diff options
| -rw-r--r-- | Documentation/hwmon/smm665 | 157 | ||||
| -rw-r--r-- | MAINTAINERS | 7 | ||||
| -rw-r--r-- | drivers/hwmon/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/smm665.c | 743 |
5 files changed, 923 insertions, 0 deletions
diff --git a/Documentation/hwmon/smm665 b/Documentation/hwmon/smm665 new file mode 100644 index 000000000000..3820fc9ca52d --- /dev/null +++ b/Documentation/hwmon/smm665 @@ -0,0 +1,157 @@ +Kernel driver smm665 +==================== + +Supported chips: + * Summit Microelectronics SMM465 + Prefix: 'smm465' + Addresses scanned: - + Datasheet: + http://www.summitmicro.com/prod_select/summary/SMM465/SMM465DS.pdf + * Summit Microelectronics SMM665, SMM665B + Prefix: 'smm665' + Addresses scanned: - + Datasheet: + http://www.summitmicro.com/prod_select/summary/SMM665/SMM665B_2089_20.pdf + * Summit Microelectronics SMM665C + Prefix: 'smm665c' + Addresses scanned: - + Datasheet: + http://www.summitmicro.com/prod_select/summary/SMM665C/SMM665C_2125.pdf + * Summit Microelectronics SMM764 + Prefix: 'smm764' + Addresses scanned: - + Datasheet: + http://www.summitmicro.com/prod_select/summary/SMM764/SMM764_2098.pdf + * Summit Microelectronics SMM766, SMM766B + Prefix: 'smm766' + Addresses scanned: - + Datasheets: + http://www.summitmicro.com/prod_select/summary/SMM766/SMM766_2086.pdf + http://www.summitmicro.com/prod_select/summary/SMM766B/SMM766B_2122.pdf + +Author: Guenter Roeck <guenter.roeck@ericsson.com> + + +Module Parameters +----------------- + +* vref: int + Default: 1250 (mV) + Reference voltage on VREF_ADC pin in mV. It should not be necessary to set + this parameter unless a non-default reference voltage is used. + + +Description +----------- + +[From datasheet] The SMM665 is an Active DC Output power supply Controller +that monitors, margins and cascade sequences power. The part monitors six +power supply channels as well as VDD, 12V input, two general-purpose analog +inputs and an internal temperature sensor using a 10-bit ADC. + +Each monitored channel has its own high and low limits, plus a critical +limit. + +Support for SMM465, SMM764, and SMM766 has been implemented but is untested. + + +Usage Notes +----------- + +This driver does not probe for devices, since there is no register which +can be safely used to identify the chip. You will have to instantiate +the devices explicitly. When instantiating the device, you have to specify +its configuration register address. + +Example: the following will load the driver for an SMM665 at address 0x57 +on I2C bus #1: +$ modprobe smm665 +$ echo smm665 0x57 > /sys/bus/i2c/devices/i2c-1/new_device + + +Sysfs entries +------------- + +This driver uses the values in the datasheet to convert ADC register values +into the values specified in the sysfs-interface document. All attributes are +read only. + +Min, max, lcrit, and crit values are used by the chip to trigger external signals +and/or other activity. Triggered signals can include HEALTHY, RST, Power Off, +or Fault depending on the chip configuration. The driver reports values as lcrit +or crit if exceeding the limits triggers RST, Power Off, or Fault, and as min or +max otherwise. For details please see the SMM665 datasheet. + +For SMM465 and SMM764, values for Channel E and F are reported but undefined. + +in1_input 12V input voltage (mV) +in2_input 3.3V (VDD) input voltage (mV) +in3_input Channel A voltage (mV) +in4_input Channel B voltage (mV) +in5_input Channel C voltage (mV) +in6_input Channel D voltage (mV) +in7_input Channel E voltage (mV) +in8_input Channel F voltage (mV) +in9_input AIN1 voltage (mV) +in10_input AIN2 voltage (mV) + +in1_min 12v input minimum voltage (mV) +in2_min 3.3V (VDD) input minimum voltage (mV) +in3_min Channel A minimum voltage (mV) +in4_min Channel B minimum voltage (mV) +in5_min Channel C minimum voltage (mV) +in6_min