From patchwork Sat Jun 17 11:53:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 695143 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 3846CEB64DA for ; Sun, 18 Jun 2023 19:24:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229553AbjFRTYI (ORCPT ); Sun, 18 Jun 2023 15:24:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229487AbjFRTYH (ORCPT ); Sun, 18 Jun 2023 15:24:07 -0400 Received: from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com [IPv6:2a00:1450:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 31998E44; Sun, 18 Jun 2023 12:24:06 -0700 (PDT) Received: by mail-wr1-x42a.google.com with SMTP id ffacd0b85a97d-311099fac92so3125689f8f.0; Sun, 18 Jun 2023 12:24:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1687116244; x=1689708244; 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=guP6wSLsxzWpfvfaaFfXjzJkT5z7hOXmt03lBFrApjw=; b=Fq8GtGPZKF3ZYJfTaXrx+3L+WsIehDT+wcMtSQFAyh2JT7gXt0J/UOZg3EU/bVH5LM VA/hSNo53/OYkxv1QaDiHqUA8st6F3B68kMWPZaL00eguVoGzMtsp1nCW2ZLM6fUjBfh B7QN/5Mm3hD8cjzr3basqbNj+ejxplm5WxdKjB+ANqD4UEpMhpK2i8bNAUBTFj7XnTJn KwsL6ot9WYVsEFU/KuuJxH1G7zkZ/Af52RARhaEpQ1IlbJH8XCvR6h6kRuGvMGyogmPa fWoA7DbNwAAOv/rcZBF68XrKlAAZf5xkQywEWsZlhabQ0xP343N8rrygBA1K5MT9htA5 HsnQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687116244; x=1689708244; 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=guP6wSLsxzWpfvfaaFfXjzJkT5z7hOXmt03lBFrApjw=; b=Js1Thxq4X69TiJrUzJheeTIpBjmB6sIFIHHDTMmnCM5sBIDWRUHX6AkTTKilVpyOI0 vmtodV7x/54A8OXf7+5AlYHXJPZn6N6PHFt7F++mFgq4MoIataCPjRMAw8/K8HAdNSq6 lScgzntRUuvMabTrHD3vxI2lm8LsfR67yK47GHJYRz81OeHWZMPMTlO6C/eWb+Yd1ma0 OceG/bXkbte30zTyUuxdUtqEmw3faulnNCvLoRayX+ka/fxohLtIQ8iWgL/7Wrnm6Q58 I3WCHV/EYiyv640tqe4e37rtCQENvX2cLgK3ZwYGynZCQ3KrEbjJX/MbkjGUiaUZZDwS gYFQ== X-Gm-Message-State: AC+VfDyZDvHGG+CDu4k1AJCC5PMPzbbxsFRzg+4gKe3xUN95Volt9ocr xgydv1ZciRCcLOUXzUfQBJY= X-Google-Smtp-Source: ACHHUZ52SDcoKvUemgSuCAaLRksZnpdFqYnpirKFe+zt2i0e2qJDm1cWyeayArN+KU/nTLUU/TOsNg== X-Received: by 2002:adf:f203:0:b0:2f9:4fe9:74bb with SMTP id p3-20020adff203000000b002f94fe974bbmr6787496wro.40.1687116244321; Sun, 18 Jun 2023 12:24:04 -0700 (PDT) Received: from localhost.localdomain (93-34-93-173.ip49.fastwebnet.it. [93.34.93.173]) by smtp.googlemail.com with ESMTPSA id h12-20020adffd4c000000b0031130b9b173sm4065871wrs.34.2023.06.18.12.24.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 18 Jun 2023 12:24:04 -0700 (PDT) From: Christian Marangi To: Pavel Machek , Lee Jones , Christian Marangi , Andrew Lunn , "David S. Miller" , Yang Li , linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [net-next PATCH v4 1/3] leds: trigger: netdev: add additional specific link speed mode Date: Sat, 17 Jun 2023 13:53:53 +0200 Message-Id: <20230617115355.22868-2-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230617115355.22868-1-ansuelsmth@gmail.com> References: <20230617115355.22868-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Add additional modes for specific link speed. Use ethtool APIs to get the current link speed and enable the LED accordingly. Under netdev event handler the rtnl lock is already held and is not needed to be set to access ethtool APIs. This is especially useful for PHY and Switch that supports LEDs hw control for specific link speed. (example scenario a PHY that have 2 LED connected one green and one orange where the green is turned on with 1000mbps speed and orange is turned on with 10mpbs speed) On mode set from sysfs we check if we have enabled split link speed mode and reject enabling generic link mode to prevent wrong