On Fri, Apr 29, 2011 at 06:53:12PM +0200, Jean Delvare wrote:
> As discussed earlier, the ACPI power meter driver would better live
> in drivers/hwmon, as its only purpose is to create hwmon-style
> interfaces for ACPI 4.0 power meter devices. Users are more likely to
> look for it there, and less likely to accidentally hide it by
> unselecting its dependencies.
>
> Signed-off-by: Jean Delvare <khali@xxxxxxxxxxxx>
> Cc: "Darrick J. Wong" <djwong@xxxxxxxxxx>
Acked-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> Cc: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx>
> Cc: Len Brown <lenb@xxxxxxxxxx>
> ---
> drivers/acpi/Kconfig | 11
> drivers/acpi/Makefile | 1
> drivers/acpi/power_meter.c | 1023 --------------------------------------
> drivers/hwmon/Kconfig | 10
> drivers/hwmon/Makefile | 1
> drivers/hwmon/acpi_power_meter.c | 1023 ++++++++++++++++++++++++++++++++++++++
> 6 files changed, 1034 insertions(+), 1035 deletions(-)
>
> --- linux-2.6.39-rc5.orig/drivers/acpi/Kconfig 2011-03-30 10:57:16.000000000 +0200
> +++ linux-2.6.39-rc5/drivers/acpi/Kconfig 2011-04-29 18:06:00.000000000 +0200
> @@ -73,17 +73,6 @@ config ACPI_PROCFS_POWER
>
> Say N to delete power /proc/acpi/ directories that have moved to /sys/
>
> -config ACPI_POWER_METER
> - tristate "ACPI 4.0 power meter"
> - depends on HWMON
> - help
> - This driver exposes ACPI 4.0 power meters as hardware monitoring
> - devices. Say Y (or M) if you have a computer with ACPI 4.0 firmware
> - and a power meter.
> -
> - To compile this driver as a module, choose M here:
> - the module will be called power-meter.
> -
> config ACPI_EC_DEBUGFS
> tristate "EC read/write access through /sys/kernel/debug/ec"
> default n
> --- linux-2.6.39-rc5.orig/drivers/acpi/Makefile 2011-03-15 22:52:47.000000000 +0100
> +++ linux-2.6.39-rc5/drivers/acpi/Makefile 2011-04-29 18:06:50.000000000 +0200
> @@ -59,7 +59,6 @@ obj-$(CONFIG_ACPI_HOTPLUG_MEMORY) += acp
> obj-$(CONFIG_ACPI_BATTERY) += battery.o
> obj-$(CONFIG_ACPI_SBS) += sbshc.o
> obj-$(CONFIG_ACPI_SBS) += sbs.o
> -obj-$(CONFIG_ACPI_POWER_METER) += power_meter.o
> obj-$(CONFIG_ACPI_HED) += hed.o
> obj-$(CONFIG_ACPI_EC_DEBUGFS) += ec_sys.o
>
> --- linux-2.6.39-rc5.orig/drivers/acpi/power_meter.c 2010-08-02 00:11:14.000000000 +0200
> +++ /dev/null 1970-01-01 00:00:00.000000000 +0000
> @@ -1,1023 +0,0 @@
> -/*
> - * A hwmon driver for ACPI 4.0 power meters
> - * Copyright (C) 2009 IBM
> - *
> - * Author: Darrick J. Wong <djwong@xxxxxxxxxx>
> - *
> - * 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.
> - *
> - * You should have received a copy of the GNU General Public License
> - * along with this program; if not, write to the Free Software
> - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> - */
> -
> -#include <linux/module.h>
> -#include <linux/hwmon.h>
> -#include <linux/hwmon-sysfs.h>
> -#include <linux/jiffies.h>
> -#include <linux/mutex.h>
> -#include <linux/dmi.h>
> -#include <linux/slab.h>
> -#include <linux/kdev_t.h>
> -#include <linux/sched.h>
> -#include <linux/time.h>
> -#include <acpi/acpi_drivers.h>
> -#include <acpi/acpi_bus.h>
> -
> -#define ACPI_POWER_METER_NAME "power_meter"
> -ACPI_MODULE_NAME(ACPI_POWER_METER_NAME);
> -#define ACPI_POWER_METER_DEVICE_NAME "Power Meter"
> -#define ACPI_POWER_METER_CLASS "pwr_meter_resource"
> -
> -#define NUM_SENSORS 17
> -
> -#define POWER_METER_CAN_MEASURE (1 << 0)
> -#define POWER_METER_CAN_TRIP (1 << 1)
> -#define POWER_METER_CAN_CAP (1 << 2)
> -#define POWER_METER_CAN_NOTIFY (1 << 3)
> -#define POWER_METER_IS_BATTERY (1 << 8)
> -#define UNKNOWN_HYSTERESIS 0xFFFFFFFF
> -
> -#define METER_NOTIFY_CONFIG 0x80
> -#define METER_NOTIFY_TRIP 0x81
> -#define METER_NOTIFY_CAP 0x82
> -#define METER_NOTIFY_CAPPING 0x83
> -#define METER_NOTIFY_INTERVAL 0x84
> -
> -#define POWER_AVERAGE_NAME "power1_average"
> -#define POWER_CAP_NAME "power1_cap"
> -#define POWER_AVG_INTERVAL_NAME "power1_average_interval"
> -#define POWER_ALARM_NAME "power1_alarm"
> -
> -static int cap_in_hardware;
> -static int force_cap_on;
> -
> -static int can_cap_in_hardware(void)
> -{
> - return force_cap_on || cap_in_hardware;
> -}
> -
> -static const struct acpi_device_id power_meter_ids[] = {
> - {"ACPI000D", 0},
> - {"", 0},
> -};
> -MODULE_DEVICE_TABLE(acpi, power_meter_ids);
> -
> -struct acpi_power_meter_capabilities {
> - u64 flags;
> - u64 units;
> - u64 type;
> - u64 accuracy;
> - u64 sampling_time;
> - u64 min_avg_interval;
> - u64 max_avg_interval;
> - u64 hysteresis;
> - u64 configurable_cap;
> - u64 min_cap;
> - u64 max_cap;
> -};
> -
> -struct acpi_power_meter_resource {
> - struct acpi_device *acpi_dev;
> - acpi_bus_id name;
> - struct mutex lock;
> - struct device *hwmon_dev;
> - struct acpi_power_meter_capabilities caps;
> - acpi_string model_number;
> - acpi_string serial_number;
> - acpi_string oem_info;
> - u64 power;
> - u64 cap;
> - u64 avg_interval;
> - int sensors_valid;
> - unsigned long sensors_last_updated;
> - struct sensor_device_attribute sensors[NUM_SENSORS];
> - int num_sensors;
> - int trip[2];
> - int num_domain_devices;
> - struct acpi_device **domain_devices;
> - struct kobject *holders_dir;
> -};
> -
> -struct ro_sensor_template {
> - char *label;
> - ssize_t (*show)(struct device *dev,
> - struct device_attribute *devattr,
> - char *buf);
> - int index;
> -};
> -
> -struct rw_sensor_template {
> - char *label;
> - ssize_t (*show)(struct device *dev,
> - struct device_attribute *devattr,
> - char *buf);
> - ssize_t (*set)(struct device *dev,
> - struct device_attribute *devattr,
> - const char *buf, size_t count);
> - int index;
> -};
> -
> -/* Averaging interval */
> -static int update_avg_interval(struct acpi_power_meter_resource *resource)
> -{
> - unsigned long long data;
> - acpi_status status;
> -
> - status = acpi_evaluate_integer(resource->acpi_dev->handle, "_GAI",
> - NULL, &data);
> - if (ACPI_FAILURE(status)) {
> - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _GAI"));
> - return -ENODEV;
> - }
> -
> - resource->avg_interval = data;
> - return 0;
> -}
> -
> -static ssize_t show_avg_interval(struct device *dev,
> - struct device_attribute *devattr,
> - char *buf)
> -{
> - struct acpi_device *acpi_dev = to_acpi_device(dev);
> - struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> -
> - mutex_lock(&resource->lock);
> - update_avg_interval(resource);
> - mutex_unlock(&resource->lock);
> -
> - return sprintf(buf, "%llu\n", resource->avg_interval);
> -}
> -
> -static ssize_t set_avg_interval(struct device *dev,
> - struct device_attribute *devattr,
> - const char *buf, size_t count)
> -{
> - struct acpi_device *acpi_dev = to_acpi_device(dev);
> - struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> - union acpi_object arg0 = { ACPI_TYPE_INTEGER };
> - struct acpi_object_list args = { 1, &arg0 };
> - int res;
> - unsigned long temp;
> - unsigned long long data;
> - acpi_status status;
> -
> - res = strict_strtoul(buf, 10, &temp);
> - if (res)
> - return res;
> -
> - if (temp > resource->caps.max_avg_interval ||
> - temp < resource->caps.min_avg_interval)
> - return -EINVAL;
> - arg0.integer.value = temp;
> -
> - mutex_lock(&resource->lock);
> - status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PAI",
> - &args, &data);
> - if (!ACPI_FAILURE(status))
