This patch adds hardware monitoring support for Maxim MAX16065/MAX16066 flash-configurable system managers with nonvolatile fault registers. Signed-off-by: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx> --- Documentation/hwmon/max16065 | 69 ++++ drivers/hwmon/Kconfig | 10 + drivers/hwmon/Makefile | 1 + drivers/hwmon/max16065.c | 757 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 837 insertions(+), 0 deletions(-) create mode 100644 Documentation/hwmon/max16065 create mode 100644 drivers/hwmon/max16065.c diff --git a/Documentation/hwmon/max16065 b/Documentation/hwmon/max16065 new file mode 100644 index 0000000..5495868 --- /dev/null +++ b/Documentation/hwmon/max16065 @@ -0,0 +1,69 @@ +Kernel driver max16065 +====================== + +Supported chips: + * Maxim 16065/16066 + Prefixes: 'max16065', 'max16066' + Addresses scanned: - + Datasheet: + http://datasheets.maxim-ic.com/en/ds/MAX16065-MAX16066.pdf + +Author: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx> + + +Description +----------- + +[From datasheet] The MAX16065/MAX16066 flash-configurable system managers +monitor and sequence multiple system voltages. The MAX16065/MAX16066 can also +accurately monitor (+/-2.5%) one current channel using a dedicated high-side +current-sense amplifier. The MAX16065 manages up to twelve system voltages +simultaneously, and the MAX16066 manages up to eight supply voltages. + +Each monitored channel has its own low and high critical limits, plus an +additional limit which is configurable as either low or high secondary limit. + + +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 a MAX16065 at address 0x51 +on I2C bus #1: +$ echo max16065 0x51 > /sys/bus/i2c/devices/i2c-1/new_device + + +Sysfs entries +------------- + +in[0-7]_input Input voltage measurements. +in[8-11]_input Input voltage measurements; MAX16065 only. +in12_input Voltage on CSP (Current Sense Positive) pin. + Only if current sensing is enabled. + +in[0-7]_min Low warning limit. +in[8-11]_min Low warning limit; MAX16065 only + +in[0-7]_max High warning limit. +in[8-11]_max High warning limit; MAX16065 only + + Either low or high warning limits are supported + (depending on chip configuration), but not both. + +in[0-7]_lcrit Low critical limit. +in[8-11]_lcrit Low critical limit; MAX16065 only + +in[0-7]_crit High critical limit. +in[8-11]_crit High critical limit; MAX16065 only + +in[0-7]_alarm Input voltage alarm +in[8-11]_alarm Input voltage alarm; MAX16065 only + +curr1_input Current sense input; only if current sensing is enabled + Displayed current assumes 0.001 Ohm current sense + resistor. +curr1_alarm Overcurrent alarm diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 1bfb443..5ec8ee5 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -698,6 +698,16 @@ config SENSORS_MAX1111 This driver can also be built as a module. If so, the module will be called max1111. +config SENSORS_MAX16065 + tristate "Maxim MAX16065/MAX16066 System Manager" + depends on I2C + help + If you say yes here you get support for hardware monitoring + capabilities of the MAX16065/MAX16066 System Manager chips. + + This driver can also be built as a module. If so, the module + will be called max16065. + config SENSORS_MAX1619 tristate "Maxim MAX1619 sensor chip" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index bd0410e..7fba079 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -85,6 +85,7 @@ obj-$(CONFIG_SENSORS_LTC4215) += ltc4215.o obj-$(CONFIG_SENSORS_LTC4245) += ltc4245.o obj-$(CONFIG_SENSORS_LTC4261) += ltc4261.o obj-$(CONFIG_SENSORS_MAX1111) += max1111.o +obj-$(CONFIG_SENSORS_MAX16065) += max16065.o obj-$(CONFIG_SENSORS_MAX1619) += max1619.o obj-$(CONFIG_SENSORS_MAX6639) += max6639.o obj-$(CONFIG_SENSORS_MAX6650) += max6650.o diff --git a/drivers/hwmon/max16065.c b/drivers/hwmon/max16065.c new file mode 100644 index 0000000..9863099 --- /dev/null +++ b/drivers/hwmon/max16065.c @@ -0,0 +1,757 @@ +/* + * Driver for Maxim MAX16065/16066 12-Channel/8-Channel, Flash-Configurable + * System Managers with Nonvolatile Fault Registers + * + * Copyright (C) 2011 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. + * + * Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX16065-MAX16066.