and redundant configuration. Rework logic on the set baseline state to support these new modes to select if we need to turn on or off the LED. Add additional modes: - link_10: Turn on LED when link speed is 10mbps - link_100: Turn on LED when link speed is 100mbps - link_1000: Turn on LED when link speed is 1000mbps Signed-off-by: Christian Marangi Reviewed-by: Andrew Lunn --- drivers/leds/trigger/ledtrig-netdev.c | 80 +++++++++++++++++++++++---- include/linux/leds.h | 3 + 2 files changed, 73 insertions(+), 10 deletions(-) diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c index c9b040bacbb0..8e6132f069af 100644 --- a/drivers/leds/trigger/ledtrig-netdev.c +++ b/drivers/leds/trigger/ledtrig-netdev.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -21,6 +22,7 @@ #include #include #include +#include #include #include "../leds.h" @@ -52,6 +54,8 @@ struct led_netdev_data { unsigned int last_activity; unsigned long mode; + int link_speed; + bool carrier_link_up; bool hw_control; }; @@ -77,7 +81,24 @@ static void set_baseline_state(struct led_netdev_data *trigger_data) if (!trigger_data->carrier_link_up) { led_set_brightness(led_cdev, LED_OFF); } else { + bool blink_on = false; + if (test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode)) + blink_on = true; + + if (test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) && + trigger_data->link_speed == SPEED_10) + blink_on = true; + + if (test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) && + trigger_data->link_speed == SPEED_100) + blink_on = true; + + if (test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode) && + trigger_data->link_speed == SPEED_1000) + blink_on = true; + + if (blink_on) led_set_brightness(led_cdev, led_cdev->blink_brightness); else @@ -161,6 +182,18 @@ static bool can_hw_control(struct led_netdev_data *trigger_data) return true; } +static void get_device_state(struct led_netdev_data *trigger_data) +{ + struct ethtool_link_ksettings cmd; + + trigger_data->carrier_link_up = netif_carrier_ok(trigger_data->net_dev); + if (!trigger_data->carrier_link_up) + return; + + if (!__ethtool_get_link_ksettings(trigger_data->net_dev, &cmd)) + trigger_data->link_speed = cmd.base.speed; +} + static ssize_t device_name_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -196,8 +229,12 @@ static int set_device_name(struct led_netdev_data *trigger_data, dev_get_by_name(&init_net, trigger_data->device_name); trigger_data->carrier_link_up = false; - if (trigger_data->net_dev != NULL) - trigger_data->carrier_link_up = netif_carrier_ok(trigger_data->net_dev); + trigger_data->link_speed = SPEED_UNKNOWN; + if (trigger_data->net_dev != NULL) { + rtnl_lock(); + get_device_state(trigger_data); + rtnl_unlock(); + } trigger_data->last_activity = 0; @@ -234,6 +271,9 @@ static ssize_t netdev_led_attr_show(struct device *dev, char *buf, switch (attr) { case TRIGGER_NETDEV_LINK: + case TRIGGER_NETDEV_LINK_10: + case TRIGGER_NETDEV_LINK_100: + case TRIGGER_NETDEV_LINK_1000: case TRIGGER_NETDEV_TX: case TRIGGER_NETDEV_RX: bit = attr; @@ -249,7 +289,7 @@ static ssize_t netdev_led_attr_store(struct device *dev, const char *buf, size_t size, enum led_trigger_netdev_modes attr) { struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev); - unsigned long state; + unsigned long state, mode = trigger_data->mode; int ret; int bit; @@ -259,6 +299,9 @@ static ssize_t netdev_led_attr_store(struct device *dev, const char *buf, switch (attr) { case TRIGGER_NETDEV_LINK: + case TRIGGER_NETDEV_LINK_10: + case TRIGGER_NETDEV_LINK_100: + case