> - resource->avg_interval = temp;
> - mutex_unlock(&resource->lock);
> -
> - if (ACPI_FAILURE(status)) {
> - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PAI"));
> - return -EINVAL;
> - }
> -
> - /* _PAI returns 0 on success, nonzero otherwise */
> - if (data)
> - return -EINVAL;
> -
> - return count;
> -}
> -
> -/* Cap functions */
> -static int update_cap(struct acpi_power_meter_resource *resource)
> -{
> - unsigned long long data;
> - acpi_status status;
> -
> - status = acpi_evaluate_integer(resource->acpi_dev->handle, "_GHL",
> - NULL, &data);
> - if (ACPI_FAILURE(status)) {
> - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _GHL"));
> - return -ENODEV;
> - }
> -
> - resource->cap = data;
> - return 0;
> -}
> -
> -static ssize_t show_cap(struct device *dev,
> - struct device_attribute *devattr,
> - char *buf)
> -{
> - struct acpi_device *acpi_dev = to_acpi_device(dev);
> - struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> -
> - mutex_lock(&resource->lock);
> - update_cap(resource);
> - mutex_unlock(&resource->lock);
> -
> - return sprintf(buf, "%llu\n", resource->cap * 1000);
> -}
> -
> -static ssize_t set_cap(struct device *dev, struct device_attribute *devattr,
> - const char *buf, size_t count)
> -{
> - struct acpi_device *acpi_dev = to_acpi_device(dev);
> - struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> - union acpi_object arg0 = { ACPI_TYPE_INTEGER };
> - struct acpi_object_list args = { 1, &arg0 };
> - int res;
> - unsigned long temp;
> - unsigned long long data;
> - acpi_status status;
> -
> - res = strict_strtoul(buf, 10, &temp);
> - if (res)
> - return res;
> -
> - temp /= 1000;
> - if (temp > resource->caps.max_cap || temp < resource->caps.min_cap)
> - return -EINVAL;
> - arg0.integer.value = temp;
> -
> - mutex_lock(&resource->lock);
> - status = acpi_evaluate_integer(resource->acpi_dev->handle, "_SHL",
> - &args, &data);
> - if (!ACPI_FAILURE(status))
> - resource->cap = temp;
> - mutex_unlock(&resource->lock);
> -
> - if (ACPI_FAILURE(status)) {
> - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SHL"));
> - return -EINVAL;
> - }
> -
> - /* _SHL returns 0 on success, nonzero otherwise */
> - if (data)
> - return -EINVAL;
> -
> - return count;
> -}
> -
> -/* Power meter trip points */
> -static int set_acpi_trip(struct acpi_power_meter_resource *resource)
> -{
> - union acpi_object arg_objs[] = {
> - {ACPI_TYPE_INTEGER},
> - {ACPI_TYPE_INTEGER}
> - };
> - struct acpi_object_list args = { 2, arg_objs };
> - unsigned long long data;
> - acpi_status status;
> -
> - /* Both trip levels must be set */
> - if (resource->trip[0] < 0 || resource->trip[1] < 0)
> - return 0;
> -
> - /* This driver stores min, max; ACPI wants max, min. */
> - arg_objs[0].integer.value = resource->trip[1];
> - arg_objs[1].integer.value = resource->trip[0];
> -
> - status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PTP",
> - &args, &data);
> - if (ACPI_FAILURE(status)) {
> - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTP"));
> - return -EINVAL;
> - }
> -
> - /* _PTP returns 0 on success, nonzero otherwise */
> - if (data)
> - return -EINVAL;
> -
> - return 0;
> -}
> -
> -static ssize_t set_trip(struct device *dev, struct device_attribute *devattr,
> - const char *buf, size_t count)
> -{
> - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> - struct acpi_device *acpi_dev = to_acpi_device(dev);
> - struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> - int res;
> - unsigned long temp;
> -
> - res = strict_strtoul(buf, 10, &temp);
> - if (res)
> - return res;
> -
> - temp /= 1000;
> - if (temp < 0)
> - return -EINVAL;
> -
> - mutex_lock(&resource->lock);
> - resource->trip[attr->index - 7] = temp;
> - res = set_acpi_trip(resource);
> - mutex_unlock(&resource->lock);
> -
> - if (res)
> - return res;
> -
> - return count;
> -}
> -
> -/* Power meter */
> -static int update_meter(struct acpi_power_meter_resource *resource)
> -{
> - unsigned long long data;
> - acpi_status status;
> - unsigned long local_jiffies = jiffies;
> -
> - if (time_before(local_jiffies, resource->sensors_last_updated +
> - msecs_to_jiffies(resource->caps.sampling_time)) &&
> - resource->sensors_valid)
> - return 0;
> -
> - status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PMM",
> - NULL, &data);
> - if (ACPI_FAILURE(status)) {
> - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMM"));
> - return -ENODEV;
> - }
> -
> - resource->power = data;
> - resource->sensors_valid = 1;
> - resource->sensors_last_updated = jiffies;
> - return 0;
> -}
> -
> -static ssize_t show_power(struct device *dev,
> - struct device_attribute *devattr,
> - char *buf)
> -{
> - struct acpi_device *acpi_dev = to_acpi_device(dev);
> - struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> -
> - mutex_lock(&resource->lock);
> - update_meter(resource);
> - mutex_unlock(&resource->lock);
> -
> - return sprintf(buf, "%llu\n", resource->power * 1000);
> -}
> -
> -/* Miscellaneous */
> -static ssize_t show_str(struct device *dev,
> - struct device_attribute *devattr,
> - char *buf)
> -{
> - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> - struct acpi_device *acpi_dev = to_acpi_device(dev);
> - struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> - acpi_string val;
> -
> - switch (attr->index) {
> - case 0:
> - val = resource->model_number;
> - break;
> - case 1:
> - val = resource->serial_number;
> - break;
> - case 2:
> - val = resource->oem_info;
> - break;
> - default:
> - BUG();
> - }
> -
> - return sprintf(buf, "%s\n", val);
> -}
> -
> -static ssize_t show_val(struct device *dev,
> - struct device_attribute *devattr,
> - char *buf)
> -{
> - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> - struct acpi_device *acpi_dev = to_acpi_device(dev);
> - struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> - u64 val = 0;
> -
> - switch (attr->index) {
> - case 0:
> - val = resource->caps.min_avg_interval;
> - break;
> - case 1:
> - val = resource->caps.max_avg_interval;
> - break;
> - case 2:
> - val = resource->caps.min_cap * 1000;
> - break;
> - case 3:
> - val = resource->caps.max_cap * 1000;
> - break;
> - case 4:
> - if (resource->caps.hysteresis == UNKNOWN_HYSTERESIS)
> - return sprintf(buf, "unknown\n");
> -
> - val = resource->caps.hysteresis * 1000;
> - break;
> - case 5:
> - if (resource->caps.flags & POWER_METER_IS_BATTERY)
> - val = 1;
> - else
> - val = 0;
> - break;
> - case 6:
> - if (resource->power > resource->cap)
> - val = 1;
> - else
> - val = 0;
> - break;
> - case 7:
> - case 8:
> - if (resource->trip[attr->index - 7] < 0)
> - return sprintf(buf, "unknown\n");
> -
> - val = resource->trip[attr->index - 7] * 1000;
> - break;
> - default:
> - BUG();
> - }
> -
> - return sprintf(buf, "%llu\n", val);
> -}
> -
> -static ssize_t show_accuracy(struct device *dev,
> - struct device_attribute *devattr,
> - char *buf)
> -{
> - struct acpi_device *acpi_dev = to_acpi_device(dev);
> - struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> - unsigned int acc = resource->caps.accuracy;
> -
> - return sprintf(buf, "%u.%u%%\n", acc / 1000, acc % 1000);
> -}
> -
> -static ssize_t show_name(struct device *dev,
> - struct device_attribute *devattr,
> - char *buf)
> -{
> - return sprintf(buf, "%s\n", ACPI_POWER_METER_NAME);
