Re: [RFC PATCH 1/2] platform/x86: uniwill-laptop: Introduce device descriptor system

From: Werner Sembach

Date: Wed Nov 26 2025 - 07:14:57 EST



Am 25.11.25 um 21:18 schrieb Armin Wolf:
Am 25.11.25 um 14:49 schrieb Werner Sembach:

From: Armin Wolf <W_Armin@xxxxxx>

Future additions to the driver will depend on device-specific
initialization steps. Extend the DMI-based feature detection system
to include device descriptors. Each descriptor contains a bitmap of
supported features and a set of callback for performing
device-specific initialization.

Signed-off-by: Armin Wolf <W_Armin@xxxxxx>
Co-developed-by: Werner Sembach <wse@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Werner Sembach <wse@xxxxxxxxxxxxxxxxxxx>
---
  drivers/platform/x86/uniwill/uniwill-acpi.c | 156 ++++++++++++++++----
  1 file changed, 130 insertions(+), 26 deletions(-)

diff --git a/drivers/platform/x86/uniwill/uniwill-acpi.c b/drivers/platform/x86/uniwill/uniwill-acpi.c
index bd7e63dd51810..f6a1054379ee1 100644
--- a/drivers/platform/x86/uniwill/uniwill-acpi.c
+++ b/drivers/platform/x86/uniwill/uniwill-acpi.c
@@ -334,6 +334,7 @@ struct uniwill_data {
      struct mutex input_lock;    /* Protects input sequence during notify */
      struct input_dev *input_device;
      struct notifier_block nb;
+    unsigned int features;

Hi,

could you please move this field just below the regmap field? This would be a good way
to signal the importance of said field for the remaining fields.
ack

  };
    struct uniwill_battery_entry {
@@ -341,12 +342,21 @@ struct uniwill_battery_entry {
      struct power_supply *battery;
  };
  +struct uniwill_device_descriptor {
+    unsigned int features;
+    /* Executed during driver probing */
+    int (*probe)(struct uniwill_data *data);
+};
+
  static bool force;
  module_param_unsafe(force, bool, 0);
  MODULE_PARM_DESC(force, "Force loading without checking for supported devices\n");
  -/* Feature bitmask since the associated registers are not reliable */
-static unsigned int supported_features;
+/*
+ * Contains device specific data like the feature bitmap since
+ * the associated registers are not always reliable.
+ */
+static struct uniwill_device_descriptor device_descriptor __ro_after_init;
    static const char * const uniwill_temp_labels[] = {
      "CPU",
@@ -411,6 +421,12 @@ static const struct key_entry uniwill_keymap[] = {
      { KE_END }
  };
  +static inline bool uniwill_device_supports(struct uniwill_data *data,
+                       unsigned int feature_mask)
+{
+    return data->features & feature_mask;

Do we want to support for testing multiple features at once? If yes then
please change this to:

    return (data->features & feature_mask) == feature_mask;

