This driver adds support for the monitoring features of the Summit Microelectronics SMM665 Six-Channel Active DC Output Controller/Monitor. Signed-off-by: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx> --- drivers/hwmon/Kconfig | 12 + drivers/hwmon/Makefile | 1 + drivers/hwmon/smm665.c | 739 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 752 insertions(+), 0 deletions(-) create mode 100644 drivers/hwmon/smm665.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index e19cf8e..fc5e229 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -739,6 +739,18 @@ config SENSORS_SIS5595 This driver can also be built as a module. If so, the module will be called sis5595. +config SENSORS_SMM665 + tristate "Summit Microelectronics SMM665" + depends on I2C && EXPERIMENTAL + default n + help + If you say yes here you get support for the hardware monitoring + features of the Summit Microelectronics SMM665 Six-Channel + Active DC Output Controller / Monitor. + + This driver can also be built as a module. If so, the module will + be called smm665. + config SENSORS_DME1737 tristate "SMSC DME1737, SCH311x and compatibles" depends on I2C && EXPERIMENTAL diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 2138ceb..8a5c9f5 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -76,6 +76,7 @@ obj-$(CONFIG_SENSORS_LM93) += lm93.o obj-$(CONFIG_SENSORS_LM95241) += lm95241.o obj-$(CONFIG_SENSORS_LTC4215) += ltc4215.o obj-$(CONFIG_SENSORS_LTC4245) += ltc4245.o +obj-$(CONFIG_SENSORS_SMM665) += smm665.o obj-$(CONFIG_SENSORS_MAX1111) += max1111.o obj-$(CONFIG_SENSORS_MAX1619) += max1619.o obj-$(CONFIG_SENSORS_MAX6650) += max6650.o diff --git a/drivers/hwmon/smm665.c b/drivers/hwmon/smm665.c new file mode 100644 index 0000000..84d9d21 --- /dev/null +++ b/drivers/hwmon/smm665.c @@ -0,0 +1,739 @@ +/* + * Driver for SMM665 Power Controller / Monitor + * + * Copyright (C) 2010 Ericsson AB. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This driver should with no or minor modifications also work for SMM766, + * SMM764, and SMM465. Only monitoring functionality is implemented. + * + * Datasheets: + * http://www.summitmicro.com/prod_select/summary/SMM665/SMM665B_2089_20.pdf + * http://www.summitmicro.com/prod_select/summary/SMM766B/SMM766B_2122.pdf + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/delay.h> + +/* ADC channel addresses */ +enum smm665_adcregs { + SMM665_MISC16_ADC_DATA_A = 0x00, + SMM665_MISC16_ADC_DATA_B = 0x01, + SMM665_MISC16_ADC_DATA_C = 0x02, + SMM665_MISC16_ADC_DATA_D = 0x03, + SMM665_MISC16_ADC_DATA_E = 0x04, + SMM665_MISC16_ADC_DATA_F = 0x05, + SMM665_MISC16_ADC_DATA_VDD = 0x06, + SMM665_MISC16_ADC_DATA_12V = 0x07, + SMM665_MISC16_ADC_DATA_INT_TEMP = 0x08, + SMM665_MISC16_ADC_DATA_AIN1 = 0x09, + SMM665_MISC16_ADC_DATA_AIN2 = 0x0a, +}; + +enum smm665_cmdregs { + SMM665_MISC8_CMD_STS = 0x80, + SMM665_MISC8_STATUS1 = 0x81, + SMM665_MISC8_STATUSS2 = 0x82, + SMM665_MISC8_IO_POLARITY = 0x83, + SMM665_MISC8_PUP_POLARITY = 0x84, + SMM665_MISC8_ADOC_STATUS1 = 0x85, + SMM665_MISC8_ADOC_STATUS2 = 0x86, + SMM665_MISC8_WRITE_PROT = 0x87, + SMM665_MISC8_STS_TRACK = 0x88, +}; + +/* + * Configuration registers and register groups + */ +#define SMM665_ADOC_ENABLE 0x0d +#define SMM665_LIMIT_BASE 0x80 + +/* + * Limit register bit masks + */ +#define SMM665_TRIGGER_RST 