> -}
> -
> -/* Sensor descriptions. If you add a sensor, update NUM_SENSORS above! */
> -static struct ro_sensor_template meter_ro_attrs[] = {
> -{POWER_AVERAGE_NAME, show_power, 0},
> -{"power1_accuracy", show_accuracy, 0},
> -{"power1_average_interval_min", show_val, 0},
> -{"power1_average_interval_max", show_val, 1},
> -{"power1_is_battery", show_val, 5},
> -{NULL, NULL, 0},
> -};
> -
> -static struct rw_sensor_template meter_rw_attrs[] = {
> -{POWER_AVG_INTERVAL_NAME, show_avg_interval, set_avg_interval, 0},
> -{NULL, NULL, NULL, 0},
> -};
> -
> -static struct ro_sensor_template misc_cap_attrs[] = {
> -{"power1_cap_min", show_val, 2},
> -{"power1_cap_max", show_val, 3},
> -{"power1_cap_hyst", show_val, 4},
> -{POWER_ALARM_NAME, show_val, 6},
> -{NULL, NULL, 0},
> -};
> -
> -static struct ro_sensor_template ro_cap_attrs[] = {
> -{POWER_CAP_NAME, show_cap, 0},
> -{NULL, NULL, 0},
> -};
> -
> -static struct rw_sensor_template rw_cap_attrs[] = {
> -{POWER_CAP_NAME, show_cap, set_cap, 0},
> -{NULL, NULL, NULL, 0},
> -};
> -
> -static struct rw_sensor_template trip_attrs[] = {
> -{"power1_average_min", show_val, set_trip, 7},
> -{"power1_average_max", show_val, set_trip, 8},
> -{NULL, NULL, NULL, 0},
> -};
> -
> -static struct ro_sensor_template misc_attrs[] = {
> -{"name", show_name, 0},
> -{"power1_model_number", show_str, 0},
> -{"power1_oem_info", show_str, 2},
> -{"power1_serial_number", show_str, 1},
> -{NULL, NULL, 0},
> -};
> -
> -/* Read power domain data */
> -static void remove_domain_devices(struct acpi_power_meter_resource *resource)
> -{
> - int i;
> -
> - if (!resource->num_domain_devices)
> - return;
> -
> - for (i = 0; i < resource->num_domain_devices; i++) {
> - struct acpi_device *obj = resource->domain_devices[i];
> - if (!obj)
> - continue;
> -
> - sysfs_remove_link(resource->holders_dir,
> - kobject_name(&obj->dev.kobj));
> - put_device(&obj->dev);
> - }
> -
> - kfree(resource->domain_devices);
> - kobject_put(resource->holders_dir);
> - resource->num_domain_devices = 0;
> -}
> -
> -static int read_domain_devices(struct acpi_power_meter_resource *resource)
> -{
> - int res = 0;
> - int i;
> - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
> - union acpi_object *pss;
> - acpi_status status;
> -
> - status = acpi_evaluate_object(resource->acpi_dev->handle, "_PMD", NULL,
> - &buffer);
> - if (ACPI_FAILURE(status)) {
> - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMD"));
> - return -ENODEV;
> - }
> -
> - pss = buffer.pointer;
> - if (!pss ||
> - pss->type != ACPI_TYPE_PACKAGE) {
> - dev_err(&resource->acpi_dev->dev, ACPI_POWER_METER_NAME
> - "Invalid _PMD data\n");
> - res = -EFAULT;
> - goto end;
> - }
> -
> - if (!pss->package.count)
> - goto end;
> -
> - resource->domain_devices = kzalloc(sizeof(struct acpi_device *) *
> - pss->package.count, GFP_KERNEL);
> - if (!resource->domain_devices) {
> - res = -ENOMEM;
> - goto end;
> - }
> -
> - resource->holders_dir = kobject_create_and_add("measures",
> - &resource->acpi_dev->dev.kobj);
> - if (!resource->holders_dir) {
> - res = -ENOMEM;
> - goto exit_free;
> - }
> -
> - resource->num_domain_devices = pss->package.count;
> -
> - for (i = 0; i < pss->package.count; i++) {
> - struct acpi_device *obj;
> - union acpi_object *element = &(pss->package.elements[i]);
> -
> - /* Refuse non-references */
> - if (element->type != ACPI_TYPE_LOCAL_REFERENCE)
> - continue;
> -
> - /* Create a symlink to domain objects */
> - resource->domain_devices[i] = NULL;
> - status = acpi_bus_get_device(element->reference.handle,
> - &resource->domain_devices[i]);
> - if (ACPI_FAILURE(status))
> - continue;
> -
> - obj = resource->domain_devices[i];
> - get_device(&obj->dev);
> -
> - res = sysfs_create_link(resource->holders_dir, &obj->dev.kobj,
> - kobject_name(&obj->dev.kobj));
> - if (res) {
> - put_device(&obj->dev);
> - resource->domain_devices[i] = NULL;
> - }
> - }
> -
> - res = 0;
> - goto end;
> -
> -exit_free:
> - kfree(resource->domain_devices);
> -end:
> - kfree(buffer.pointer);
> - return res;
> -}
> -
> -/* Registration and deregistration */
> -static int register_ro_attrs(struct acpi_power_meter_resource *resource,
> - struct ro_sensor_template *ro)
> -{
> - struct device *dev = &resource->acpi_dev->dev;
> - struct sensor_device_attribute *sensors =
> - &resource->sensors[resource->num_sensors];
> - int res = 0;
> -
> - while (ro->label) {
> - sensors->dev_attr.attr.name = ro->label;
> - sensors->dev_attr.attr.mode = S_IRUGO;
> - sensors->dev_attr.show = ro->show;
> - sensors->index = ro->index;
> -
> - res = device_create_file(dev, &sensors->dev_attr);
> - if (res) {
> - sensors->dev_attr.attr.name = NULL;
> - goto error;
> - }
> - sensors++;
> - resource->num_sensors++;
> - ro++;
> - }
> -
> -error:
> - return res;
> -}
> -
> -static int register_rw_attrs(struct acpi_power_meter_resource *resource,
> - struct rw_sensor_template *rw)
> -{
> - struct device *dev = &resource->acpi_dev->dev;
> - struct sensor_device_attribute *sensors =
> - &resource->sensors[resource->num_sensors];
> - int res = 0;
> -
> - while (rw->label) {
> - sensors->dev_attr.attr.name = rw->label;
> - sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR;
> - sensors->dev_attr.show = rw->show;
> - sensors->dev_attr.store = rw->set;
> - sensors->index = rw->index;
> -
> - res = device_create_file(dev, &sensors->dev_attr);
> - if (res) {
> - sensors->dev_attr.attr.name = NULL;
> - goto error;
> - }
> - sensors++;
> - resource->num_sensors++;
> - rw++;
> - }
> -
> -error:
> - return res;
> -}
> -
> -static void remove_attrs(struct acpi_power_meter_resource *resource)
> -{
> - int i;
> -
> - for (i = 0; i < resource->num_sensors; i++) {
> - if (!resource->sensors[i].dev_attr.attr.name)
> - continue;
> - device_remove_file(&resource->acpi_dev->dev,
> - &resource->sensors[i].dev_attr);
> - }
> -
> - remove_domain_devices(resource);
> -
> - resource->num_sensors = 0;
> -}
> -
> -static int setup_attrs(struct acpi_power_meter_resource *resource)
> -{
> - int res = 0;
> -
> - res = read_domain_devices(resource);
> - if (res)
> - return res;
> -
> - if (resource->caps.flags & POWER_METER_CAN_MEASURE) {
> - res = register_ro_attrs(resource, meter_ro_attrs);
> - if (res)
> - goto error;
> - res = register_rw_attrs(resource, meter_rw_attrs);
> - if (res)
> - goto error;
> - }
> -
> - if (resource->caps.flags & POWER_METER_CAN_CAP) {
> - if (!can_cap_in_hardware()) {
> - dev_err(&resource->acpi_dev->dev,
> - "Ignoring unsafe software power cap!\n");
> - goto skip_unsafe_cap;
> - }
> -
> - if (resource->caps.configurable_cap) {
> - res = register_rw_attrs(resource, rw_cap_attrs);
> - if (res)
> - goto error;
> - } else {
> - res = register_ro_attrs(resource, ro_cap_attrs);
> - if (res)
> - goto error;
> - }
> - res = register_ro_attrs(resource, misc_cap_attrs);
> - if (res)
> - goto error;
> - }
> -skip_unsafe_cap:
> -
> - if (resource->caps.flags & POWER_METER_CAN_TRIP) {
> - res = register_rw_attrs(resource, trip_attrs);
> - if (res)
> - goto error;
> - }
> -
> - res = register_ro_attrs(resource, misc_attrs);
> - if (res)
> - goto error;
> -
> - return res;
> -error:
> - remove_attrs(resource);
> - return res;
> -}
> -
> -static void free_capabilities(struct acpi_power_meter_resource *resource)