TRIGGER_NETDEV_LINK_1000: case TRIGGER_NETDEV_TX: case TRIGGER_NETDEV_RX: bit = attr; @@ -267,13 +310,20 @@ static ssize_t netdev_led_attr_store(struct device *dev, const char *buf, return -EINVAL; } - cancel_delayed_work_sync(&trigger_data->work); - if (state) - set_bit(bit, &trigger_data->mode); + set_bit(bit, &mode); else - clear_bit(bit, &trigger_data->mode); + clear_bit(bit, &mode); + + if (test_bit(TRIGGER_NETDEV_LINK, &mode) && + (test_bit(TRIGGER_NETDEV_LINK_10, &mode) || + test_bit(TRIGGER_NETDEV_LINK_100, &mode) || + test_bit(TRIGGER_NETDEV_LINK_1000, &mode))) + return -EINVAL; + + cancel_delayed_work_sync(&trigger_data->work); + trigger_data->mode = mode; trigger_data->hw_control = can_hw_control(trigger_data); set_baseline_state(trigger_data); @@ -295,6 +345,9 @@ static ssize_t netdev_led_attr_store(struct device *dev, const char *buf, static DEVICE_ATTR_RW(trigger_name) DEFINE_NETDEV_TRIGGER(link, TRIGGER_NETDEV_LINK); +DEFINE_NETDEV_TRIGGER(link_10, TRIGGER_NETDEV_LINK_10); +DEFINE_NETDEV_TRIGGER(link_100, TRIGGER_NETDEV_LINK_100); +DEFINE_NETDEV_TRIGGER(link_1000, TRIGGER_NETDEV_LINK_1000); DEFINE_NETDEV_TRIGGER(tx, TRIGGER_NETDEV_TX); DEFINE_NETDEV_TRIGGER(rx, TRIGGER_NETDEV_RX); @@ -338,6 +391,9 @@ static DEVICE_ATTR_RW(interval); static struct attribute *netdev_trig_attrs[] = { &dev_attr_device_name.attr, &dev_attr_link.attr, + &dev_attr_link_10.attr, + &dev_attr_link_100.attr, + &dev_attr_link_1000.attr, &dev_attr_rx.attr, &dev_attr_tx.attr, &dev_attr_interval.attr, @@ -368,9 +424,10 @@ static int netdev_trig_notify(struct notifier_block *nb, mutex_lock(&trigger_data->lock); trigger_data->carrier_link_up = false; + trigger_data->link_speed = SPEED_UNKNOWN; switch (evt) { case NETDEV_CHANGENAME: - trigger_data->carrier_link_up = netif_carrier_ok(dev); + get_device_state(trigger_data); fallthrough; case NETDEV_REGISTER: dev_put(trigger_data->net_dev); @@ -383,7 +440,7 @@ static int netdev_trig_notify(struct notifier_block *nb, break; case NETDEV_UP: case NETDEV_CHANGE: - trigger_data->carrier_link_up = netif_carrier_ok(dev); + get_device_state(trigger_data); break; } @@ -426,7 +483,10 @@ static void netdev_trig_work(struct work_struct *work) if (trigger_data->last_activity != new_activity) { led_stop_software_blink(trigger_data->led_cdev); - invert = test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode); + invert = test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode) || + test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) || + test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) || + test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode); interval = jiffies_to_msecs( atomic_read(&trigger_data->interval)); /* base state is ON (link present) */ diff --git a/include/linux/leds.h b/include/linux/leds.h index 4b3d8bda1fff..39f15b1e772c 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -582,6 +582,9 @@ static inline void *led_get_trigger_data(struct led_classdev *led_cdev) /* Trigger specific enum */ enum led_trigger_netdev_modes { TRIGGER_NETDEV_LINK = 0, + TRIGGER_NETDEV_LINK_10, + TRIGGER_NETDEV_LINK_100, + TRIGGER_NETDEV_LINK_1000, TRIGGER_NETDEV_TX, TRIGGER_NETDEV_RX, From patchwork Sat Jun 17 11:53:54 2023 Content-Type: text/plain; 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[93.34.93.173]) by smtp.googlemail.com with ESMTPSA id h12-20020adffd4c000000b0031130b9b173sm4065871wrs.34.2023.06.18.12.24.