0x8000 +#define SMM665_TRIGGER_HEALTHY 0x4000 +#define SMM665_TRIGGER_POWEROFF 0x2000 +#define SMM665_TRIGGER_SHUTDOWN 0x1000 +#define SMM665_ADC_MASK 0x03ff + +#define smm665_is_critical(lim) ((lim) & (SMM665_TRIGGER_RST \ + | SMM665_TRIGGER_POWEROFF \ + | SMM665_TRIGGER_SHUTDOWN)) +/* + * Fault register bit definitions + * Values are merged from status registers 1/2, + * with status register 1 providing the upper 8 bits. + */ +#define SMM665_FAULT_A 0x0001 +#define SMM665_FAULT_B 0x0002 +#define SMM665_FAULT_C 0x0004 +#define SMM665_FAULT_D 0x0008 +#define SMM665_FAULT_E 0x0010 +#define SMM665_FAULT_F 0x0020 +#define SMM665_FAULT_VDD 0x0040 +#define SMM665_FAULT_12V 0x0080 +#define SMM665_FAULT_TEMP 0x0100 +#define SMM665_FAULT_AIN1 0x0200 +#define SMM665_FAULT_AIN2 0x0400 + +/* + * I2C Register addresses + * + * The configuration register needs to be the configured base register. + * The command/status register address is derived from it. + */ +#define SMM665_REGMASK 0x78 +#define SMM665_CMDREG_BASE 0x48 +#define SMM665_CONFREG_BASE 0x50 + +/* Internal reference voltage (VREF, x 1000 */ +#define SMM665_VREF_ADC_X1000 1250 + +/* + * Equations given by chip manufacturer to calculate voltage/temperature values + * vref = Reference voltage on VREF_ADC pin + * adc = 10bit ADC value read back from registers + */ + +/* Voltage A-F and VDD */ +#define SMM665_VMON_ADC_TO_VOLTS(vref, adc) ((adc) * (vref) / 256) + +/* Voltage 12VIN */ +#define SMM665_12VIN_ADC_TO_VOLTS(vref, adc) ((adc) * (vref) * 3 / 256) + +/* Voltage AIN1, AIN2 */ +#define SMM665_AIN_ADC_TO_VOLTS(vref, adc) ((adc) * (vref) / 512) + +/* Temp Sensor */ +#define SMM665_TEMP_ADC_TO_CELSIUS(adc) ((adc) <= 511) ? \ + ((int)(adc) * 1000 / 4) : \ + (((int)(adc) - 0x400) * 1000 / 4) + +#define SMM665_NUM_ADC 11 +#define SMM665_ADC_RETRIES 5 +#define SMM665_ADC_WAIT 100 /* conversion time is 70 uS for SMM665B, + 182 uS for SMM766 */ + +struct smm665_data { + struct device *hwmon_dev; + + struct mutex update_lock; + bool valid; + unsigned long last_updated; /* in jiffies */ + u16 adc[SMM665_NUM_ADC]; /* adc values (raw) */ + u16 faults; /* fault status */ + int cu[SMM665_NUM_ADC]; /* critical under limit (converted) */ + int au[SMM665_NUM_ADC]; /* alarm under limit (converted) */ + int co[SMM665_NUM_ADC]; /* critical over limit (converted) */ + int ao[SMM665_NUM_ADC]; /* alarm over limit (converted) */ + struct i2c_client *cmdreg; +}; + +/* + * smm665_read16() + * + * Read 16 bit value from <reg>, <reg+1>. Upper 8 bits are in <reg>. + */ +static int smm665_read16(struct i2c_client *client, int reg) +{ + int rv, val; + + rv = i2c_smbus_read_byte_data(client, reg); + if (rv < 0) + return rv; + val = rv << 8; + rv = i2c_smbus_read_byte_data(client, reg + 1); + if (rv < 0) + return rv; + val |= rv; + return val; +} + +/* + * Read adc value. + */ +static int smm665_read_adc(struct i2c_client *client, int adc) +{ + int rv = -1; + int retries; + + for (retries = 0; retries < SMM665_ADC_RETRIES; retries++) { + int radc; + + /* + * Algorithm for reading ADC, per SMM665 datasheet + * + * {[S][addr][W][Ack]} {[offset][Ack]} {[S][addr][R][Nack]} + * [wait 70 uS] + * {[S][addr][R][Ack]} {[datahi][Ack]} {[datalo][Ack][P]} + * + * To implement the first part of this exchange, + * do a full read transaction and expect a failure/Nack. + * This sets up the address pointer on the SMM665 + * and starts the ADC conversion. + * Then do a two-byte read transaction. + */ + rv = i2c_smbus_read_byte_data(client, adc << 3); + if (rv >= 0) { + /* No error, something is wrong. Retry. */ + rv = -1; + continue; + } + udelay(SMM665_ADC_WAIT); + /* + * Now read two bytes. + * + * Neither i2c_smbus_read_byte() nor + * i2c_smbus_read_block_data() worked here, + * so use i2c_smbus_read_word_data() instead. + * We could also try to use i2c_master_recv(), + * but that is not always supported. + */ + rv = i2c_smbus_read_word_data(client, 0); + if (rv < 0) + continue; + /* + * Validate/verify readback adc channel (in bit 11..14) + * High byte is in lower 8 bit of rv, so only shift by 3. + */ + radc = (rv >> 3) & 0x0f; + if (radc != adc) { + rv = -1; + continue; + } + + /* Byte order is reversed, need to swap. */ + rv = swab16(rv) & SMM665_ADC_MASK; + break; + } + return rv; +} + +static struct smm665_data *smm665_update_device(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct smm665_data *data = i2c_get_clientdata(client); + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { + int i, faults; + + /* + * read status registers + */ + faults = smm665_read16(client, SMM665_MISC8_STATUS1); + if (unlikely(faults < 0)) + data->faults = 0; + else + data->faults = faults; + + /* Read adc registers */ + for (i = 0; i < SMM665_NUM_ADC; i++) { + int val = smm665_read_adc(data->cmdreg, i); + if (unlikely(val < 0)) + data->adc[i] = 0; + else + data->adc[i] = val; + } + + data->last_updated = jiffies; + data->valid = 1; + } + + mutex_unlock(&data->update_lock); + + return data; +} + +/* Return converted value from given adc */ +static int smm665_convert(u16 adcval, int index) +{ + int val = 0; + + switch (index) { + case SMM665_MISC16_ADC_DATA_12V: + val = SMM665_12VIN_ADC_TO_VOLTS(SMM665_VREF_ADC_X1000, + adcval & SMM665_ADC_MASK); + break; + + case SMM665_MISC16_ADC_DATA_VDD: + case SMM665_MISC16_ADC_DATA_A: + case SMM665_MISC16_ADC_DATA_B: + case SMM665_MISC16_ADC_DATA_C: + case SMM665_MISC16_ADC_DATA_D: + case SMM665_MISC16_ADC_DATA_E: + case SMM665_MISC16_ADC_DATA_F: + val = SMM665_VMON_ADC_TO_VOLTS(SMM665_VREF_ADC_X1000, + adcval & SMM665_ADC_MASK); + break; + + case SMM665_MISC16_ADC_DATA_AIN1: + case SMM665_MISC16_ADC_DATA_AIN2: + val = SMM665_AIN_ADC_TO_VOLTS(SMM665_VREF_ADC_X1000, + adcval & SMM665_ADC_MASK); + break; + + case SMM665_MISC16_ADC_DATA_INT_TEMP: + val = SMM665_TEMP_ADC_TO_CELSIUS(adcval & SMM665_ADC_MASK); + break; + + default: + /* If we get here, the developer messed up */ + WARN_ON_ONCE(1); + break; + } + + return val; +} + +/* Return converted value from given adc */ +static int smm665_get_input(struct device *dev, int adc) +{ + struct smm665_data *data = smm665_update_device(dev); + + return smm665_convert(data->adc[adc], adc); +} + +static int smm665_get_min(struct device *dev, int index) +{ + struct i2c_client *client = to_i2c_client(dev); + struct smm665_data *data = i2c_get_clientdata(client); + + return data->au[index]; +} + +static int smm665_get_max(struct device *dev, int index) +{ + struct i2c_client *client = to_i2c_client(dev); + struct smm665_data *data = i2c_get_clientdata(client); + + return data->ao[index]; +} + +static int smm665_get_crit(struct device *dev, int index) +{ + struct i2c_client *client = to_i2c_client(dev); + struct smm665_data *data = i2c_get_clientdata(client); + + return data->co[index]; +} + +static int smm665_get_min_alarm(struct device *dev, int index) +{ + struct smm665_data *data = smm665_update_device(dev); + int val = smm665_convert(data->adc[index], index); + + /* + * Look for lower alarm limit. Report alarm if the current + * adc value is equal to or lower than the specified limit. + */ + if (val <= data->au[index]) + return 1; + return 0; +} + +static int smm665_get_max_alarm(struct device *dev, int index) +{ + struct smm665_data *data = smm665_update_device(dev); + int val = smm665_convert(data->adc[index], index); + + /* + * Look for upper alarm limit. Report alarm if the current + * adc value is equal to or larger than the specified limit. + */ + if (val >= data->ao[index]) + return 1; + + return 0; +} + +static int smm665_get_fault(struct device *dev, int index) +{ + struct smm665_data *data = smm665_update_device(dev); + + if (data->faults & (1 << index)) + return 1; + + return 0; +} + +#define SMM665_SHOW(what) \ + static ssize_t smm665_show_##what(struct device *dev, \ + struct device_attribute *da, char *buf) \ +{ \ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ + const int val = smm665_get_##what(dev, attr->index); \ + return snprintf(buf, PAGE_SIZE, "%d\n", val); \ +} + +SMM665_SHOW(input); +SMM665_SHOW(min); +SMM665_SHOW(max); +SMM665_SHOW(crit); +SMM665_SHOW(fault); +SMM665_SHOW(min_alarm); +SMM665_SHOW(max_alarm); + +/* These macros are used below in constructing device attribute objects + * for use with sysfs_create_group() to make a sysfs device file + * for each register. + */ + +#define SMM665_ATTR(name, type, cmd_idx) \ + static SENSOR_DEVICE_ATTR(name##_##type, S_IRUGO, \ + smm665_show_##type, NULL, cmd_idx) + +/* Construct a sensor_device_attribute structure for each register */ + +/* Input voltages */ +SMM665_ATTR(in1, input, SMM665_MISC16_ADC_DATA_12V); +SMM665_ATTR(in2, input, SMM665_MISC16_ADC_DATA_VDD); +SMM665_ATTR(in3, input, SMM665_MISC16_ADC_DATA_A); +SMM665_ATTR(in4, input, SMM665_MISC16_ADC_DATA_B); +SMM665_ATTR(in5, input, SMM665_MISC16_ADC_DATA_C); +SMM665_ATTR(in6, input, SMM665_MISC16_ADC_DATA_D); +SMM665_ATTR(in7, input, SMM665_MISC16_ADC_DATA_E); +SMM665_ATTR(in8, input, SMM665_MISC16_ADC_DATA_F); +SMM665_ATTR(in9, input, SMM665_MISC16_ADC_DATA_AIN1); +SMM665_ATTR(in10, input, SMM665_MISC16_ADC_DATA_AIN2); + +/* Input voltages min */ +SMM665_ATTR(in1, min, SMM665_MISC16_ADC_DATA_12V); +SMM665_ATTR(in2, min, SMM665_MISC16_ADC_DATA_VDD); +SMM665_ATTR(in3, min, SMM665_MISC16_ADC_DATA_A); +SMM665_ATTR(in4, min, SMM665_MISC16_ADC_DATA_B); +SMM665_ATTR(in5, min, SMM665_MISC16_ADC_DATA_C); +SMM665_ATTR(in6, min, SMM665_MISC16_ADC_DATA_D); +SMM665_ATTR(in7, min, SMM665_MISC16_ADC_DATA_E); +SMM665_ATTR(in8, min, SMM665_MISC16_ADC_DATA_F); +SMM665_ATTR(in9, min, SMM665_MISC16_ADC_DATA_AIN1); +SMM665_ATTR(in10, min, SMM665_MISC16_ADC_DATA_AIN2); + +/* Input voltages max */ +SMM665_ATTR(in1, max, SMM665_MISC16_ADC_DATA_12V); +SMM665_ATTR(in2, max, SMM665_MISC16_ADC_DATA_VDD); +SMM665_ATTR(in3, max, SMM665_MISC16_ADC_DATA_A); +SMM665_ATTR(in4, max, SMM665_MISC16_ADC_DATA_B); +SMM665_ATTR(in5, max, SMM665_MISC16_ADC_DATA_C); +SMM665_ATTR(in6, max, SMM665_MISC16_ADC_DATA_D); +SMM665_ATTR(in7, max, SMM665_MISC16_ADC_DATA_E); +SMM665_ATTR(in8, max, SMM665_MISC16_ADC_DATA_F); +SMM665_ATTR(in9, max, SMM665_MISC16_ADC_DATA_AIN1); +SMM665_ATTR(in10, max, SMM665_MISC16_ADC_DATA_AIN2); + +/* Input