> -{
> - acpi_string *str;
> - int i;
> -
> - str = &resource->model_number;
> - for (i = 0; i < 3; i++, str++)
> - kfree(*str);
> -}
> -
> -static int read_capabilities(struct acpi_power_meter_resource *resource)
> -{
> - int res = 0;
> - int i;
> - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
> - struct acpi_buffer state = { 0, NULL };
> - struct acpi_buffer format = { sizeof("NNNNNNNNNNN"), "NNNNNNNNNNN" };
> - union acpi_object *pss;
> - acpi_string *str;
> - acpi_status status;
> -
> - status = acpi_evaluate_object(resource->acpi_dev->handle, "_PMC", NULL,
> - &buffer);
> - if (ACPI_FAILURE(status)) {
> - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMC"));
> - return -ENODEV;
> - }
> -
> - pss = buffer.pointer;
> - if (!pss ||
> - pss->type != ACPI_TYPE_PACKAGE ||
> - pss->package.count != 14) {
> - dev_err(&resource->acpi_dev->dev, ACPI_POWER_METER_NAME
> - "Invalid _PMC data\n");
> - res = -EFAULT;
> - goto end;
> - }
> -
> - /* Grab all the integer data at once */
> - state.length = sizeof(struct acpi_power_meter_capabilities);
> - state.pointer = &resource->caps;
> -
> - status = acpi_extract_package(pss, &format, &state);
> - if (ACPI_FAILURE(status)) {
> - ACPI_EXCEPTION((AE_INFO, status, "Invalid data"));
> - res = -EFAULT;
> - goto end;
> - }
> -
> - if (resource->caps.units) {
> - dev_err(&resource->acpi_dev->dev, ACPI_POWER_METER_NAME
> - "Unknown units %llu.\n",
> - resource->caps.units);
> - res = -EINVAL;
> - goto end;
> - }
> -
> - /* Grab the string data */
> - str = &resource->model_number;
> -
> - for (i = 11; i < 14; i++) {
> - union acpi_object *element = &(pss->package.elements[i]);
> -
> - if (element->type != ACPI_TYPE_STRING) {
> - res = -EINVAL;
> - goto error;
> - }
> -
> - *str = kzalloc(sizeof(u8) * (element->string.length + 1),
> - GFP_KERNEL);
> - if (!*str) {
> - res = -ENOMEM;
> - goto error;
> - }
> -
> - strncpy(*str, element->string.pointer, element->string.length);
> - str++;
> - }
> -
> - dev_info(&resource->acpi_dev->dev, "Found ACPI power meter.\n");
> - goto end;
> -error:
> - str = &resource->model_number;
> - for (i = 0; i < 3; i++, str++)
> - kfree(*str);
> -end:
> - kfree(buffer.pointer);
> - return res;
> -}
> -
> -/* Handle ACPI event notifications */
> -static void acpi_power_meter_notify(struct acpi_device *device, u32 event)
> -{
> - struct acpi_power_meter_resource *resource;
> - int res;
> -
> - if (!device || !acpi_driver_data(device))
> - return;
> -
> - resource = acpi_driver_data(device);
> -
> - mutex_lock(&resource->lock);
> - switch (event) {
> - case METER_NOTIFY_CONFIG:
> - free_capabilities(resource);
> - res = read_capabilities(resource);
> - if (res)
> - break;
> -
> - remove_attrs(resource);
> - setup_attrs(resource);
> - break;
> - case METER_NOTIFY_TRIP:
> - sysfs_notify(&device->dev.kobj, NULL, POWER_AVERAGE_NAME);
> - update_meter(resource);
> - break;
> - case METER_NOTIFY_CAP:
> - sysfs_notify(&device->dev.kobj, NULL, POWER_CAP_NAME);
> - update_cap(resource);
> - break;
> - case METER_NOTIFY_INTERVAL:
> - sysfs_notify(&device->dev.kobj, NULL, POWER_AVG_INTERVAL_NAME);
> - update_avg_interval(resource);
> - break;
> - case METER_NOTIFY_CAPPING:
> - sysfs_notify(&device->dev.kobj, NULL, POWER_ALARM_NAME);
> - dev_info(&device->dev, "Capping in progress.\n");
> - break;
> - default:
> - BUG();
> - }
> - mutex_unlock(&resource->lock);
> -
> - acpi_bus_generate_netlink_event(ACPI_POWER_METER_CLASS,
> - dev_name(&device->dev), event, 0);
> -}
> -
> -static int acpi_power_meter_add(struct acpi_device *device)
> -{
> - int res;
> - struct acpi_power_meter_resource *resource;
> -
> - if (!device)
> - return -EINVAL;
> -
> - resource = kzalloc(sizeof(struct acpi_power_meter_resource),
> - GFP_KERNEL);
> - if (!resource)
> - return -ENOMEM;
> -
> - resource->sensors_valid = 0;
> - resource->acpi_dev = device;
> - mutex_init(&resource->lock);
> - strcpy(acpi_device_name(device), ACPI_POWER_METER_DEVICE_NAME);
> - strcpy(acpi_device_class(device), ACPI_POWER_METER_CLASS);
> - device->driver_data = resource;
> -
> - free_capabilities(resource);
> - res = read_capabilities(resource);
> - if (res)
> - goto exit_free;
> -
> - resource->trip[0] = resource->trip[1] = -1;
> -
> - res = setup_attrs(resource);
> - if (res)
> - goto exit_free;
> -
> - resource->hwmon_dev = hwmon_device_register(&device->dev);
> - if (IS_ERR(resource->hwmon_dev)) {
> - res = PTR_ERR(resource->hwmon_dev);
> - goto exit_remove;
> - }
> -
> - res = 0;
> - goto exit;
> -
> -exit_remove:
> - remove_attrs(resource);
> -exit_free:
> - kfree(resource);
> -exit:
> - return res;
> -}
> -
> -static int acpi_power_meter_remove(struct acpi_device *device, int type)
> -{
> - struct acpi_power_meter_resource *resource;
> -
> - if (!device || !acpi_driver_data(device))
> - return -EINVAL;
> -
> - resource = acpi_driver_data(device);
> - hwmon_device_unregister(resource->hwmon_dev);
> -
> - free_capabilities(resource);
> - remove_attrs(resource);
> -
> - kfree(resource);
> - return 0;
> -}
> -
> -static int acpi_power_meter_resume(struct acpi_device *device)
> -{
> - struct acpi_power_meter_resource *resource;
> -
> - if (!device || !acpi_driver_data(device))
> - return -EINVAL;
> -
> - resource = acpi_driver_data(device);
> - free_capabilities(resource);
> - read_capabilities(resource);
> -
> - return 0;
> -}
> -
> -static struct acpi_driver acpi_power_meter_driver = {
> - .name = "power_meter",
> - .class = ACPI_POWER_METER_CLASS,
> - .ids = power_meter_ids,
> - .ops = {
> - .add = acpi_power_meter_add,
> - .remove = acpi_power_meter_remove,
> - .resume = acpi_power_meter_resume,
> - .notify = acpi_power_meter_notify,
> - },
> -};
> -
> -/* Module init/exit routines */
> -static int __init enable_cap_knobs(const struct dmi_system_id *d)
> -{
> - cap_in_hardware = 1;
> - return 0;
> -}
> -
> -static struct dmi_system_id __initdata pm_dmi_table[] = {
> - {
> - enable_cap_knobs, "IBM Active Energy Manager",
> - {
> - DMI_MATCH(DMI_SYS_VENDOR, "IBM")
> - },
> - },
> - {}
> -};
> -
> -static int __init acpi_power_meter_init(void)
> -{
> - int result;
> -
> - if (acpi_disabled)
> - return -ENODEV;
> -
> - dmi_check_system(pm_dmi_table);
> -
> - result = acpi_bus_register_driver(&acpi_power_meter_driver);
> - if (result < 0)
> - return -ENODEV;
> -
> - return 0;
> -}
> -
> -static void __exit acpi_power_meter_exit(void)
> -{
> - acpi_bus_unregister_driver(&acpi_power_meter_driver);
> -}
> -
> -MODULE_AUTHOR("Darrick J. Wong <djwong@xxxxxxxxxx>");
> -MODULE_DESCRIPTION("ACPI 4.0 power meter driver");
> -MODULE_LICENSE("GPL");
> -
> -module_param(force_cap_on, bool, 0644);
> -MODULE_PARM_DESC(force_cap_on, "Enable power cap even it is unsafe to do so.");
> -
> -module_init(acpi_power_meter_init);
> -module_exit(acpi_power_meter_exit);
> --- linux-2.6.39-rc5.orig/drivers/hwmon/Kconfig 2011-04-29 10:39:23.000000000 +0200
> +++ linux-2.6.39-rc5/drivers/hwmon/Kconfig 2011-04-29 18:07:51.000000000 +0200
> @@ -1299,6 +1299,16 @@ if ACPI
>
> comment "ACPI drivers"
>
> +config SENSORS_ACPI_POWER
> + tristate "ACPI 4.0 power meter"
> + help
> + This driver exposes ACPI 4.0 power meters as hardware monitoring
> + devices. Say Y (or M) if you have a computer with ACPI 4.0 firmware
> + and a power meter.
