From patchwork Tue May 25 05:41:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: aaeon.asus@gmail.com X-Patchwork-Id: 447577 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B927C47085 for ; Tue, 25 May 2021 05:42:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F24F761414 for ; Tue, 25 May 2021 05:42:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229621AbhEYFnh (ORCPT ); Tue, 25 May 2021 01:43:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230481AbhEYFng (ORCPT ); Tue, 25 May 2021 01:43:36 -0400 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE020C061756 for ; Mon, 24 May 2021 22:42:07 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id p39so6377483pfw.8 for ; Mon, 24 May 2021 22:42:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Esg6LeOc6bJsT02jeXcj/gmvXiILRk/16j5XYfZ5mtE=; b=gQylkIWlXLdfodPQ7CQR10rmCNbRUYdXvOoa0HeSKw2ucoscK7zh0kOnnrCBGbmmGs guVt2BTHfWSwiieEZxNyPXrzh1vq1o/IkCw17fbMw8JWN32S58EdH2rzr50nR2u4F/nz KMHj6ObcN3tBPZeYbPyk94DKe52sV7ZGSv9L+DoIkOn+iFemBIUlGxeCUPKPvWpZ77nz eR1AsHOqRpsN0gE/fWIGf4m6fPkTW80NGTA4QSyZ9jhrX7kOy8PDIFqKdRK+EkbEMWwa f4TjD6H93CPEGjMCSmaPl8K9qQVwSliLLSmghjcngScxWLqvG7eHzScnGyN9ordzPf5b gnrA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Esg6LeOc6bJsT02jeXcj/gmvXiILRk/16j5XYfZ5mtE=; b=aVuNdU0tn/szxO+Q9tzxZeh5UFjlu+obtP8Sr6pIqwhmVmG27P3OAbnxYsWNtGf5o/ C9WpHTqWgOxStMVL2nYuONGiYiOSgZ2a11MJe0M39PH+2RTRARDFsFXV3U9tyuus5AP0 unvlVdwSVbEsI3ntPLphlEaSZEuKCpSN0/34MNIkShTb97LluOXQhRlndqdZTEgCgFzV Zm0MT6qxVX7HX9t+atIObtTPdJIYMzvp1+AGCuqCEBrqSMXJ6s4H2iODsB/Ct/IxNt1x qo2BmYqSjhBRvAOQ7UcpduBK7NGqboFNhrq0IRZCKDmO+ECZSJNLLNQVbU/Vpr3jmRE7 x6NQ== X-Gm-Message-State: AOAM531v3Uc45QEY5sC3oylaPBRkXXQHOsFl52CzdqueEet1Ts+kEN/g r0Hq/zfs/CDAZ7dp2sdlwq3Nt5CJScA= X-Google-Smtp-Source: ABdhPJwuL8Id6mDOXgI7lpmhyDAWPiYAMFRMzV4NBJufLOM+fa1oDReFA0Rj0IrdaBUAkDFlCdg06g== X-Received: by 2002:a63:e4a:: with SMTP id 10mr17604156pgo.67.1621921327222; Mon, 24 May 2021 22:42:07 -0700 (PDT) Received: from asus-UPX-TGL01.hitronhub.home ([61.64.1.242]) by smtp.gmail.com with ESMTPSA id m3sm13208256pfh.174.2021.05.24.22.42.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 May 2021 22:42:07 -0700 (PDT) From: aaeon.asus@gmail.com X-Google-Original-From: kunyang_fan@asus.com To: linux-gpio@vger.kernel.org Cc: acelan.kao@canonical.com, Kunyang_Fan Subject: [PATCH 5/5] leds: add driver for AAEON devices Date: Tue, 25 May 2021 13:41:49 +0800 Message-Id: <20210525054149.1792-5-kunyang_fan@asus.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210525054149.1792-1-kunyang_fan@asus.com> References: <20210525054149.1792-1-kunyang_fan@asus.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Kunyang_Fan This patch adds support for the led devices which can be controlled from sysfs through ASUS WMI interface. Signed-off-by: Kunyang_Fan --- drivers/leds/Kconfig | 11 +++ drivers/leds/Makefile | 1 + drivers/leds/leds-aaeon.c | 142 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 154 insertions(+) create mode 100644 drivers/leds/leds-aaeon.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index be4536eef1fe..34d1b80855af 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -49,6 +49,17 @@ config LEDS_88PM860X This option enables support for on-chip LED drivers found on Marvell Semiconductor 88PM8606 PMIC. +config LEDS_AAEON + tristate "AAEON LED driver" + depends on X86 + select MFD_AAEON + help + This led driver adds support for LED brightness control on Single + Board Computers produced by AAEON. + + This driver leverages the ASUS WMI interface to access device + resources. + config LEDS_AAT1290 tristate "LED support for the AAT1290" depends on LEDS_CLASS_FLASH diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index d6b8a792c936..a8a77acc5e11 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o # LED Platform Drivers (keep this sorted, M-| sort) obj-$(CONFIG_LEDS_88PM860X) += leds-88pm860x.o +obj-$(CONFIG_LEDS_AAEON) += leds-aaeon.o obj-$(CONFIG_LEDS_AAT1290) += leds-aat1290.o obj-$(CONFIG_LEDS_ADP5520) += leds-adp5520.o obj-$(CONFIG_LEDS_AN30259A) += leds-an30259a.o diff --git a/drivers/leds/leds-aaeon.c b/drivers/leds/leds-aaeon.c new file mode 100644 index 000000000000..10090a4bff65 --- /dev/null +++ b/drivers/leds/leds-aaeon.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * AAEON LED driver + * + * Copyright (c) 2021, AAEON Ltd. + * + * Author: Kunyang Fan + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ +#include +#include +#include +#include +#include +#include + +#define DRVNAME "led_aaeon" +#define ASUS_NB_WMI_EVENT_GUID "0B3CBB35-E3C2-45ED-91C2-4C5A6D195D1C" +#define AAEON_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66" + +#define GET_LED_NUMBER_ID 0x00060000 +#define GET_LED_METHOD_ID 0x00060001 +#define SET_LED_METHOD_ID 0x00060002 +#define GET_LED_NUMBER_METHOD_ID 0x10 + + +struct aaeon_led_data { + int id; + struct led_classdev cdev; +}; + +static int aaeon_led_get_number(void) +{ + int err, retval; + + err = asus_wmi_evaluate_method(GET_LED_NUMBER_ID, + GET_LED_NUMBER_METHOD_ID, + 0, &retval); + if (err) + return err; + + return retval; +} + +static enum led_brightness aaeon_led_brightness_get(struct led_classdev + *cdev) +{ + int err, brightness; + struct aaeon_led_data *led = + container_of(cdev, struct aaeon_led_data, cdev); + u32 arg0; + + arg0 = (u32)(led->id & 0xF); + err = asus_wmi_evaluate_method(GET_LED_METHOD_ID, arg0, 0, &brightness); + if (err) + return err; + + return brightness; +}; + +static void aaeon_led_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + int err, retval; + struct aaeon_led_data *led = + container_of(cdev, struct aaeon_led_data, cdev); + u32 arg0; + + arg0 = (u32)(led->id & 0xF); + if (brightness != LED_OFF) + arg0 |= BIT(16); + + err = asus_wmi_evaluate_method(SET_LED_METHOD_ID, arg0, 0, &retval); +}; + +static int __init aaeon_add_led_device(struct platform_device *pdev, + int id) +{ + struct aaeon_led_data *led; + + led = devm_kzalloc(&pdev->dev, sizeof(struct aaeon_led_data), GFP_KERNEL); + if (!led) + return -ENOMEM; + + led->id = id; + led->cdev.brightness_get = aaeon_led_brightness_get; + led->cdev.brightness_set = aaeon_led_brightness_set; + led->cdev.name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "led:%d:", id); + + if (!led->cdev.name) + return -ENOMEM; + + return devm_led_classdev_register(&pdev->dev, &led->cdev); +} + +static int aaeon_led_probe(struct platform_device *pdev) +{ + int err = -ENODEV, i; + int led_number = 0; + + pr_debug("aaeon led device probe!\n"); + /* Prevent other drivers adding this platfom device */ + if (!wmi_has_guid(AAEON_WMI_MGMT_GUID)) { + pr_debug("AAEON Management GUID not found\n"); + return -ENODEV; + } + + /* Query the number of led devices board support */ + led_number = aaeon_led_get_number(); + + /* + * If the number is 0 or can't get the number of leds, + * no need to register any led device node. + */ + if (led_number <= 0) + return -ENODEV; + + for (i = 0; i < led_number; i++) { + err = aaeon_add_led_device(pdev, i); + if (err) + break; + } + + return err; +} + +static struct platform_driver aaeon_led_driver = { + .driver = { + .name = "leds-aaeon", + }, +}; + +module_platform_driver_probe(aaeon_led_driver, aaeon_led_probe); + +MODULE_ALIAS("platform:leds-aaeon"); +MODULE_DESCRIPTION("AAEON LED Driver"); +MODULE_AUTHOR("Kunyang Fan "); +MODULE_LICENSE("GPL v2");