Channel D minimum voltage (mV) +in7_min Channel E minimum voltage (mV) +in8_min Channel F minimum voltage (mV) +in9_min AIN1 minimum voltage (mV) +in10_min AIN2 minimum voltage (mV) + +in1_max 12v input maximum voltage (mV) +in2_max 3.3V (VDD) input maximum voltage (mV) +in3_max Channel A maximum voltage (mV) +in4_max Channel B maximum voltage (mV) +in5_max Channel C maximum voltage (mV) +in6_max Channel D maximum voltage (mV) +in7_max Channel E maximum voltage (mV) +in8_max Channel F maximum voltage (mV) +in9_max AIN1 maximum voltage (mV) +in10_max AIN2 maximum voltage (mV) + +in1_lcrit 12v input critical minimum voltage (mV) +in2_lcrit 3.3V (VDD) input critical minimum voltage (mV) +in3_lcrit Channel A critical minimum voltage (mV) +in4_lcrit Channel B critical minimum voltage (mV) +in5_lcrit Channel C critical minimum voltage (mV) +in6_lcrit Channel D critical minimum voltage (mV) +in7_lcrit Channel E critical minimum voltage (mV) +in8_lcrit Channel F critical minimum voltage (mV) +in9_lcrit AIN1 critical minimum voltage (mV) +in10_lcrit AIN2 critical minimum voltage (mV) + +in1_crit 12v input critical maximum voltage (mV) +in2_crit 3.3V (VDD) input critical maximum voltage (mV) +in3_crit Channel A critical maximum voltage (mV) +in4_crit Channel B critical maximum voltage (mV) +in5_crit Channel C critical maximum voltage (mV) +in6_crit Channel D critical maximum voltage (mV) +in7_crit Channel E critical maximum voltage (mV) +in8_crit Channel F critical maximum voltage (mV) +in9_crit AIN1 critical maximum voltage (mV) +in10_crit AIN2 critical maximum voltage (mV) + +in1_crit_alarm 12v input critical alarm +in2_crit_alarm 3.3V (VDD) input critical alarm +in3_crit_alarm Channel A critical alarm +in4_crit_alarm Channel B critical alarm +in5_crit_alarm Channel C critical alarm +in6_crit_alarm Channel D critical alarm +in7_crit_alarm Channel E critical alarm +in8_crit_alarm Channel F critical alarm +in9_crit_alarm AIN1 critical alarm +in10_crit_alarm AIN2 critical alarm + +temp1_input Chip tempererature +temp1_min Mimimum chip tempererature +temp1_max Maximum chip tempererature +temp1_crit Critical chip tempererature +temp1_crit_alarm Temperature critical alarm diff --git a/MAINTAINERS b/MAINTAINERS index c71d2c5bffa6..caacbcc3b64f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5251,6 +5251,13 @@ M: Nicolas Pitre <nico@fluxnic.net> S: Odd Fixes F: drivers/net/smc91x.* +SMM665 HARDWARE MONITOR DRIVER +M: Guenter Roeck <linux@roeck-us.net> +L: lm-sensors@lm-sensors.org +S: Maintained +F: Documentation/hwmon/smm665 +F: drivers/hwmon/smm665.c + SMSC47B397 HARDWARE MONITOR DRIVER M: "Mark M. Hoffman" <mhoffman@lightlink.com> L: lm-sensors@lm-sensors.org diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 4d382ae53092..c80ba4943b81 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -756,6 +756,21 @@ 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/SMM665B Six-Channel + Active DC Output Controller / Monitor. + + Other supported chips are SMM465, SMM665C, SMM764, and SMM766. + Support for those chips is untested. + + 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 9103bd6ea73a..db24fa1aa8b7 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -88,6 +88,7 @@ obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o obj-$(CONFIG_SENSORS_S3C) += s3c-hwmon.o obj-$(CONFIG_SENSORS_SHT15) += sht15.o obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o +obj-$(CONFIG_SENSORS_SMM665) += smm665.o obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o diff --git a/drivers/hwmon/smm665.c b/drivers/hwmon/smm665.c new file mode 100644 index 000000000000..425df5bccd45 --- /dev/null +++ b/drivers/hwmon/smm665.c @@ -0,0 +1,743 @@ +/* + * 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 also work for SMM465, SMM764, and SMM766, but is untested + * for those chips. 