> +
> + To compile this driver as a module, choose M here:
> + the module will be called acpi_power_meter.
> +
> config SENSORS_ATK0110
> tristate "ASUS ATK0110"
> depends on X86 && EXPERIMENTAL
> --- linux-2.6.39-rc5.orig/drivers/hwmon/Makefile 2011-04-29 10:39:20.000000000 +0200
> +++ linux-2.6.39-rc5/drivers/hwmon/Makefile 2011-04-29 18:07:38.000000000 +0200
> @@ -6,6 +6,7 @@ obj-$(CONFIG_HWMON) += hwmon.o
> obj-$(CONFIG_HWMON_VID) += hwmon-vid.o
>
> # APCI drivers
> +obj-$(CONFIG_SENSORS_ACPI_POWER) += acpi_power_meter.o
> obj-$(CONFIG_SENSORS_ATK0110) += asus_atk0110.o
>
> # Native drivers
> --- /dev/null 1970-01-01 00:00:00.000000000 +0000
> +++ linux-2.6.39-rc5/drivers/hwmon/acpi_power_meter.c 2011-04-29 18:05:49.000000000 +0200
> @@ -0,0 +1,1023 @@
> +/*
> + * A hwmon driver for ACPI 4.0 power meters
> + * Copyright (C) 2009 IBM
> + *
> + * Author: Darrick J. Wong <djwong@xxxxxxxxxx>
> + *
> + * 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.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +#include <linux/module.h>
> +#include <linux/hwmon.h>
> +#include <linux/hwmon-sysfs.h>
> +#include <linux/jiffies.h>
> +#include <linux/mutex.h>
> +#include <linux/dmi.h>
> +#include <linux/slab.h>
> +#include <linux/kdev_t.h>
> +#include <linux/sched.h>
> +#include <linux/time.h>
> +#include <acpi/acpi_drivers.h>
> +#include <acpi/acpi_bus.h>
> +
> +#define ACPI_POWER_METER_NAME "power_meter"
> +ACPI_MODULE_NAME(ACPI_POWER_METER_NAME);
> +#define ACPI_POWER_METER_DEVICE_NAME "Power Meter"
> +#define ACPI_POWER_METER_CLASS "pwr_meter_resource"
> +
> +#define NUM_SENSORS 17
> +
> +#define POWER_METER_CAN_MEASURE (1 << 0)
> +#define POWER_METER_CAN_TRIP (1 << 1)
> +#define POWER_METER_CAN_CAP (1 << 2)
> +#define POWER_METER_CAN_NOTIFY (1 << 3)
> +#define POWER_METER_IS_BATTERY (1 << 8)
> +#define UNKNOWN_HYSTERESIS 0xFFFFFFFF
> +
> +#define METER_NOTIFY_CONFIG 0x80
> +#define METER_NOTIFY_TRIP 0x81
> +#define METER_NOTIFY_CAP 0x82
> +#define METER_NOTIFY_CAPPING 0x83
> +#define METER_NOTIFY_INTERVAL 0x84
> +
> +#define POWER_AVERAGE_NAME "power1_average"
> +#define POWER_CAP_NAME "power1_cap"
> +#define POWER_AVG_INTERVAL_NAME "power1_average_interval"
> +#define POWER_ALARM_NAME "power1_alarm"
> +
> +static int cap_in_hardware;
> +static int force_cap_on;
> +
> +static int can_cap_in_hardware(void)
> +{
> + return force_cap_on || cap_in_hardware;
> +}
> +
> +static const struct acpi_device_id power_meter_ids[] = {
> + {"ACPI000D", 0},
> + {"", 0},
> +};
> +MODULE_DEVICE_TABLE(acpi, power_meter_ids);
> +
> +struct acpi_power_meter_capabilities {
> + u64 flags;
> + u64 units;
> + u64 type;
> + u64 accuracy;
> + u64 sampling_time;
> + u64 min_avg_interval;
> + u64 max_avg_interval;
> + u64 hysteresis;
> + u64 configurable_cap;
> + u64 min_cap;
> + u64 max_cap;
> +};
> +
> +struct acpi_power_meter_resource {
> + struct acpi_device *acpi_dev;
> + acpi_bus_id name;
> + struct mutex lock;
> + struct device *hwmon_dev;
> + struct acpi_power_meter_capabilities caps;
> + acpi_string model_number;
> + acpi_string serial_number;
> + acpi_string oem_info;
> + u64 power;
> + u64 cap;
> + u64 avg_interval;
> + int sensors_valid;
> + unsigned long sensors_last_updated;
> + struct sensor_device_attribute sensors[NUM_SENSORS];
> + int num_sensors;
> + int trip[2];
> + int num_domain_devices;
> + struct acpi_device **domain_devices;
> + struct kobject *holders_dir;
> +};
> +
> +struct ro_sensor_template {
> + char *label;
> + ssize_t (*show)(struct device *dev,
> + struct device_attribute *devattr,
> + char *buf);
> + int index;
> +};
> +
> +struct rw_sensor_template {
> + char *label;
> + ssize_t (*show)(struct device *dev,
> + struct device_attribute *devattr,
> + char *buf);
> + ssize_t (*set)(struct device *dev,
> + struct device_attribute *devattr,
> + const char *buf, size_t count);
> + int index;
> +};
> +
> +/* Averaging interval */
> +static int update_avg_interval(struct acpi_power_meter_resource *resource)
> +{
> + unsigned long long data;
> + acpi_status status;
> +
> + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_GAI",
> + NULL, &data);
> + if (ACPI_FAILURE(status)) {
> + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _GAI"));
> + return -ENODEV;
> + }
> +
> + resource->avg_interval = data;
> + return 0;
> +}
> +
> +static ssize_t show_avg_interval(struct device *dev,
> + struct device_attribute *devattr,
> + char *buf)
> +{
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
> + struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> +
> + mutex_lock(&resource->lock);
> + update_avg_interval(resource);
> + mutex_unlock(&resource->lock);
> +
> + return sprintf(buf, "%llu\n", resource->avg_interval);
> +}
> +
> +static ssize_t set_avg_interval(struct device *dev,
> + struct device_attribute *devattr,
> + const char *buf, size_t count)
> +{
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
> + struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> + union acpi_object arg0 = { ACPI_TYPE_INTEGER };
> + struct acpi_object_list args = { 1, &arg0 };
> + int res;
> + unsigned long temp;
> + unsigned long long data;
> + acpi_status status;
> +
> + res = strict_strtoul(buf, 10, &temp);
> + if (res)
> + return res;
> +
> + if (temp > resource->caps.max_avg_interval ||
> + temp < resource->caps.min_avg_interval)
> + return -EINVAL;
> + arg0.integer.value = temp;
> +
> + mutex_lock(&resource->lock);
> + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PAI",
> + &args, &data);
> + if (!ACPI_FAILURE(status))
> + resource->avg_interval = temp;
> + mutex_unlock(&resource->lock);
> +
> + if (ACPI_FAILURE(status)) {
> + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PAI"));
> + return -EINVAL;
> + }
> +
> + /* _PAI returns 0 on success, nonzero otherwise */
> + if (data)
> + return -EINVAL;
> +
> + return count;
> +}
> +
> +/* Cap functions */
> +static int update_cap(struct acpi_power_meter_resource *resource)
> +{
> + unsigned long long data;
> + acpi_status status;
> +
> + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_GHL",
> + NULL, &data);
> + if (ACPI_FAILURE(status)) {
> + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _GHL"));
> + return -ENODEV;
> + }
> +
> + resource->cap = data;
> + return 0;
> +}
> +
> +static ssize_t show_cap(struct device *dev,
> + struct device_attribute *devattr,
> + char *buf)
> +{
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
> + struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> +
> + mutex_lock(&resource->lock);
> + update_cap(resource);
> + mutex_unlock(&resource->lock);
> +
> + return sprintf(buf, "%llu\n", resource->cap * 1000);
> +}
> +
> +static ssize_t set_cap(struct device *dev, struct device_attribute *devattr,
> + const char *buf, size_t count)
> +{
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
> + struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> + union acpi_object arg0 = { ACPI_TYPE_INTEGER };
> + struct acpi_object_list args = { 1, &arg0 };
> + int res;
> + unsigned long temp;
> + unsigned long long data;
> + acpi_status status;
> +
> + res = strict_strtoul(buf, 10, &temp);
> + if (res)
> + return res;
> +
> + temp /= 1000;
> + if (temp > resource->caps.max_cap || temp < resource->caps.min_cap)
> + return -EINVAL;
> + arg0.integer.value = temp;
> +
> + mutex_lock(&resource->lock);
> + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_SHL",
> + &args, &data);
> + if (!ACPI_FAILURE(status))
> + resource->cap = temp;
> + mutex_unlock(&resource->lock);
> +
> + if (ACPI_FAILURE(status)) {
> + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SHL"));
> + return -EINVAL;
> + }
> +
> + /* _SHL returns 0 on success, nonzero otherwise */
> + if (data)
> + return -EINVAL;
> +
> + return count;
> +}
> +
> +/* Power meter trip points */
> +static int set_acpi_trip(struct acpi_power_meter_resource *resource)
> +{
> + union acpi_object arg_objs[] = {
> + {ACPI_TYPE_INTEGER},
> + {ACPI_TYPE_INTEGER}
> + };
> + struct acpi_object_list args = { 2, arg_objs };
> + unsigned long long data;
> + acpi_status status;
> +
> + /* Both trip levels must be set */
> + if (resource->trip[0] < 0 || resource->trip[1] < 0)
> + return 0;
> +
> + /* This driver stores min, max; ACPI wants max, min. */
> + arg_objs[0].integer.value = resource->trip[1];
> + arg_objs[1].integer.value = resource->trip[0];
> +
> + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PTP",
> + &args, &data);
> + if (ACPI_FAILURE(status)) {
> + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTP"));
> + return -EINVAL;
> + }
> +
> + /* _PTP returns 0 on success, nonzero otherwise */
> + if (data)
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +static ssize_t set_trip(struct device *dev, struct device_attribute *devattr,
> + const char *buf, size_t count)
> +{
> + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
> + struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> + int res;
> + unsigned long temp;
> +
> + res = strict_strtoul(buf, 10, &temp);
> + if (res)
> + return res;
> +
> + temp /= 1000;
> + if (temp < 0)
> + return -EINVAL;
> +
> + mutex_lock(&resource->lock);
> + resource->trip[attr->index - 7] = temp;
> + res = set_acpi_trip(resource);
> + mutex_unlock(&resource->lock);
> +
> + if (res)
> + return res;
> +
> + return count;
> +}
> +
> +/* Power meter */
> +static int update_meter(struct acpi_power_meter_resource *resource)
> +{
> + unsigned long long data;
> + acpi_status status;
> + unsigned long local_jiffies = jiffies;
> +
> + if (time_before(local_jiffies, resource->sensors_last_updated +
> + msecs_to_jiffies(resource->caps.sampling_time)) &&
> + resource->sensors_valid)
> + return 0;
> +
> + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PMM",
> + NULL, &data);
> + if (ACPI_FAILURE(status)) {
> + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMM"));
> + return -ENODEV;
> + }
> +
> + resource->power = data;
> + resource->sensors_valid = 1;
> + resource->sensors_last_updated = jiffies;
> + return 0;
> +}
> +
> +static ssize_t show_power(struct device *dev,
> + struct device_attribute *devattr,
> + char *buf)
> +{
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
> + struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> +
> + mutex_lock(&resource->lock);
> + update_meter(resource);
> + mutex_unlock(&resource->lock);
> +
> + return sprintf(buf, "%llu\n", resource->power * 1000);
> +}
> +
> +/* Miscellaneous */
> +static ssize_t show_str(struct device *dev,
> + struct device_attribute *devattr,
> + char *buf)
> +{
> + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
> + struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> + acpi_string val;
> +
> + switch (attr->index) {
> + case 0:
> + val = resource->model_number;
> + break;
> + case 1:
> + val = resource->serial_number;
> + break;
> + case 2:
> + val = resource->oem_info;
> + break;
> + default:
> + BUG();
> + }
> +
> + return sprintf(buf, "%s\n", val);
> +}
> +
> +static ssize_t show_val(struct device *dev,
> + struct device_attribute *devattr,
> + char *buf)
> +{
> + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
> + struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> + u64 val = 0;
> +
> + switch (attr->index) {
> + case 0:
> + val = resource->caps.min_avg_interval;
> + break;
> + case 1:
> + val = resource->caps.max_avg_interval;
> + break;
> + case 2:
> + val = resource->caps.min_cap * 1000;
> + break;
> + case 3:
> + val = resource->caps.max_cap * 1000;
> + break;
> + case 4:
> + if (resource->caps.hysteresis == UNKNOWN_HYSTERESIS)
> + return sprintf(buf, "unknown\n");
> +
> + val = resource->caps.hysteresis * 1000;
> + break;
> + case 5:
> + if (resource->caps.flags & POWER_METER_IS_BATTERY)
> + val = 1;
> + else
> + val = 0;
> + break;
> + case 6:
> + if (resource->power > resource->cap)
> + val = 1;
> + else
> + val = 0;
> + break;
> + case 7:
> + case 8:
> + if (resource->trip[attr->index - 7] < 0)
> + return sprintf(buf, "unknown\n");
> +
> + val = resource->trip[attr->index - 7] * 1000;
> + break;
> + default:
> + BUG();
> + }
> +
> + return sprintf(buf, "%llu\n", val);
> +}
> +
> +static ssize_t show_accuracy(struct device *dev,
> + struct device_attribute *devattr,
> + char *buf)
> +{
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
> + struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
> + unsigned int acc = resource->caps.accuracy;
> +
> + return sprintf(buf, "%u.%u%%\n", acc / 1000, acc % 1000);
> +}
> +
> +static ssize_t show_name(struct device *dev,
> + struct device_attribute *devattr,
> + char *buf)
> +{
> + return sprintf(buf, "%s\n", ACPI_POWER_METER_NAME);
> +}
> +
> +/* Sensor descriptions. If you add a sensor, update NUM_SENSORS above! */
> +static struct ro_sensor_template meter_ro_attrs[] = {
> +{POWER_AVERAGE_NAME, show_power, 0},
> +{"power1_accuracy", show_accuracy, 0},
> +{"power1_average_interval_min", show_val, 0},
> +{"power1_average_interval_max", show_val, 1},
> +{"power1_is_battery", show_val, 5},
> +{NULL, NULL, 0},
> +};
> +
> +static struct rw_sensor_template meter_rw_attrs[] = {
> +{POWER_AVG_INTERVAL_NAME, show_avg_interval, set_avg_interval, 0},
> +{NULL, NULL, NULL, 0},
> +};
> +
> +static struct ro_sensor_template misc_cap_attrs[] = {
> +{"power1_cap_min", show_val, 2},
> +{"power1_cap_max", show_val, 3},
> +{"power1_cap_hyst", show_val, 4},
> +{POWER_ALARM_NAME, show_val, 6},
> +{NULL, NULL, 0},
> +};
> +
> +static struct ro_sensor_template ro_cap_attrs[] = {
> +{POWER_CAP_NAME, show_cap, 0},
> +{NULL, NULL, 0},
> +};
> +
> +static struct rw_sensor_template rw_cap_attrs[] = {
> +{POWER_CAP_NAME, show_cap, set_cap, 0},
> +{NULL, NULL, NULL, 0},
> +};
> +
> +static struct rw_sensor_template trip_attrs[] = {
> +{"power1_average_min", show_val, set_trip, 7},
> +{"power1_average_max", show_val, set_trip, 8},
> +{NULL, NULL, NULL, 0},
> +};
> +
> +static struct ro_sensor_template misc_attrs[] = {
> +{"name", show_name, 0},
> +{"power1_model_number", show_str, 0},
> +{"power1_oem_info", show_str, 2},
> +{"power1_serial_number", show_str, 1},
> +{NULL, NULL, 0},
> +};
> +
> +/* Read power domain data */
> +static void remove_domain_devices(struct acpi_power_meter_resource *resource)
> +{
> + int i;
> +
> + if (!resource->num_domain_devices)
> + return;
> +
> + for (i = 0; i < resource->num_domain_devices; i++) {
> + struct acpi_device *obj = resource->domain_devices[i];
> + if (!obj)
> + continue;
> +
> + sysfs_remove_link(resource->holders_dir,
> + kobject_name(&obj->dev.kobj));
> + put_device(&obj->dev);
> + }
> +
> + kfree(resource->domain_devices);
> + kobject_put(resource->holders_dir);
> + resource->num_domain_devices = 0;
> +}
> +
> +static int read_domain_devices(struct acpi_power_meter_resource *resource)
> +{
> + int res = 0;
> + int i;
> + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
> + union acpi_object *pss;
> + acpi_status status;
> +
> + status = acpi_evaluate_object(resource->acpi_dev->handle, "_PMD", NULL,
> + &buffer);
> + if (ACPI_FAILURE(status)) {
> + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMD"));
> + return -ENODEV;
> + }
> +
> + pss = buffer.pointer;
> + if (!pss ||
> + pss->type != ACPI_TYPE_PACKAGE) {
> + dev_err(&resource->acpi_dev->dev, ACPI_POWER_METER_NAME
> + "Invalid _PMD data\n");
> + res = -EFAULT;
> + goto end;
> + }
> +
> + if (!pss->package.count)
> + goto end;
> +
> + resource->domain_devices = kzalloc(sizeof(struct acpi_device *) *
> + pss->package.count, GFP_KERNEL);
> + if (!resource->domain_devices) {
> + res = -ENOMEM;
> + goto end;
> + }
> +
> + resource->holders_dir = kobject_create_and_add("measures",
> + &resource->acpi_dev->dev.kobj);
> + if (!resource->holders_dir) {
> + res = -ENOMEM;
> + goto exit_free;
> + }
> +
> + resource->num_domain_devices = pss->package.count;
> +
> + for (i = 0; i < pss->package.count; i++) {
> + struct acpi_device *obj;
> + union acpi_object *element = &(pss->package.elements[i]);
> +
> + /* Refuse non-references */
> + if (element->type != ACPI_TYPE_LOCAL_REFERENCE)
> + continue;
> +
> + /* Create a symlink to domain objects */
> + resource->domain_devices[i] = NULL;
> + status = acpi_bus_get_device(element->reference.handle,
> + &resource->domain_devices[i]);
> + if (ACPI_FAILURE(status))
> + continue;
> +
> + obj = resource->domain_devices[i];
> + get_device(&obj->dev);
> +
> + res = sysfs_create_link(resource->holders_dir, &obj->dev.kobj,
> + kobject_name(&obj->dev.kobj));
> + if (res) {
> + put_device(&obj->dev);
> + resource->domain_devices[i] = NULL;
> + }
> + }
> +
> + res = 0;
> + goto end;
> +
> +exit_free:
> + kfree(resource->domain_devices);
> +end:
> + kfree(buffer.pointer);
> + return res;
> +}
> +
> +/* Registration and deregistration */
> +static int register_ro_attrs(struct acpi_power_meter_resource *resource,
> + struct ro_sensor_template *ro)
> +{
> + struct device *dev = &resource->acpi_dev->dev;
> + struct sensor_device_attribute *sensors =
> + &resource->sensors[resource->num_sensors];
> + int res = 0;
> +
> + while (ro->label) {
> + sensors->dev_attr.attr.name = ro->label;
> + sensors->dev_attr.attr.mode = S_IRUGO;
> + sensors->dev_attr.show = ro->show;
> + sensors->index = ro->index;
> +
> + res = device_create_file(dev, &sensors->dev_attr);
> + if (res) {
> + sensors->dev_attr.attr.name = NULL;
> + goto error;
> + }
> + sensors++;
> + resource->num_sensors++;
> + ro++;
> + }
> +
> +error:
> + return res;
> +}
> +
> +static int register_rw_attrs(struct acpi_power_meter_resource *resource,
> + struct rw_sensor_template *rw)
> +{
> + struct device *dev = &resource->acpi_dev->dev;
> + struct sensor_device_attribute *sensors =
> + &resource->sensors[resource->num_sensors];
> + int res = 0;
> +
> + while (rw->label) {
> + sensors->dev_attr.attr.name = rw->label;
> + sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR;
> + sensors->dev_attr.show = rw->show;
> + sensors->dev_attr.store = rw->set;
> + sensors->index = rw->index;
> +
> + res = device_create_file(dev, &sensors->dev_attr);
> + if (res) {
> + sensors->dev_attr.attr.name = NULL;
> + goto error;
> + }
> + sensors++;
> + resource->num_sensors++;
> + rw++;
> + }
> +
> +error:
> + return res;
> +}
> +
> +static void remove_attrs(struct acpi_power_meter_resource *resource)
> +{
> + int i;
> +
> + for (i = 0; i < resource->num_sensors; i++) {
> + if (!resource->sensors[i].dev_attr.attr.name)
> + continue;
> + device_remove_file(&resource->acpi_dev->dev,
> + &resource->sensors[i].dev_attr);
> + }
> +
> + remove_domain_devices(resource);
> +
> + resource->num_sensors = 0;
> +}
> +
> +static int setup_attrs(struct acpi_power_meter_resource *resource)
> +{
> + int res = 0;
> +
> + res = read_domain_devices(resource);
> + if (res)
> + return res;
> +
> + if (resource->caps.flags & POWER_METER_CAN_MEASURE) {
> + res = register_ro_attrs(resource, meter_ro_attrs);
> + if (res)
> + goto error;
> + res = register_rw_attrs(resource, meter_rw_attrs);
> + if (res)
> + goto error;
> + }
> +
> + if (resource->caps.flags & POWER_METER_CAN_CAP) {
> + if (!can_cap_in_hardware()) {
> + dev_err(&resource->acpi_dev->dev,
> + "Ignoring unsafe software power cap!\n");
> + goto skip_unsafe_cap;
> + }
> +
> + if (resource->caps.configurable_cap) {
> + res = register_rw_attrs(resource, rw_cap_attrs);
> + if (res)
> + goto error;
> + } else {
> + res = register_ro_attrs(resource, ro_cap_attrs);
> + if (res)
> + goto error;
> + }
> + res = register_ro_attrs(resource, misc_cap_attrs);
> + if (res)
> + goto error;
> + }
> +skip_unsafe_cap:
> +
> + if (resource->caps.flags & POWER_METER_CAN_TRIP) {
> + res = register_rw_attrs(resource, trip_attrs);
> + if (res)
> + goto error;
> + }
> +
> + res = register_ro_attrs(resource, misc_attrs);
> + if (res)
> + goto error;
> +
> + return res;
> +error:
> + remove_attrs(resource);
> + return res;
> +}
> +
> +static void free_capabilities(struct acpi_power_meter_resource *resource)
> +{
> + acpi_string *str;
> + int i;
> +
> + str = &resource->model_number;
> + for (i = 0; i < 3; i++, str++)
> + kfree(*str);
> +}
> +
> +static int read_capabilities(struct acpi_power_meter_resource *resource)
