From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5450BC7EE25 for ; Sat, 29 Apr 2023 18:17:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230005AbjD2SRj (ORCPT ); Sat, 29 Apr 2023 14:17:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229790AbjD2SRi (ORCPT ); Sat, 29 Apr 2023 14:17:38 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A68F2136 for ; Sat, 29 Apr 2023 11:16:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1682792213; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=GeUgYfkqgLgpfATNOxLpfDS57EMI2u4Oz2WBeO/5uKY=; b=Tp7fAB5tNq7/k1Vd2QvVA0XUhIT4g91Fdg1L34TpaAuifEuZ4rQLNPKl4YA2qbcnVUhrYh p295cgJ7SPtXjqgtyJU3qM1ja9ftm8YGcC8OJg9EwZc4nz63DZRUPcv7UEh03ie5hblSqR SVSwgye5iaOrrJTBA2SNVXqy98M/9bU= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-84-JQbr1VXeN-q2mFoJkHbjUg-1; Sat, 29 Apr 2023 14:16:49 -0400 X-MC-Unique: JQbr1VXeN-q2mFoJkHbjUg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 898D0185A79C; Sat, 29 Apr 2023 18:16:48 +0000 (UTC) Received: from localhost.localdomain (unknown [10.39.192.57]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6EF452027043; Sat, 29 Apr 2023 18:16:47 +0000 (UTC) From: Hans de Goede To: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Andy Shevchenko , Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Cc: Hans de Goede , Yauhen Kharuzhy , platform-driver-x86@vger.kernel.org, linux-pwm@vger.kernel.org Subject: [PATCH 17/19] platform/x86: lenovo-yogabook: Add platform driver support Date: Sat, 29 Apr 2023 20:15:49 +0200 Message-Id: <20230429181551.98201-18-hdegoede@redhat.com> In-Reply-To: <20230429181551.98201-1-hdegoede@redhat.com> References: <20230429181551.98201-1-hdegoede@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org The Lenovo Yoga Book 1 comes in 2 versions. Version 1: The yb1-x91f/l currently supported by lenovo-yogabook-wmi, which has a WMI interface to deal with toggling the keyboard half between touch-keyboard and wacom-digitizer mode. Version 2: The yb1-x90f/l which is the same hardware shipping with Android as factory OS. This version has a very different BIOS and ACPI tables which lack the WMI interface. Instead the x86-android-tablets.ko code which does devices instantiation for devices missing from ACPI on various x86 Android tablets will instantiate a platform device for the keyboard half touch-kbd/digitizer toggle functionality. This patch adds a platform driver to the lenovo-yogabook code which binds to the platform device instantiated by x86-android-tablets.ko offering touch-kbd/digitizer toggle functionality on the Android model. Signed-off-by: Hans de Goede --- drivers/platform/x86/lenovo-yogabook-wmi.c | 160 ++++++++++++++++++++- 1 file changed, 156 insertions(+), 4 deletions(-) diff --git a/drivers/platform/x86/lenovo-yogabook-wmi.c b/drivers/platform/x86/lenovo-yogabook-wmi.c index 0c5475127ac2..afb11d25abc8 100644 --- a/drivers/platform/x86/lenovo-yogabook-wmi.c +++ b/drivers/platform/x86/lenovo-yogabook-wmi.c @@ -1,13 +1,25 @@ // SPDX-License-Identifier: GPL-2.0 -/* WMI driver for Lenovo Yoga Book YB1-X90* / -X91* tablets */ +/* + * Platform driver for Lenovo Yoga Book YB1-X90F/L tablets (Android model) + * WMI driver for Lenovo Yoga Book YB1-X91F/L tablets (Windows model) + * + * The keyboard half of the YB1 models can function as both a capactive touch + * keyboard or as a Wacom digitizer, but not at the same time. + * + * This driver takes care of switching between the 2 functions. + * + * Copyright 2023 Hans de Goede + */ #include #include #include #include +#include #include -#include #include +#include +#include #include #include @@ -16,6 +28,8 @@ #define YB_KBD_BL_DEFAULT 128 #define YB_KBD_BL_MAX 255 +#define YB_PDEV_NAME "yogabook-touch-kbd-digitizer-switch" + /* flags */ enum { YB_KBD_IS_ON, @@ -32,8 +46,11 @@ struct yogabook_data { struct device *kbd_dev; struct device *dig_dev; struct led_classdev *pen_led; + struct gpio_desc *pen_touch_event; + struct gpio_desc *kbd_bl_led_enable; struct gpio_desc *backside_hall_gpio; int (*set_kbd_backlight)(struct yogabook_data *data, u8 level); + int pen_touch_irq; int backside_hall_irq; struct work_struct