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> + +/* Internal reference voltage (VREF, x 1000 */ +#define SMM665_VREF_ADC_X1000 1250 + +/* module parameters */ +static int vref = SMM665_VREF_ADC_X1000; +module_param(vref, int, 0); +MODULE_PARM_DESC(vref, "Reference voltage in mV"); + +enum chips { smm465, smm665, smm665c, smm764, smm766 }; + +/* + * ADC channel addresses + */ +#define SMM665_MISC16_ADC_DATA_A 0x00 +#define SMM665_MISC16_ADC_DATA_B 0x01 +#define SMM665_MISC16_ADC_DATA_C 0x02 +#define SMM665_MISC16_ADC_DATA_D 0x03 +#define SMM665_MISC16_ADC_DATA_E 0x04 +#define SMM665_MISC16_ADC_DATA_F 0x05 +#define SMM665_MISC16_ADC_DATA_VDD 0x06 +#define SMM665_MISC16_ADC_DATA_12V 0x07 +#define SMM665_MISC16_ADC_DATA_INT_TEMP 0x08 +#define SMM665_MISC16_ADC_DATA_AIN1 0x09 +#define SMM665_MISC16_ADC_DATA_AIN2 0x0a + +/* + * Command registers + */ +#define SMM665_MISC8_CMD_STS 0x80 +#define SMM665_MISC8_STATUS1 0x81 +#define SMM665_MISC8_STATUSS2 0x82 +#define SMM665_MISC8_IO_POLARITY 0x83 +#define SMM665_MISC8_PUP_POLARITY 0x84 +#define SMM665_MISC8_ADOC_STATUS1 0x85 +#define SMM665_MISC8_ADOC_STATUS2 0x86 +#define SMM665_MISC8_WRITE_PROT 0x87 +#define SMM665_MISC8_STS_TRACK 0x88 + +/* + * Configuration registers and register groups + */ +#define SMM665_ADOC_ENABLE 0x0d +#define SMM665_LIMIT_BASE 0x80 /* First limit register */ + +/* + * 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 + +/* + * Equations given by chip manufacturer to calculate voltage/temperature values + * vref = Reference voltage on VREF_ADC pin (module parameter) + * adc = 10bit ADC value read back from registers + */ + +/* Voltage A-F and VDD */ +#define SMM665_VMON_ADC_TO_VOLTS(adc) ((adc) * vref / 256) + +/* Voltage 12VIN */ +#define SMM665_12VIN_ADC_TO_VOLTS(adc) ((adc) * vref * 3 / 256) + +/* Voltage AIN1, AIN2 */ +#define SMM665_AIN_ADC_TO_VOLTS(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 + +/* + * Chip dependent ADC conversion time, in uS + */ +#define SMM665_ADC_WAIT_SMM665 70 +#define SMM665_ADC_WAIT_SMM766 185 + +struct smm665_data { + enum chips type; + int conversion_time; /* ADC conversion time */ + 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 */ + /* The following values are in mV */ + int critical_min_limit[SMM665_NUM_ADC]; + int alarm_min_limit[SMM665_NUM_ADC]; + int critical_max_limit[SMM665_NUM_ADC]; + int alarm_max_limit[SMM665_NUM_ADC]; + 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 smm665_data *data, int adc) +{ + struct i2c_client *client = data->cmdreg; + int rv; + int radc; + + /* + * Algorithm for reading ADC, per SMM665 datasheet + * + * {[S][addr][W][Ack]} {[offset][Ack]} {[S][addr][R][Nack]} + * [wait conversion time] + * {[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 != -ENXIO) { + /* + * We expect ENXIO to reflect NACK + * (per Documentation/i2c/fault-codes). + * Everything else is an error. + */ + dev_dbg(&client->dev, + "Unexpected return code %d when setting ADC index", rv); + return (rv < 0) ? rv : -EIO; + } + + udelay(data->conversion_time); + + /* + * 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) { + dev_dbg(&client->dev, "Failed to read ADC value: error %d", rv); + return -1; + } + /* + * 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) { + dev_dbg(&client->dev, "Unexpected RADC: Expected %d got %d", + adc, radc); + return -EIO; + } + /* + * Chip replies with H/L, while SMBus expects L/H. + * Thus, byte order is reversed, and we have to swap + * the result. + */ + rv = swab16(rv) & SMM665_ADC_MASK; + + 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); + struct smm665_data *ret = data; + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { + int i, val; + + /* + * read status registers + */ + val = smm665_read16(client, SMM665_MISC8_STATUS1); + if (unlikely(val < 0)) { + ret = ERR_PTR(val); + goto abort; + } + data->faults = val; + + /* Read