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authorBastien Nocera <hadess@hadess.net>2015-03-02 16:45:27 +0300
committerDarren Hart <dvhart@linux.intel.com>2015-03-03 20:00:08 +0300
commitb790ceeb0fd94725150219abd8c13b08a17a32e3 (patch)
tree33d9de70fd13dcb99d9ae93b68ad000033f83906
parentf74587fb9308dd6d4346180672d79b8a861f02dd (diff)
downloadlinux-b790ceeb0fd94725150219abd8c13b08a17a32e3.tar.xz
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>
-rw-r--r--Documentation/laptops/thinkpad-acpi.txt18
-rw-r--r--drivers/platform/x86/thinkpad_acpi.c69
2 files changed, 78 insertions, 9 deletions
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index fc04c14de4bb..72a150d8f3df 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -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
------------------------------------
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 5dea4c270482..ae528cf0b143 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -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 @@ err_exit:
* 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,