLAMP(val) clamp_val(val, -119000, 136000) |
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#define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 119) |
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#define TEMP_FROM_REG(val) (((val) - 119) * 1000) |
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static inline u8 FAN_TO_REG(long rpm, int div) |
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{ |
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long rpmdiv; |
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if (rpm == 0) |
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return 0; |
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rpmdiv = clamp_val(rpm, 1, 960000) * div; |
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return clamp_val((480000 + rpmdiv / 2) / rpmdiv, 1, 255); |
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} |
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#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) * (div)))) |
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#define IN_CLAMP(val) clamp_val(val, 0, 255 * 19) |
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#define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19) |
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#define IN_FROM_REG(val) ((val) * 19) |
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#define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4) |
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#define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95) |
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#define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4) |
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#define DIV_FROM_REG(val) (1 << (val)) |
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#define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask) |
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#define BEEP_MASK_FROM_REG(val) ((val) & 0x7f) |
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/* Each client has this additional data */ |
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struct gl518_data { |
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struct i2c_client *client; |
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const struct attribute_group *groups[3]; |
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enum chips type; |
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struct mutex update_lock; |
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char valid; /* !=0 if following fields are valid */ |
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unsigned long last_updated; /* In jiffies */ |
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u8 voltage_in[4]; /* Register values; [0] = VDD */ |
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u8 voltage_min[4]; /* Register values; [0] = VDD */ |
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u8 voltage_max[4]; /* Register values; [0] = VDD */ |
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u8 fan_in[2]; |
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u8 fan_min[2]; |
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u8 fan_div[2]; /* Register encoding, shifted right */ |
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u8 fan_auto1; /* Boolean */ |
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u8 temp_in; /* Register values */ |
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u8 temp_max; /* Register values */ |
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u8 temp_hyst; /* Register values */ |
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u8 alarms; /* Register value */ |
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u8 alarm_mask; |
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u8 beep_mask; /* Register value */ |
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u8 beep_enable; /* Boolean */ |
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}; |
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/* |
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* Registers 0x07 to 0x0c are word-sized, others are byte-sized |
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* GL518 uses a high-byte first convention, which is exactly opposite to |
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* the SMBus standard. |
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*/ |
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static int gl518_read_value(struct i2c_client *client, u8 reg) |
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{ |
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if ((reg >= 0x07) && (reg <= 0x0c)) |
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return i2c_smbus_read_word_swapped(client, reg); |
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else |
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return i2c_smbus_read_byte_data(client, reg); |
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} |
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static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) |
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{ |
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if ((reg >= 0x07) && (reg <= 0x0c)) |
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return i2c_smbus_write_word_swapped(client, reg, value); |
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else |
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return i2c_smbus_write_byte_data(client, reg, value); |
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} |
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static struct gl518_data *gl518_update_device(struct device *dev) |
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{ |
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struct gl518_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int val; |
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mutex_lock(&data->update_lock); |
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if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
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|| !data->valid) { |
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dev_dbg(&client->dev, "Starting gl518 update\n"); |
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data->alarms = gl518_read_value(client, GL518_REG_INT); |
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data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); |
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val = gl518_read_value(client, GL518_REG_VDD_LIMIT); |
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data->voltage_min[0] = val & 0xff; |
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data->voltage_max[0] = (val >> 8) & 0xff; |
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val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); |
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data->voltage_min[1] = val & 0xff; |
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data->voltage_max[1] = (val >> 8) & 0xff; |
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val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); |
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data->voltage_min[2] = val & 0xff; |
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data->voltage_max[2] = (val >> 8) & 0xff; |
