Add support for MAX6581, MAX6602, MAX6622, MAX6636, MAX6689, MAX6693,
MAX6694, MAX6697, MAX6698, and MAX6699 temperature sensors
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
v2:
- Add suppport for platform data and devicetree based chip initialization
- Drop S_IRUGOWU macro: s/S_IRUGOWU/S_IRUGO | S_IWUSR/
Documentation/devicetree/bindings/i2c/max6697.txt | 45 ++
Documentation/hwmon/max6697 | 57 ++
drivers/hwmon/Kconfig | 11 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/max6697.c | 634 +++++++++++++++++++++
include/linux/platform_data/max6697.h | 25 +
6 files changed, 773 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/max6697.txt
create mode 100644 Documentation/hwmon/max6697
create mode 100644 drivers/hwmon/max6697.c
create mode 100644 include/linux/platform_data/max6697.h
diff --git a/Documentation/devicetree/bindings/i2c/max6697.txt b/Documentation/devicetree/bindings/i2c/max6697.txt
new file mode 100644
index 0000000..3e867e2
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/max6697.txt
@@ -0,0 +1,45 @@
+max6697 properties
+
+Required properties:
+- compatible:
+ Should be one of
+ maxim,max6581
+ maxim,max6602
+ maxim,max6622
+ maxim,max6636
+ maxim,max6689
+ maxim,max6693
+ maxim,max6694
+ maxim,max6697
+ maxim,max6698
+ maxim,max6699
+- reg: I2C address
+
+Optional properties:
+- smbus-timeout-disable
+ Set to enable SMBus timeout
+- extended-range-enable
+ Only valid for MAX6581. Set to enable extended temperature range.
+- alert-mask
+ Alert bit mask. Alert disabled for bits set.
+- over-temperature-mask
+ Over temperature bit mask. Over temperature reporting disabled for
+ bits set.
+- resistance-cancellation
+ Boolean for all chips other than MAX6581. Enabled if set.
+ For MAX6581, resistance cancellation enabled for all channels if
+ specified as boolean, otherwise as per bit mask specified.
+- transistor-ideality
+ For MAX6581 only. Two values; first is bit mask, second is ideality
+ select value as per MAX6581 data sheet.
+
+Example:
+
+temp-sensor@1a {
+ compatible = "maxim,max6697";
+ reg = <0x1a>;
+ smbus-timeout-disable;
+ resistance-cancellation;
+ alert-mask = <0xff>;
+ over-temperature-mask = <0xff>;
+};
diff --git a/Documentation/hwmon/max6697 b/Documentation/hwmon/max6697
new file mode 100644
index 0000000..35fc2e9
--- /dev/null
+++ b/Documentation/hwmon/max6697
@@ -0,0 +1,57 @@
+Kernel driver max6697
+=====================
+
+Supported chips:
+ * Maxim MAX6581
+ Prefix: 'max6581'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6581.pdf
+ * Maxim MAX6602
+ Prefix: 'max6602'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6602.pdf
+ * Maxim MAX6622
+ Prefix: 'max6622'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6622.pdf
+ * Maxim MAX6636
+ Prefix: 'max6636'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6636.pdf
+ * Maxim MAX6689
+ Prefix: 'max6689'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6689.pdf
+ * Maxim MAX6693
+ Prefix: 'max6693'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6693.pdf
+ * Maxim MAX6694
+ Prefix: 'max6694'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6694.pdf
+ * Maxim MAX6697
+ Prefix: 'max6697'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6697.pdf
+ * Maxim MAX6698
+ Prefix: 'max6698'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6698.pdf
+ * Maxim MAX6699
+ Prefix: 'max6699'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6699.pdf
+
+Author:
+ Guenter Roeck <linux@xxxxxxxxxxxx>
+
+Description
+-----------
+
+This driver implements support for several MAX6697 compatible temperature sensor
+chips. The chips support one local temperature sensor plus four or six remote
+temperature sensors. Remote temperature sensors are diode-connected thermal
+transitors, except for MAX6698 which supports three diode-connected thermal
+transistors plus three thermistors in addition to the local temperature sensor.
+
+The driver provides the following sysfs attributes. temp1 is the local (chip)
+temperature, temp[2..n] are remote temperatures. The actually supported
+per-channel attributes are chip type and channel dependent.
+
+tempX_input ro remote temperature
+tempX_max rw remote temperature maximum threshold for alarm
+tempX_max_alarm ro remote temperature maximum threshold alarm
+tempX_crit rw remote temperature critical threshold for alarm
+tempX_crit_alarm ro remote temperature critical threshold alarm
+tempX_fault ro remote temperature diode fault
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index c4633de..14f7ac9 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -844,6 +844,17 @@ config SENSORS_MAX6650
This driver can also be built as a module. If so, the module
will be called max6650.