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 18 Jun 2023 12:24:04 -0700 (PDT) From: Christian Marangi To: Pavel Machek , Lee Jones , Christian Marangi , Andrew Lunn , "David S. Miller" , Yang Li , linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [net-next PATCH v4 2/3] leds: trigger: netdev: add additional specific link duplex mode Date: Sat, 17 Jun 2023 13:53:54 +0200 Message-Id: <20230617115355.22868-3-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230617115355.22868-1-ansuelsmth@gmail.com> References: <20230617115355.22868-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Add additional modes for specific link duplex. Use ethtool APIs to get the current link duplex and enable the LED accordingly. Under netdev event handler the rtnl lock is already held and is not needed to be set to access ethtool APIs. This is especially useful for PHY and Switch that supports LEDs hw control for specific link duplex. Add additional modes: - half_duplex: Turn on LED when link is half duplex - full_duplex: Turn on LED when link is full duplex Signed-off-by: Christian Marangi Reviewed-by: Andrew Lunn --- drivers/leds/trigger/ledtrig-netdev.c | 27 +++++++++++++++++++++++++-- include/linux/leds.h | 2 ++ 2 files changed, 27 insertions(+), 2 deletions(-) diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c index 8e6132f069af..90b682d49998 100644 --- a/drivers/leds/trigger/ledtrig-netdev.c +++ b/drivers/leds/trigger/ledtrig-netdev.c @@ -55,6 +55,7 @@ struct led_netdev_data { unsigned long mode; int link_speed; + u8 duplex; bool carrier_link_up; bool hw_control; @@ -98,6 +99,14 @@ static void set_baseline_state(struct led_netdev_data *trigger_data) trigger_data->link_speed == SPEED_1000) blink_on = true; + if (test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) && + trigger_data->duplex == DUPLEX_HALF) + blink_on = true; + + if (test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &trigger_data->mode) && + trigger_data->duplex == DUPLEX_FULL) + blink_on = true; + if (blink_on) led_set_brightness(led_cdev, led_cdev->blink_brightness); @@ -190,8 +199,10 @@ static void get_device_state(struct led_netdev_data *trigger_data) if (!trigger_data->carrier_link_up) return; - if (!__ethtool_get_link_ksettings(trigger_data->net_dev, &cmd)) + if (!__ethtool_get_link_ksettings(trigger_data->net_dev, &cmd)) { trigger_data->link_speed = cmd.base.speed; + trigger_data->duplex = cmd.base.duplex; + } } static ssize_t device_name_show(struct device *dev, @@ -230,6 +241,7 @@ static int set_device_name(struct led_netdev_data *trigger_data, trigger_data->carrier_link_up = false; trigger_data->link_speed = SPEED_UNKNOWN; + trigger_data->duplex = DUPLEX_UNKNOWN; if (trigger_data->net_dev != NULL) { rtnl_lock(); get_device_state(trigger_data); @@ -274,6 +286,8 @@ static ssize_t netdev_led_attr_show(struct device *dev, char *buf, case TRIGGER_NETDEV_LINK_10: case TRIGGER_NETDEV_LINK_100: case TRIGGER_NETDEV_LINK_1000: + case TRIGGER_NETDEV_HALF_DUPLEX: + case TRIGGER_NETDEV_FULL_DUPLEX: case TRIGGER_NETDEV_TX: case TRIGGER_NETDEV_RX: bit = attr; @@ -302,6 +316,8 @@ static ssize_t netdev_led_attr_store(struct device *dev, const char *buf, case TRIGGER_NETDEV_LINK_10: case TRIGGER_NETDEV_LINK_100: case TRIGGER_NETDEV_LINK_1000: + case TRIGGER_NETDEV_HALF_DUPLEX: + case TRIGGER_NETDEV_FULL_DUPLEX: case TRIGGER_NETDEV_TX: case TRIGGER_NETDEV_RX: bit = attr; @@ -348,6 +364,8 @@ DEFINE_NETDEV_TRIGGER(link, TRIGGER_NETDEV_LINK); DEFINE_NETDEV_TRIGGER(link_10, TRIGGER_NETDEV_LINK_10); DEFINE_NETDEV_TRIGGER(link_100, TRIGGER_NETDEV_LINK_100); DEFINE_NETDEV_TRIGGER(link_1000, TRIGGER_NETDEV_LINK_1000); +DEFINE_NETDEV_TRIGGER(half_duplex, TRIGGER_NETDEV_HALF_DUPLEX); +DEFINE_NETDEV_TRIGGER(full_duplex, TRIGGER_NETDEV_FULL_DUPLEX); DEFINE_NETDEV_TRIGGER(tx, TRIGGER_NETDEV_TX); DEFINE_NETDEV_TRIGGER(rx, TRIGGER_NETDEV_RX); @@ -394,6 +412,8 @@ static struct attribute *netdev_trig_attrs[] = { &dev_attr_link_10.attr, &dev_attr_link_100.attr, &dev_attr_link_1000.attr, + &dev_attr_full_duplex.attr, + &dev_attr_half_duplex.attr, &dev_attr_rx.attr, &dev_attr_tx.attr, &dev_attr_interval.attr, @@ -425,6 +445,7 @@ static int netdev_trig_notify(struct notifier_block *nb, trigger_data->carrier_link_up = false; trigger_data->link_speed = SPEED_UNKNOWN; + trigger_data->duplex = DUPLEX_UNKNOWN; switch (evt) { case NETDEV_CHANGENAME: get_device_state(trigger_data); @@ -486,7 +507,9 @@ static void netdev_trig_work(struct work_struct *work) invert = test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode) || test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) || test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) || - test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode); + test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode) || + test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) || + test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &trigger_data->mode); interval = jiffies_to_msecs( atomic_read(&trigger_data->interval)); /* base state is ON (link present) */ diff --git a/include/linux/leds.h b/include/linux/leds.h index 39f15b1e772c..7d428100b42b 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -585,6 +585,8 @@ enum led_trigger_netdev_modes { TRIGGER_NETDEV_LINK_10, TRIGGER_NETDEV_LINK_100, TRIGGER_NETDEV_LINK_1000, + TRIGGER_NETDEV_HALF_DUPLEX, + TRIGGER_NETDEV_FULL_DUPLEX, TRIGGER_NETDEV_TX, TRIGGER_NETDEV_RX, From patchwork Sat Jun 17 11:53:55 2023 Content-Type: text/plain; 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[93.34.93.173]) by smtp.googlemail.com with ESMTPSA id h12-20020adffd4c000000b0031130b9b173sm4065871wrs.34.2023.06.18.12.24.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 18 Jun 2023 12:24:05 -0700 (PDT) From: Christian Marangi To: Pavel Machek , Lee Jones , Christian Marangi , Andrew Lunn , "David S. Miller" , Yang Li , linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [net-next PATCH v4 3/3] leds: trigger: netdev: expose hw_control status via sysfs Date: Sat, 17 Jun 2023 13:53:55 +0200 Message-Id: <20230617115355.22868-4-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230617115355.22868-1-ansuelsmth@gmail.com> References: <20230617115355.22868-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Expose hw_control status via sysfs for the netdev trigger to give userspace better understanding of the current state of the trigger and the LED. Signed-off-by: Christian Marangi --- drivers/leds/trigger/ledtrig-netdev.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c index 90b682d49998..a550a1895642 100644 --- a/drivers/leds/trigger/ledtrig-netdev.c +++ b/drivers/leds/trigger/ledtrig-netdev.c @@ -406,6 +406,16 @@ static ssize_t interval_store(struct device *dev, static DEVICE_ATTR_RW(interval); +static ssize_t hw_control_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev); + + return sprintf(buf, "%d\n", trigger_data->hw_control); +} + +static DEVICE_ATTR_RO(hw_control); + static struct attribute *netdev_trig_attrs[] = { &dev_attr_device_name.attr, &dev_attr_link.attr, @@ -417,6 +427,7 @@ static struct attribute *netdev_trig_attrs[] = { &dev_attr_rx.attr, &dev_attr_tx.attr, &dev_attr_interval.attr, + &dev_attr_hw_control.attr, NULL }; ATTRIBUTE_GROUPS(netdev_trig);