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thinkpad_acpi: Add adaptive_kbd_mode sysfs attr 

Add a sysfs attribute to allow privileged users to change the keyboard
mode. This could be used by desktop environments to change the keyboard
mode depending on the application focused, as the Windows application
does.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This commit is contained in:
Bastien Nocera 2015-03-02 14:45:27 +01:00 committed by Darren Hart
parent f74587fb93
commit b790ceeb0f
2 changed files with 78 additions and 9 deletions
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18
Documentation/laptops/thinkpad-acpi.txt
View File

@ -1355,6 +1355,24 @@ Sysfs notes:
rfkill controller switch "tpacpi_uwb_sw": refer to
Documentation/rfkill.txt for details.
Adaptive keyboard
-----------------
sysfs device attribute: adaptive_kbd_mode
This sysfs attribute controls the keyboard "face" that will be shown on the
Lenovo X1 Carbon 2nd gen (2014)'s adaptive keyboard. The value can be read
and set.
1 = Home mode
2 = Web-browser mode
3 = Web-conference mode
4 = Function mode
5 = Layflat mode
For more details about which buttons will appear depending on the mode, please
review the laptop's user guide:
http://www.lenovo.com/shop/americas/content/user_guides/x1carbon_2_ug_en.pdf
Multiple Commands, Module Parameters
------------------------------------

69
drivers/platform/x86/thinkpad_acpi.c
View File

@ -2918,6 +2918,57 @@ static void hotkey_wakeup_hotunplug_complete_notify_change(void)
"wakeup_hotunplug_complete");
}
/* sysfs adaptive kbd mode --------------------------------------------- */
static int adaptive_keyboard_get_mode(void);
static int adaptive_keyboard_set_mode(int new_mode);
enum ADAPTIVE_KEY_MODE {
HOME_MODE,
WEB_BROWSER_MODE,
WEB_CONFERENCE_MODE,
FUNCTION_MODE,
LAYFLAT_MODE
};
static ssize_t adaptive_kbd_mode_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
u32 current_mode;
current_mode = adaptive_keyboard_get_mode();
if (current_mode < 0)
return current_mode;
return snprintf(buf, PAGE_SIZE, "%d\n", current_mode);
}
static ssize_t adaptive_kbd_mode_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
int res;
if (parse_strtoul(buf, LAYFLAT_MODE, &t))
return -EINVAL;
res = adaptive_keyboard_set_mode(t);
return (res < 0) ? res : count;
}
static DEVICE_ATTR_RW(adaptive_kbd_mode);
static struct attribute *adaptive_kbd_attributes[] = {
&dev_attr_adaptive_kbd_mode.attr,
NULL
};
static const struct attribute_group adaptive_kbd_attr_group = {
.attrs = adaptive_kbd_attributes,
};
/* --------------------------------------------------------------------- */
static struct attribute *hotkey_attributes[] __initdata = {
@ -3233,8 +3284,13 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
* Lenovo Carbon X1 2014 (2nd Gen).
*/
if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
if ((hkeyv >> 8) == 2)
if ((hkeyv >> 8) == 2) {
tp_features.has_adaptive_kbd = true;
res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
&adaptive_kbd_attr_group);
if (res)
goto err_exit;
}
}
quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
@ -3447,6 +3503,9 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
err_exit:
delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
sysfs_remove_group(&tpacpi_pdev->dev.kobj,
&adaptive_kbd_attr_group);
hotkey_dev_attributes = NULL;
return (res < 0) ? res : 1;
@ -3459,14 +3518,6 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
* Will consider support rest of modes in future.
*
*/
enum ADAPTIVE_KEY_MODE {
HOME_MODE,
WEB_BROWSER_MODE,
WEB_CONFERENCE_MODE,
FUNCTION_MODE,
LAYFLAT_MODE
};
static const int adaptive_keyboard_modes[] = {
HOME_MODE,
/* WEB_BROWSER_MODE = 2,