platform/x86: x86-android-tablets: Add Advantech MICA-071 extra button

The Advantech MICA-071 is a standard Windows tablet, but it has an extra
"quick launch" button which is not described in the ACPI tables in anyway.

Use the x86-android-tablets infra to create a gpio-button device for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20221127221928.123660-1-hdegoede@redhat.com

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index bbfae1395e18c7d17a9785be9b2cba83aaf383e5..123a4618db55fa796487580820f48e889acb43e0 100644 (file)
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -265,6 +265,56 @@ static struct gpiod_lookup_table int3496_gpo2_pin22_gpios = {
        },
 };
 
+/*
+ * Advantech MICA-071
+ * This is a standard Windows tablet, but it has an extra "quick launch" button
+ * which is not described in the ACPI tables in anyway.
+ * Use the x86-android-tablets infra to create a gpio-button device for this.
+ */
+static struct gpio_keys_button advantech_mica_071_button = {
+       .code = KEY_PROG1,
+       /* .gpio gets filled in by advantech_mica_071_init() */
+       .active_low = true,
+       .desc = "prog1_key",
+       .type = EV_KEY,
+       .wakeup = false,
+       .debounce_interval = 50,
+};
+
+static const struct gpio_keys_platform_data advantech_mica_071_button_pdata __initconst = {
+       .buttons = &advantech_mica_071_button,
+       .nbuttons = 1,
+       .name = "prog1_key",
+};
+
+static const struct platform_device_info advantech_mica_071_pdevs[] __initconst = {
+       {
+               .name = "gpio-keys",
+               .id = PLATFORM_DEVID_AUTO,
+               .data = &advantech_mica_071_button_pdata,
+               .size_data = sizeof(advantech_mica_071_button_pdata),
+       },
+};
+
+static int __init advantech_mica_071_init(void)
+{
+       struct gpio_desc *gpiod;
+       int ret;
+
+       ret = x86_android_tablet_get_gpiod("INT33FC:00", 2, &gpiod);
+       if (ret < 0)
+               return ret;
+       advantech_mica_071_button.gpio = desc_to_gpio(gpiod);
+
+       return 0;
+}
+
+static const struct x86_dev_info advantech_mica_071_info __initconst = {
+       .pdev_info = advantech_mica_071_pdevs,
+       .pdev_count = ARRAY_SIZE(advantech_mica_071_pdevs),
+       .init = advantech_mica_071_init,
+};
+
 /* Asus ME176C and TF103C tablets shared data */
 static struct gpio_keys_button asus_me176c_tf103c_lid = {
        .code = SW_LID,
@@ -1385,6 +1435,14 @@ static const struct x86_dev_info xiaomi_mipad2_info __initconst = {
 };
 
 static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
+       {
+               /* Advantech MICA-071 */
+               .matches = {
+                       DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Advantech"),
+                       DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "MICA-071"),
+               },
+               .driver_data = (void *)&advantech_mica_071_info,
+       },
        {
                /* Asus MeMO Pad 7 ME176C */
                .matches = {