voltage min alarms */ +SMM665_ATTR(in1, min_alarm, SMM665_MISC16_ADC_DATA_12V); +SMM665_ATTR(in2, min_alarm, SMM665_MISC16_ADC_DATA_VDD); +SMM665_ATTR(in3, min_alarm, SMM665_MISC16_ADC_DATA_A); +SMM665_ATTR(in4, min_alarm, SMM665_MISC16_ADC_DATA_B); +SMM665_ATTR(in5, min_alarm, SMM665_MISC16_ADC_DATA_C); +SMM665_ATTR(in6, min_alarm, SMM665_MISC16_ADC_DATA_D); +SMM665_ATTR(in7, min_alarm, SMM665_MISC16_ADC_DATA_E); +SMM665_ATTR(in8, min_alarm, SMM665_MISC16_ADC_DATA_F); +SMM665_ATTR(in9, min_alarm, SMM665_MISC16_ADC_DATA_AIN1); +SMM665_ATTR(in10, min_alarm, SMM665_MISC16_ADC_DATA_AIN2); + +/* Input voltage max alarms */ +SMM665_ATTR(in1, max_alarm, SMM665_MISC16_ADC_DATA_12V); +SMM665_ATTR(in2, max_alarm, SMM665_MISC16_ADC_DATA_VDD); +SMM665_ATTR(in3, max_alarm, SMM665_MISC16_ADC_DATA_A); +SMM665_ATTR(in4, max_alarm, SMM665_MISC16_ADC_DATA_B); +SMM665_ATTR(in5, max_alarm, SMM665_MISC16_ADC_DATA_C); +SMM665_ATTR(in6, max_alarm, SMM665_MISC16_ADC_DATA_D); +SMM665_ATTR(in7, max_alarm, SMM665_MISC16_ADC_DATA_E); +SMM665_ATTR(in8, max_alarm, SMM665_MISC16_ADC_DATA_F); +SMM665_ATTR(in9, max_alarm, SMM665_MISC16_ADC_DATA_AIN1); +SMM665_ATTR(in10, max_alarm, SMM665_MISC16_ADC_DATA_AIN2); + +/* Faults */ +SMM665_ATTR(in1, fault, SMM665_FAULT_12V); +SMM665_ATTR(in2, fault, SMM665_FAULT_VDD); +SMM665_ATTR(in3, fault, SMM665_FAULT_A); +SMM665_ATTR(in4, fault, SMM665_FAULT_B); +SMM665_ATTR(in5, fault, SMM665_FAULT_C); +SMM665_ATTR(in6, fault, SMM665_FAULT_D); +SMM665_ATTR(in7, fault, SMM665_FAULT_E); +SMM665_ATTR(in8, fault, SMM665_FAULT_F); +SMM665_ATTR(in9, fault, SMM665_FAULT_AIN1); +SMM665_ATTR(in10, fault, SMM665_FAULT_AIN2); + +/* Temperature */ +SMM665_ATTR(temp1, input, SMM665_MISC16_ADC_DATA_INT_TEMP); +SMM665_ATTR(temp1, min, SMM665_MISC16_ADC_DATA_INT_TEMP); +SMM665_ATTR(temp1, max, SMM665_MISC16_ADC_DATA_INT_TEMP); +SMM665_ATTR(temp1, crit, SMM665_MISC16_ADC_DATA_INT_TEMP); +SMM665_ATTR(temp1, min_alarm, SMM665_MISC16_ADC_DATA_INT_TEMP); +SMM665_ATTR(temp1, max_alarm, SMM665_MISC16_ADC_DATA_INT_TEMP); +SMM665_ATTR(temp1, fault, SMM665_FAULT_TEMP); + +/* + * Finally, construct an array of pointers to members of the above objects, + * as required for sysfs_create_group() + */ +static struct attribute *smm665_attributes[] = { + &sensor_dev_attr_in1_input.dev_attr.attr, + &sensor_dev_attr_in1_min.dev_attr.attr, + &sensor_dev_attr_in1_max.dev_attr.attr, + &sensor_dev_attr_in1_min_alarm.dev_attr.attr, + &sensor_dev_attr_in1_max_alarm.dev_attr.attr, + &sensor_dev_attr_in1_fault.dev_attr.attr, + + &sensor_dev_attr_in2_input.dev_attr.attr, + &sensor_dev_attr_in2_min.dev_attr.attr, + &sensor_dev_attr_in2_max.dev_attr.attr, + &sensor_dev_attr_in2_min_alarm.dev_attr.attr, + &sensor_dev_attr_in2_max_alarm.dev_attr.attr, + &sensor_dev_attr_in2_fault.dev_attr.attr, + + &sensor_dev_attr_in3_input.dev_attr.attr, + &sensor_dev_attr_in3_min.dev_attr.attr, + &sensor_dev_attr_in3_max.dev_attr.attr, + &sensor_dev_attr_in3_min_alarm.dev_attr.attr, + &sensor_dev_attr_in3_max_alarm.dev_attr.attr, + &sensor_dev_attr_in3_fault.dev_attr.attr, + + &sensor_dev_attr_in4_