diff --git a/drivers/hwmon/asus_atk0110.c b/drivers/hwmon/asus_atk0110.c
index 19f3fd32e10a1656059923dc7c779910152bb898..5a3ee00c0e7d2b65baafde7fefdb62a9fe935262 100644
--- a/drivers/hwmon/asus_atk0110.c
+++ b/drivers/hwmon/asus_atk0110.c
@@ -35,18 +35,22 @@
#define METHOD_OLD_ENUM_FAN "FSIF"
#define ATK_MUX_HWMON 0x00000006ULL
+#define ATK_MUX_MGMT 0x00000011ULL
#define ATK_CLASS_MASK 0xff000000ULL
#define ATK_CLASS_FREQ_CTL 0x03000000ULL
#define ATK_CLASS_FAN_CTL 0x04000000ULL
#define ATK_CLASS_HWMON 0x06000000ULL
+#define ATK_CLASS_MGMT 0x11000000ULL
#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
+#define ATK_ELEMENT_ID_MASK 0x0000ffffULL
+
+#define ATK_EC_ID 0x11060004ULL
enum atk_pack_member {
HWMON_PACK_FLAGS,
@@ -89,6 +93,9 @@ struct atk_data {
/* new inteface */
acpi_handle enumerate_handle;
acpi_handle read_handle;
+ acpi_handle write_handle;
+
+ bool disable_ec;
int voltage_count;
int temperature_count;
@@ -529,6 +536,43 @@ static union acpi_object *atk_gitm(struct atk_data *data, u64 id)
return obj;
}
+static union acpi_object *atk_sitm(struct atk_data *data,
+ struct atk_acpi_input_buf *buf)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ struct acpi_object_list params;
+ union acpi_object tmp;
+ struct acpi_buffer ret;
+ union acpi_object *obj;
+ acpi_status status;
+
+ tmp.type = ACPI_TYPE_BUFFER;
+ tmp.buffer.pointer = (u8 *)buf;
+ tmp.buffer.length = sizeof(*buf);
+
+ params.count = 1;
+ params.pointer = &tmp;
+
+ ret.length = ACPI_ALLOCATE_BUFFER;
+ status = acpi_evaluate_object_typed(data->write_handle, NULL, ¶ms,
+ &ret, ACPI_TYPE_BUFFER);
+ if (status != AE_OK) {
+ dev_warn(dev, "SITM[%#x] ACPI exception: %s\n", buf->id,
+ acpi_format_exception(status));
+ return ERR_PTR(-EIO);
+ }
+ obj = ret.pointer;
+
+ /* Sanity check */
+ if (obj->buffer.length < 8) {
+ dev_warn(dev, "Unexpected ASBF length: %u\n",
+ obj->buffer.length);
+ ACPI_FREE(obj);
+ return ERR_PTR(-EIO);
+ }
+ return obj;
+}
+
static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value)
{
struct atk_data *data = sensor->data;
@@ -784,6 +828,111 @@ static int atk_enumerate_old_hwmon(struct atk_data *data)
return ret;
}
+static int atk_ec_present(struct atk_data *data)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ union acpi_object *pack;
+ union acpi_object *ec;
+ int ret;
+ int i;
+
+ pack = atk_ggrp(data, ATK_MUX_MGMT);
+ if (IS_ERR(pack)) {
+ if (PTR_ERR(pack) == -ENOENT) {
+ /* The MGMT class does not exists - that's ok */
+ dev_dbg(dev, "Class %#llx not found\n", ATK_MUX_MGMT);
+ return 0;
+ }
+ return PTR_ERR(pack);
+ }
+
+ /* Search the EC */
+ ec = NULL;
+ for (i = 0; i < pack->package.count; i++) {
+ union acpi_object *obj = &pack->package.elements[i];
+ union acpi_object *id;
+
+ if (obj->type != ACPI_TYPE_PACKAGE)
+ continue;
+
+ id = &obj->package.elements[0];
+ if (id->type != ACPI_TYPE_INTEGER)
+ continue;
+
+ if (id->integer.value == ATK_EC_ID) {
+ ec = obj;
+ break;
+ }
+ }
+
+ ret = (ec != NULL);
+ if (!ret)
+ /* The system has no EC */
+ dev_dbg(dev, "EC not found\n");
+
+ ACPI_FREE(pack);
