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-rw-r--r--drivers/hwmon/Kconfig32
-rw-r--r--drivers/hwmon/Makefile3
-rw-r--r--drivers/hwmon/asus_atk0110.c1009
-rw-r--r--drivers/hwmon/g760a.c272
-rw-r--r--drivers/hwmon/hp_accel.c1
-rw-r--r--drivers/hwmon/lm95241.c112
-rw-r--r--drivers/hwmon/sht15.c692
7 files changed, 2055 insertions, 66 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index ce52bf2f235..d73f5f473e3 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -248,6 +248,18 @@ config SENSORS_ASB100
This driver can also be built as a module. If so, the module
will be called asb100.
+config SENSORS_ATK0110
+ tristate "ASUS ATK0110 ACPI hwmon"
+ depends on X86 && ACPI && EXPERIMENTAL
+ help
+ If you say yes here you get support for the ACPI hardware
+ monitoring interface found in many ASUS motherboards. This
+ driver will provide readings of fans, voltages and temperatures
+ through the system firmware.
+
+ This driver can also be built as a module. If so, the module
+ will be called asus_atk0110.
+
config SENSORS_ATXP1
tristate "Attansic ATXP1 VID controller"
depends on I2C && EXPERIMENTAL
@@ -358,6 +370,16 @@ config SENSORS_FSCHMD
This driver can also be built as a module. If so, the module
will be called fschmd.
+config SENSORS_G760A
+ tristate "GMT G760A"
+ depends on I2C
+ help
+ If you say yes here you get support for Global Mixed-mode
+ Technology Inc G760A fan speed PWM controller chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called g760a.
+
config SENSORS_GL518SM
tristate "Genesys Logic GL518SM"
depends on I2C
@@ -670,6 +692,16 @@ config SENSORS_PCF8591
These devices are hard to detect and rarely found on mainstream
hardware. If unsure, say N.
+config SENSORS_SHT15
+ tristate "Sensiron humidity and temperature sensors. SHT15 and compat."
+ depends on GENERIC_GPIO
+ help
+ If you say yes here you get support for the Sensiron SHT10, SHT11,
+ SHT15, SHT71, SHT75 humidity and temperature sensors.
+
+ This driver can also be built as a module. If so, the module
+ will be called sht15.
+
config SENSORS_SIS5595
tristate "Silicon Integrated Systems Corp. SiS5595"
depends on PCI
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 3a6b1f06f8f..0ae26984ba4 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_SENSORS_ADT7475) += adt7475.o
obj-$(CONFIG_SENSORS_APPLESMC) += applesmc.o
obj-$(CONFIG_SENSORS_AMS) += ams/
+obj-$(CONFIG_SENSORS_ATK0110) += asus_atk0110.o
obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o
obj-$(CONFIG_SENSORS_CORETEMP) += coretemp.o
obj-$(CONFIG_SENSORS_DME1737) += dme1737.o
@@ -42,6 +43,7 @@ obj-$(CONFIG_SENSORS_F75375S) += f75375s.o
obj-$(CONFIG_SENSORS_FSCHER) += fscher.o
obj-$(CONFIG_SENSORS_FSCHMD) += fschmd.o
obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o
+obj-$(CONFIG_SENSORS_G760A) += g760a.o
obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
obj-$(CONFIG_SENSORS_ULTRA45) += ultra45_env.o
@@ -74,6 +76,7 @@ obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
obj-$(CONFIG_SENSORS_PC87427) += pc87427.o
obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
+obj-$(CONFIG_SENSORS_SHT15) += sht15.o
obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o
obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o
obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o
diff --git a/drivers/hwmon/asus_atk0110.c b/drivers/hwmon/asus_atk0110.c
new file mode 100644
index 00000000000..0897edef257
--- /dev/null
+++ b/drivers/hwmon/asus_atk0110.c
@@ -0,0 +1,1009 @@
+/*
+ * Copyright (C) 2007-2009 Luca Tettamanti <kronos.it@gmail.com>
+ *
+ * This file is released under the GPLv2
+ * See COPYING in the top level directory of the kernel tree.
+ */
+
+#include <linux/kernel.h>
+#include <linux/hwmon.h>
+#include <linux/list.h>
+#include <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/acpixf.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/acpi_bus.h>
+
+
+#define ATK_HID "ATK0110"
+
+/* Minimum time between readings, enforced in order to avoid
+ * hogging the CPU.
+ */
+#define CACHE_TIME HZ
+
+#define BOARD_ID "MBIF"
+#define METHOD_ENUMERATE "GGRP"
+#define METHOD_READ "GITM"
+#define METHOD_WRITE "SITM"
+#define METHOD_OLD_READ_TMP "RTMP"
+#define METHOD_OLD_READ_VLT "RVLT"
+#define METHOD_OLD_READ_FAN "RFAN"
+#define METHOD_OLD_ENUM_TMP "TSIF"
+#define METHOD_OLD_ENUM_VLT "VSIF"
+#define METHOD_OLD_ENUM_FAN "FSIF"
+
+#define ATK_MUX_HWMON 0x00000006ULL
+
+#define ATK_CLASS_MASK 0xff000000ULL
+#define ATK_CLASS_FREQ_CTL 0x03000000ULL
+#define ATK_CLASS_FAN_CTL 0x04000000ULL
+#define ATK_CLASS_HWMON 0x06000000ULL
+
+#define ATK_TYPE_MASK 0x00ff0000ULL
+#define HWMON_TYPE_VOLT 0x00020000ULL
+#define HWMON_TYPE_TEMP 0x00030000ULL
+#define HWMON_TYPE_FAN 0x00040000ULL
+
+#define HWMON_SENSOR_ID_MASK 0x0000ffffULL
+
+enum atk_pack_member {
+ HWMON_PACK_FLAGS,
+ HWMON_PACK_NAME,
+ HWMON_PACK_LIMIT1,
+ HWMON_PACK_LIMIT2,
+ HWMON_PACK_ENABLE
+};
+
+/* New package format */
+#define _HWMON_NEW_PACK_SIZE 7
+#define _HWMON_NEW_PACK_FLAGS 0
+#define _HWMON_NEW_PACK_NAME 1
+#define _HWMON_NEW_PACK_UNK1 2
+#define _HWMON_NEW_PACK_UNK2 3
+#define _HWMON_NEW_PACK_LIMIT1 4
+#define _HWMON_NEW_PACK_LIMIT2 5
+#define _HWMON_NEW_PACK_ENABLE 6
+
+/* Old package format */
+#define _HWMON_OLD_PACK_SIZE 5
+#define _HWMON_OLD_PACK_FLAGS 0
+#define _HWMON_OLD_PACK_NAME 1
+#define _HWMON_OLD_PACK_LIMIT1 2
+#define _HWMON_OLD_PACK_LIMIT2 3
+#define _HWMON_OLD_PACK_ENABLE 4
+
+
+struct atk_data {
+ struct device *hwmon_dev;
+ acpi_handle atk_handle;
+ struct acpi_device *acpi_dev;
+
+ bool old_interface;
+
+ /* old interface */
+ acpi_handle rtmp_handle;
+ acpi_handle rvlt_handle;
+ acpi_handle rfan_handle;
+ /* new inteface */
+ acpi_handle enumerate_handle;
+ acpi_handle read_handle;
+
+ int voltage_count;
+ int temperature_count;
+ int fan_count;
+ struct list_head sensor_list;
+};
+
+
+typedef ssize_t (*sysfs_show_func)(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static const struct acpi_device_id atk_ids[] = {
+ {ATK_HID, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, atk_ids);
+
+#define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */
+
+struct atk_sensor_data {
+ struct list_head list;
+ struct atk_data *data;
+ struct device_attribute label_attr;
+ struct device_attribute input_attr;
+ struct device_attribute limit1_attr;
+ struct device_attribute limit2_attr;
+ char label_attr_name[ATTR_NAME_SIZE];
+ char input_attr_name[ATTR_NAME_SIZE];
+ char limit1_attr_name[ATTR_NAME_SIZE];
+ char limit2_attr_name[ATTR_NAME_SIZE];
+ u64 id;
+ u64 type;
+ u64 limit1;
+ u64 limit2;
+ u64 cached_value;
+ unsigned long last_updated; /* in jiffies */
+ bool is_valid;
+ char const *acpi_name;
+};
+
+struct atk_acpi_buffer_u64 {
+ union acpi_object buf;
+ u64 value;
+};
+
+static int atk_add(struct acpi_device *device);
+static int atk_remove(struct acpi_device *device, int type);
+static void atk_print_sensor(struct atk_data *data, union acpi_object *obj);
+static int atk_read_value(struct atk_sensor_data *sensor, u64 *value);
+static void atk_free_sensors(struct atk_data *data);
+
+static struct acpi_driver atk_driver = {