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val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); |
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data->voltage_min[3] = val & 0xff; |
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data->voltage_max[3] = (val >> 8) & 0xff; |
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val = gl518_read_value(client, GL518_REG_FAN_COUNT); |
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data->fan_in[0] = (val >> 8) & 0xff; |
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data->fan_in[1] = val & 0xff; |
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val = gl518_read_value(client, GL518_REG_FAN_LIMIT); |
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data->fan_min[0] = (val >> 8) & 0xff; |
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data->fan_min[1] = val & 0xff; |
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data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); |
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data->temp_max = |
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gl518_read_value(client, GL518_REG_TEMP_MAX); |
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data->temp_hyst = |
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gl518_read_value(client, GL518_REG_TEMP_HYST); |
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val = gl518_read_value(client, GL518_REG_MISC); |
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data->fan_div[0] = (val >> 6) & 0x03; |
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data->fan_div[1] = (val >> 4) & 0x03; |
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data->fan_auto1 = (val >> 3) & 0x01; |
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data->alarms &= data->alarm_mask; |
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val = gl518_read_value(client, GL518_REG_CONF); |
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data->beep_enable = (val >> 2) & 1; |
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if (data->type != gl518sm_r00) { |
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data->voltage_in[0] = |
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gl518_read_value(client, GL518_REG_VDD); |
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data->voltage_in[1] = |
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gl518_read_value(client, GL518_REG_VIN1); |
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data->voltage_in[2] = |
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gl518_read_value(client, GL518_REG_VIN2); |
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} |
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data->voltage_in[3] = |
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gl518_read_value(client, GL518_REG_VIN3); |
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data->last_updated = jiffies; |
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data->valid = 1; |
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} |
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mutex_unlock(&data->update_lock); |
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return data; |
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} |
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/* |
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* Sysfs stuff |
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*/ |
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#define show(type, suffix, value) \ |
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static ssize_t show_##suffix(struct device *dev, \ |
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struct device_attribute *attr, char *buf) \ |
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{ \ |
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struct gl518_data *data = gl518_update_device(dev); \ |
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return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ |
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} |
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show(TEMP, temp_input1, temp_in); |
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show(TEMP, temp_max1, temp_max); |
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show(TEMP, temp_hyst1, temp_hyst); |
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show(BOOL, fan_auto1, fan_auto1); |
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show(VDD, in_input0, voltage_in[0]); |
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show(IN, in_input1, voltage_in[1]); |
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show(IN, in_input2, voltage_in[2]); |
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show(IN, in_input3, voltage_in[3]); |
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show(VDD, in_min0, voltage_min[0]); |
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show(IN, in_min1, voltage_min[1]); |
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show(IN, in_min2, voltage_min[2]); |
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show(IN, in_min3, voltage_min[3]); |
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show(VDD, in_max0, voltage_max[0]); |
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show(IN, in_max1, voltage_max[1]); |
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show(IN, in_max2, voltage_max[2]); |
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show(IN, in_max3, voltage_max[3]); |
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show(RAW, alarms, alarms); |
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show(BOOL, beep_enable, beep_enable); |
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show(BEEP_MASK, beep_mask, beep_mask); |
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static ssize_t fan_input_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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int nr = to_sensor_dev_attr(attr)->index; |
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struct gl518_data *data = gl518_update_device(dev); |
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return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr], |
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DIV_FROM_REG(data->fan_div[nr]))); |
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} |
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static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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int nr = to_sensor_dev_attr(attr)->index; |
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struct gl518_data *data = gl518_update_device(dev); |
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return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], |
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DIV_FROM_REG(data->fan_div[nr]))); |
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} |
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static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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int nr = to_sensor_dev_attr(attr)->index; |
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struct gl518_data *data = gl518_update_device(dev); |
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return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); |
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} |
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#define set(type, suffix, value, reg) \ |
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static ssize_t set_##suffix(struct device *dev, \ |
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struct device_attribute *attr, \ |
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const char *buf, size_t count) \ |
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{ \ |
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struct gl518_data *data = dev_get_drvdata(dev); \ |
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struct i2c_client *client = data->client; \ |
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long val; \ |
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int err = kstrtol(buf, 10, &val); \ |
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if (err) \ |
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return err; \ |
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\ |
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mutex_lock(&data->update_lock); \ |
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data->value = type##_TO_REG(val); \ |
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gl518_write_value(client, reg, data->value); \ |
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mutex_unlock(&data->update_lock); \ |
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return count; \ |
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} |
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#define set_bits(type, suffix, value, reg, mask, shift) \ |
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static ssize_t set_##suffix(struct device *dev, \ |
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struct device_attribute *attr, \ |
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const char *buf, size_t count) \ |
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{ \ |
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struct gl518_data *data = dev_get_drvdata(dev); \ |
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struct i2c_client *client = data->client; \ |
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int regvalue; \ |
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unsigned long val; \ |
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int err = kstrtoul(buf, 10, &val); \ |
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if (err) \ |
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return err; \ |
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\ |
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mutex_lock(&data->update_lock); \ |
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regvalue = gl518_read_value(client, reg); \ |
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data->value = type##_TO_REG(val); \ |
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regvalue = (regvalue & ~mask) | (data->value << shift); \ |
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gl518_write_value(client, reg, regvalue); \ |
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mutex_unlock(&data->update_lock); \ |
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return count; \ |
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} |
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#define set_low(type, suffix, value, reg) \ |
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set_bits(type, suffix, value, reg, 0x00ff, 0) |
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#define set_high(type, suffix, value, reg) \ |
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set_bits(type, suffix, value, reg, 0xff00, 8) |
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set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); |
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set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); |
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set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); |
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set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); |
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set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); |
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set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); |
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set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); |
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set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); |
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set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); |
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set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); |
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set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); |
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set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); |
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set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); |
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static ssize_t fan_min_store(struct device *dev, |
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struct device_attribute *attr, const char *buf, |
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size_t count) |
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{ |
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struct gl518_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int nr = to_sensor_dev_attr(attr)->index; |
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int regvalue; |
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unsigned long val; |
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int err; |
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err = kstrtoul(buf, 10, &val); |
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if (err) |
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return err; |
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mutex_lock(&data->update_lock); |
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regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); |
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data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
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regvalue = (regvalue & (0xff << (8 * nr))) |
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| (data->fan_min[nr] << (8 * (1 - nr))); |
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gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); |
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data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); |
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if (data->fan_min[nr] == 0) |
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data->alarm_mask &= ~(0x20 << nr); |
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else |
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data->alarm_mask |= (0x20 << nr); |
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data->beep_mask &= data->alarm_mask; |
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gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t fan_div_store(struct device *dev, |
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struct device_attribute *attr, const char *buf, |
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size_t count) |
