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Diffstat (limited to 'drivers/acpi/battery.c')
-rw-r--r--drivers/acpi/battery.c63
1 files changed, 34 insertions, 29 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index b822f77afba6..dae91f906cea 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -74,16 +74,17 @@ enum {
ACPI_BATTERY_XINFO_PRESENT,
ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
/* On Lenovo Thinkpad models from 2010 and 2011, the power unit
- switches between mWh and mAh depending on whether the system
- is running on battery or not. When mAh is the unit, most
- reported values are incorrect and need to be adjusted by
- 10000/design_voltage. Verified on x201, t410, t410s, and x220.
- Pre-2010 and 2012 models appear to always report in mWh and
- are thus unaffected (tested with t42, t61, t500, x200, x300,
- and x230). Also, in mid-2012 Lenovo issued a BIOS update for
- the 2011 models that fixes the issue (tested on x220 with a
- post-1.29 BIOS), but as of Nov. 2012, no such update is
- available for the 2010 models. */
+ * switches between mWh and mAh depending on whether the system
+ * is running on battery or not. When mAh is the unit, most
+ * reported values are incorrect and need to be adjusted by
+ * 10000/design_voltage. Verified on x201, t410, t410s, and x220.
+ * Pre-2010 and 2012 models appear to always report in mWh and
+ * are thus unaffected (tested with t42, t61, t500, x200, x300,
+ * and x230). Also, in mid-2012 Lenovo issued a BIOS update for
+ * the 2011 models that fixes the issue (tested on x220 with a
+ * post-1.29 BIOS), but as of Nov. 2012, no such update is
+ * available for the 2010 models.
+ */
ACPI_BATTERY_QUIRK_THINKPAD_MAH,
/* for batteries reporting current capacity with design capacity
* on a full charge, but showing degradation in full charge cap.
@@ -371,9 +372,7 @@ static enum power_supply_property energy_battery_full_cap_broken_props[] = {
POWER_SUPPLY_PROP_SERIAL_NUMBER,
};
-/* --------------------------------------------------------------------------
- Battery Management
- -------------------------------------------------------------------------- */
+/* Battery Management */
struct acpi_offsets {
size_t offset; /* offset inside struct acpi_sbs_battery */
u8 mode; /* int or string? */
@@ -431,6 +430,7 @@ static int extract_package(struct acpi_battery *battery,
{
int i;
union acpi_object *element;
+
if (package->type != ACPI_TYPE_PACKAGE)
return -EFAULT;
for (i = 0; i < num; ++i) {
@@ -439,6 +439,7 @@ static int extract_package(struct acpi_battery *battery,
element = &package->package.elements[i];
if (offsets[i].mode) {
u8 *ptr = (u8 *)battery + offsets[i].offset;
+
if (element->type == ACPI_TYPE_STRING ||
element->type == ACPI_TYPE_BUFFER)
strncpy(ptr, element->string.pointer, 32);
@@ -497,10 +498,12 @@ static int extract_battery_info(const int use_bix,
battery->design_capacity_warning *
10000 / battery->design_voltage;
/* Curiously, design_capacity_low, unlike the rest of them,
- is correct. */
+ * is correct.
+ */
/* capacity_granularity_* equal 1 on the systems tested, so
- it's impossible to tell if they would need an adjustment
- or not if their values were higher. */
+ * it's impossible to tell if they would need an adjustment
+ * or not if their values were higher.
+ */
}
if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) &&
battery->capacity_now > battery->full_charge_capacity)
@@ -532,8 +535,8 @@ static int acpi_battery_get_info(struct acpi_battery *battery)
if (ACPI_FAILURE(status)) {
acpi_handle_info(battery->device->handle,
"%s evaluation failed: %s\n",
- use_bix ?"_BIX":"_BIF",
- acpi_format_exception(status));
+ use_bix ? "_BIX":"_BIF",
+ acpi_format_exception(status));
} else {
result = extract_battery_info(use_bix,
battery,
@@ -648,6 +651,7 @@ static ssize_t acpi_battery_alarm_show(struct device *dev,
char *buf)
{
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
+
return sprintf(buf, "%d\n", battery->alarm * 1000);
}
@@ -657,6 +661,7 @@ static ssize_t acpi_battery_alarm_store(struct device *dev,
{
unsigned long x;
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
+
if (sscanf(buf, "%lu\n", &x) == 1)
battery->alarm = x/1000;
if (acpi_battery_present(battery))
@@ -743,7 +748,7 @@ EXPORT_SYMBOL_GPL(battery_hook_register);
* This function gets called right after the battery sysfs
* attributes have been added, so that the drivers that
* define custom sysfs attributes can add their own.
-*/
+ */
static void battery_hook_add_battery(struct acpi_battery *battery)
{
struct acpi_battery_hook *hook_node, *tmp;
@@ -872,10 +877,12 @@ static void find_battery(const struct dmi_header *dm, void *private)
{
struct acpi_battery *battery = (struct acpi_battery *)private;
/* Note: the hardcoded offsets below have been extracted from
- the source code of dmidecode. */
+ * the source code of dmidecode.
+ */
if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) {
const u8 *dmi_data = (const u8 *)(dm + 1);
int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6));
+
if (dm->length >= 18)
dmi_capacity *= dmi_data[17];
if (battery->design_capacity * battery->design_voltage / 1000
@@ -917,6 +924,7 @@ static void acpi_battery_quirks(struct acpi_battery *battery)
if (battery->power_unit && dmi_name_in_vendors("LENOVO")) {
const char *s;
+
s = dmi_get_system_info(DMI_PRODUCT_VERSION);
if (s && !strncasecmp(s, "ThinkPad", 8)) {
dmi_walk(find_battery, battery);
@@ -1013,10 +1021,7 @@ static void acpi_battery_refresh(struct acpi_battery *battery)
sysfs_add_battery(battery);
}
-/* --------------------------------------------------------------------------
- Driver Interface
- -------------------------------------------------------------------------- */
-
+/* Driver Interface */
static void acpi_battery_notify(struct acpi_device *device, u32 event)
{
struct acpi_battery *battery = acpi_driver_data(device);
@@ -1026,11 +1031,11 @@ static void acpi_battery_notify(struct acpi_device *device, u32 event)
return;
old = battery->bat;
/*
- * On Acer Aspire V5-573G notifications are sometimes triggered too
- * early. For example, when AC is unplugged and notification is
- * triggered, battery state is still reported as "Full", and changes to
- * "Discharging" only after short delay, without any notification.
- */
+ * On Acer Aspire V5-573G notifications are sometimes triggered too
+ * early. For example, when AC is unplugged and notification is
+ * triggered, battery state is still reported as "Full", and changes to
+ * "Discharging" only after short delay, without any notification.
+ */
if (battery_notification_delay_ms > 0)
msleep(battery_notification_delay_ms);
if (event == ACPI_BATTERY_NOTIFY_INFO)
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-27 02:00:48 +0300