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ACPI: thinkpad-acpi: do not use named sysfs groups 

The initial version of the thinkpad-acpi sysfs interface (not yet released
in any stable mainline kernel) made liberal use of named sysfs groups, in
order to get the attributes more organized.

This proved to be a really bad design decision.  Maybe if attribute groups
were as flexible as a real directory, and if binary attributes were not
second-class citizens, the idea of subdirs and named groups would not have
been so bad.

This patch makes all the thinkpad-acpi sysfs groups anonymous (thus
removing the subdirs), adds the former group names as a prefix (so that
hotkey/enable becomes hotkey_enable for example), and updates the
documentation.

These changes will make the thinkpad-acpi sysfs ABI a lot easier to
maintain.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Henrique de Moraes Holschuh 2007-05-30 20:50:14 -03:00 committed by Len Brown
parent 68ccfaa822
commit cc4c24e115
3 changed files with 18 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
Documentation/thinkpad-acpi.txt
View File

@ -138,7 +138,7 @@ Hot keys
--------
procfs: /proc/acpi/ibm/hotkey
sysfs device attribute: hotkey/*
sysfs device attribute: hotkey_*
Without this driver, only the Fn-F4 key (sleep button) generates an
ACPI event. With the driver loaded, the hotkey feature enabled and the
@ -196,10 +196,7 @@ The following commands can be written to the /proc/acpi/ibm/hotkey file:
sysfs notes:
The hot keys attributes are in a hotkey/ subdirectory off the
thinkpad device.
bios_enabled:
hotkey_bios_enabled:
Returns the status of the hot keys feature when
thinkpad-acpi was loaded. Upon module unload, the hot
key feature status will be restored to this value.
@ -207,19 +204,19 @@ sysfs notes:
0: hot keys were disabled
1: hot keys were enabled
bios_mask:
hotkey_bios_mask:
Returns the hot keys mask when thinkpad-acpi was loaded.
Upon module unload, the hot keys mask will be restored
to this value.
enable:
hotkey_enable:
Enables/disables the hot keys feature, and reports
current status of the hot keys feature.
0: disables the hot keys feature / feature disabled
1: enables the hot keys feature / feature enabled
mask:
hotkey_mask:
bit mask to enable ACPI event generation for each hot
key (see above). Returns the current status of the hot
keys mask, and allows one to modify it.
@ -229,7 +226,7 @@ Bluetooth
---------
procfs: /proc/acpi/ibm/bluetooth
sysfs device attribute: bluetooth/enable
sysfs device attribute: bluetooth_enable
This feature shows the presence and current state of a ThinkPad
Bluetooth device in the internal ThinkPad CDC slot.
@ -244,7 +241,7 @@ If Bluetooth is installed, the following commands can be used:
Sysfs notes:
If the Bluetooth CDC card is installed, it can be enabled /
disabled through the "bluetooth/enable" thinkpad-acpi device
disabled through the "bluetooth_enable" thinkpad-acpi device
attribute, and its current status can also be queried.
enable:
@ -252,7 +249,7 @@ Sysfs notes:
1: enables Bluetooth / Bluetooth is enabled.
Note: this interface will be probably be superseeded by the
generic rfkill class.
generic rfkill class, so it is NOT to be considered stable yet.
Video output control -- /proc/acpi/ibm/video
--------------------------------------------
@ -898,7 +895,7 @@ EXPERIMENTAL: WAN
-----------------
procfs: /proc/acpi/ibm/wan
sysfs device attribute: wwan/enable
sysfs device attribute: wwan_enable
This feature is marked EXPERIMENTAL because the implementation
directly accesses hardware registers and may not work as expected. USE
@ -921,7 +918,7 @@ If the W-WAN card is installed, the following commands can be used:
Sysfs notes:
If the W-WAN card is installed, it can be enabled /
disabled through the "wwan/enable" thinkpad-acpi device
disabled through the "wwan_enable" thinkpad-acpi device
attribute, and its current status can also be queried.
enable:
@ -929,7 +926,7 @@ Sysfs notes:
1: enables WWAN card / WWAN card is enabled.
Note: this interface will be probably be superseeded by the
generic rfkill class.
generic rfkill class, so it is NOT to be considered stable yet.
Multiple Commands, Module Parameters
------------------------------------