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{ |
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struct gl518_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int nr = to_sensor_dev_attr(attr)->index; |
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int regvalue; |
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unsigned long val; |
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int err; |
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err = kstrtoul(buf, 10, &val); |
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if (err) |
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return err; |
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switch (val) { |
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case 1: |
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val = 0; |
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break; |
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case 2: |
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val = 1; |
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break; |
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case 4: |
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val = 2; |
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break; |
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case 8: |
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val = 3; |
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break; |
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default: |
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dev_err(dev, |
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"Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n", |
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val); |
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return -EINVAL; |
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} |
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mutex_lock(&data->update_lock); |
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regvalue = gl518_read_value(client, GL518_REG_MISC); |
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data->fan_div[nr] = val; |
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regvalue = (regvalue & ~(0xc0 >> (2 * nr))) |
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| (data->fan_div[nr] << (6 - 2 * nr)); |
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gl518_write_value(client, GL518_REG_MISC, regvalue); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static DEVICE_ATTR(temp1_input, 0444, show_temp_input1, NULL); |
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static DEVICE_ATTR(temp1_max, 0644, show_temp_max1, set_temp_max1); |
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static DEVICE_ATTR(temp1_max_hyst, 0644, |
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show_temp_hyst1, set_temp_hyst1); |
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static DEVICE_ATTR(fan1_auto, 0644, show_fan_auto1, set_fan_auto1); |
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static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0); |
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static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1); |
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static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); |
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static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); |
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static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); |
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static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); |
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static DEVICE_ATTR(in0_input, 0444, show_in_input0, NULL); |
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static DEVICE_ATTR(in1_input, 0444, show_in_input1, NULL); |
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static DEVICE_ATTR(in2_input, 0444, show_in_input2, NULL); |
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static DEVICE_ATTR(in3_input, 0444, show_in_input3, NULL); |
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static DEVICE_ATTR(in0_min, 0644, show_in_min0, set_in_min0); |
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static DEVICE_ATTR(in1_min, 0644, show_in_min1, set_in_min1); |
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static DEVICE_ATTR(in2_min, 0644, show_in_min2, set_in_min2); |
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static DEVICE_ATTR(in3_min, 0644, show_in_min3, set_in_min3); |
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static DEVICE_ATTR(in0_max, 0644, show_in_max0, set_in_max0); |
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static DEVICE_ATTR(in1_max, 0644, show_in_max1, set_in_max1); |
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static DEVICE_ATTR(in2_max, 0644, show_in_max2, set_in_max2); |
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static DEVICE_ATTR(in3_max, 0644, show_in_max3, set_in_max3); |
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static DEVICE_ATTR(alarms, 0444, show_alarms, NULL); |
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static DEVICE_ATTR(beep_enable, 0644, |
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show_beep_enable, set_beep_enable); |
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static DEVICE_ATTR(beep_mask, 0644, |
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show_beep_mask, set_beep_mask); |
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static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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int bitnr = to_sensor_dev_attr(attr)->index; |
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struct gl518_data *data = gl518_update_device(dev); |
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return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); |
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} |
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static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); |
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static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); |
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static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); |
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static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); |
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static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); |
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static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5); |
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static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6); |
|
|
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static ssize_t beep_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
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int bitnr = to_sensor_dev_attr(attr)->index; |
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struct gl518_data *data = gl518_update_device(dev); |
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return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); |
|
} |
|
|
|
static ssize_t beep_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