+config SENSORS_MAX6697
+ tristate "Maxim MAX6697 and compatibles"
+ depends on I2C
+ help
+ If you say yes here you get support for MAX6581, MAX6602, MAX6622,
+ MAX6636, MAX6689, MAX6693, MAX6694, MAX6697, MAX6698, and MAX6699
+ temperature sensor chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called max6697.
+
config SENSORS_MCP3021
tristate "Microchip MCP3021 and compatibles"
depends on I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 8d5fcb5..d23646d 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -98,6 +98,7 @@ obj-$(CONFIG_SENSORS_MAX197) += max197.o
obj-$(CONFIG_SENSORS_MAX6639) += max6639.o
obj-$(CONFIG_SENSORS_MAX6642) += max6642.o
obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
+obj-$(CONFIG_SENSORS_MAX6697) += max6697.o
obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o
obj-$(CONFIG_SENSORS_NTC_THERMISTOR) += ntc_thermistor.o
diff --git a/drivers/hwmon/max6697.c b/drivers/hwmon/max6697.c
new file mode 100644
index 0000000..597cb98
--- /dev/null
+++ b/drivers/hwmon/max6697.c
@@ -0,0 +1,634 @@
+/*
+ * Copyright (c) 2012 Guenter Roeck <linux@xxxxxxxxxxxx>
+ *
+ * based on max1668.c
+ * Copyright (c) 2011 David George <david.george@xxxxxxxxx>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+
+#include <linux/platform_data/max6697.h>
+
+enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694,
+ max6697, max6698, max6699 };
+
+/* Report local sensor as temp1 */
+
+static const u8 MAX6697_REG_TEMP[] = { 7, 1, 2, 3, 4, 5, 6, 8 };
+static const u8 MAX6697_REG_TEMP_EXT[] = {
+ 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 };
+static const u8 MAX6697_REG_MAX[] = {
+ 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 };
+static const u8 MAX6697_REG_CRIT[] = {
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 };
+
+#define MAX6697_REG_STAT(n) (0x44 + (n))
+
+#define MAX6697_REG_CONFIG 0x41
+#define MAX6581_CONF_EXTENDED (1 << 1)
+#define MAX6697_CONF_RESISTANCE (1 << 3)
+#define MAX6697_CONF_TIMEOUT (1 << 5)
+#define MAX6697_REG_ALERT_MASK 0x42
+#define MAX6697_REG_OVERT_MASK 0x43
+
+#define MAX6581_REG_RESISTANCE 0x4a
+#define MAX6581_REG_IDEALITY 0x4b
+#define MAX6581_REG_IDEALITY_SELECT 0x4c
+#define MAX6581_REG_OFFSET 0x4d
+#define MAX6581_REG_OFFSET_SELECT 0x4e
+
+struct max6697_chip_data {
+ int channels;
+ u32 have_ext;
+ u32 have_crit;
+ u32 have_fault;
+ const u8 *alarm_map;
+};
+
+struct max6697_data {
+ struct device *hwmon_dev;
+
+ enum chips type;
+ const struct max6697_chip_data *chip;
+
+ struct mutex update_lock;
+ unsigned long last_updated; /* In jiffies */
+ bool valid; /* true if following fields are valid */
+
+ /* 1x local and up to 7x remote */
+ u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */
+ u32 alarms;
+};
+
+/* Diode fault status bits on MAX6581 are right shifted by one bit */
+static const u8 max6581_alarm_map[] = {
+ 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15,
+ 16, 17, 18, 19, 20, 21, 22, 23 };
+
+static const struct max6697_chip_data max6697_chip_data[] = {
+ [max6581] = {
+ .channels = 8,
+ .have_crit = 0xff,
+ .have_ext = 0xfe,
+ .have_fault = 0xfe,
+ .alarm_map = max6581_alarm_map,
+ },
+ [max6602] = {
+ .channels = 5,
+ .have_crit = 0x12,
+ .have_ext = 0x02,
+ .have_fault = 0x1e,
+ },
+ [max6636] = {
+ .channels = 7,
+ .have_crit = 0x72,
+ .have_ext = 0x02,
+ .have_fault = 0x7e,
+ },
+ [max6622] = {
+ .channels = 5,
+ .have_crit = 0x12,
+ .have_ext = 0x02,
+ .have_fault = 0x1e,
+ },
+ [max6689] = {
+ .channels = 7,
+ .have_crit = 0x72,
+ .have_ext = 0x02,
+ .have_fault = 0x7e,
+ },
+ [max6693] = {
+ .channels = 7,
+ .have_crit = 0x72,
+ .have_ext = 0x02,
+ .have_fault = 0x7e,
+ },
+ [max6694] = {
+ .channels = 5,
+ .have_crit = 0x12,
+ .have_ext = 0x02,
+ .have_fault = 0x1e,
+ },
+ [max6697] = {
+ .channels = 7,
+ .have_crit = 0x72,
+ .have_ext = 0x02,
+ .have_fault = 0x7e,
+ },
+ [max6698] = {
+ .channels = 7,
+ .have_crit = 0x72,
+ .have_ext = 0x02,
+ .have_fault = 0x0e,
+ },
+ [max6699] = {
+ .channels = 5,
+ .have_crit = 0x12,
+ .have_ext = 0x02,
+ .have_fault = 0x1e,
+ },
+};
+
+static struct max6697_data *max6697_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct max6697_data *data = i2c_get_clientdata(client);
+ struct max6697_data *ret = data;
+ int val;
+ int i;
+
+ mutex_lock(&data->update_lock);
+
+ if (data->valid &&
+ !time_after(jiffies, data->last_updated + HZ + HZ / 2))
+ goto abort;
+
+ for (i = 0; i < data->chip->channels; i++) {
+ if (data->chip->have_ext & (1 << i)) {