+ .name = ATK_HID,
+ .class = "hwmon",
+ .ids = atk_ids,
+ .ops = {
+ .add = atk_add,
+ .remove = atk_remove,
+ },
+};
+
+#define input_to_atk_sensor(attr) \
+ container_of(attr, struct atk_sensor_data, input_attr)
+
+#define label_to_atk_sensor(attr) \
+ container_of(attr, struct atk_sensor_data, label_attr)
+
+#define limit1_to_atk_sensor(attr) \
+ container_of(attr, struct atk_sensor_data, limit1_attr)
+
+#define limit2_to_atk_sensor(attr) \
+ container_of(attr, struct atk_sensor_data, limit2_attr)
+
+static ssize_t atk_input_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atk_sensor_data *s = input_to_atk_sensor(attr);
+ u64 value;
+ int err;
+
+ err = atk_read_value(s, &value);
+ if (err)
+ return err;
+
+ if (s->type == HWMON_TYPE_TEMP)
+ /* ACPI returns decidegree */
+ value *= 100;
+
+ return sprintf(buf, "%llu\n", value);
+}
+
+static ssize_t atk_label_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atk_sensor_data *s = label_to_atk_sensor(attr);
+
+ return sprintf(buf, "%s\n", s->acpi_name);
+}
+
+static ssize_t atk_limit1_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atk_sensor_data *s = limit1_to_atk_sensor(attr);
+ u64 value = s->limit1;
+
+ if (s->type == HWMON_TYPE_TEMP)
+ value *= 100;
+
+ return sprintf(buf, "%lld\n", value);
+}
+
+static ssize_t atk_limit2_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atk_sensor_data *s = limit2_to_atk_sensor(attr);
+ u64 value = s->limit2;
+
+ if (s->type == HWMON_TYPE_TEMP)
+ value *= 100;
+
+ return sprintf(buf, "%lld\n", value);
+}
+
+static ssize_t atk_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "atk0110\n");
+}
+static struct device_attribute atk_name_attr =
+ __ATTR(name, 0444, atk_name_show, NULL);
+
+static void atk_init_attribute(struct device_attribute *attr, char *name,
+ sysfs_show_func show)
+{
+ attr->attr.name = name;
+ attr->attr.mode = 0444;
+ attr->show = show;
+ attr->store = NULL;
+}
+
+
+static union acpi_object *atk_get_pack_member(struct atk_data *data,
+ union acpi_object *pack,
+ enum atk_pack_member m)
+{
+ bool old_if = data->old_interface;
+ int offset;
+
+ switch (m) {
+ case HWMON_PACK_FLAGS:
+ offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS;
+ break;
+ case HWMON_PACK_NAME:
+ offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME;
+ break;
+ case HWMON_PACK_LIMIT1:
+ offset = old_if ? _HWMON_OLD_PACK_LIMIT1 :
+ _HWMON_NEW_PACK_LIMIT1;
+ break;
+ case HWMON_PACK_LIMIT2:
+ offset = old_if ? _HWMON_OLD_PACK_LIMIT2 :
+ _HWMON_NEW_PACK_LIMIT2;
+ break;
+ case HWMON_PACK_ENABLE:
+ offset = old_if ? _HWMON_OLD_PACK_ENABLE :
+ _HWMON_NEW_PACK_ENABLE;
+ break;
+ default:
+ return NULL;
+ }
+
+ return &pack->package.elements[offset];
+}
+
+
+/* New package format is:
+ * - flag (int)
+ * class - used for de-muxing the request to the correct GITn
+ * type (volt, temp, fan)
+ * sensor id |
+ * sensor id - used for de-muxing the request _inside_ the GITn
+ * - name (str)
+ * - unknown (int)
+ * - unknown (int)
+ * - limit1 (int)
+ * - limit2 (int)
+ * - enable (int)
+ *
+ * The old package has the same format but it's missing the two unknown fields.
+ */
+static int validate_hwmon_pack(struct atk_data *data, union acpi_object *obj)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ union acpi_object *tmp;
+ bool old_if = data->old_interface;
+ int const expected_size = old_if ? _HWMON_OLD_PACK_SIZE :
+ _HWMON_NEW_PACK_SIZE;
+
+ if (obj->type != ACPI_TYPE_PACKAGE) {
+ dev_warn(dev, "Invalid type: %d\n", obj->type);
+ return -EINVAL;
+ }
+
+ if (obj->package.count != expected_size) {
+ dev_warn(dev, "Invalid package size: %d, expected: %d\n",
+ obj->package.count, expected_size);
+ return -EINVAL;
+ }
+
+ tmp = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
+ if (tmp->type != ACPI_TYPE_INTEGER) {
+ dev_warn(dev, "Invalid type (flag): %d\n", tmp->type);
+ return -EINVAL;
+ }
+
+ tmp = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
+ if (tmp->type != ACPI_TYPE_STRING) {
+ dev_warn(dev, "Invalid type (name): %d\n", tmp->type);
+ return -EINVAL;
+ }
+
+ /* Don't check... we don't know what they're useful for anyway */
+#if 0
+ tmp = &obj->package.elements[HWMON_PACK_UNK1];
+ if (tmp->type != ACPI_TYPE_INTEGER) {
+ dev_warn(dev, "Invalid type (unk1): %d\n", tmp->type);
+ return -EINVAL;
+ }
+
+ tmp = &obj->package.elements[HWMON_PACK_UNK2];
+ if (tmp->type != ACPI_TYPE_INTEGER) {
+ dev_warn(dev, "Invalid type (unk2): %d\n", tmp->type);
+ return -EINVAL;
+ }
+#endif
+
+ tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
+ if (tmp->type != ACPI_TYPE_INTEGER) {
+ dev_warn(dev, "Invalid type (limit1): %d\n", tmp->type);
+ return -EINVAL;
+ }
+
+ tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
+ if (tmp->type != ACPI_TYPE_INTEGER) {
+ dev_warn(dev, "Invalid type (limit2): %d\n", tmp->type);
+ return -EINVAL;
+ }
+
+ tmp = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
+ if (tmp->type != ACPI_TYPE_INTEGER) {
+ dev_warn(dev, "Invalid type (enable): %d\n", tmp->type);
+ return -EINVAL;
+ }
+
+ atk_print_sensor(data, obj);
+
+ return 0;
+}
+
+static char const *atk_sensor_type(union acpi_object *flags)
+{
+ u64 type = flags->integer.value & ATK_TYPE_MASK;
+ char const *what;
+
+ switch (type) {
+ case HWMON_TYPE_VOLT:
+ what = "voltage";
+ break;
+ case HWMON_TYPE_TEMP:
+ what = "temperature";
+ break;
+ case HWMON_TYPE_FAN:
+ what = "fan";
+ break;
+ default:
+ what = "unknown";
+ break;
+ }
+
+ return what;
+}
+
+static void atk_print_sensor(struct atk_data *data, union acpi_object *obj)
+{
+#ifdef DEBUG
+ struct device *dev = &data->acpi_dev->dev;
+ union acpi_object *flags;
+ union acpi_object *name;
+ union acpi_object *limit1;
+ union acpi_object *limit2;
+ union acpi_object *enable;
+ char const *what;
+
+ flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
+ name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
+ limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
+ limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
+ enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
+
+ what = atk_sensor_type(flags);
+
+ dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n", what,
+ flags->integer.value,
+ name->string.pointer,
+ limit1->integer.value, limit2->integer.value,
+ enable->integer.value ? "enabled" : "disabled");
+#endif
+}
+
+static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value)
+{
+ struct atk_data *data = sensor->data;
+ struct device *dev = &data->acpi_dev->dev;
+ struct acpi_object_list params;
+ union acpi_object id;
+ acpi_status status;
+ acpi_handle method;
+
+ switch (sensor->type) {
+ case HWMON_TYPE_VOLT:
+ method = data->rvlt_handle;
+ break;
+ case HWMON_TYPE_TEMP:
+ method = data->rtmp_handle;
+ break;
+ case HWMON_TYPE_FAN:
+ method = data->rfan_handle;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ id.type = ACPI_TYPE_INTEGER;
+ id.integer.value = sensor->id;
+
+ params.count = 1;
+ params.pointer = &id;
+
+ status = acpi_evaluate_integer(method, NULL, &params, value);
+ if (status != AE_OK) {
+ dev_warn(dev, "%s: ACPI exception: %s\n", __func__,
+ acpi_format_exception(status));
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value)
+{
+ struct atk_data *data = sensor->data;
+ struct device *dev = &data->acpi_dev->dev;
+ struct acpi_object_list params;
+ struct acpi_buffer ret;
+ union acpi_object id;
+ struct atk_acpi_buffer_u64 tmp;
+ acpi_status status;
+
+ id.type = ACPI_TYPE_INTEGER;
+ id.integer.value = sensor->id;
+
+ params.count = 1;
+ params.pointer = &id;
+
+ tmp.buf.type = ACPI_TYPE_BUFFER;
+ tmp.buf.buffer.pointer = (u8 *)&tmp.value;
+ tmp.buf.buffer.length = sizeof(u64);
+ ret.length = sizeof(tmp);
+ ret.pointer = &tmp;
+
+ status = acpi_evaluate_object_typed(data->read_handle, NULL, &params,
+ &ret, ACPI_TYPE_BUFFER);
+ if (status != AE_OK) {
+ dev_warn(dev, "%s: ACPI exception: %s\n", __func__,
+ acpi_format_exception(status));
+ return -EIO;
+ }
+
+ /* Return buffer format:
+ * [0-3] "value" is valid flag
+ * [4-7] value
+ */
+ if (!(tmp.value & 0xffffffff)) {
+ /* The reading is not valid, possible causes:
+ * - sensor failure
+ * - enumeration was FUBAR (and we didn't notice)
+ */
+ dev_info(dev, "Failure: %#llx\n", tmp.value);
+ return -EIO;
+ }
+
+ *value = (tmp.value & 0xffffffff00000000ULL) >> 32;
+
+ return 0;
+}
+
+static int atk_read_value(struct atk_sensor_data *sensor, u64 *value)
+{
+ int err;
+
+ if (!sensor->is_valid ||
+ time_after(jiffies, sensor->last_updated + CACHE_TIME)) {
+ if (sensor->data->old_interface)
+ err = atk_read_value_old(sensor, value);
+ else
+ err = atk_read_value_new(sensor, value);
+
+ sensor->is_valid = true;
+ sensor->last_updated = jiffies;
+ sensor->cached_value = *value;
+ } else {
+ *value = sensor->cached_value;
+ err = 0;
+ }
+
+ return err;
+}
+
+static int atk_add_sensor(struct atk_data *data, union acpi_object *obj)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ union acpi_object *flags;
+ union acpi_object *name;
+ union acpi_object *limit1;
+ union acpi_object *limit2;
+ union acpi_object *enable;
+ struct atk_sensor_data *sensor;
+ char const *base_name;
+ char const *limit1_name;
+ char const *limit2_name;
+ u64 type;
+ int err;
+ int *num;
+ int start;
+
+ if (obj->type != ACPI_TYPE_PACKAGE) {
+ /* wft is this? */
+ dev_warn(dev, "Unknown type for ACPI object: (%d)\n",
+ obj->type);
+ return -EINVAL;
+ }
+
+ err = validate_hwmon_pack(data, obj);
+ if (err)
+ return err;
+
+ /* Ok, we have a valid hwmon package */
+ type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value
+ & ATK_TYPE_MASK;
+
+ switch (type) {
+ case HWMON_TYPE_VOLT:
+ base_name = "in";
+ limit1_name = "min";
+ limit2_name = "max";
+ num = &data->voltage_count;
+ start = 0;
+ break;
+ case HWMON_TYPE_TEMP:
+ base_name = "temp";
+ limit1_name = "max";
+ limit2_name = "crit";
+ num = &data->temperature_count;
+ start = 1;
+ break;
+ case HWMON_TYPE_FAN:
+ base_name = "fan";
+ limit1_name = "min";
+ limit2_name = "max";
+ num = &data->fan_count;
+ start = 1;
+ break;
+ default:
+ dev_warn(dev, "Unknown sensor type: %#llx\n", type);
+ return -EINVAL;
+ }
+
+ enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
+ if (!enable->integer.value)
+ /* sensor is disabled */
+ return 0;
+
+ flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
+ name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
+ limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
+ limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
+
+ sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
+
+ sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL);
+ if (!sensor->acpi_name) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ INIT_LIST_HEAD(&sensor->list);
+ sensor->type = type;
+ sensor->data = data;
+ sensor->id = flags->integer.value;
+ sensor->limit1 = limit1->integer.value;
+ sensor->limit2 = limit2->integer.value;
+
+ snprintf(sensor->input_attr_name, ATTR_NAME_SIZE,
+ "%s%d_input", base_name, start + *num);
+ atk_init_attribute(&sensor->input_attr,
+ sensor->input_attr_name,
+ atk_input_show);
+
+ snprintf(sensor->label_attr_name, ATTR_NAME_SIZE,
+ "%s%d_label", base_name, start + *num);
+ atk_init_attribute(&sensor->label_attr,
+ sensor->label_attr_name,
+ atk_label_show);
+
+ snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE,
+ "%s%d_%s", base_name, start + *num, limit1_name);
+ atk_init_attribute(&sensor->limit1_attr,
+ sensor->limit1_attr_name,
+ atk_limit1_show);
+
+ snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE,
+ "%s%d_%s", base_name, start + *num, limit2_name);
+ atk_init_attribute(&sensor->limit2_attr,
+ sensor->limit2_attr_name,
+ atk_limit2_show);
+
+ list_add(&sensor->list, &data->sensor_list);
+ (*num)++;
+
+ return 1;
+out:
+ kfree(sensor->acpi_name);
+ kfree(sensor);
+ return err;
+}
+
+static int atk_enumerate_old_hwmon(struct atk_data *data)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ struct acpi_buffer buf;
+ union acpi_object *pack;
+ acpi_status status;
+ int i, ret;
+ int count = 0;
+
+ /* Voltages */
+ buf.length = ACPI_ALLOCATE_BUFFER;
+ status = acpi_evaluate_object_typed(data->atk_handle,
+ METHOD_OLD_ENUM_VLT, NULL, &buf, ACPI_TYPE_PACKAGE);
+ if (status != AE_OK) {
+ dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n",
+ acpi_format_exception(status));
+
+ return -ENODEV;
+ }
+
+ pack = buf.pointer;
+ for (i = 1; i < pack->package.count; i++) {
+ union acpi_object *obj = &pack->package.elements[i];
+
+ ret = atk_add_sensor(data, obj);
+ if (ret > 0)
+ count++;
+ }
+ ACPI_FREE(buf.pointer);
+
+ /* Temperatures */
+ buf.length = ACPI_ALLOCATE_BUFFER;
+ status = acpi_evaluate_object_typed(data->atk_handle,
+ METHOD_OLD_ENUM_TMP, NULL, &buf, ACPI_TYPE_PACKAGE);
+ if (status != AE_OK) {
+ dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n",
+ acpi_format_exception(status));
+
+ ret = -ENODEV;
+ goto cleanup;
+ }
+
+ pack = buf.pointer;
+ for (i = 1; i < pack->package.count; i++) {
+ union acpi_object *obj = &pack->package.elements[i];
+
+ ret = atk_add_sensor(data, obj);
+ if (ret > 0)
+ count++;
+ }
+ ACPI_FREE(buf.pointer);
+
+ /* Fans */
+ buf.length = ACPI_ALLOCATE_BUFFER;
+ status = acpi_evaluate_object_typed(data->atk_handle,
+ METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE);
+ if (status != AE_OK) {
+ dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n",
+ acpi_format_exception(status));
+
+ ret = -ENODEV;
+ goto cleanup;
+ }
+
+ pack = buf.pointer;
+ for (i = 1; i < pack->package.count; i++) {
+ union acpi_object *obj = &pack->package.elements[i];
+
+ ret = atk_add_sensor(data, obj);
+ if (ret > 0)
+ count++;
+ }
+ ACPI_FREE(buf.pointer);
+
+ return count;
+cleanup:
+ atk_free_sensors(data);
+ return ret;
+}
+
+static int atk_enumerate_new_hwmon(struct atk_data *data)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ struct acpi_buffer buf;
+ acpi_status ret;
+ struct acpi_object_list params;
+ union acpi_object id;
+ union acpi_object *pack;
+ int err;
+ int i;
+
+ dev_dbg(dev, "Enumerating hwmon sensors\n");
+
+ id.type = ACPI_TYPE_INTEGER;
+ id.integer.value = ATK_MUX_HWMON;
+ params.count = 1;
+ params.pointer = &id;
+
+ buf.length = ACPI_ALLOCATE_BUFFER;
+ ret = acpi_evaluate_object_typed(data->enumerate_handle, NULL, &params,
+ &buf, ACPI_TYPE_PACKAGE);
+ if (ret != AE_OK) {
+ dev_warn(dev, METHOD_ENUMERATE ": ACPI exception: %s\n",
+ acpi_format_exception(ret));
+ return -ENODEV;
+ }
+
+ /* Result must be a package */
+ pack = buf.pointer;
+
+ if (pack->package.count < 1) {
+ dev_dbg(dev, "%s: hwmon package is too small: %d\n", __func__,
+ pack->package.count);
+ err = -EINVAL;
+ goto out;
+ }
+
+ for (i = 0; i < pack->package.count; i++) {
+ union acpi_object *obj = &pack->package.elements[i];
+
+ atk_add_sensor(data, obj);
+ }
+
+ err = data->voltage_count + data->temperature_count + data->fan_count;
+
+out:
+ ACPI_FREE(buf.pointer);
+ return err;
+}
+
+static int atk_create_files(struct atk_data *data)
+{
+ struct atk_sensor_data *s;
+ int err;
+
+ list_for_each_entry(s, &data->sensor_list, list) {
+ err = device_create_file(data->hwmon_dev, &s->input_attr);
+ if (err)
+ return err;
+ err = device_create_file(data->hwmon_dev, &s->label_attr);
+ if (err)
+ return err;
+ err = device_create_file(data->hwmon_dev, &s->limit1_attr);
+ if (err)
+ return err;
+ err = device_create_file(data->hwmon_dev, &s->limit2_attr);
+ if (err)
+ return err;
+ }
+
+ err = device_create_file(data->hwmon_dev, &atk_name_attr);
+
+ return err;
+}
+
+static void atk_remove_files(struct atk_data *data)
+{
+ struct atk_sensor_data *s;
+
+ list_for_each_entry(s, &data->sensor_list, list) {
+ device_remove_file(data->hwmon_dev, &s->input_attr);
+ device_remove_file(data->hwmon_dev, &s->label_attr);
+ device_remove_file(data->hwmon_dev, &s->limit1_attr);
+ device_remove_file(data->hwmon_dev, &s->limit2_attr);
+ }
+ device_remove_file(data->hwmon_dev, &atk_name_attr);
+}
+
+static void atk_free_sensors(struct atk_data *data)
+{
+ struct list_head *head = &data->sensor_list;
+ struct atk_sensor_data *s, *tmp;
+
+ list_for_each_entry_safe(s, tmp, head, list) {
+ kfree(s->acpi_name);
+ kfree(s);
+ }
+}
+
+static int atk_register_hwmon(struct atk_data *data)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ int err;
+
+ dev_dbg(dev, "registering hwmon device\n");
+ data->hwmon_dev = hwmon_device_register(dev);
+ if (IS_ERR(data->hwmon_dev))
+ return PTR_ERR(data->hwmon_dev);
+
+ dev_dbg(dev, "populating sysfs directory\n");
+ err = atk_create_files(data);
+ if (err)
+ goto remove;
+
+ return 0;
+remove:
+ /* Cleanup the registered files */
+ atk_remove_files(data);
+ hwmon_device_unregister(data->hwmon_dev);
+ return err;
+}
+
+static int atk_check_old_if(struct atk_data *data)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ acpi_handle ret;
+ acpi_status status;
+
+ /* RTMP: read temperature */
+ status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_TMP, &ret);
+ if (status != AE_OK) {
+ dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n",
+ acpi_format_exception(status));
+ return -ENODEV;
+ }
+ data->rtmp_handle = ret;
+
+ /* RVLT: read voltage */
+ status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_VLT, &ret);
+ if (status != AE_OK) {
+ dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n",
+ acpi_format_exception(status));
+ return -ENODEV;
+ }
+ data->rvlt_handle = ret;
+
+ /* RFAN: read fan status */
+ status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_FAN, &ret);
+ if (status != AE_OK) {
+ dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n",
+ acpi_format_exception(status));
+ return -ENODEV;
+ }
+ data->rfan_handle = ret;
+
+ return 0;
+}
+
+static int atk_check_new_if(struct atk_data *data)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ acpi_handle ret;
+ acpi_status status;
+
+ /* Enumeration */
+ status = acpi_get_handle(data->atk_handle, METHOD_ENUMERATE, &ret);
+ if (status != AE_OK) {
+ dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n",
+ acpi_format_exception(status));
+ return -ENODEV;
+ }
+ data->enumerate_handle = ret;
+
+ /* De-multiplexer (read) */
+ status = acpi_get_handle(data->atk_handle, METHOD_READ, &ret);
+ if (status != AE_OK) {
+ dev_dbg(dev, "method " METHOD_READ " not found: %s\n",
+ acpi_format_exception(status));
+ return -ENODEV;
+ }
+ data->read_handle = ret;
+
+ return 0;
+}
+
+static int atk_add(struct acpi_device *device)
+{
+ acpi_status ret;
+ int err;
+ struct acpi_buffer buf;
+ union acpi_object *obj;
+ struct atk_data *data;
+
+ dev_dbg(&device->dev, "adding...\n");
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->acpi_dev = device;
+ data->atk_handle = device->handle;
+ INIT_LIST_HEAD(&data->sensor_list);
+
+ buf.length = ACPI_ALLOCATE_BUFFER;
+ ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL,
+ &buf, ACPI_TYPE_PACKAGE);
+ if (ret != AE_OK) {
+ dev_dbg(&device->dev, "atk: method MBIF not found\n");
+ err = -ENODEV;
+ goto out;
+ }
+
+ obj = buf.pointer;
+ if (obj->package.count >= 2 &&
+ obj->package.elements[1].type == ACPI_TYPE_STRING) {
+ dev_dbg(&device->dev, "board ID = %s\n",
+ obj->package.elements[1].string.pointer);
+ }
+ ACPI_FREE(buf.pointer);
+
+ /* Check for hwmon methods: first check "old" style methods; note that
+ * both may be present: in this case we stick to the old interface;
+ * analysis of multiple DSDTs indicates that when both interfaces
+ * are present the new one (GGRP/GITM) is not functional.
+ */
+ err = atk_check_old_if(data);
+ if (!err) {
+ dev_dbg(&device->dev, "Using old hwmon interface\n");
+ data->old_interface = true;
+ } else {
+ err = atk_check_new_if(data);
+ if (err)
+ goto out;
+
+ dev_dbg(&device->dev, "Using new hwmon interface\n");
+ data->old_interface = false;
+ }
+
+ if (data->old_interface)
+ err = atk_enumerate_old_hwmon(data);
+ else
+ err = atk_enumerate_new_hwmon(data);
+ if (err < 0)
+ goto out;
+ if (err == 0) {
+ dev_info(&device->dev,
+ "No usable sensor detected, bailing out\n");
+ err = -ENODEV;
+ goto out;
+ }
+
+ err = atk_register_hwmon(data);
+ if (err)
+ goto cleanup;
+
+ device->driver_data = data;
+ return 0;
+cleanup:
+ atk_free_sensors(data);
+out:
+ kfree(data);
+ return err;
+}
+
+static int atk_remove(struct acpi_device *device, int type)
+{
+ struct atk_data *data = device->driver_data;
+ dev_dbg(&device->dev, "removing...\n");
+
+ device->driver_data = NULL;
+
+ atk_remove_files(data);
+ atk_free_sensors(data);
+ hwmon_device_unregister(data->hwmon_dev);
+
+ kfree(data);
+
+ return 0;
+}
+
+static int __init atk0110_init(void)
+{
+ int ret;
+
+ ret = acpi_bus_register_driver(&atk_driver);
+ if (ret)
+ pr_info("atk: acpi_bus_register_driver failed: %d\n", ret);
+
+ return ret;
+}
+
+static void __exit atk0110_exit(void)
+{
+ acpi_bus_unregister_driver(&atk_driver);
+}
+
+module_init(atk0110_init);
+module_exit(atk0110_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/hwmon/g760a.c b/drivers/hwmon/g760a.c
new file mode 100644
index 00000000000..19c01a49f6b
--- /dev/null
+++ b/drivers/hwmon/g760a.c
@@ -0,0 +1,272 @@
+/*
+ g760a - Driver for the Global Mixed-mode Technology Inc. G760A
+ fan speed PWM controller chip
+
+ Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
+
+ Complete datasheet is available at GMT's website:
+ http://www.gmt.com.tw/datasheet/g760a.pdf
+
+ 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.
+*/
+
+#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/sysfs.h>
+
+static const struct i2c_device_id g760a_id[] = {
+ { "g760a", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, g760a_id);
+
+enum g760a_regs {
+ G760A_REG_SET_CNT = 0x00,
+ G760A_REG_ACT_CNT = 0x01,
+ G760A_REG_FAN_STA = 0x02
+};
+
+#define G760A_REG_FAN_STA_RPM_OFF 0x1 /* +/-20% off */
+#define G760A_REG_FAN_STA_RPM_LOW 0x2 /* below 1920rpm */
+
+/* register data is read (and cached) at most once per second */
+#define G760A_UPDATE_INTERVAL (HZ)
+
+struct g760a_data {
+ struct i2c_client *client;
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+
+ /* board specific parameters */
+ u32 clk; /* default 32kHz */
+ u16 fan_div; /* default P=2 */
+
+ /* g760a register cache */
+ unsigned int valid:1;
+ unsigned long last_updated; /* In jiffies */
+
+ u8 set_cnt; /* PWM (period) count number; 0xff stops fan */
+ u8 act_cnt; /* formula: cnt = (CLK * 30)/(rpm * P) */
+ u8 fan_sta; /* bit 0: set when actual fan speed more than 20%
+ * outside requested fan speed
+ * bit 1: set when fan speed below 1920 rpm */
+};
+
+#define G760A_DEFAULT_CLK 32768
+#define G760A_DEFAULT_FAN_DIV 2
+
+#define PWM_FROM_CNT(cnt) (0xff-(cnt))
+#define PWM_TO_CNT(pwm) (0xff-(pwm))
+
+unsigned int rpm_from_cnt(u8 val, u32 clk, u16 div)
+{
+ return ((val == 0x00) ? 0 : ((clk*30)/(val*div)));
+}
+
+/* new-style driver model */
+static int g760a_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int g760a_remove(struct i2c_client *client);
+
+static struct i2c_driver g760a_driver = {
+ .driver = {
+ .name = "g760a",
+ },
+ .probe = g760a_probe,
+ .remove = g760a_remove,
+ .id_table = g760a_id,
+};
+
+/* read/write wrappers */
+static int g760a_read_value(struct i2c_client *client, enum g760a_regs reg)
+{
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int g760a_write_value(struct i2c_client *client, enum g760a_regs reg,
+ u16 value)
+{
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+/****************************************************************************
+ * sysfs attributes
+ */
+
+static struct g760a_data *g760a_update_client(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct g760a_data *data = i2c_get_clientdata(client);
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + G760A_UPDATE_INTERVAL)
+ || !data->valid) {
+ dev_dbg(&client->dev, "Starting g760a update\n");
+
+ data->set_cnt = g760a_read_value(client, G760A_REG_SET_CNT);
+ data->act_cnt = g760a_read_value(client, G760A_REG_ACT_CNT);
+ data->fan_sta = g760a_read_value(client, G760A_REG_FAN_STA);
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+static ssize_t show_fan(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct g760a_data *data = g760a_update_client(dev);
+ unsigned int rpm = 0;
+
+ mutex_lock(&data->update_lock);
+ if (!(data->fan_sta & G760A_REG_FAN_STA_RPM_LOW))
+ rpm = rpm_from_cnt(data->act_cnt, data->clk, data->fan_div);
+ mutex_unlock(&data->update_lock);
+
+ return sprintf(buf, "%d\n", rpm);
+}
+
+static ssize_t show_fan_alarm(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct g760a_data *data = g760a_update_client(dev);
+
+ int fan_alarm = (data->fan_sta & G760A_REG_FAN_STA_RPM_OFF) ? 1 : 0;
+
+ return sprintf(buf, "%d\n", fan_alarm);
+}
+
+static ssize_t get_pwm(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct g760a_data *data = g760a_update_client(dev);
+
+ return sprintf(buf, "%d\n", PWM_FROM_CNT(data->set_cnt));
+}
+
+static ssize_t set_pwm(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct g760a_data *data = g760a_update_client(dev);
+ unsigned long val;
+
+ if (strict_strtoul(buf, 10, &val))
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ data->set_cnt = PWM_TO_CNT(SENSORS_LIMIT(val, 0, 255));
+ g760a_write_value(client, G760A_REG_SET_CNT, data->set_cnt);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, get_pwm, set_pwm);
+static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL);
+static DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL);
+
+static struct attribute *g760a_attributes[] = {
+ &dev_attr_pwm1.attr,
+ &dev_attr_fan1_input.attr,
+ &dev_attr_fan1_alarm.attr,
+ NULL
+};
+
+static const struct attribute_group g760a_group = {
+ .attrs = g760a_attributes,
+};
+
+/****************************************************************************
+ * new-style driver model code
+ */
+
+static int g760a_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct g760a_data *data;
+ int err;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ data = kzalloc(sizeof(struct g760a_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, data);
+
+ data->client = client;
+ mutex_init(&data->update_lock);
+
+ /* setup default configuration for now */
+ data->fan_div = G760A_DEFAULT_FAN_DIV;
+ data->clk = G760A_DEFAULT_CLK;
+
+ /* Register sysfs hooks */
+ err = sysfs_create_group(&client->dev.kobj, &g760a_group);
+ if (err)
+ goto error_sysfs_create_group;
+
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto error_hwmon_device_register;
+ }
+
+ return 0;
+
+error_hwmon_device_register:
+ sysfs_remove_group(&client->dev.kobj, &g760a_group);
+error_sysfs_create_group:
+ kfree(data);
+ i2c_set_clientdata(client, NULL);
+
+ return err;
+}
+
+static int g760a_remove(struct i2c_client *client)
+{
+ struct g760a_data *data = i2c_get_clientdata(client);
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &g760a_group);
+ kfree(data);
+ i2c_set_clientdata(client, NULL);
+
+ return 0;
+}
+
+/* module management */
+
+static int __init g760a_init(void)
+{
+ return i2c_add_driver(&g760a_driver);
+}
+
+static void __exit g760a_exit(void)
+{
+ i2c_del_driver(&g760a_driver);
+}
+
+MODULE_AUTHOR("Herbert Valerio Riedel <hvr@gnu.org>");
+MODULE_DESCRIPTION("GMT G760A driver");
+MODULE_LICENSE("GPL");
+
+module_init(g760a_init);
+module_exit(g760a_exit);
diff --git a/drivers/hwmon/hp_accel.c b/drivers/hwmon/hp_accel.c
index 55d3dc565be..abca7e9f953 100644
--- a/drivers/hwmon/hp_accel.c
+++ b/drivers/hwmon/hp_accel.c
@@ -34,7 +34,6 @@
#include <linux/wait.h>
#include <linux/poll.h>
#include <linux/freezer.h>
-#include <linux/version.h>
#include <linux/uaccess.h>
#include <linux/leds.h>
#include <acpi/acpi_drivers.h>
diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c
index 091d95f38aa..e34f9e402a2 100644
--- a/drivers/hwmon/lm95241.c
+++ b/drivers/hwmon/lm95241.c
@@ -87,25 +87,11 @@ I2C_CLIENT_INSMOD_1(lm95241);
(val_h)) * 1000 + (val_l) * 1000 / 256)
/* Functions declaration */
-static int lm95241_attach_adapter(struct i2c_adapter *adapter);
-static int lm95241_detect(struct i2c_adapter *adapter, int address,
- int kind);
static void lm95241_init_client(struct i2c_client *client);
-static int lm95241_detach_client(struct i2c_client *client);
static struct lm95241_data *lm95241_update_device(struct device *dev);
-/* Driver data (common to all clients) */
-static struct i2c_driver lm95241_driver = {
- .driver = {
- .name = "lm95241",
- },
- .attach_adapter = lm95241_attach_adapter,
- .detach_client = lm95241_detach_client,
-};
-
/* Client data (each client gets its own) */
struct lm95241_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
unsigned long last_updated, rate; /* in jiffies */
@@ -323,42 +309,16 @@ static const struct attribute_group lm95241_group = {
.attrs = lm95241_attributes,
};
-/* Init/exit code */
-static int lm95241_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm95241_detect(struct i2c_client *new_client, int kind,
+ struct i2c_board_info *info)
{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, lm95241_detect);
-}
-
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *new_client;
- struct lm95241_data *data;
- int err = 0;
+ struct i2c_adapter *adapter = new_client->adapter;
+ int address = new_client->addr;
const char *name = "";
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- data = kzalloc(sizeof(struct lm95241_data), GFP_KERNEL);
- if (!data) {
- err = -ENOMEM;
- goto exit;
- }
-
- /* The common I2C client data is placed right before the
- LM95241-specific data. */
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &lm95241_driver;
- new_client->flags = 0;
+ return -ENODEV;
/*
* Now we do the remaining detection. A negative kind means that
@@ -378,7 +338,7 @@ static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
dev_dbg(&adapter->dev,
"LM95241 detection failed at 0x%02x.\n",
address);
- goto exit_free;
+ return -ENODEV;
}
}
@@ -392,23 +352,32 @@ static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
if (kind <= 0) { /* identification failed */
dev_info(&adapter->dev, "Unsupported chip\n");
- goto exit_free;
+ return -ENODEV;
}
}
}
+ /* Fill the i2c board info */
if (kind == lm95241)
name = "lm95241";
+ strlcpy(info->type, name, I2C_NAME_SIZE);
+ return 0;
+}
- /* We can fill in the remaining client fields */
- strlcpy(new_client->name, name, I2C_NAME_SIZE);
- data->valid = 0;
- mutex_init(&data->update_lock);
+static int lm95241_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct lm95241_data *data;
+ int err;
- /* Tell the I2C layer a new client has arrived */
- err = i2c_attach_client(new_client);
- if (err)
- goto exit_free;
+ data = kzalloc(sizeof(struct lm95241_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(new_client, data);
+ mutex_init(&data->update_lock);
/* Initialize the LM95241 chip */
lm95241_init_client(new_client);
@@ -416,7 +385,7 @@ static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
/* Register sysfs hooks */
err = sysfs_create_group(&new_client->dev.kobj, &lm95241_group);
if (err)
- goto exit_detach;
+ goto exit_free;
data->hwmon_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->hwmon_dev)) {
@@ -428,8 +397,6 @@ static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &lm95241_group);
-exit_detach:
- i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
@@ -456,18 +423,14 @@ static void lm95241_init_client(struct i2c_client *client)
data->model);
}
-static int lm95241_detach_client(struct i2c_client *client)
+static int lm95241_remove(struct i2c_client *client)
{
struct lm95241_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm95241_group);
- err = i2c_detach_client(client);
- if (err)
- return err;
-
+ i2c_set_clientdata(client, NULL);
kfree(data);
return 0;
}
@@ -509,6 +472,25 @@ static struct lm95241_data *lm95241_update_device(struct device *dev)
return data;
}
+/* Driver data (common to all clients) */
+static const struct i2c_device_id lm95241_id[] = {
+ { "lm95241", lm95241 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm95241_id);
+
+static struct i2c_driver lm95241_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "lm95241",
+ },
+ .probe = lm95241_probe,
+ .remove = lm95241_remove,
+ .id_table = lm95241_id,
+ .detect = lm95241_detect,
+ .address_data = &addr_data,
+};
+
static int __init sensors_lm95241_init(void)
{
return i2c_add_driver(&lm95241_driver);
diff --git a/drivers/hwmon/sht15.c b/drivers/hwmon/sht15.c
new file mode 100644
index 00000000000..6cbdc2fea73
--- /dev/null
+++ b/drivers/hwmon/sht15.c
@@ -0,0 +1,692 @@
+/*
+ * sht15.c - support for the SHT15 Temperature and Humidity Sensor
+ *
+ * Copyright (c) 2009 Jonathan Cameron
+ *
+ * Copyright (c) 2007 Wouter Horre
+ *
+ * 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.
+ *
+ * Currently ignoring checksum on readings.
+ * Default resolution only (14bit temp, 12bit humidity)
+ * Ignoring battery status.
+ * Heater not enabled.
+ * Timings are all conservative.
+ *
+ * Data sheet available (1/2009) at
+ * http://www.sensirion.ch/en/pdf/product_information/Datasheet-humidity-sensor-SHT1x.pdf
+ *
+ * Regulator supply name = vcc
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/jiffies.h>
+#include <linux/err.h>
+#include <linux/sht15.h>
+#include <linux/regulator/consumer.h>
+#include <asm/atomic.h>
+
+#define SHT15_MEASURE_TEMP 3
+#define SHT15_MEASURE_RH 5
+
+#define SHT15_READING_NOTHING 0
+#define SHT15_READING_TEMP 1
+#define SHT15_READING_HUMID 2
+
+/* Min timings in nsecs */
+#define SHT15_TSCKL 100 /* clock low */
+#define SHT15_TSCKH 100 /* clock high */
+#define SHT15_TSU 150 /* data setup time */
+
+/**
+ * struct sht15_temppair - elements of voltage dependant temp calc
+ * @vdd: supply voltage in microvolts
+ * @d1: see data sheet
+ */
+struct sht15_temppair {
+ int vdd; /* microvolts */
+ int d1;
+};
+
+/* Table 9 from data sheet - relates temperature calculation
+ * to supply voltage.
+ */
+static const struct sht15_temppair temppoints[] = {
+ { 2500000, -39400 },
+ { 3000000, -39600 },
+ { 3500000, -39700 },
+ { 4000000, -39800 },
+ { 5000000, -40100 },
+};
+
+/**
+ * struct sht15_data - device instance specific data
+ * @pdata: platform data (gpio's etc)
+ * @read_work: bh of interrupt handler
+ * @wait_queue: wait queue for getting values from device
+ * @val_temp: last temperature value read from device
+ * @val_humid: last humidity value read from device
+ * @flag: status flag used to identify what the last request was
+ * @valid: are the current stored values valid (start condition)
+ * @last_updat: time of last update
+ * @read_lock: mutex to ensure only one read in progress
+ * at a time.
+ * @dev: associate device structure
+ * @hwmon_dev: device associated with hwmon subsystem
+ * @reg: associated regulator (if specified)
+ * @nb: notifier block to handle notifications of voltage changes
+ * @supply_uV: local copy of supply voltage used to allow
+ * use of regulator consumer if available
+ * @supply_uV_valid: indicates that an updated value has not yet
+ * been obtained from the regulator and so any calculations
+ * based upon it will be invalid.
+ * @update_supply_work: work struct that is used to update the supply_uV
+ * @interrupt_handled: flag used to indicate a hander has been scheduled
+ */
+struct sht15_data {
+ struct sht15_platform_data *pdata;
+ struct work_struct read_work;
+ wait_queue_head_t wait_queue;
+ uint16_t val_temp;
+ uint16_t val_humid;
+ u8 flag;
+ u8 valid;
+ unsigned long last_updat;
+ struct mutex read_lock;
+ struct device *dev;
+ struct device *hwmon_dev;
+ struct regulator *reg;
+ struct notifier_block nb;
+ int supply_uV;
+ int supply_uV_valid;
+ struct work_struct update_supply_work;
+ atomic_t interrupt_handled;
+};
+
+/**
+ * sht15_connection_reset() - reset the comms interface
+ * @data: sht15 specific data
+ *
+ * This implements section 3.4 of the data sheet
+ */
+static void sht15_connection_reset(struct sht15_data *data)
+{
+ int i;
+ gpio_direction_output(data->pdata->gpio_data, 1);
+ ndelay(SHT15_TSCKL);
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSCKL);
+ for (i = 0; i < 9; ++i) {
+ gpio_set_value(data->pdata->gpio_sck, 1);
+ ndelay(SHT15_TSCKH);
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSCKL);
+ }
+}
+/**
+ * sht15_send_bit() - send an individual bit to the device
+ * @data: device state data
+ * @val: value of bit to be sent
+ **/
+static inline void sht15_send_bit(struct sht15_data *data, int val)
+{
+
+ gpio_set_value(data->pdata->gpio_data, val);
+ ndelay(SHT15_TSU);
+ gpio_set_value(data->pdata->gpio_sck, 1);
+ ndelay(SHT15_TSCKH);
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSCKL); /* clock low time */
+}
+
+/**
+ * sht15_transmission_start() - specific sequence for new transmission
+ *
+ * @data: device state data
+ * Timings for this are not documented on the data sheet, so very
+ * conservative ones used in implementation. This implements
+ * figure 12 on the data sheet.