If no then please rename "feature_mask" to "feature".
sounds usefull, will do

+}
+
  static int uniwill_ec_reg_write(void *context, unsigned int reg, unsigned int val)
  {
      union acpi_object params[2] = {
@@ -799,24 +815,27 @@ static struct attribute *uniwill_attrs[] = {
    static umode_t uniwill_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
  {
+    struct device *dev = kobj_to_dev(kobj);
+    struct uniwill_data *data = dev_get_drvdata(dev);
+
      if (attr == &dev_attr_fn_lock_toggle_enable.attr) {
-        if (supported_features & UNIWILL_FEATURE_FN_LOCK_TOGGLE)
+        if (uniwill_device_supports(data, UNIWILL_FEATURE_FN_LOCK_TOGGLE))
              return attr->mode;
      }
        if (attr == &dev_attr_super_key_toggle_enable.attr) {
-        if (supported_features & UNIWILL_FEATURE_SUPER_KEY_TOGGLE)
+        if (uniwill_device_supports(data, UNIWILL_FEATURE_SUPER_KEY_TOGGLE))
              return attr->mode;
      }
        if (attr == &dev_attr_touchpad_toggle_enable.attr) {
-        if (supported_features & UNIWILL_FEATURE_TOUCHPAD_TOGGLE)
+        if (uniwill_device_supports(data, UNIWILL_FEATURE_TOUCHPAD_TOGGLE))
              return attr->mode;
      }
        if (attr == &dev_attr_rainbow_animation.attr ||
          attr == &dev_attr_breathing_in_suspend.attr) {
-        if (supported_features & UNIWILL_FEATURE_LIGHTBAR)
+        if (uniwill_device_supports(data, UNIWILL_FEATURE_LIGHTBAR))
              return attr->mode;
      }
  @@ -944,7 +963,7 @@ static int uniwill_hwmon_init(struct uniwill_data *data)
  {
      struct device *hdev;
  -    if (!(supported_features & UNIWILL_FEATURE_HWMON))
+    if (!uniwill_device_supports(data, UNIWILL_FEATURE_HWMON))
          return 0;
        hdev = devm_hwmon_device_register_with_info(data->dev, "uniwill", data,
@@ -1019,7 +1038,7 @@ static int uniwill_led_init(struct uniwill_data *data)
      unsigned int value;
      int ret;
  -    if (!(supported_features & UNIWILL_FEATURE_LIGHTBAR))
+    if (!uniwill_device_supports(data, UNIWILL_FEATURE_LIGHTBAR))
          return 0;
        ret = devm_mutex_init(data->dev, &data->led_lock);
@@ -1232,7 +1251,7 @@ static int uniwill_battery_init(struct uniwill_data *data)
  {
      int ret;
  -    if (!(supported_features & UNIWILL_FEATURE_BATTERY))
+    if (!uniwill_device_supports(data, UNIWILL_FEATURE_BATTERY))
          return 0;
        ret = devm_mutex_init(data->dev, &data->battery_lock);
@@ -1361,6 +1380,19 @@ static int uniwill_probe(struct platform_device *pdev)
      if (ret < 0)
          return ret;
  +    data->features = device_descriptor.features;
+
+    /*
+     * Some devices might need to perform some device-specific initialization steps
+     * before the supported features are initialized. Because of this we have to call
+     * this callback just after the EC itself was initialized.
+     */
+    if (device_descriptor.probe) {
+        ret = device_descriptor.probe(data);
+        if (ret < 0)
+            return ret;
+    }
+
      ret = uniwill_battery_init(data);
      if (ret < 0)
          return ret;
@@ -1385,7 +1417,7 @@ static void uniwill_shutdown(struct platform_device *pdev)
    static int uniwill_suspend_keyboard(struct uniwill_data *data)
  {
-    if (!(supported_features & UNIWILL_FEATURE_SUPER_KEY_TOGGLE))
+    if (!uniwill_device_supports(data, UNIWILL_FEATURE_SUPER_KEY_TOGGLE))
          return 0;
        /*
@@ -1397,7 +1429,7 @@ static int uniwill_suspend_keyboard(struct uniwill_data *data)
    static int uniwill_suspend_battery(struct uniwill_data *data)
  {
-    if (!(supported_features & UNIWILL_FEATURE_BATTERY))
+    if (!uniwill_device_supports(data, UNIWILL_FEATURE_BATTERY))
          return 0;
        /*
@@ -1432,7 +1464,7 @@ static int uniwill_resume_keyboard(struct uniwill_data *data)
      unsigned int value;
      int ret;
  -    if (!(supported_features & UNIWILL_FEATURE_SUPER_KEY_TOGGLE))
+    if (!uniwill_device_supports(data, UNIWILL_FEATURE_SUPER_KEY_TOGGLE))
          return 0;
        ret = regmap_read(data->regmap, EC_ADDR_SWITCH_STATUS, &value);
@@ -1448,7 +1480,7 @@ static int uniwill_resume_keyboard(struct uniwill_data *data)
    static int uniwill_resume_battery(struct uniwill_data *data)
  {
-    if (!(supported_features & UNIWILL_FEATURE_BATTERY))
+    if (!uniwill_device_supports(data, UNIWILL_FEATURE_BATTERY))
          return 0;
        return regmap_update_bits(data->regmap, EC_ADDR_CHARGE_CTRL, CHARGE_CTRL_MASK,
@@ -1496,6 +1528,25 @@ static struct platform_driver uniwill_driver = {
      .shutdown = uniwill_shutdown,
  };
  +struct uniwill_device_descriptor lapac71h_descriptor __initdata = {
+    .features = UNIWILL_FEATURE_FN_LOCK_TOGGLE |
+            UNIWILL_FEATURE_SUPER_KEY_TOGGLE |
+            UNIWILL_FEATURE_TOUCHPAD_TOGGLE |
+            UNIWILL_FEATURE_BATTERY |
+            UNIWILL_FEATURE_HWMON
+};
+
+struct uniwill_device_descriptor lapkc71f_descriptor __initdata = {
+    .features = UNIWILL_FEATURE_FN_LOCK_TOGGLE |
+            UNIWILL_FEATURE_SUPER_KEY_TOGGLE |
+            UNIWILL_FEATURE_TOUCHPAD_TOGGLE |
+            UNIWILL_FEATURE_LIGHTBAR |
+            UNIWILL_FEATURE_BATTERY |
+            UNIWILL_FEATURE_HWMON
+};
+
+struct uniwill_device_descriptor void_descriptor __initdata = {};

void_descriptor -> empty_descriptor.
ack

With the above issues being fixed:

Reviewed-by: Armin Wolf <W_Armin@xxxxxx>

+
  static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
      {
          .ident = "XMG FUSION 15",
@@ -1503,6 +1554,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "SchenkerTechnologiesGmbH"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "LAPQC71A"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "XMG FUSION 15",
@@ -1510,6 +1562,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "SchenkerTechnologiesGmbH"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "LAPQC71B"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "Intel NUC x15",
@@ -1517,11 +1570,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel(R) Client Systems"),
              DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "LAPAC71H"),
          },
-        .driver_data = (void *)(UNIWILL_FEATURE_FN_LOCK_TOGGLE |
-                    UNIWILL_FEATURE_SUPER_KEY_TOGGLE |
-                    UNIWILL_FEATURE_TOUCHPAD_TOGGLE |
-                    UNIWILL_FEATURE_BATTERY |
-                    UNIWILL_FEATURE_HWMON),
+        .driver_data = &lapac71h_descriptor,
      },
      {
          .ident = "Intel NUC x15",
@@ -1529,12 +1578,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel(R) Client Systems"),
              DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "LAPKC71F"),
          },
-        .driver_data = (void *)(UNIWILL_FEATURE_FN_LOCK_TOGGLE |
-                    UNIWILL_FEATURE_SUPER_KEY_TOGGLE |
-                    UNIWILL_FEATURE_TOUCHPAD_TOGGLE |
-                    UNIWILL_FEATURE_LIGHTBAR |
-                    UNIWILL_FEATURE_BATTERY |
-                    UNIWILL_FEATURE_HWMON),
+        .driver_data = &lapkc71f_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 14 Gen6 Intel",
@@ -1542,6 +1586,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PHxTxX1"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 14 Gen6 Intel",
@@ -1549,6 +1594,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PHxTQx1"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 14/16 Gen7 Intel",
@@ -1556,6 +1602,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PHxARX1_PHxAQF1"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 16 Gen7 Intel/Commodore Omnia-Book Pro Gen 7",
@@ -1563,6 +1610,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PH6AG01_PH6AQ71_PH6AQI1"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 14/16 Gen8 Intel/Commodore Omnia-Book Pro Gen 8",
@@ -1570,6 +1618,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PH4PRX1_PH6PRX1"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 14 Gen8 Intel/Commodore Omnia-Book Pro Gen 8",
@@ -1577,6 +1626,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PH4PG31"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 16 Gen8 Intel",
@@ -1584,6 +1634,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PH6PG01_PH6PG71"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 14/15 Gen9 AMD",
@@ -1591,6 +1642,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GXxHRXx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 14/15 Gen9 Intel/Commodore Omnia-Book 15 Gen9",
@@ -1598,6 +1650,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GXxMRXx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 14/15 Gen10 AMD",
@@ -1605,6 +1658,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "XxHP4NAx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 14/15 Gen10 AMD",
@@ -1612,6 +1666,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "XxKK4NAx_XxSP4NAx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Pro 15 Gen10 Intel",
@@ -1619,6 +1674,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "XxAR4NAx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Max 15 Gen10 AMD",
@@ -1626,6 +1682,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "X5KK45xS_X5SP45xS"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Max 16 Gen10 AMD",
@@ -1633,6 +1690,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "X6HP45xU"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Max 16 Gen10 AMD",
@@ -1640,6 +1698,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "X6KK45xU_X6SP45xU"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Max 15 Gen10 Intel",
@@ -1647,6 +1706,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "X5AR45xS"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO InfinityBook Max 16 Gen10 Intel",
@@ -1654,6 +1714,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "X6AR55xU"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 15 Gen1 AMD",
@@ -1661,6 +1722,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "POLARIS1501A1650TI"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 15 Gen1 AMD",
@@ -1668,6 +1730,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "POLARIS1501A2060"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 17 Gen1 AMD",
@@ -1675,6 +1738,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "POLARIS1701A1650TI"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 17 Gen1 AMD",
@@ -1682,6 +1746,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "POLARIS1701A2060"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 15 Gen1 Intel",
@@ -1689,6 +1754,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "POLARIS1501I1650TI"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 15 Gen1 Intel",
@@ -1696,6 +1762,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "POLARIS1501I2060"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 17 Gen1 Intel",
@@ -1703,6 +1770,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "POLARIS1701I1650TI"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 17 Gen1 Intel",
@@ -1710,6 +1778,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "POLARIS1701I2060"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Trinity 15 Intel Gen1",
@@ -1717,6 +1786,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "TRINITY1501I"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Trinity 17 Intel Gen1",
@@ -1724,6 +1794,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "TRINITY1701I"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 15/17 Gen2 AMD",
@@ -1731,6 +1802,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxMGxx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 15/17 Gen2 Intel",
@@ -1738,6 +1810,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxNGxx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris/Polaris 15/17 Gen3 AMD",
@@ -1745,6 +1818,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxZGxx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris/Polaris 15/17 Gen3 Intel",
@@ -1752,6 +1826,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxTGxx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris/Polaris 15/17 Gen4 AMD",
@@ -1759,6 +1834,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris 15 Gen4 Intel",
@@ -1766,6 +1842,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxAGxx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Polaris 15/17 Gen5 AMD",
@@ -1773,6 +1850,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxXGxx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris 16 Gen5 AMD",
@@ -1780,6 +1858,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM6XGxX"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris 16/17 Gen5 Intel/Commodore ORION Gen 5",
@@ -1787,6 +1866,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxPXxx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris Slim 15 Gen6 AMD",
@@ -1794,6 +1874,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxHGxx"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris Slim 15 Gen6 Intel/Commodore ORION Slim 15 Gen6",
@@ -1801,6 +1882,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM5IXxA"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris 16 Gen6 Intel/Commodore ORION 16 Gen6",
@@ -1808,6 +1890,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM6IXxB_MB1"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris 16 Gen6 Intel/Commodore ORION 16 Gen6",
@@ -1815,6 +1898,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM6IXxB_MB2"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris 17 Gen6 Intel/Commodore ORION 17 Gen6",
@@ -1822,6 +1906,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM7IXxN"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris 16 Gen7 AMD",
@@ -1829,6 +1914,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "X6FR5xxY"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris 16 Gen7 Intel",
@@ -1836,6 +1922,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "X6AR5xxY"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Stellaris 16 Gen7 Intel",
@@ -1843,6 +1930,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "X6AR5xxY_mLED"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Pulse 14 Gen1 AMD",
@@ -1850,6 +1938,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PULSE1401"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Pulse 15 Gen1 AMD",
@@ -1857,6 +1946,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PULSE1501"),
          },
+        .driver_data = &void_descriptor,
      },
      {
          .ident = "TUXEDO Pulse 15 Gen2 AMD",
@@ -1864,6 +1954,7 @@ static const struct dmi_system_id uniwill_dmi_table[] __initconst = {
              DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
              DMI_EXACT_MATCH(DMI_BOARD_NAME, "PF5LUXG"),
          },
+        .driver_data = &void_descriptor,
      },
      { }
  };
@@ -1871,6 +1962,7 @@ MODULE_DEVICE_TABLE(dmi, uniwill_dmi_table);
    static int __init uniwill_init(void)
  {
+    const struct uniwill_device_descriptor *descriptor;
      const struct dmi_system_id *id;
      int ret;
  @@ -1880,10 +1972,22 @@ static int __init uniwill_init(void)
              return -ENODEV;
            /* Assume that the device supports all features */
-        supported_features = UINT_MAX;
+        device_descriptor.features = UINT_MAX;
          pr_warn("Loading on a potentially unsupported device\n");
      } else {
-        supported_features = (uintptr_t)id->driver_data;
+        /*
+         * Some devices might support additional features depending on
+         * the BIOS version/date, so we call this callback to let them
+         * modify their device descriptor accordingly.
+         */
+        if (id->callback) {
+            ret = id->callback(id);
+            if (ret < 0)
+                return ret;
+        }
+
+        descriptor = id->driver_data;
+        device_descriptor = *descriptor;
      }
        ret = platform_driver_register(&uniwill_driver);