+ return ret;
+}
+
+static int atk_ec_enabled(struct atk_data *data)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ union acpi_object *obj;
+ struct atk_acpi_ret_buffer *buf;
+ int err;
+
+ obj = atk_gitm(data, ATK_EC_ID);
+ if (IS_ERR(obj)) {
+ dev_err(dev, "Unable to query EC status\n");
+ return PTR_ERR(obj);
+ }
+ buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
+
+ if (buf->flags == 0) {
+ dev_err(dev, "Unable to query EC status\n");
+ err = -EIO;
+ } else {
+ err = (buf->value != 0);
+ dev_dbg(dev, "EC is %sabled\n",
+ err ? "en" : "dis");
+ }
+
+ ACPI_FREE(obj);
+ return err;
+}
+
+static int atk_ec_ctl(struct atk_data *data, int enable)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ union acpi_object *obj;
+ struct atk_acpi_input_buf sitm;
+ struct atk_acpi_ret_buffer *ec_ret;
+ int err = 0;
+
+ sitm.id = ATK_EC_ID;
+ sitm.param1 = enable;
+ sitm.param2 = 0;
+
+ obj = atk_sitm(data, &sitm);
+ if (IS_ERR(obj)) {
+ dev_err(dev, "Failed to %sable the EC\n",
+ enable ? "en" : "dis");
+ return PTR_ERR(obj);
+ }
+ ec_ret = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
+ if (ec_ret->flags == 0) {
+ dev_err(dev, "Failed to %sable the EC\n",
+ enable ? "en" : "dis");
+ err = -EIO;
+ } else {
+ dev_info(dev, "EC %sabled\n",
+ enable ? "en" : "dis");
+ }
+
+ ACPI_FREE(obj);
+ return err;
+}
+
static int atk_enumerate_new_hwmon(struct atk_data *data)
{
struct device *dev = &data->acpi_dev->dev;
@@ -791,6 +940,23 @@ static int atk_enumerate_new_hwmon(struct atk_data *data)
int err;
int i;
+ err = atk_ec_present(data);
+ if (err < 0)
+ return err;
+ if (err) {
+ err = atk_ec_enabled(data);
+ if (err < 0)
+ return err;
+ /* If the EC was disabled we will disable it again on unload */
+ data->disable_ec = err;
+
+ err = atk_ec_ctl(data, 1);
+ if (err) {
+ data->disable_ec = false;
+ return err;
+ }
+ }
+
dev_dbg(dev, "Enumerating hwmon sensors\n");
pack = atk_ggrp(data, ATK_MUX_HWMON);
@@ -941,6 +1107,15 @@ static int atk_check_new_if(struct atk_data *data)
}
data->read_handle = ret;
+ /* De-multiplexer (write) */
+ status = acpi_get_handle(data->atk_handle, METHOD_WRITE, &ret);
+ if (status != AE_OK) {
+ dev_dbg(dev, "method " METHOD_READ " not found: %s\n",
+ acpi_format_exception(status));
+ return -ENODEV;
+ }
+ data->write_handle = ret;
+
return 0;
}
@@ -961,6 +1136,7 @@ static int atk_add(struct acpi_device *device)
data->acpi_dev = device;
data->atk_handle = device->handle;
INIT_LIST_HEAD(&data->sensor_list);
+ data->disable_ec = false;
buf.length = ACPI_ALLOCATE_BUFFER;
ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL,
@@ -1019,6 +1195,8 @@ static int atk_add(struct acpi_device *device)
cleanup:
atk_free_sensors(data);
out:
+ if (data->disable_ec)
+ atk_ec_ctl(data, 0);
kfree(data);
return err;
}
@@ -1034,6 +1212,11 @@ static int atk_remove(struct acpi_device *device, int type)
atk_free_sensors(data);
hwmon_device_unregister(data->hwmon_dev);
+ if (data->disable_ec) {
+ if (atk_ec_ctl(data, 0))
+ dev_err(&device->dev, "Failed to disable EC\n");
+ }
+
kfree(data);
return 0;