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> + +enum chips { max16056, max16066 }; + +/* + * Registers + */ +#define MAX16065_ADC(x) ((x) * 2) + +#define MAX16065_CURR_SENSE 0x18 +#define MAX16065_CSP_ADC 0x19 + +#define MAX16065_FAULT(x) (0x1b + (x)) + +#define MAX16065_SCALE_BASE 0x43 +#define MAX16065_CURR_CONTROL 0x47 +#define MAX16065_SECONDARY(x) (0x48 + (x) * 3) +#define MAX16065_CRIT(x) (0x49 + (x) * 3) +#define MAX16065_LCRIT(x) (0x4a + (x) * 3) + +#define MAX16065_SW_ENABLE 0x73 + +#define MAX16065_SW_ENABLED (1 << 0) /* Set if sequencing is enabled */ +#define MAX16065_WARNING_OV (1 << 3) /* Set if secondary threshold is OV + warning */ + +#define MAX16065_CURR_ENABLE (1 << 0) + +#define MAX16065_SECONDARY_THRESH(x) (((x) * 3) + 0x48) +#define MAX16065_OV_THRESH(x) (((x) * 3) + 0x49) +#define MAX16065_UV_THRESH(x) (((x) * 3) + 0x4a) + +#define MAX16065_NUM_ADC 12 +#define MAX16066_NUM_ADC 8 + +static const int max16065_adc_range[] = { 5560, 2780, 1390, 0 }; +static const int max16065_csp_adc_range[] = { 7000, 14000 }; + +/* ADC registers have 10 bit resolution. */ +#define ADC_TO_MV(x, r) (((x) * (r)) / 1024) + +/* + * Limit registers have 8 bit resolution and match upper 8 bits of ADC + * registers. + */ +#define LIMIT_TO_MV(x, r) ((x) * (r) / 256) +#define MV_TO_LIMIT(x, r) ((r) ? ((x) * 256 / (r)) : 0) + +#define ADC_TO_CURR(x, g) ((x) * 1400000 / ((g) * 255)) + +struct max16065_data { + enum chips type; + struct device *hwmon_dev; + struct mutex update_lock; + bool valid; + unsigned long last_updated; /* in jiffies */ + int num_adc; + int curr_gain; + /* limits are in mV */ + bool secondary_is_max; /* secondary limits reflect max */ + int secondary[MAX16065_NUM_ADC]; + int lcrit[MAX16065_NUM_ADC]; + int crit[MAX16065_NUM_ADC]; + int range[MAX16065_NUM_ADC + 1];/* voltage range */ + int adc[MAX16065_NUM_ADC + 1]; /* adc values (raw) including csp_adc */ + int curr_sense; + int fault[2]; +}; + +/* + * max16065_read_adc() + * + * Read 16 bit value from <reg>, <reg+1>. + * Upper 8 bits are in <reg>, lower 2 bits are in bits 7:6 of <reg+1>. + */ +static int max16065_read_adc(struct i2c_client *client, int reg) +{ + int rv, val; + + rv = i2c_smbus_read_byte_data(client, reg); + if (rv < 0) + return rv; + val = rv << 2; + rv = i2c_smbus_read_byte_data(client, reg + 1); + if (rv < 0) + return rv; + val |= rv >> 6; + return val; +} + +static struct max16065_data *max16065_update_device(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + + mutex_lock(&data->update_lock); + if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { + int i; + + for (i = 0; i < MAX16065_NUM_ADC; i++) + data->adc[i] + = max16065_read_adc(client, MAX16065_ADC(i)); + data->adc[MAX16065_NUM_ADC] + = max16065_read_adc(client, MAX16065_CSP_ADC); + data->curr_sense + = i2c_smbus_read_byte_data(client, MAX16065_CURR_SENSE); + + for (i = 0; i < 2; i++) + data->fault[i] + = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i)); + + data->last_updated = jiffies; + data->valid = 1; + } + mutex_unlock(&data->update_lock); + return data; +} + +static ssize_t max16065_show_alarm(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = max16065_update_device(dev); + int