+ **/
+static void sht15_transmission_start(struct sht15_data *data)
+{
+ /* ensure data is high and output */
+ gpio_direction_output(data->pdata->gpio_data, 1);
+ ndelay(SHT15_TSU);
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSCKL);
+ gpio_set_value(data->pdata->gpio_sck, 1);
+ ndelay(SHT15_TSCKH);
+ gpio_set_value(data->pdata->gpio_data, 0);
+ ndelay(SHT15_TSU);
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSCKL);
+ gpio_set_value(data->pdata->gpio_sck, 1);
+ ndelay(SHT15_TSCKH);
+ gpio_set_value(data->pdata->gpio_data, 1);
+ ndelay(SHT15_TSU);
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSCKL);
+}
+/**
+ * sht15_send_byte() - send a single byte to the device
+ * @data: device state
+ * @byte: value to be sent
+ **/
+static void sht15_send_byte(struct sht15_data *data, u8 byte)
+{
+ int i;
+ for (i = 0; i < 8; i++) {
+ sht15_send_bit(data, !!(byte & 0x80));
+ byte <<= 1;
+ }
+}
+/**
+ * sht15_wait_for_response() - checks for ack from device
+ * @data: device state
+ **/
+static int sht15_wait_for_response(struct sht15_data *data)
+{
+ gpio_direction_input(data->pdata->gpio_data);
+ gpio_set_value(data->pdata->gpio_sck, 1);
+ ndelay(SHT15_TSCKH);
+ if (gpio_get_value(data->pdata->gpio_data)) {
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ dev_err(data->dev, "Command not acknowledged\n");
+ sht15_connection_reset(data);
+ return -EIO;
+ }
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSCKL);
+ return 0;
+}
+
+/**
+ * sht15_send_cmd() - Sends a command to the device.
+ * @data: device state
+ * @cmd: command byte to be sent
+ *
+ * On entry, sck is output low, data is output pull high
+ * and the interrupt disabled.
+ **/
+static int sht15_send_cmd(struct sht15_data *data, u8 cmd)
+{
+ int ret = 0;
+ sht15_transmission_start(data);
+ sht15_send_byte(data, cmd);
+ ret = sht15_wait_for_response(data);
+ return ret;
+}
+/**
+ * sht15_update_single_val() - get a new value from device
+ * @data: device instance specific data
+ * @command: command sent to request value
+ * @timeout_msecs: timeout after which comms are assumed
+ * to have failed are reset.
+ **/
+static inline int sht15_update_single_val(struct sht15_data *data,
+ int command,
+ int timeout_msecs)
+{
+ int ret;
+ ret = sht15_send_cmd(data, command);
+ if (ret)
+ return ret;
+
+ gpio_direction_input(data->pdata->gpio_data);
+ atomic_set(&data->interrupt_handled, 0);
+
+ enable_irq(gpio_to_irq(data->pdata->gpio_data));
+ if (gpio_get_value(data->pdata->gpio_data) == 0) {
+ disable_irq_nosync(gpio_to_irq(data->pdata->gpio_data));
+ /* Only relevant if the interrupt hasn't occured. */
+ if (!atomic_read(&data->interrupt_handled))
+ schedule_work(&data->read_work);
+ }
+ ret = wait_event_timeout(data->wait_queue,
+ (data->flag == SHT15_READING_NOTHING),
+ msecs_to_jiffies(timeout_msecs));
+ if (ret == 0) {/* timeout occurred */
+ disable_irq_nosync(gpio_to_irq(data->pdata->gpio_data));;
+ sht15_connection_reset(data);
+ return -ETIME;
+ }
+ return 0;
+}
+
+/**
+ * sht15_update_vals() - get updated readings from device if too old
+ * @data: device state
+ **/
+static int sht15_update_vals(struct sht15_data *data)
+{
+ int ret = 0;
+ int timeout = HZ;
+
+ mutex_lock(&data->read_lock);
+ if (time_after(jiffies, data->last_updat + timeout)
+ || !data->valid) {
+ data->flag = SHT15_READING_HUMID;
+ ret = sht15_update_single_val(data, SHT15_MEASURE_RH, 160);
+ if (ret)
+ goto error_ret;
+ data->flag = SHT15_READING_TEMP;
+ ret = sht15_update_single_val(data, SHT15_MEASURE_TEMP, 400);
+ if (ret)
+ goto error_ret;
+ data->valid = 1;
+ data->last_updat = jiffies;
+ }
+error_ret:
+ mutex_unlock(&data->read_lock);
+
+ return ret;
+}
+
+/**
+ * sht15_calc_temp() - convert the raw reading to a temperature
+ * @data: device state
+ *
+ * As per section 4.3 of the data sheet.
+ **/
+static inline int sht15_calc_temp(struct sht15_data *data)
+{
+ int d1 = 0;
+ int i;
+
+ for (i = 1; i < ARRAY_SIZE(temppoints) - 1; i++)
+ /* Find pointer to interpolate */
+ if (data->supply_uV > temppoints[i - 1].vdd) {
+ d1 = (data->supply_uV/1000 - temppoints[i - 1].vdd)
+ * (temppoints[i].d1 - temppoints[i - 1].d1)
+ / (temppoints[i].vdd - temppoints[i - 1].vdd)
+ + temppoints[i - 1].d1;
+ break;
+ }
+
+ return data->val_temp*10 + d1;
+}
+
+/**
+ * sht15_calc_humid() - using last temperature convert raw to humid
+ * @data: device state
+ *
+ * This is the temperature compensated version as per section 4.2 of
+ * the data sheet.
+ **/
+static inline int sht15_calc_humid(struct sht15_data *data)
+{
+ int RHlinear; /* milli percent */
+ int temp = sht15_calc_temp(data);
+
+ const int c1 = -4;
+ const int c2 = 40500; /* x 10 ^ -6 */
+ const int c3 = 2800; /* x10 ^ -9 */
+
+ RHlinear = c1*1000
+ + c2 * data->val_humid/1000
+ + (data->val_humid * data->val_humid * c3)/1000000;
+ return (temp - 25000) * (10000 + 800 * data->val_humid)
+ / 1000000 + RHlinear;
+}
+
+static ssize_t sht15_show_temp(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ struct sht15_data *data = dev_get_drvdata(dev);
+
+ /* Technically no need to read humidity as well */
+ ret = sht15_update_vals(data);
+
+ return ret ? ret : sprintf(buf, "%d\n",
+ sht15_calc_temp(data));
+}
+
+static ssize_t sht15_show_humidity(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ struct sht15_data *data = dev_get_drvdata(dev);
+
+ ret = sht15_update_vals(data);
+
+ return ret ? ret : sprintf(buf, "%d\n", sht15_calc_humid(data));
+
+};
+static ssize_t show_name(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ return sprintf(buf, "%s\n", pdev->name);
+}
+
+static SENSOR_DEVICE_ATTR(temp1_input,
+ S_IRUGO, sht15_show_temp,
+ NULL, 0);
+static SENSOR_DEVICE_ATTR(humidity1_input,
+ S_IRUGO, sht15_show_humidity,
+ NULL, 0);
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+static struct attribute *sht15_attrs[] = {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_humidity1_input.dev_attr.attr,
+ &dev_attr_name.attr,
+ NULL,
+};
+
+static const struct attribute_group sht15_attr_group = {
+ .attrs = sht15_attrs,
+};
+
+static irqreturn_t sht15_interrupt_fired(int irq, void *d)
+{
+ struct sht15_data *data = d;
+ /* First disable the interrupt */
+ disable_irq_nosync(irq);
+ atomic_inc(&data->interrupt_handled);
+ /* Then schedule a reading work struct */
+ if (data->flag != SHT15_READING_NOTHING)
+ schedule_work(&data->read_work);
+ return IRQ_HANDLED;
+}
+
+/* Each byte of data is acknowledged by pulling the data line
+ * low for one clock pulse.