17
drivers/misc/thinkpad_acpi.c
View File

@ -740,7 +740,7 @@ static ssize_t hotkey_enable_store(struct device *dev,
}
static struct device_attribute dev_attr_hotkey_enable =
__ATTR(enable, S_IWUSR | S_IRUGO,
__ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
hotkey_enable_show, hotkey_enable_store);
/* sysfs hotkey mask --------------------------------------------------- */
@ -775,7 +775,7 @@ static ssize_t hotkey_mask_store(struct device *dev,
}
static struct device_attribute dev_attr_hotkey_mask =
__ATTR(mask, S_IWUSR | S_IRUGO,
__ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
hotkey_mask_show, hotkey_mask_store);
/* sysfs hotkey bios_enabled ------------------------------------------- */
@ -787,7 +787,7 @@ static ssize_t hotkey_bios_enabled_show(struct device *dev,
}
static struct device_attribute dev_attr_hotkey_bios_enabled =
__ATTR(bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
__ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
/* sysfs hotkey bios_mask ---------------------------------------------- */
static ssize_t hotkey_bios_mask_show(struct device *dev,
@ -798,7 +798,7 @@ static ssize_t hotkey_bios_mask_show(struct device *dev,
}
static struct device_attribute dev_attr_hotkey_bios_mask =
__ATTR(bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
__ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
/* --------------------------------------------------------------------- */
@ -824,8 +824,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
str_supported(tp_features.hotkey));
if (tp_features.hotkey) {
hotkey_dev_attributes = create_attr_set(4,
TPACPI_HOTKEY_SYSFS_GROUP);
hotkey_dev_attributes = create_attr_set(4, NULL);
if (!hotkey_dev_attributes)
return -ENOMEM;
res = add_to_attr_set(hotkey_dev_attributes,
@ -1050,7 +1049,7 @@ static ssize_t bluetooth_enable_store(struct device *dev,
}
static struct device_attribute dev_attr_bluetooth_enable =
__ATTR(enable, S_IWUSR | S_IRUGO,
__ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
bluetooth_enable_show, bluetooth_enable_store);
/* --------------------------------------------------------------------- */
@ -1061,7 +1060,6 @@ static struct attribute *bluetooth_attributes[] = {
};
static const struct attribute_group bluetooth_attr_group = {
.name = TPACPI_BLUETH_SYSFS_GROUP,
.attrs = bluetooth_attributes,
};
@ -1215,7 +1213,7 @@ static ssize_t wan_enable_store(struct device *dev,
}
static struct device_attribute dev_attr_wan_enable =
__ATTR(enable, S_IWUSR | S_IRUGO,
__ATTR(wwan_enable, S_IWUSR | S_IRUGO,
wan_enable_show, wan_enable_store);
/* --------------------------------------------------------------------- */
@ -1226,7 +1224,6 @@ static struct attribute *wan_attributes[] = {
};
static const struct attribute_group wan_attr_group = {
.name = TPACPI_WAN_SYSFS_GROUP,
.attrs = wan_attributes,
};

6
drivers/misc/thinkpad_acpi.h
View File

@ -278,8 +278,6 @@ static int beep_write(char *buf);
* Bluetooth subdriver
*/
#define TPACPI_BLUETH_SYSFS_GROUP "bluetooth"
enum {
/* ACPI GBDC/SBDC bits */
TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
@ -416,8 +414,6 @@ static int fan_write_cmd_watchdog(const char *cmd, int *rc);
* Hotkey subdriver
*/
#define TPACPI_HOTKEY_SYSFS_GROUP "hotkey"
static int hotkey_orig_status;
static int hotkey_orig_mask;
@ -553,8 +549,6 @@ static int volume_write(char *buf);
* Wan subdriver
*/
#define TPACPI_WAN_SYSFS_GROUP "wwan"
enum {
/* ACPI GWAN/SWAN bits */
TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */