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platform/x86: uniwill-laptop: Add AC auto boot support

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Some devices support a "AC auto boot" feature where the system will
automatically boot when being connected to a power source.

Add support for this feature.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20260530170813.10166-4-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Armin Wolf 2026-05-30 19:08:09 +02:00 committed by Ilpo Järvinen
parent 69be0016c1
commit c393505bab
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GPG Key ID: 59AC4F6153E5CE31
3 changed files with 69 additions and 0 deletions
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11
Documentation/ABI/testing/sysfs-driver-uniwill-laptop
View File

@ -78,3 +78,14 @@ Description:
Reading this file returns the profile names with the currently active one in
brackets.
What: /sys/bus/platform/devices/INOU0000:XX/ac_auto_boot
Date: March 2026
KernelVersion: 7.1
Contact: Armin Wolf <W_Armin@gmx.de>
Description:
Allows userspace applications to configure if the device should boot automatically
when being connected to a power source. Writing "1"/"0" into this file
enables/disables this functionality.
Reading this file returns the current status of the AC auto boot functionality.

7
Documentation/admin-guide/laptops/uniwill-laptop.rst
View File

@ -98,6 +98,13 @@ allow it.
See Documentation/ABI/testing/sysfs-driver-uniwill-laptop for details.
AC Auto Boot
------------
The ``uniwill-laptop`` driver allows the user to configure if the system should automatically
boot when being connected to a power source, see
Documentation/ABI/testing/sysfs-driver-uniwill-laptop for details.
References
==========

51
drivers/platform/x86/uniwill/uniwill-acpi.c
View File

@ -112,6 +112,9 @@
#define EC_ADDR_BAT_CYCLE_COUNT_2 0x04A7
#define EC_ADDR_OEM_9 0x0726
#define AC_AUTO_BOOT_ENABLE BIT(3)
#define EC_ADDR_PROJECT_ID 0x0740
#define PROJECT_ID_NONE 0x00
#define PROJECT_ID_GI 0x01
@ -364,6 +367,7 @@
#define UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL BIT(10)
#define UNIWILL_FEATURE_USB_C_POWER_PRIORITY BIT(11)
#define UNIWILL_FEATURE_KEYBOARD_BACKLIGHT BIT(12)
#define UNIWILL_FEATURE_AC_AUTO_BOOT BIT(13)
enum usb_c_power_priority_options {
USB_C_POWER_PRIORITY_CHARGING = 0,
@ -586,6 +590,7 @@ static const struct regmap_bus uniwill_ec_bus = {
static bool uniwill_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case EC_ADDR_OEM_9:
case EC_ADDR_AP_OEM:
case EC_ADDR_LIGHTBAR_AC_CTRL:
case EC_ADDR_LIGHTBAR_AC_RED:
@ -625,6 +630,7 @@ static bool uniwill_readable_reg(struct device *dev, unsigned int reg)
case EC_ADDR_SECOND_FAN_RPM_1:
case EC_ADDR_SECOND_FAN_RPM_2:
case EC_ADDR_BAT_ALERT:
case EC_ADDR_OEM_9:
case EC_ADDR_PROJECT_ID:
case EC_ADDR_AP_OEM:
case EC_ADDR_LIGHTBAR_AC_CTRL:
@ -1136,6 +1142,45 @@ static int usb_c_power_priority_init(struct uniwill_data *data)
return 0;
}
static ssize_t ac_auto_boot_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct uniwill_data *data = dev_get_drvdata(dev);
unsigned int regval;
bool enable;
int ret;
ret = kstrtobool(buf, &enable);
if (ret < 0)
return ret;
if (enable)
regval = AC_AUTO_BOOT_ENABLE;
else
regval = 0;
ret = regmap_update_bits(data->regmap, EC_ADDR_OEM_9, AC_AUTO_BOOT_ENABLE, regval);
if (ret < 0)
return ret;
return count;
}
static ssize_t ac_auto_boot_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct uniwill_data *data = dev_get_drvdata(dev);
unsigned int regval;
int ret;
ret = regmap_read(data->regmap, EC_ADDR_OEM_9, &regval);
if (ret < 0)
return ret;
return sysfs_emit(buf, "%d\n", !!(regval & AC_AUTO_BOOT_ENABLE));
}
static DEVICE_ATTR_RW(ac_auto_boot);
static struct attribute *uniwill_attrs[] = {
/* Keyboard-related */
&dev_attr_fn_lock.attr,
@ -1147,6 +1192,7 @@ static struct attribute *uniwill_attrs[] = {
/* Power-management-related */
&dev_attr_ctgp_offset.attr,
&dev_attr_usb_c_power_priority.attr,
&dev_attr_ac_auto_boot.attr,
NULL
};
@ -1186,6 +1232,11 @@ static umode_t uniwill_attr_is_visible(struct kobject *kobj, struct attribute *a
return attr->mode;
}
if (attr == &dev_attr_ac_auto_boot.attr) {
if (uniwill_device_supports(data, UNIWILL_FEATURE_AC_AUTO_BOOT))
return attr->mode;
}
return 0;
}