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[194.187.74.233]) by smtp.gmail.com with ESMTPSA id e15-20020a50e44f000000b0042617ba63c7sm877949edm.81.2022.05.05.06.55.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 May 2022 06:55:35 -0700 (PDT) From: =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= To: Rob Herring , Krzysztof Kozlowski Cc: Pavel Machek , "David S . Miller" , Jakub Kicinski , Paolo Abeni , Florian Fainelli , Hauke Mehrtens , Jacek Anaszewski , devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-leds@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, ansuelsmth@gmail.com, andrew@lunn.ch, vivien.didelot@gmail.com, Vladimir Oltean , Jonathan Corbet , John Crispin , linux-doc@vger.kernel.org, =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= Subject: [PATCH RESEND PoC] leds: trigger: netdev: support DT "trigger-sources" property Date: Thu, 5 May 2022 15:55:12 +0200 Message-Id: <20220505135512.3486-6-zajec5@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220505135512.3486-1-zajec5@gmail.com> References: <20220505135512.3486-1-zajec5@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org From: Rafał Miłecki Parse "trigger-sources", find referenced netdev & use it as default trigger source. Signed-off-by: Rafał Miłecki --- This is a proof on concept, please don't apply this patch. I'll rework this on top of Ansuel's netdev trigger refactoring once it gets accepted ---- drivers/leds/trigger/ledtrig-netdev.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c index d5e774d83021..c036a3671773 100644 --- a/drivers/leds/trigger/ledtrig-netdev.c +++ b/drivers/leds/trigger/ledtrig-netdev.c @@ -20,6 +20,8 @@ #include #include #include +#include +#include #include #include #include "../leds.h" @@ -389,6 +391,28 @@ static void netdev_trig_work(struct work_struct *work) (atomic_read(&trigger_data->interval)*2)); } +static void netdev_trig_of_init(struct led_classdev *led_cdev) +{ + struct device *dev = led_cdev->dev; + struct device_node *np = dev->of_node; + struct of_phandle_args args; + struct net_device *netdev; + int err; + + err = of_parse_phandle_with_args(np, "trigger-sources", "#trigger-source-cells", 0, &args); + if (err || WARN_ON(!args.np)) { + dev_err(dev, "Failed to get trigger source phandle: %d\n", err); + return; + } + + netdev = of_find_net_device_by_node(args.np); + if (netdev) { + device_name_store(dev, NULL, netdev->name, strlen(netdev->name) + 1); + } + + of_node_put(args.np); +} + static int netdev_trig_activate(struct led_classdev *led_cdev) { struct led_netdev_data *trigger_data; @@ -415,6 +439,8 @@ static int netdev_trig_activate(struct led_classdev *led_cdev) led_set_trigger_data(led_cdev, trigger_data); + netdev_trig_of_init(led_cdev); + rc = register_netdevice_notifier(&trigger_data->notifier); if (rc) kfree(trigger_data);