> +{
> + int res = 0;
> + int i;
> + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
> + struct acpi_buffer state = { 0, NULL };
> + struct acpi_buffer format = { sizeof("NNNNNNNNNNN"), "NNNNNNNNNNN" };
> + union acpi_object *pss;
> + acpi_string *str;
> + acpi_status status;
> +
> + status = acpi_evaluate_object(resource->acpi_dev->handle, "_PMC", NULL,
> + &buffer);
> + if (ACPI_FAILURE(status)) {
> + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMC"));
> + return -ENODEV;
> + }
> +
> + pss = buffer.pointer;
> + if (!pss ||
> + pss->type != ACPI_TYPE_PACKAGE ||
> + pss->package.count != 14) {
> + dev_err(&resource->acpi_dev->dev, ACPI_POWER_METER_NAME
> + "Invalid _PMC data\n");
> + res = -EFAULT;
> + goto end;
> + }
> +
> + /* Grab all the integer data at once */
> + state.length = sizeof(struct acpi_power_meter_capabilities);
> + state.pointer = &resource->caps;
> +
> + status = acpi_extract_package(pss, &format, &state);
> + if (ACPI_FAILURE(status)) {
> + ACPI_EXCEPTION((AE_INFO, status, "Invalid data"));
> + res = -EFAULT;
> + goto end;
> + }
> +
> + if (resource->caps.units) {
> + dev_err(&resource->acpi_dev->dev, ACPI_POWER_METER_NAME
> + "Unknown units %llu.\n",
> + resource->caps.units);
> + res = -EINVAL;
> + goto end;
> + }
> +
> + /* Grab the string data */
> + str = &resource->model_number;
> +
> + for (i = 11; i < 14; i++) {
> + union acpi_object *element = &(pss->package.elements[i]);
> +
> + if (element->type != ACPI_TYPE_STRING) {
> + res = -EINVAL;
> + goto error;
> + }
> +
> + *str = kzalloc(sizeof(u8) * (element->string.length + 1),
> + GFP_KERNEL);
> + if (!*str) {
> + res = -ENOMEM;
> + goto error;
> + }
> +
> + strncpy(*str, element->string.pointer, element->string.length);
> + str++;
> + }
> +
> + dev_info(&resource->acpi_dev->dev, "Found ACPI power meter.\n");
> + goto end;
> +error:
> + str = &resource->model_number;
> + for (i = 0; i < 3; i++, str++)
> + kfree(*str);
> +end:
> + kfree(buffer.pointer);
> + return res;
> +}
> +
> +/* Handle ACPI event notifications */
> +static void acpi_power_meter_notify(struct acpi_device *device, u32 event)
> +{
> + struct acpi_power_meter_resource *resource;
> + int res;
> +
> + if (!device || !acpi_driver_data(device))
> + return;
> +
> + resource = acpi_driver_data(device);
> +
> + mutex_lock(&resource->lock);
> + switch (event) {
> + case METER_NOTIFY_CONFIG:
> + free_capabilities(resource);
> + res = read_capabilities(resource);
> + if (res)
> + break;
> +
> + remove_attrs(resource);
> + setup_attrs(resource);
> + break;
> + case METER_NOTIFY_TRIP:
> + sysfs_notify(&device->dev.kobj, NULL, POWER_AVERAGE_NAME);
> + update_meter(resource);
> + break;
> + case METER_NOTIFY_CAP:
> + sysfs_notify(&device->dev.kobj, NULL, POWER_CAP_NAME);
> + update_cap(resource);
> + break;
> + case METER_NOTIFY_INTERVAL:
> + sysfs_notify(&device->dev.kobj, NULL, POWER_AVG_INTERVAL_NAME);
> + update_avg_interval(resource);
> + break;
> + case METER_NOTIFY_CAPPING:
> + sysfs_notify(&device->dev.kobj, NULL, POWER_ALARM_NAME);
> + dev_info(&device->dev, "Capping in progress.\n");
> + break;
> + default:
> + BUG();
> + }
> + mutex_unlock(&resource->lock);
> +
> + acpi_bus_generate_netlink_event(ACPI_POWER_METER_CLASS,
> + dev_name(&device->dev), event, 0);
> +}
> +
> +static int acpi_power_meter_add(struct acpi_device *device)
> +{
> + int res;
> + struct acpi_power_meter_resource *resource;
> +
> + if (!device)
> + return -EINVAL;
> +
> + resource = kzalloc(sizeof(struct acpi_power_meter_resource),
> + GFP_KERNEL);
> + if (!resource)
> + return -ENOMEM;
> +
> + resource->sensors_valid = 0;
> + resource->acpi_dev = device;
> + mutex_init(&resource->lock);
> + strcpy(acpi_device_name(device), ACPI_POWER_METER_DEVICE_NAME);
> + strcpy(acpi_device_class(device), ACPI_POWER_METER_CLASS);
> + device->driver_data = resource;
> +
> + free_capabilities(resource);
> + res = read_capabilities(resource);
> + if (res)
> + goto exit_free;
> +
> + resource->trip[0] = resource->trip[1] = -1;
> +
> + res = setup_attrs(resource);
> + if (res)
> + goto exit_free;
> +
> + resource->hwmon_dev = hwmon_device_register(&device->dev);
> + if (IS_ERR(resource->hwmon_dev)) {
> + res = PTR_ERR(resource->hwmon_dev);
> + goto exit_remove;
> + }
> +
> + res = 0;
> + goto exit;
> +
> +exit_remove:
> + remove_attrs(resource);
> +exit_free:
> + kfree(resource);
> +exit:
> + return res;
> +}
> +
> +static int acpi_power_meter_remove(struct acpi_device *device, int type)
> +{
> + struct acpi_power_meter_resource *resource;
> +
> + if (!device || !acpi_driver_data(device))
> + return -EINVAL;
> +
> + resource = acpi_driver_data(device);
> + hwmon_device_unregister(resource->hwmon_dev);
> +
> + free_capabilities(resource);
> + remove_attrs(resource);
> +
> + kfree(resource);
> + return 0;
> +}
> +
> +static int acpi_power_meter_resume(struct acpi_device *device)
> +{
> + struct acpi_power_meter_resource *resource;
> +
> + if (!device || !acpi_driver_data(device))
> + return -EINVAL;
> +
> + resource = acpi_driver_data(device);
> + free_capabilities(resource);
> + read_capabilities(resource);
> +
> + return 0;
> +}
> +
> +static struct acpi_driver acpi_power_meter_driver = {
> + .name = "power_meter",
> + .class = ACPI_POWER_METER_CLASS,
> + .ids = power_meter_ids,
> + .ops = {
> + .add = acpi_power_meter_add,
> + .remove = acpi_power_meter_remove,
> + .resume = acpi_power_meter_resume,
> + .notify = acpi_power_meter_notify,
> + },
> +};
> +
> +/* Module init/exit routines */
> +static int __init enable_cap_knobs(const struct dmi_system_id *d)
> +{
> + cap_in_hardware = 1;
> + return 0;
> +}
> +
> +static struct dmi_system_id __initdata pm_dmi_table[] = {
> + {
> + enable_cap_knobs, "IBM Active Energy Manager",
> + {
> + DMI_MATCH(DMI_SYS_VENDOR, "IBM")
> + },
> + },
> + {}
> +};
> +
> +static int __init acpi_power_meter_init(void)
> +{
> + int result;
> +
> + if (acpi_disabled)
> + return -ENODEV;
> +
> + dmi_check_system(pm_dmi_table);
> +
> + result = acpi_bus_register_driver(&acpi_power_meter_driver);
> + if (result < 0)
> + return -ENODEV;
> +
> + return 0;
> +}
> +
> +static void __exit acpi_power_meter_exit(void)
> +{
> + acpi_bus_unregister_driver(&acpi_power_meter_driver);
> +}
> +
> +MODULE_AUTHOR("Darrick J. Wong <djwong@xxxxxxxxxx>");
> +MODULE_DESCRIPTION("ACPI 4.0 power meter driver");
> +MODULE_LICENSE("GPL");
> +
> +module_param(force_cap_on, bool, 0644);
> +MODULE_PARM_DESC(force_cap_on, "Enable power cap even it is unsafe to do so.");
> +
> +module_init(acpi_power_meter_init);
> +module_exit(acpi_power_meter_exit);
>
>
> --
> Jean Delvare
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