adc registers */ + for (i = 0; i < SMM665_NUM_ADC; i++) { + val = smm665_read_adc(data, i); + if (unlikely(val < 0)) { + ret = ERR_PTR(val); + goto abort; + } + data->adc[i] = val; + } + data->last_updated = jiffies; + data->valid = 1; + } +abort: + mutex_unlock(&data->update_lock); + return ret; +} + +/* 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(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(adcval & SMM665_ADC_MASK); + break; + + case SMM665_MISC16_ADC_DATA_AIN1: + case SMM665_MISC16_ADC_DATA_AIN2: + val = SMM665_AIN_ADC_TO_VOLTS(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; +} + +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->alarm_min_limit[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->alarm_max_limit[index]; +} + +static int smm665_get_lcrit(struct device *dev, int index) +{ + struct i2c_client *client = to_i2c_client(dev); + struct smm665_data *data = i2c_get_clientdata(client); + + return data->critical_min_limit[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->critical_max_limit[index]; +} + +static ssize_t smm665_show_crit_alarm(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct smm665_data *data = smm665_update_device(dev); + int val = 0; + + if (IS_ERR(data)) + return PTR_ERR(data); + + if (data->faults & (1 << attr->index)) + val = 1; + + return snprintf(buf, PAGE_SIZE, "%d\n", val); +} + +static ssize_t smm665_show_input(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct smm665_data *data = smm665_update_device(dev); + int adc = attr->index; + int val; + + if (IS_ERR(data)) + return PTR_ERR(data); + + val = smm665_convert(data->adc[adc], adc); + return snprintf(buf, PAGE_SIZE, "%d\n", val); +} + +#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(min); +SMM665_SHOW(max); +SMM665_SHOW(lcrit); +SMM665_SHOW(crit); + +/* 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 voltages lcrit */ +SMM665_ATTR(in1, lcrit, SMM665_MISC16_ADC_DATA_12V); +SMM665_ATTR(in2, lcrit, SMM665_MISC16_ADC_DATA_VDD); +SMM665_ATTR(in3, lcrit, SMM665_MISC16_ADC_DATA_A); +SMM665_ATTR(in4, lcrit, SMM665_MISC16_ADC_DATA_B); +SMM665_ATTR(in5, lcrit, SMM665_MISC16_ADC_DATA_C); +SMM665_ATTR(in6, lcrit, SMM665_MISC16_ADC_DATA_D); +SMM665_ATTR(in7, lcrit, SMM665_MISC16_ADC_DATA_E); +SMM665_ATTR(in8, lcrit, SMM665_MISC16_ADC_DATA_F); +SMM665_ATTR(in9, lcrit, SMM665_MISC16_ADC_DATA_AIN1); +SMM665_ATTR(in10, lcrit, SMM665_MISC16_ADC_DATA_AIN2); + +/* Input voltages crit */ +SMM665_ATTR(in1, crit, SMM665_MISC16_ADC_DATA_12V); +SMM665_ATTR(in2, crit, SMM665_MISC16_ADC_DATA_VDD); +SMM665_ATTR(in3, crit, SMM665_MISC16_ADC_DATA_A); +SMM665_ATTR(in4, crit, SMM665_MISC16_ADC_DATA_B); +SMM665_ATTR(in5, crit, SMM665_MISC16_ADC_DATA_C); +SMM665_ATTR(in6, crit, SMM665_MISC16_ADC_DATA_D); +SMM665_ATTR(in7, crit, SMM665_MISC16_ADC_DATA_E); +SMM665_ATTR(in8, crit, SMM665_MISC16_ADC_DATA_F); +SMM665_ATTR(in9, crit, SMM665_MISC16_ADC_DATA_AIN1); +SMM665_ATTR(in10, crit, SMM665_MISC16_ADC_DATA_AIN2); + +/* critical alarms */ +SMM665_ATTR(in1, crit_alarm, SMM665_FAULT_12V); +SMM665_ATTR(in2, crit_alarm, SMM665_FAULT_VDD); +SMM665_ATTR(in3, crit_alarm, SMM665_FAULT_A); +SMM665_ATTR(in4, crit_alarm, SMM665_FAULT_B); +SMM665_ATTR(in5, crit_alarm, SMM665_FAULT_C); +SMM665_ATTR(in6, crit_alarm, SMM665_FAULT_D); +SMM665_ATTR(in7, crit_alarm, SMM665_FAULT_E); +SMM665_ATTR(in8, crit_alarm, SMM665_FAULT_F); +SMM665_ATTR(in9, crit_alarm, SMM665_FAULT_AIN1); +SMM665_ATTR(in10, crit_alarm, 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, lcrit, SMM665_MISC16_ADC_DATA_INT_TEMP); +SMM665_ATTR(temp1, crit, SMM665_MISC16_ADC_DATA_INT_TEMP); +SMM665_ATTR(temp1, crit_alarm, 