+ */
+static void sht15_ack(struct sht15_data *data)
+{
+ gpio_direction_output(data->pdata->gpio_data, 0);
+ ndelay(SHT15_TSU);
+ gpio_set_value(data->pdata->gpio_sck, 1);
+ ndelay(SHT15_TSU);
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSU);
+ gpio_set_value(data->pdata->gpio_data, 1);
+
+ gpio_direction_input(data->pdata->gpio_data);
+}
+/**
+ * sht15_end_transmission() - notify device of end of transmission
+ * @data: device state
+ *
+ * This is basically a NAK. (single clock pulse, data high)
+ **/
+static void sht15_end_transmission(struct sht15_data *data)
+{
+ gpio_direction_output(data->pdata->gpio_data, 1);
+ ndelay(SHT15_TSU);
+ gpio_set_value(data->pdata->gpio_sck, 1);
+ ndelay(SHT15_TSCKH);
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSCKL);
+}
+
+static void sht15_bh_read_data(struct work_struct *work_s)
+{
+ int i;
+ uint16_t val = 0;
+ struct sht15_data *data
+ = container_of(work_s, struct sht15_data,
+ read_work);
+ /* Firstly, verify the line is low */
+ if (gpio_get_value(data->pdata->gpio_data)) {
+ /* If not, then start the interrupt again - care
+ here as could have gone low in meantime so verify
+ it hasn't!
+ */
+ atomic_set(&data->interrupt_handled, 0);
+ enable_irq(gpio_to_irq(data->pdata->gpio_data));
+ /* If still not occured or another handler has been scheduled */
+ if (gpio_get_value(data->pdata->gpio_data)
+ || atomic_read(&data->interrupt_handled))
+ return;
+ }
+ /* Read the data back from the device */
+ for (i = 0; i < 16; ++i) {
+ val <<= 1;
+ gpio_set_value(data->pdata->gpio_sck, 1);
+ ndelay(SHT15_TSCKH);
+ val |= !!gpio_get_value(data->pdata->gpio_data);
+ gpio_set_value(data->pdata->gpio_sck, 0);
+ ndelay(SHT15_TSCKL);
+ if (i == 7)
+ sht15_ack(data);
+ }
+ /* Tell the device we are done */
+ sht15_end_transmission(data);
+
+ switch (data->flag) {
+ case SHT15_READING_TEMP:
+ data->val_temp = val;
+ break;
+ case SHT15_READING_HUMID:
+ data->val_humid = val;
+ break;
+ }
+
+ data->flag = SHT15_READING_NOTHING;
+ wake_up(&data->wait_queue);
+}
+
+static void sht15_update_voltage(struct work_struct *work_s)
+{
+ struct sht15_data *data
+ = container_of(work_s, struct sht15_data,
+ update_supply_work);
+ data->supply_uV = regulator_get_voltage(data->reg);
+}
+
+/**
+ * sht15_invalidate_voltage() - mark supply voltage invalid when notified by reg
+ * @nb: associated notification structure
+ * @event: voltage regulator state change event code
+ * @ignored: function parameter - ignored here
+ *
+ * Note that as the notification code holds the regulator lock, we have
+ * to schedule an update of the supply voltage rather than getting it directly.
+ **/
+static int sht15_invalidate_voltage(struct notifier_block *nb,
+ unsigned long event,
+ void *ignored)
+{
+ struct sht15_data *data = container_of(nb, struct sht15_data, nb);
+
+ if (event == REGULATOR_EVENT_VOLTAGE_CHANGE)
+ data->supply_uV_valid = false;
+ schedule_work(&data->update_supply_work);
+
+ return NOTIFY_OK;
+}
+
+static int __devinit sht15_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct sht15_data *data = kzalloc(sizeof(*data), GFP_KERNEL);
+
+ if (!data) {
+ ret = -ENOMEM;
+ dev_err(&pdev->dev, "kzalloc failed");
+ goto error_ret;
+ }
+
+ INIT_WORK(&data->read_work, sht15_bh_read_data);
+ INIT_WORK(&data->update_supply_work, sht15_update_voltage);
+ platform_set_drvdata(pdev, data);
+ mutex_init(&data->read_lock);
+ data->dev = &pdev->dev;
+ init_waitqueue_head(&data->wait_queue);
+
+ if (pdev->dev.platform_data == NULL) {
+ dev_err(&pdev->dev, "no platform data supplied");
+ goto err_free_data;
+ }
+ data->pdata = pdev->dev.platform_data;
+ data->supply_uV = data->pdata->supply_mv*1000;
+
+/* If a regulator is available, query what the supply voltage actually is!*/
+ data->reg = regulator_get(data->dev, "vcc");
+ if (!IS_ERR(data->reg)) {
+ data->supply_uV = regulator_get_voltage(data->reg);
+ regulator_enable(data->reg);
+ /* setup a notifier block to update this if another device
+ * causes the voltage to change */
+ data->nb.notifier_call = &sht15_invalidate_voltage;
+ ret = regulator_register_notifier(data->reg, &data->nb);
+ }
+/* Try requesting the GPIOs */
+ ret = gpio_request(data->pdata->gpio_sck, "SHT15 sck");
+ if (ret) {
+ dev_err(&pdev->dev, "gpio request failed");
+ goto err_free_data;
+ }
+ gpio_direction_output(data->pdata->gpio_sck, 0);
+ ret = gpio_request(data->pdata->gpio_data, "SHT15 data");
+ if (ret) {
+ dev_err(&pdev->dev, "gpio request failed");
+ goto err_release_gpio_sck;
+ }
+ ret = sysfs_create_group(&pdev->dev.kobj, &sht15_attr_group);
+ if (ret) {
+ dev_err(&pdev->dev, "sysfs create failed");
+ goto err_free_data;
+ }
+
+ ret = request_irq(gpio_to_irq(data->pdata->gpio_data),
+ sht15_interrupt_fired,
+ IRQF_TRIGGER_FALLING,
+ "sht15 data",
+ data);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get irq for data line");
+ goto err_release_gpio_data;
+ }
+ disable_irq_nosync(gpio_to_irq(data->pdata->gpio_data));
+ sht15_connection_reset(data);
+ sht15_send_cmd(data, 0x1E);
+
+ data->hwmon_dev = hwmon_device_register(data->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ ret = PTR_ERR(data->hwmon_dev);
+ goto err_release_gpio_data;
+ }
+ return 0;
+
+err_release_gpio_data:
+ gpio_free(data->pdata->gpio_data);
+err_release_gpio_sck:
+ gpio_free(data->pdata->gpio_sck);
+err_free_data:
+ kfree(data);
+error_ret:
+
+ return ret;
+}
+
+static int __devexit sht15_remove(struct platform_device *pdev)
+{
+ struct sht15_data *data = platform_get_drvdata(pdev);
+
+ /* Make sure any reads from the device are done and
+ * prevent new ones beginnning */
+ mutex_lock(&data->read_lock);
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&pdev->dev.kobj, &sht15_attr_group);
+ if (!IS_ERR(data->reg)) {
+ regulator_unregister_notifier(data->reg, &data->nb);
+ regulator_disable(data->reg);
+ regulator_put(data->reg);
+ }
+
+ free_irq(gpio_to_irq(data->pdata->gpio_data), data);
+ gpio_free(data->pdata->gpio_data);
+ gpio_free(data->pdata->gpio_sck);
+ mutex_unlock(&data->read_lock);
+ kfree(data);
+ return 0;
+}
+
+
+static struct platform_driver sht_drivers[] = {
+ {
+ .driver = {
+ .name = "sht10",
+ .owner = THIS_MODULE,
+ },
+ .probe = sht15_probe,
+ .remove = sht15_remove,
+ }, {
+ .driver = {
+ .name = "sht11",
+ .owner = THIS_MODULE,
+ },
+ .probe = sht15_probe,
+ .remove = sht15_remove,
+ }, {
+ .driver = {
+ .name = "sht15",
+ .owner = THIS_MODULE,
+ },
+ .probe = sht15_probe,
+ .remove = sht15_remove,
+ }, {
+ .driver = {
+ .name = "sht71",
+ .owner = THIS_MODULE,
+ },
+ .probe = sht15_probe,
+ .remove = sht15_remove,
+ }, {
+ .driver = {
+ .name = "sht75",
+ .owner = THIS_MODULE,
+ },
+ .probe = sht15_probe,
+ .remove = sht15_remove,
+ },
+};
+
+
+static int __init sht15_init(void)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sht_drivers); i++) {
+ ret = platform_driver_register(&sht_drivers[i]);
+ if (ret)
+ goto error_unreg;
+ }
+
+ return 0;
+
+error_unreg:
+ while (--i >= 0)
+ platform_driver_unregister(&sht_drivers[i]);
+
+ return ret;
+}
+module_init(sht15_init);
+
+static void __exit sht15_exit(void)
+{
+ int i;
+ for (i = ARRAY_SIZE(sht_drivers) - 1; i >= 0; i--)
+ platform_driver_unregister(&sht_drivers[i]);
+}
+module_exit(sht15_exit);
+
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-13 10:34:48 +0000