val = data->fault[attr2->nr]; + + if (val < 0) + return val; + + val &= (1 << attr2->index); + if (val) + i2c_smbus_write_byte_data(client, MAX16065_FAULT(attr2->nr), + val); + + return snprintf(buf, PAGE_SIZE, "%d\n", !!val); +} + +static ssize_t max16065_show_input(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct max16065_data *data = max16065_update_device(dev); + int adc = data->adc[attr->index]; + + if (adc < 0) + return adc; + + return snprintf(buf, PAGE_SIZE, "%d\n", + ADC_TO_MV(adc, data->range[attr->index])); +} + +static ssize_t max16065_show_current(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct max16065_data *data = max16065_update_device(dev); + + if (data->curr_sense < 0) + return data->curr_sense; + + return snprintf(buf, PAGE_SIZE, "%d\n", + ADC_TO_CURR(data->curr_sense, data->curr_gain)); +} + +static ssize_t max16065_set_lcrit(struct device *dev, + struct device_attribute *da, + const char *buf, size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + unsigned long val; + int err; + + err = strict_strtoul(buf, 10, &val); + if (err < 0) + return err; + mutex_lock(&data->update_lock); + data->lcrit[attr->index] = val; + i2c_smbus_write_byte_data(client, MAX16065_LCRIT(attr->index), + MV_TO_LIMIT(val, data->range[attr->index])); + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t max16065_show_lcrit(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + + return snprintf(buf, PAGE_SIZE, "%d\n", + data->lcrit[attr->index]); +} + +static ssize_t max16065_set_crit(struct device *dev, + struct device_attribute *da, + const char *buf, size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + unsigned long val; + int err; + + err = strict_strtoul(buf, 10, &val); + if (err < 0) + return err; + mutex_lock(&data->update_lock); + data->crit[attr->index] = val; + i2c_smbus_write_byte_data(client, MAX16065_CRIT(attr->index), + MV_TO_LIMIT(val, data->range[attr->index])); + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t max16065_show_crit(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + + return snprintf(buf, PAGE_SIZE, "%d\n", + data->crit[attr->index]); +} + +static ssize_t max16065_set_secondary(struct device *dev, + struct device_attribute *da, + const char *buf, size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + unsigned long val; + int err; + + err = strict_strtoul(buf, 10, &val); + if (err < 0) + return err; + mutex_lock(&data->update_lock); + data->secondary[attr->index] = val; + i2c_smbus_write_byte_data(client, MAX16065_SECONDARY(attr->index), + MV_TO_LIMIT(val, data->range[attr->index])); + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t max16065_show_secondary(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + + return snprintf(buf, PAGE_SIZE, "%d\n", + data->secondary[attr->index]); +} + +/* Construct a sensor_device_attribute structure for each register */ + +/* Input voltages */ +static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, max16065_show_input, NULL, 0); +static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, max16065_show_input, NULL, 1); +static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, max16065_show_input, NULL, 2); +static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, max16065_show_input, NULL, 3); +static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, max16065_show_input, NULL, 4); +static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, max16065_show_input, NULL, 5); +static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, max16065_show_input, NULL, 6); +static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, max16065_show_input, NULL, 