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struct gl518_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int bitnr = to_sensor_dev_attr(attr)->index; |
|
unsigned long bit; |
|
int err; |
|
|
|
err = kstrtoul(buf, 10, &bit); |
|
if (err) |
|
return err; |
|
|
|
if (bit & ~1) |
|
return -EINVAL; |
|
|
|
mutex_lock(&data->update_lock); |
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data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); |
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if (bit) |
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data->beep_mask |= (1 << bitnr); |
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else |
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data->beep_mask &= ~(1 << bitnr); |
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gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); |
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mutex_unlock(&data->update_lock); |
|
return count; |
|
} |
|
|
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static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0); |
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static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1); |
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static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2); |
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static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3); |
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static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4); |
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static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5); |
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static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6); |
|
|
|
static struct attribute *gl518_attributes[] = { |
|
&dev_attr_in3_input.attr, |
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&dev_attr_in0_min.attr, |
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&dev_attr_in1_min.attr, |
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&dev_attr_in2_min.attr, |
|
&dev_attr_in3_min.attr, |
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&dev_attr_in0_max.attr, |
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&dev_attr_in1_max.attr, |
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&dev_attr_in2_max.attr, |
|
&dev_attr_in3_max.attr, |
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&sensor_dev_attr_in0_alarm.dev_attr.attr, |
|
&sensor_dev_attr_in1_alarm.dev_attr.attr, |
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&sensor_dev_attr_in2_alarm.dev_attr.attr, |
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&sensor_dev_attr_in3_alarm.dev_attr.attr, |
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&sensor_dev_attr_in0_beep.dev_attr.attr, |
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&sensor_dev_attr_in1_beep.dev_attr.attr, |
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&sensor_dev_attr_in2_beep.dev_attr.attr, |
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&sensor_dev_attr_in3_beep.dev_attr.attr, |
|
|
|
&dev_attr_fan1_auto.attr, |
|
&sensor_dev_attr_fan1_input.dev_attr.attr, |
|
&sensor_dev_attr_fan2_input.dev_attr.attr, |
|
&sensor_dev_attr_fan1_min.dev_attr.attr, |
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&sensor_dev_attr_fan2_min.dev_attr.attr, |
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&sensor_dev_attr_fan1_div.dev_attr.attr, |
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&sensor_dev_attr_fan2_div.dev_attr.attr, |
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&sensor_dev_attr_fan1_alarm.dev_attr.attr, |
|
&sensor_dev_attr_fan2_alarm.dev_attr.attr, |
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&sensor_dev_attr_fan1_beep.dev_attr.attr, |
|
&sensor_dev_attr_fan2_beep.dev_attr.attr, |
|
|
|
&dev_attr_temp1_input.attr, |
|
&dev_attr_temp1_max.attr, |
|
&dev_attr_temp1_max_hyst.attr, |
|
&sensor_dev_attr_temp1_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp1_beep.dev_attr.attr, |
|
|
|
&dev_attr_alarms.attr, |
|
&dev_attr_beep_enable.attr, |
|
&dev_attr_beep_mask.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group gl518_group = { |
|
.attrs = gl518_attributes, |
|
}; |
|
|
|
static struct attribute *gl518_attributes_r80[] = { |
|
&dev_attr_in0_input.attr, |
|
&dev_attr_in1_input.attr, |
|
&dev_attr_in2_input.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group gl518_group_r80 = { |
|
.attrs = gl518_attributes_r80, |
|
}; |
|
|
|
/* |
|
* Real code |
|
*/ |
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */ |
|
static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info) |
|
{ |
|
struct i2c_adapter *adapter = client->adapter; |
|
int rev; |
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | |
|
I2C_FUNC_SMBUS_WORD_DATA)) |
|
return -ENODEV; |
|
|
|
/* Now, we do the remaining detection. */ |
|
if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) |
|
|| (gl518_read_value(client, GL518_REG_CONF) & 0x80)) |
|
return -ENODEV; |
|
|
|
/* Determine the chip type. */ |
|
rev = gl518_read_value(client, GL518_REG_REVISION); |
|
if (rev != 0x00 && rev != 0x80) |
|
return -ENODEV; |
|
|
|
strlcpy(info->type, "gl518sm", I2C_NAME_SIZE); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Called when we have found a new GL518SM. |
|
* Note that we preserve D4:NoFan2 and D2:beep_enable. |
|
*/ |
|
static void gl518_init_client(struct i2c_client *client) |
|
{ |
|
/* Make sure we leave D7:Reset untouched */ |
|
u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; |
|
|
|
/* Comparator mode (D3=0), standby mode (D6=0) */ |
|
gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); |
|
|
|
/* Never interrupts */ |
|
gl518_write_value(client, GL518_REG_MASK, 0x00); |
|
|
|
/* Clear status register (D5=1), start (D6=1) */ |
|
gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); |
|
gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); |
|
} |
|
|
|
static int gl518_probe(struct i2c_client *client) |
|
{ |
|
struct device *dev = &client->dev; |
|
struct device *hwmon_dev; |
|
struct gl518_data *data; |
|
int revision; |
|
|
|
data = devm_kzalloc(dev, sizeof(struct gl518_data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->client = client; |
|
revision = gl518_read_value(client, GL518_REG_REVISION); |
|
data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; |
|
mutex_init(&data->update_lock); |
|
|
|
/* Initialize the GL518SM chip */ |
|
data->alarm_mask = 0xff; |
|
gl518_init_client(client); |
|
|
|
/* sysfs hooks */ |
|
data->groups[0] = &gl518_group; |
|
if (data->type == gl518sm_r80) |
|
data->groups[1] = &gl518_group_r80; |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
|
data, data->groups); |
|
return PTR_ERR_OR_ZERO(hwmon_dev); |
|
} |
|
|
|
static const struct i2c_device_id gl518_id[] = { |
|
{ "gl518sm", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, gl518_id); |
|
|
|
static struct i2c_driver gl518_driver = { |
|
.class = I2C_CLASS_HWMON, |
|
.driver = { |
|
.name = "gl518sm", |
|
}, |
|
.probe_new = gl518_probe, |
|
.id_table = gl518_id, |
|
.detect = gl518_detect, |
|
.address_list = normal_i2c, |
|
}; |
|
|
|
module_i2c_driver(gl518_driver); |
|
|
|
MODULE_AUTHOR("Frodo Looijaard <[email protected]>, " |
|
"Kyosti Malkki <[email protected]> and " |
|
"Hong-Gunn Chew <[email protected]>"); |
|
MODULE_DESCRIPTION("GL518SM driver"); |
|
MODULE_LICENSE("GPL");
|
|
|