+ val = i2c_smbus_read_byte_data(client,
+ MAX6697_REG_TEMP_EXT[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp[i][1] = val;
+ }
+
+ val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp[i][0] = val;
+
+ val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp[i][2] = val;
+
+ if (data->chip->have_crit & (1 << i)) {
+ val = i2c_smbus_read_byte_data(client,
+ MAX6697_REG_CRIT[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp[i][3] = val;
+ }
+ }
+
+ data->alarms = 0;
+ for (i = 0; i < 3; i++) {
+ val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i));
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->alarms = (data->alarms << 8) | val;
+ }
+
+ data->last_updated = jiffies;
+ data->valid = true;
+abort:
+ mutex_unlock(&data->update_lock);
+
+ return ret;
+}
+
+static ssize_t show_temp11(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int nr = to_sensor_dev_attr_2(devattr)->nr;
+ int index = to_sensor_dev_attr_2(devattr)->index;
+ struct max6697_data *data = max6697_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n",
+ ((data->temp[nr][index] << 3) |
+ (data->temp[nr][index + 1] >> 5)) * 125);
+}
+
+static ssize_t show_temp(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int nr = to_sensor_dev_attr_2(devattr)->nr;
+ int index = to_sensor_dev_attr_2(devattr)->index;
+ struct max6697_data *data = max6697_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%d\n", data->temp[nr][index] * 1000);
+}
+
+static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int index = to_sensor_dev_attr(attr)->index;
+ struct max6697_data *data = max6697_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ if (data->chip->alarm_map)
+ index = data->chip->alarm_map[index];
+
+ return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1);
+}
+
+static ssize_t set_temp(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr_2(devattr)->nr;
+ int index = to_sensor_dev_attr_2(devattr)->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct max6697_data *data = i2c_get_clientdata(client);
+ long temp;
+ int ret;
+
+ ret = kstrtol(buf, 10, &temp);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&data->update_lock);
+ data->temp[nr][index] = SENSORS_LIMIT(temp / 1000, 0, 127);
+ ret = i2c_smbus_write_byte_data(client,
+ index == 2 ? MAX6697_REG_MAX[nr]
+ : MAX6697_REG_CRIT[nr],
+ data->temp[nr][index]);
+ if (ret < 0)
+ count = ret;
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, 0, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 0, 2);
+static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 0, 3);
+
+static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, 1, 0);
+static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 1, 2);
+static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 1, 3);
+
+static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, 2, 0);
+static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 2, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 2, 3);
+
+static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp11, NULL, 3, 0);
+static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 3, 2);
+static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 3, 3);
+
+static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp11, NULL, 4, 0);
+static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 4, 2);
+static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 4, 3);
+
+static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp11, NULL, 5, 0);
+static SENSOR_DEVICE_ATTR_2(temp6_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 5, 2);
+static SENSOR_DEVICE_ATTR_2(temp6_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 5, 3);
+
+static SENSOR_DEVICE_ATTR_2(temp7_input, S_IRUGO, show_temp11, NULL, 6, 0);
+static SENSOR_DEVICE_ATTR_2(temp7_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 6, 2);
+static SENSOR_DEVICE_ATTR_2(temp7_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 6, 3);
+
+static SENSOR_DEVICE_ATTR_2(temp8_input, S_IRUGO, show_temp11, NULL, 7, 0);
+static SENSOR_DEVICE_ATTR_2(temp8_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 7, 2);
+static SENSOR_DEVICE_ATTR_2(temp8_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+ 7, 3);
+
+static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 22);
+static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 16);
+static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 17);
+static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 18);
+static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, 19);
+static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO, show_alarm, NULL, 20);
+static SENSOR_DEVICE_ATTR(temp7_max_alarm, S_IRUGO, show_alarm, NULL, 21);
+static SENSOR_DEVICE_ATTR(temp8_max_alarm, S_IRUGO, show_alarm, NULL, 23);
+
+static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14);
+static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 8);
+static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
+static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 10);
+static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO, show_alarm, NULL, 11);
+static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO, show_alarm, NULL, 12);
+static SENSOR_DEVICE_ATTR(temp7_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
+static SENSOR_DEVICE_ATTR(temp8_crit_alarm, S_IRUGO, show_alarm, NULL, 15);
+
+static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_alarm, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_alarm, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_alarm, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_alarm, NULL, 7);
+
+static struct attribute *max6697_attributes[] = {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_fault.dev_attr.attr,
+
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_max.dev_attr.attr,
+ &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_fault.dev_attr.attr,
+
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_max.dev_attr.attr,
+ &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp3_crit.dev_attr.attr,
+ &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp3_fault.dev_attr.attr,
+
+ &sensor_dev_attr_temp4_input.dev_attr.attr,
+ &sensor_dev_attr_temp4_max.dev_attr.attr,
+ &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp4_crit.dev_attr.attr,
+ &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp4_fault.dev_attr.attr,
+
+ &sensor_dev_attr_temp5_input.dev_attr.attr,
+ &sensor_dev_attr_temp5_max.dev_attr.attr,
+ &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp5_crit.dev_attr.attr,
+ &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp5_fault.dev_attr.attr,
+
+ &sensor_dev_attr_temp6_input.dev_attr.attr,
+ &sensor_dev_attr_temp6_max.dev_attr.attr,
+ &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp6_crit.dev_attr.attr,
+ &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp6_fault.dev_attr.attr,
+
+ &sensor_dev_attr_temp7_input.dev_attr.attr,
+ &sensor_dev_attr_temp7_max.dev_attr.attr,
+ &sensor_dev_attr_temp7_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp7_crit.dev_attr.attr,
+ &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp7_fault.dev_attr.attr,
+
+ &sensor_dev_attr_temp8_input.dev_attr.attr,
+ &sensor_dev_attr_temp8_max.dev_attr.attr,
+ &sensor_dev_attr_temp8_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp8_crit.dev_attr.attr,
+ &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp8_fault.dev_attr.attr,
+
+ NULL
+};
+
+static const struct attribute_group max6697_group = {
+ .attrs = max6697_attributes,
+};
+
+static void max6697_get_config_of(struct device_node *node,
+ struct max6697_platform_data *pdata)
+{
+ int len;
+ const __be32 *prop;
+
+ prop = of_get_property(node, "smbus-timeout-disable", &len);
+ if (prop)
+ pdata->smbus_timeout_disable = true;
+ prop = of_get_property(node, "extended_range_enable", &len);
+ if (prop)
+ pdata->extended_range_enable = true;
+ prop = of_get_property(node, "alert-mask", &len);
+ if (prop && len == sizeof(u32))
+ pdata->alert_mask = be32_to_cpu(prop[0]);
+ prop = of_get_property(node, "over-temperature-mask", &len);
+ if (prop && len == sizeof(u32))
+ pdata->over_temperature_mask = be32_to_cpu(prop[0]);
+ prop = of_get_property(node, "resistance-cancellation", &len);
+ if (prop) {
+ if (len == sizeof(u32))
+ pdata->resistance_cancellation = be32_to_cpu(prop[0]);
+ else
+ pdata->resistance_cancellation = 0xff;
+ }
+ prop = of_get_property(node, "transistor-ideality", &len);
+ if (prop && len == 2 * sizeof(u32)) {
+ pdata->ideality_mask = be32_to_cpu(prop[0]);
+ pdata->ideality_value = be32_to_cpu(prop[1]);
+ }
+}
+
+static int max6697_init_chip(struct i2c_client *client)
+{
+ struct max6697_data *data = i2c_get_clientdata(client);
+ struct max6697_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct max6697_platform_data p;
+ int ret;
+ u8 reg;
+
+ /*
+ * Don't touch configuration if neither platform data nor of
+ * configuration was specified.