7); +static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, max16065_show_input, NULL, 8); +static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, max16065_show_input, NULL, 9); +static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, max16065_show_input, NULL, 10); +static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, max16065_show_input, NULL, 11); +static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, max16065_show_input, NULL, 12); + +/* Input voltages lcrit */ +static SENSOR_DEVICE_ATTR(in0_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 0); +static SENSOR_DEVICE_ATTR(in1_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 1); +static SENSOR_DEVICE_ATTR(in2_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 2); +static SENSOR_DEVICE_ATTR(in3_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 3); +static SENSOR_DEVICE_ATTR(in4_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 4); +static SENSOR_DEVICE_ATTR(in5_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 5); +static SENSOR_DEVICE_ATTR(in6_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 6); +static SENSOR_DEVICE_ATTR(in7_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 7); +static SENSOR_DEVICE_ATTR(in8_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 8); +static SENSOR_DEVICE_ATTR(in9_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 9); +static SENSOR_DEVICE_ATTR(in10_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 10); +static SENSOR_DEVICE_ATTR(in11_lcrit, S_IWUSR | S_IRUGO, max16065_show_lcrit, + max16065_set_lcrit, 11); + +/* Input voltages crit */ +static SENSOR_DEVICE_ATTR(in0_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 0); +static SENSOR_DEVICE_ATTR(in1_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 1); +static SENSOR_DEVICE_ATTR(in2_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 2); +static SENSOR_DEVICE_ATTR(in3_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 3); +static SENSOR_DEVICE_ATTR(in4_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 4); +static SENSOR_DEVICE_ATTR(in5_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 5); +static SENSOR_DEVICE_ATTR(in6_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 6); +static SENSOR_DEVICE_ATTR(in7_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 7); +static SENSOR_DEVICE_ATTR(in8_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 8); +static SENSOR_DEVICE_ATTR(in9_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 9); +static SENSOR_DEVICE_ATTR(in10_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 10); +static SENSOR_DEVICE_ATTR(in11_crit, S_IWUSR | S_IRUGO, max16065_show_crit, + max16065_set_crit, 11); + +/* Input voltages min */ +static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 0); +static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 1); +static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 2); +static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 3); +static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 4); +static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 5); +static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 6); +static SENSOR_DEVICE_ATTR(in7_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 7); +static SENSOR_DEVICE_ATTR(in8_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 8); +static SENSOR_DEVICE_ATTR(in9_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 9); +static SENSOR_DEVICE_ATTR(in10_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 10); +static SENSOR_DEVICE_ATTR(in11_min, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 11); + +/* Input voltages max */ +static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 0); +static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 1); +static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 2); +static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 3); +static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 4); +static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 5); +static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 6); +static SENSOR_DEVICE_ATTR(in7_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 7); +static SENSOR_DEVICE_ATTR(in8_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 8); +static SENSOR_DEVICE_ATTR(in9_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 9); +static SENSOR_DEVICE_ATTR(in10_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 10); +static SENSOR_DEVICE_ATTR(in11_max, S_IWUSR | S_IRUGO, max16065_show_secondary, + max16065_set_secondary, 11); + +/* alarms */ +static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, max16065_show_alarm, NULL, 0, + 0); +static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, max16065_show_alarm, NULL, 0, + 1); +static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, max16065_show_alarm, NULL, 0, + 2); +static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, max16065_show_alarm, NULL, 0, + 3); +static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, max16065_show_alarm, NULL, 0, + 4); +static SENSOR_DEVICE_ATTR_2(in5_alarm, S_IRUGO, max16065_show_alarm, NULL, 0, + 5); +static SENSOR_DEVICE_ATTR_2(in6_alarm, S_IRUGO, max16065_show_alarm, NULL, 0, + 6); +static SENSOR_DEVICE_ATTR_2(in7_alarm, S_IRUGO, max16065_show_alarm, NULL, 0, + 7); +static SENSOR_DEVICE_ATTR_2(in8_alarm, S_IRUGO, max16065_show_alarm, NULL, 1, + 0); +static SENSOR_DEVICE_ATTR_2(in9_alarm, S_IRUGO, max16065_show_alarm, NULL, 1, + 1); +static SENSOR_DEVICE_ATTR_2(in10_alarm, S_IRUGO, max16065_show_alarm, NULL, 1, + 2); +static SENSOR_DEVICE_ATTR_2(in11_alarm, S_IRUGO, max16065_show_alarm, NULL, 1, + 3); + +/* Current and alarm */ +static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, max16065_show_current, NULL, 0); +static SENSOR_DEVICE_ATTR_2(curr1_alarm, S_IRUGO, max16065_show_alarm, NULL, + 1, 4); + +/* + * Finally, construct an array of pointers to members of the above objects, + * as required for sysfs_create_group() + */ +static struct attribute *max16065_basic_attributes[] = { + &sensor_dev_attr_in0_input.dev_attr.attr, + &sensor_dev_attr_in0_lcrit.dev_attr.attr, + &sensor_dev_attr_in0_crit.dev_attr.attr, + &sensor_dev_attr_in0_alarm.dev_attr.attr, + + &sensor_dev_attr_in1_input.dev_attr.attr, + &sensor_dev_attr_in1_lcrit.dev_attr.attr, + &sensor_dev_attr_in1_crit.dev_attr.attr, + &sensor_dev_attr_in1_alarm.dev_attr.attr, + + &sensor_dev_attr_in2_input.dev_attr.attr, + &sensor_dev_attr_in2_lcrit.dev_attr.attr, + &sensor_dev_attr_in2_crit.dev_attr.attr, + &sensor_dev_attr_in2_alarm.dev_attr.attr, + + &sensor_dev_attr_in3_input.dev_attr.attr, + &sensor_dev_attr_in3_lcrit.dev_attr.attr, + &sensor_dev_attr_in3_crit.dev_attr.attr, + &sensor_dev_attr_in3_alarm.dev_attr.attr, + + &sensor_dev_attr_in4_input.dev_attr.attr, + &sensor_dev_attr_in4_lcrit.dev_attr.attr, + &sensor_dev_attr_in4_crit.dev_attr.attr, + &sensor_dev_attr_in4_alarm.dev_attr.attr, + + &sensor_dev_attr_in5_input.dev_attr.attr, + &sensor_dev_attr_in5_lcrit.dev_attr.attr, + &sensor_dev_attr_in5_crit.dev_attr.attr, + &sensor_dev_attr_in5_alarm.dev_attr.attr, + + &sensor_dev_attr_in6_input.dev_attr.attr, + &sensor_dev_attr_in6_lcrit.dev_attr.attr, + &sensor_dev_attr_in6_crit.dev_attr.attr, + &sensor_dev_attr_in6_alarm.dev_attr.attr, + + &sensor_dev_attr_in7_input.dev_attr.attr, + &sensor_dev_attr_in7_lcrit.dev_attr.attr, + &sensor_dev_attr_in7_crit.dev_attr.attr, + &sensor_dev_attr_in7_alarm.dev_attr.attr, + + NULL, +}; + +static struct attribute *max16065_current_attributes[] = { + &sensor_dev_attr_in12_input.dev_attr.attr, + &sensor_dev_attr_curr1_input.dev_attr.attr, + &sensor_dev_attr_curr1_alarm.dev_attr.attr, + NULL, +}; + +static struct attribute *max16065_extended_attributes[] = { + &sensor_dev_attr_in8_input.dev_attr.attr, + &sensor_dev_attr_in8_lcrit.dev_attr.attr, + &sensor_dev_attr_in8_crit.dev_attr.attr, + &sensor_dev_attr_in8_alarm.dev_attr.attr, + + &sensor_dev_attr_in9_input.dev_attr.attr, + &sensor_dev_attr_in9_lcrit.dev_attr.attr, + &sensor_dev_attr_in9_crit.dev_attr.attr, + &sensor_dev_attr_in9_alarm.dev_attr.attr, + + &sensor_dev_attr_in10_input.dev_attr.attr, + &sensor_dev_attr_in10_lcrit.dev_attr.attr, + &sensor_dev_attr_in10_crit.dev_attr.attr, + &sensor_dev_attr_in10_alarm.dev_attr.attr, + + &sensor_dev_attr_in11_input.dev_attr.attr, + &sensor_dev_attr_in11_lcrit.dev_attr.attr, + &sensor_dev_attr_in11_crit.dev_attr.attr, + &sensor_dev_attr_in11_alarm.dev_attr.attr, + + NULL, +}; + +static struct attribute *max16065_basic_min_attributes[] = { + &sensor_dev_attr_in0_min.dev_attr.attr, + &sensor_dev_attr_in1_min.dev_attr.attr, + &sensor_dev_attr_in2_min.dev_attr.attr, + &sensor_dev_attr_in3_min.dev_attr.attr, + &sensor_dev_attr_in4_min.dev_attr.attr, + &sensor_dev_attr_in5_min.dev_attr.attr, + &sensor_dev_attr_in6_min.dev_attr.attr, + &sensor_dev_attr_in7_min.dev_attr.attr, + NULL, +}; + +static struct attribute *max16065_extended_min_attributes[] = { + &sensor_dev_attr_in8_min.dev_attr.attr, + &sensor_dev_attr_in9_min.dev_attr.attr, + &sensor_dev_attr_in10_min.dev_attr.attr, + &sensor_dev_attr_in11_min.dev_attr.attr, + NULL, +}; + +static struct attribute *max16065_basic_max_attributes[] = { + &sensor_dev_attr_in0_max.dev_attr.attr, + &sensor_dev_attr_in1_max.dev_attr.attr, + &sensor_dev_attr_in2_max.dev_attr.attr, + &sensor_dev_attr_in3_max.dev_attr.attr, + &sensor_dev_attr_in4_max.dev_attr.attr, + &sensor_dev_attr_in5_max.dev_attr.attr, + &sensor_dev_attr_in6_max.dev_attr.attr, + &sensor_dev_attr_in7_max.dev_attr.attr, + NULL, +}; + +static struct attribute *max16065_extended_max_attributes[] = { + &sensor_dev_attr_in8_max.dev_attr.attr, + &sensor_dev_attr_in9_max.dev_attr.attr, + &sensor_dev_attr_in10_max.dev_attr.attr, + &sensor_dev_attr_in11_max.dev_attr.attr, + NULL, +}; + +static const struct attribute_group max16065_basic_group = { + .attrs = max16065_basic_attributes, +}; + +static const struct attribute_group max16065_current_group = { + .attrs = max16065_current_attributes, +}; + +static const struct attribute_group max16065_extended_group = { + .attrs = max16065_extended_attributes, +}; + +static const struct attribute_group max16065_basic_min_group = { + .attrs = max16065_basic_min_attributes, +}; + +static const struct attribute_group max16065_extended_min_group = { + .attrs = max16065_extended_min_attributes, +}; + +static const struct attribute_group max16065_basic_max_group = { + .attrs = max16065_basic_max_attributes, +}; + +static const struct attribute_group max16065_extended_max_group = { + .attrs = max16065_extended_max_attributes, +}; + +static void max16065_cleanup(struct i2c_client *client) +{ + sysfs_remove_group(&client->dev.kobj, &max16065_extended_max_group); + sysfs_remove_group(&client->dev.kobj, &max16065_extended_min_group); + sysfs_remove_group(&client->dev.kobj, &max16065_extended_group); + sysfs_remove_group(&client->dev.kobj, &max16065_basic_max_group); + sysfs_remove_group(&client->dev.kobj, &max16065_basic_min_group); + sysfs_remove_group(&client->dev.kobj, &max16065_current_group); + sysfs_remove_group(&client->dev.kobj, &max16065_basic_group); +} + +static int max16065_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = client->adapter; + struct max16065_data *data; + int i, j, val, ret; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + i2c_set_clientdata(client, data); + mutex_init(&data->update_lock); + + data->num_adc = id->driver_data; + + val = i2c_smbus_read_byte_data(client, MAX16065_SW_ENABLE); + if (unlikely(val < 0)) { + ret = val; + goto out; + } + + data->secondary_is_max = !!