input.dev_attr.attr, + &sensor_dev_attr_in4_min.dev_attr.attr, + &sensor_dev_attr_in4_max.dev_attr.attr, + &sensor_dev_attr_in4_min_alarm.dev_attr.attr, + &sensor_dev_attr_in4_max_alarm.dev_attr.attr, + &sensor_dev_attr_in4_fault.dev_attr.attr, + + &sensor_dev_attr_in5_input.dev_attr.attr, + &sensor_dev_attr_in5_min.dev_attr.attr, + &sensor_dev_attr_in5_max.dev_attr.attr, + &sensor_dev_attr_in5_min_alarm.dev_attr.attr, + &sensor_dev_attr_in5_max_alarm.dev_attr.attr, + &sensor_dev_attr_in5_fault.dev_attr.attr, + + &sensor_dev_attr_in6_input.dev_attr.attr, + &sensor_dev_attr_in6_min.dev_attr.attr, + &sensor_dev_attr_in6_max.dev_attr.attr, + &sensor_dev_attr_in6_min_alarm.dev_attr.attr, + &sensor_dev_attr_in6_max_alarm.dev_attr.attr, + &sensor_dev_attr_in6_fault.dev_attr.attr, + + &sensor_dev_attr_in7_input.dev_attr.attr, + &sensor_dev_attr_in7_min.dev_attr.attr, + &sensor_dev_attr_in7_max.dev_attr.attr, + &sensor_dev_attr_in7_min_alarm.dev_attr.attr, + &sensor_dev_attr_in7_max_alarm.dev_attr.attr, + &sensor_dev_attr_in7_fault.dev_attr.attr, + + &sensor_dev_attr_in8_input.dev_attr.attr, + &sensor_dev_attr_in8_min.dev_attr.attr, + &sensor_dev_attr_in8_max.dev_attr.attr, + &sensor_dev_attr_in8_min_alarm.dev_attr.attr, + &sensor_dev_attr_in8_max_alarm.dev_attr.attr, + &sensor_dev_attr_in8_fault.dev_attr.attr, + + &sensor_dev_attr_in9_input.dev_attr.attr, + &sensor_dev_attr_in9_min.dev_attr.attr, + &sensor_dev_attr_in9_max.dev_attr.attr, + &sensor_dev_attr_in9_min_alarm.dev_attr.attr, + &sensor_dev_attr_in9_max_alarm.dev_attr.attr, + &sensor_dev_attr_in9_fault.dev_attr.attr, + + &sensor_dev_attr_in10_input.dev_attr.attr, + &sensor_dev_attr_in10_min.dev_attr.attr, + &sensor_dev_attr_in10_max.dev_attr.attr, + &sensor_dev_attr_in10_min_alarm.dev_attr.attr, + &sensor_dev_attr_in10_max_alarm.dev_attr.attr, + &sensor_dev_attr_in10_fault.dev_attr.attr, + + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_min.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp1_crit.dev_attr.attr, + &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_fault.dev_attr.attr, + + NULL, +}; + +static const struct attribute_group smm665_group = { + .attrs = smm665_attributes, +}; + +static int smm665_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = client->adapter; + struct smm665_data *data; + int i, ret; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA + | I2C_FUNC_SMBUS_WORD_DATA)) + return -ENODEV; + + if (i2c_smbus_read_byte_data(client, SMM665_ADOC_ENABLE) < 0) + return -ENODEV; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) { + ret = -ENOMEM; + goto out_kzalloc; + } + + i2c_set_clientdata(client, data); + mutex_init(&data->update_lock); + + data->cmdreg = i2c_new_dummy(adapter, (client->addr & ~SMM665_REGMASK) + | SMM665_CMDREG_BASE); + if (!data->cmdreg) { + ret = -ENOMEM; + goto out_new_dummy; + } + if (i2c_smbus_read_byte_data(data->cmdreg, SMM665_MISC8_CMD_STS) < 0) { + ret = -ENODEV; + goto out_sysfs_create_group; + } + + /* + * Read limits. + * + * Limit registers start with register SMM665_LIMIT_BASE. + * Each channel uses 8 registers, providing four limit values + * per channel. + * + * Available limits from chip registers, per channel: + * u1: under limit 1 + * u2: under limit 2 + * o1: over limit 1 + * o2: over limit 2 + * + * Register address offsets: + * +0: u1[h] + * +1: u1[l] + * +2: u2[h] + * +3: u2[l] + * +4: o1[h] + * +5: o1[l] + * +6: o2[h] + * +7: o2[l] + * + * Limit register order is as defined with smm665_adcregs, + * so we use smm665_adcregs values throughout the code to index + * limit registers. + * + * We save the first retrieved value both as "critical" and "alarm" + * value. The second value overwrites either the critical or the + * alarm value, depending on its configuration. This ensures that both + * critical and alarm values are initialized, even if both registers are + * configured as critical or non-critical. + * + * Note: Critical values for voltage channels are saved, even though + * this information is currently not used by the driver. This is mostly + * for consistency, though it might eventually be useful if future APIs + * support reporting "critical" voltage values. + */ + ret = -ENODEV; + for (i = 0; i < SMM665_NUM_ADC; i++) { + int val; + + val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8); + if (unlikely(val < 0)) + goto out_sysfs_create_group; + data->cu[i] = data->au[i] = smm665_convert(val, i); + val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8 + 2); + if (unlikely(val < 0)) + goto out_sysfs_create_group; + if (smm665_is_critical(val)) + data->cu[i] = smm665_convert(val, i); + else + data->au[i] = smm665_convert(val, i); + val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8 + 4); + if (unlikely(val < 0)) + goto out_sysfs_create_group; + data->co[i] = data->ao[i] = smm665_convert(val, i); + val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8 + 6); + if (unlikely(val < 0)) + goto out_sysfs_create_group; + if (smm665_is_critical(val)) + data->co[i] = smm665_convert(val, i); + else + data->ao[i] = smm665_convert(val, i); + } + + /* Register sysfs hooks */ + ret = sysfs_create_group(&client->dev.kobj, &smm665_group); + if (ret) + goto out_sysfs_create_group; + + data->hwmon_dev = hwmon_device_register(&client->dev); + if (IS_ERR(data->hwmon_dev)) { + ret = PTR_ERR(data->hwmon_dev); + goto out_hwmon_device_register; + } + + return 0; + +out_hwmon_device_register: + sysfs_remove_group(&client->dev.kobj, &smm665_group); +out_sysfs_create_group: + i2c_unregister_device(data->cmdreg); +out_new_dummy: + kfree(data); +out_kzalloc: + return ret; +} + +static int smm665_remove(struct i2c_client *client) +{ + struct smm665_data *data = i2c_get_clientdata(client); + + i2c_unregister_device(data->cmdreg); + hwmon_device_unregister(data->hwmon_dev); + sysfs_remove_group(&client->dev.kobj, &smm665_group); + + kfree(data); + + return 0; +} + +static const struct i2c_device_id smm665_id[] = { + {"smm665", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, smm665_id); + +/* This is the driver that will be inserted */ +static struct i2c_driver smm665_driver = { + .driver = { + .name = "smm665", + }, + .probe = smm665_probe, + .remove = smm665_remove, + .id_table = smm665_id, +}; + +static int __init smm665_init(void) +{ + return i2c_add_driver(&smm665_driver); +} + +static void __exit smm665_exit(void) +{ + i2c_del_driver(&smm665_driver); +} + +MODULE_AUTHOR("Guenter Roeck"); +MODULE_DESCRIPTION("SMM665 driver"); +MODULE_LICENSE("GPL"); + +module_init(smm665_init); +module_exit(smm665_exit); -- 1.7.0.87.g0901d _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
