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 25C02C7EE33 for ; Thu, 25 May 2023 14:55:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241729AbjEYOzX (ORCPT ); Thu, 25 May 2023 10:55:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38018 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241691AbjEYOzU (ORCPT ); Thu, 25 May 2023 10:55:20 -0400 Received: from mail-wr1-x42b.google.com (mail-wr1-x42b.google.com [IPv6:2a00:1450:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDFE91AC; Thu, 25 May 2023 07:55:01 -0700 (PDT) Received: by mail-wr1-x42b.google.com with SMTP id ffacd0b85a97d-3094910b150so2177604f8f.0; Thu, 25 May 2023 07:55:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1685026500; x=1687618500; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=duk7D4T1VAqrdSK3J+2RtTub/SxkfwJR2fWIQ5D7Ni0=; b=L4RmAw3XRXnmmRpYDcP8hy1SU0hm5E0T2muMkL0ByGYoY8SHDyIfOLB+Au7OBORQJr 3Z4zb7bIbJvLZuk4ChKWLOd/szhiTwiAMAYDcopAepffd7L6lesv/jSHhL20IlGC0CO7 vliPhSZLxQy0CiaNwXDbWIidJ+z5fSAQ5WKxOl58KX/d2cgt0r7Kni0AmBIGyoU9Mpnd DRxmRLlsoF0zQvFAuMuqv2G+i9PWl4NNbnkvJFomq85mvr6h5sLlXRa+wN3KKlExP2NS mIajra2wE0vTaxSEjr4GiR/qbABuvoxuACJnhPdR5S28umVt3qGduQ5dlPypfjL9FRAw ZVkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685026500; x=1687618500; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=duk7D4T1VAqrdSK3J+2RtTub/SxkfwJR2fWIQ5D7Ni0=; b=hTR32unKk6UyJD+SR6KGsv+L7L8VK1APrOVssVDJUBTYpeVnfRjCphxlOMoAd45/qO UliAl4adjGOgHRVHdD1L8Oq0BXYJLniA+6au3h4d5qVh4Qcu+8CE6aamE636+sGRZ1+N 62DTwKfSM0ZkgDAh02US/OsHNJSzOrsgLgb2P48A4x8RCj0CsQHth+K0DZP7LRq4HdW3 IWea1q19XQQUgjAaAAi6vuC+LNCvKwvqAr34EaqDSaQ28/MfaDsas29lWqGGoxRe80Ux 54BXPkfcV1F3r0yKwk9S198DEb3Ua9EZMBn2hygrIcQ+F2O6fxUBQe62oEPGYcNvIwq5 aNNQ== X-Gm-Message-State: AC+VfDzo8ncaNws9qAp0jU9Muo8pcN4Mqvjap1n9l5Rn3rJhh/faEe6t hyW0aSK8/ivfgN6i2SwgSAc= X-Google-Smtp-Source: ACHHUZ63aC3p/Y9apeYCYpX+JXDoCoMpXpET+sAt7Kk9dDl7t0U8Erz0Z3Itk3eq6QnvoMYpGnMVXA== X-Received: by 2002:a5d:4952:0:b0:307:8126:5e30 with SMTP id r18-20020a5d4952000000b0030781265e30mr2428897wrs.38.1685026499900; Thu, 25 May 2023 07:54:59 -0700 (PDT) Received: from localhost.localdomain (93-34-93-173.ip49.fastwebnet.it. [93.34.93.173]) by smtp.googlemail.com with ESMTPSA id t11-20020a5d49cb000000b0030732d6e104sm2048043wrs.105.2023.05.25.07.54.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 May 2023 07:54:59 -0700 (PDT) From: Christian Marangi To: Pavel Machek , Lee Jones , Jonathan Corbet , Andrew Lunn , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Christian Marangi , linux-leds@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [net-next PATCH v2 08/13] leds: trigger: netdev: add support for LED hw control Date: Thu, 25 May 2023 16:53:56 +0200 Message-Id: <20230525145401.27007-9-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230525145401.27007-1-ansuelsmth@gmail.com> References: <20230525145401.27007-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Add support for LED hw control for the netdev trigger. The trigger on calling set_baseline_state to configure a new mode, will do various check to verify if hw control can be used for the requested mode in can_hw_control() function. It will first check if the LED driver supports hw control for the netdev trigger, then will use hw_control_is_supported() and finally will call hw_control_set() to apply the requested mode. To use such mode, interval MUST be set to the default value and net_dev MUST be set. If one of these 2 value are not valid, hw control will never be used and normal software fallback is used. Signed-off-by: Christian Marangi --- drivers/leds/trigger/ledtrig-netdev.c | 39 ++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c index cb2ec33abc4e..8d6381415208 100644 --- a/drivers/leds/trigger/ledtrig-netdev.c +++ b/drivers/leds/trigger/ledtrig-netdev.c @@ -68,6 +68,13 @@ static void set_baseline_state(struct led_netdev_data *trigger_data) int current_brightness; struct led_classdev *led_cdev = trigger_data->led_cdev; + /* Already validated, hw control is possible with the requested mode */ + if (trigger_data->hw_control) { + led_cdev->hw_control_set(led_cdev, trigger_data->mode); + + return; + } + current_brightness = led_cdev->brightness; if (current_brightness) led_cdev->blink_brightness = current_brightness; @@ -103,12 +110,42 @@ static bool supports_hw_control(struct led_classdev *led_cdev) static bool can_hw_control(struct led_netdev_data *trigger_data) { + unsigned int interval = atomic_read(&trigger_data->interval); struct led_classdev *led_cdev = trigger_data->led_cdev; + unsigned long default_interval = msecs_to_jiffies(50); + int ret; if (!supports_hw_control(led_cdev)) return false; - return false; + /* + * Interval must be set to the default + * value. Any different value is rejected if in hw + * control. + */ + if (interval != default_interval) + return false; + + /* + * net_dev must be set with hw control, otherwise no + * blinking can be happening and there is nothing to + * offloaded. + */ + if (!trigger_data->net_dev) + return false; + + /* Check if the requested mode is supported */ + ret = led_cdev->hw_control_is_supported(led_cdev, trigger_data->mode); + /* Fall back to software blinking if not supported */ + if (ret == -EOPNOTSUPP) + return false; + if (ret) { + dev_warn(led_cdev->dev, + "Current mode check failed with error %d\n", ret); + return false; + } + + return true; } static ssize_t device_name_show(struct device *dev, -- 2.39.2