work; struct led_classdev kbd_bl_led; @@ -282,6 +299,8 @@ static int yogabook_resume(struct device *dev) static DEFINE_SIMPLE_DEV_PM_OPS(yogabook_pm_ops, yogabook_suspend, yogabook_resume); +/********** WMI driver code **********/ + /* * To control keyboard backlight, call the method KBLC() of the TCS1 ACPI * device (Goodix touchpad acts as virtual sensor keyboard). @@ -402,8 +421,141 @@ static struct wmi_driver yogabook_wmi_driver = { .remove = yogabook_wmi_remove, .notify = yogabook_wmi_notify, }; -module_wmi_driver(yogabook_wmi_driver); +/********** platform driver code **********/ + +static struct gpiod_lookup_table yogabook_pdev_gpios = { + .dev_id = YB_PDEV_NAME, + .table = { + GPIO_LOOKUP("INT33FF:00", 95, "pen_touch_event", GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("INT33FF:03", 52, "enable_keyboard_led", GPIO_ACTIVE_HIGH), + {} + }, +}; + +static int yogabook_pdev_set_kbd_backlight(struct yogabook_data *data, u8 level) +{ + gpiod_set_value(data->kbd_bl_led_enable, level ? 1 : 0); + return 0; +} + +static irqreturn_t yogabook_pen_touch_irq(int irq, void *data) +{ + yogabook_toggle_digitizer_mode(data); + return IRQ_HANDLED; +} + +static int yogabook_pdev_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct yogabook_data *data; + int r; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + data->kbd_dev = bus_find_device_by_name(&i2c_bus_type, NULL, "i2c-goodix_ts"); + if (!data->kbd_dev || !data->kbd_dev->driver) { + r = -EPROBE_DEFER; + goto error_put_devs; + } + + data->dig_dev = bus_find_device_by_name(&i2c_bus_type, NULL, "i2c-wacom"); + if (!data->dig_dev || !data->dig_dev->driver) { + r = -EPROBE_DEFER; + goto error_put_devs; + } + + gpiod_add_lookup_table(&yogabook_pdev_gpios); + data->pen_touch_event = devm_gpiod_get(dev, "pen_touch_event", GPIOD_IN); + data->kbd_bl_led_enable = devm_gpiod_get(dev, "enable_keyboard_led", GPIOD_OUT_HIGH); + gpiod_remove_lookup_table(&yogabook_pdev_gpios); + + if (IS_ERR(data->pen_touch_event)) { + r = PTR_ERR(data->pen_touch_event); + dev_err_probe(dev, r, "Getting pen_touch_event GPIO\n"); + goto error_put_devs; + } + + if (IS_ERR(data->kbd_bl_led_enable)) { + r = PTR_ERR(data->kbd_bl_led_enable); + dev_err_probe(dev, r, "Getting enable_keyboard_led GPIO\n"); + goto error_put_devs; + } + + r = gpiod_to_irq(data->pen_touch_event); + if (r < 0) { + dev_err_probe(dev, r, "Getting pen_touch_event IRQ\n"); + return r; + } + data->pen_touch_irq = r; + + r = request_irq(data->pen_touch_irq, yogabook_pen_touch_irq, IRQF_TRIGGER_FALLING, + "pen_touch_event", data); + if (r) { + dev_err_probe(dev, r, "Requesting backside_hall_sw IRQ\n"); + return r; + } + + data->set_kbd_backlight = yogabook_pdev_set_kbd_backlight; + + r = yogabook_probe(dev, data, "yogabook::kbd_backlight"); + if (r) + goto error_free_irq; + + return 0; + +error_free_irq: + free_irq(data->pen_touch_irq, data); + cancel_work_sync(&data->work); +error_put_devs: + put_device(data->dig_dev); + put_device(data->kbd_dev); + return r; +} + +static void yogabook_pdev_remove(struct platform_device *pdev) +{ + struct yogabook_data *data = platform_get_drvdata(pdev); + + yogabook_remove(data); + free_irq(data->pen_touch_irq, data); + cancel_work_sync(&data->work); + put_device(data->dig_dev); + put_device(data->kbd_dev); +} + +static struct platform_driver yogabook_pdev_driver = { + .probe = yogabook_pdev_probe, + .remove_new = yogabook_pdev_remove, + .driver = { + .name = YB_PDEV_NAME, + .pm = pm_sleep_ptr(&yogabook_pm_ops), + }, +}; + +static int __init yogabook_module_init(void) +{ + int r; + + r = wmi_driver_register(&yogabook_wmi_driver); + if (r) + return r; + + return platform_driver_register(&yogabook_pdev_driver); +} + +static void __exit yogabook_module_exit(void) +{ + platform_driver_unregister(&yogabook_pdev_driver); + wmi_driver_unregister(&yogabook_wmi_driver); +} + +module_init(yogabook_module_init); +module_exit(yogabook_module_exit); + +MODULE_ALIAS("platform:" YB_PDEV_NAME); MODULE_AUTHOR("Yauhen Kharuzhy"); -MODULE_DESCRIPTION("Lenovo Yoga Book WMI driver"); +MODULE_DESCRIPTION("Lenovo Yoga Book driver"); MODULE_LICENSE("GPL v2"); -- 2.39.2