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_lcrit.dev_attr.attr, + &sensor_dev_attr_in1_crit.dev_attr.attr, + &sensor_dev_attr_in1_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_in2_crit.dev_attr.attr, + &sensor_dev_attr_in2_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_in3_crit.dev_attr.attr, + &sensor_dev_attr_in3_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_in4_crit.dev_attr.attr, + &sensor_dev_attr_in4_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_in5_crit.dev_attr.attr, + &sensor_dev_attr_in5_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_in6_crit.dev_attr.attr, + &sensor_dev_attr_in6_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_in7_crit.dev_attr.attr, + &sensor_dev_attr_in7_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_in8_crit.dev_attr.attr, + &sensor_dev_attr_in8_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_in9_crit.dev_attr.attr, + &sensor_dev_attr_in9_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_in10_crit.dev_attr.attr, + &sensor_dev_attr_in10_crit_alarm.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_lcrit.dev_attr.attr, + &sensor_dev_attr_temp1_crit.dev_attr.attr, + &sensor_dev_attr_temp1_crit_alarm.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; + + ret = -ENOMEM; + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + goto out_return; + + i2c_set_clientdata(client, data); + mutex_init(&data->update_lock); + + data->type = id->driver_data; + data->cmdreg = i2c_new_dummy(adapter, (client->addr & ~SMM665_REGMASK) + | SMM665_CMDREG_BASE); + if (!data->cmdreg) + goto out_kfree; + + switch (data->type) { + case smm465: + case smm665: + data->conversion_time = SMM665_ADC_WAIT_SMM665; + break; + case smm665c: + case smm764: + case smm766: + data->conversion_time = SMM665_ADC_WAIT_SMM766; + break; + } + + ret = -ENODEV; + if (i2c_smbus_read_byte_data(data->cmdreg, SMM665_MISC8_CMD_STS) < 0) + goto out_unregister; + + /* + * Read limits. + * + * Limit registers start with register SMM665_LIMIT_BASE. + * Each channel uses 8 registers, providing four limit values + * per channel. Each limit value requires two registers, with the + * high byte in the first register and the low byte in the second + * register. The first two limits are under limit values, followed + * by two over limit values. + * + * Limit register order matches the ADC register order, so we use + * ADC register defines 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. + */ + 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_unregister; + data->critical_min_limit[i] = data->alarm_min_limit[i] + = smm665_convert(val, i); + val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8 + 2); + if (unlikely(val < 0)) + goto out_unregister; + if (smm665_is_critical(val)) + data->critical_min_limit[i] = smm665_convert(val, i); + else + data->alarm_min_limit[i] = smm665_convert(val, i); + val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8 + 4); + if (unlikely(val < 0)) + goto out_unregister; + data->critical_max_limit[i] = data->alarm_max_limit[i] + = smm665_convert(val, i); + val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8 + 6); + if (unlikely(val < 0)) + goto out_unregister; + if (smm665_is_critical(val)) + data->critical_max_limit[i] = smm665_convert(val, i); + else + data->alarm_max_limit[i] = smm665_convert(val, i); + } + + /* Register sysfs hooks */ + ret = sysfs_create_group(&client->dev.kobj, &smm665_group); + if (ret) + goto out_unregister; + + data->hwmon_dev = hwmon_device_register(&client->dev); + if (IS_ERR(data->hwmon_dev)) { + ret = PTR_ERR(data->hwmon_dev); + goto out_remove_group; + } + + return 0; + +out_remove_group: + sysfs_remove_group(&client->dev.kobj, &smm665_group); +out_unregister: + i2c_unregister_device(data->cmdreg); +out_kfree: + kfree(data); +out_return: + 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[] = { + {"smm465", smm465}, + {"smm665", smm665}, + {"smm665c", smm665c}, + {"smm764", smm764}, + {"smm766", smm766}, + {} +}; + +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); |