+ */
+ if (!pdata && !client->dev.of_node)
+ return 0;
+
+ if (!pdata || client->dev.of_node) {
+ memset(&p, 0, sizeof(data));
+ max6697_get_config_of(client->dev.of_node, &p);
+ pdata = &p;
+ }
+
+ reg = 0;
+ if (pdata->smbus_timeout_disable)
+ reg |= MAX6697_CONF_TIMEOUT;
+ if (pdata->extended_range_enable && data->type == max6581)
+ reg |= MAX6581_CONF_EXTENDED;
+ if (pdata->resistance_cancellation && data->type != max6581)
+ reg |= MAX6697_CONF_RESISTANCE;
+
+ ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK,
+ pdata->alert_mask);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK,
+ pdata->over_temperature_mask);
+ if (ret < 0)
+ return ret;
+
+ if (data->type == max6581) {
+ ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE,
+ pdata->resistance_cancellation);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY,
+ pdata->ideality_mask);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(client,
+ MAX6581_REG_IDEALITY_SELECT,
+ pdata->ideality_value);
+ if (ret < 0)
+ return ret;
+ }
+ return ret;
+}
+
+static int max6697_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ struct device *dev = &client->dev;
+ struct max6697_data *data;
+ int i, err;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->type = id->driver_data;
+ data->chip = &max6697_chip_data[data->type];
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
+ err = max6697_init_chip(client);
+ if (err)
+ return err;
+
+ /* Register sysfs hooks */
+
+ for (i = 0; i < data->chip->channels; i++) {
+ err = sysfs_create_file(&dev->kobj,
+ max6697_attributes[i * 6]);
+ if (err)
+ goto error;
+ err = sysfs_create_file(&dev->kobj,
+ max6697_attributes[i * 6 + 1]);
+ if (err)
+ goto error;
+ err = sysfs_create_file(&dev->kobj,
+ max6697_attributes[i * 6 + 2]);
+ if (err)
+ goto error;
+
+ if (data->chip->have_crit & (1 << i)) {
+ err = sysfs_create_file(&dev->kobj,
+ max6697_attributes[i * 6 + 3]);
+ if (err)
+ goto error;
+ err = sysfs_create_file(&dev->kobj,
+ max6697_attributes[i * 6 + 4]);
+ if (err)
+ goto error;
+ }
+ if (data->chip->have_fault & (1 << i)) {
+ err = sysfs_create_file(&dev->kobj,
+ max6697_attributes[i * 6 + 5]);
+ if (err)
+ goto error;
+ }
+ }
+
+ data->hwmon_dev = hwmon_device_register(dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto error;
+ }
+
+ return 0;
+
+error:
+ sysfs_remove_group(&dev->kobj, &max6697_group);
+ return err;
+}
+
+static int max6697_remove(struct i2c_client *client)
+{
+ struct max6697_data *data = i2c_get_clientdata(client);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &max6697_group);
+
+ return 0;
+}
+
+static const struct i2c_device_id max6697_id[] = {
+ { "max6581", max6581 },
+ { "max6602", max6602 },
+ { "max6622", max6622 },
+ { "max6636", max6636 },
+ { "max6689", max6689 },
+ { "max6693", max6693 },
+ { "max6694", max6694 },
+ { "max6697", max6697 },
+ { "max6698", max6698 },
+ { "max6699", max6699 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max6697_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver max6697_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "max6697",
+ },
+ .probe = max6697_probe,
+ .remove = max6697_remove,
+ .id_table = max6697_id,
+};
+
+module_i2c_driver(max6697_driver);
+
+MODULE_AUTHOR("Guenter Roeck <linux@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("MAX6697 temperature sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/platform_data/max6697.h b/include/linux/platform_data/max6697.h
new file mode 100644
index 0000000..5a21b9b
--- /dev/null
+++ b/include/linux/platform_data/max6697.h
@@ -0,0 +1,25 @@
+/*
+ * max6697.h
+ * Copyright (c) 2012 Guenter Roeck <linux@xxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef MAX6697_H
+#define MAX6697_H
+
+#define MAX6697_MAX_CONFIG_REG 8
+
+struct max6697_platform_data {
+ bool smbus_timeout_disable;
+ bool extended_range_enable;
+ u8 alert_mask;
+ u8 over_temperature_mask;
+ u8 resistance_cancellation;
+ u8 ideality_mask;
+ u8 ideality_value;
+};
+
+#endif /* MAX6697_H */
--
1.7.9.7
--
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