(val & MAX16065_WARNING_OV); + + /* Read scale registers, convert to range */ + for (i = 0; i < data->num_adc / 4; i++) { + val = i2c_smbus_read_byte_data(client, MAX16065_SCALE_BASE + i); + if (unlikely(val < 0)) { + ret = val; + goto out; + } + for (j = 0; j < 4; j++) { + data->range[i * 4 + j] = + max16065_adc_range[(val >> (j * 2)) & 0x3]; + } + } + + /* Read limits */ + for (i = 0; i < data->num_adc; i++) { + val = i2c_smbus_read_byte_data(client, MAX16065_LCRIT(i)); + if (unlikely(val < 0)) { + ret = val; + goto out; + } + data->lcrit[i] = LIMIT_TO_MV(val, data->range[i]); + + val = i2c_smbus_read_byte_data(client, MAX16065_CRIT(i)); + if (unlikely(val < 0)) { + ret = val; + goto out; + } + data->crit[i] = LIMIT_TO_MV(val, data->range[i]); + + val = i2c_smbus_read_byte_data(client, MAX16065_SECONDARY(i)); + if (unlikely(val < 0)) { + ret = val; + goto out; + } + data->secondary[i] = LIMIT_TO_MV(val, data->range[i]); + } + + /* Register sysfs hooks */ + ret = sysfs_create_group(&client->dev.kobj, &max16065_basic_group); + if (ret) + goto out; + + ret = sysfs_create_group(&client->dev.kobj, + data->secondary_is_max ? + &max16065_basic_max_group : + &max16065_basic_min_group); + if (ret) + goto out; + + val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL); + if (unlikely(val < 0)) { + ret = val; + goto out; + } + if (val & MAX16065_CURR_ENABLE) { + /* Current gain is 6, 12, 24, 48 based on values in bit 2,3 */ + data->curr_gain = 6 << ((val >> 2) & 0x03); + data->range[MAX16065_NUM_ADC] + = max16065_csp_adc_range[(val >> 1) & 1]; + ret = sysfs_create_group(&client->dev.kobj, + &max16065_current_group); + if (ret) + goto out; + } + + if (data->num_adc == MAX16065_NUM_ADC) { + ret = sysfs_create_group(&client->dev.kobj, + &max16065_extended_group); + if (ret) + goto out; + ret = sysfs_create_group(&client->dev.kobj, + data->secondary_is_max ? + &max16065_extended_max_group : + &max16065_extended_min_group); + if (ret) + goto out; + + } + + data->hwmon_dev = hwmon_device_register(&client->dev); + if (IS_ERR(data->hwmon_dev)) { + ret = PTR_ERR(data->hwmon_dev); + goto out; + } + return 0; + +out: + max16065_cleanup(client); + kfree(data); + return ret; +} + +static int max16065_remove(struct i2c_client *client) +{ + struct max16065_data *data = i2c_get_clientdata(client); + + hwmon_device_unregister(data->hwmon_dev); + max16065_cleanup(client); + kfree(data); + + return 0; +} + +static const struct i2c_device_id max16065_id[] = { + {"max16065", MAX16065_NUM_ADC}, + {"max16066", MAX16066_NUM_ADC}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, max16065_id); + +/* This is the driver that will be inserted */ +static struct i2c_driver max16065_driver = { + .driver = { + .name = "max16065", + }, + .probe = max16065_probe, + .remove = max16065_remove, + .id_table = max16065_id, +}; + +static int __init max16065_init(void) +{ + return i2c_add_driver(&max16065_driver); +} + +static void __exit max16065_exit(void) +{ + i2c_del_driver(&max16065_driver); +} + +MODULE_AUTHOR("Guenter Roeck"); +MODULE_DESCRIPTION("MAX16065 driver"); +MODULE_LICENSE("GPL"); + +module_init(max16065_init); +module_exit(max16065_exit); -- 1.7.3.1 _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
