Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754836AbcDMSIm (ORCPT ); Wed, 13 Apr 2016 14:08:42 -0400 Received: from mail-qg0-f52.google.com ([209.85.192.52]:34610 "EHLO mail-qg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754211AbcDMSIi (ORCPT ); Wed, 13 Apr 2016 14:08:38 -0400 From: Ezequiel Garcia To: , , , Cc: Richard Purdie , Jacek Anaszewski , Kumar Gala , Ian Campbell , Mark Rutland , Pawel Moll , Rob Herring , Ezequiel Garcia Subject: [PATCH v2 0/3] Extend the LED panic trigger Date: Wed, 13 Apr 2016 15:08:16 -0300 Message-Id: <1460570899-24642-1-git-send-email-ezequiel@vanguardiasur.com.ar> X-Mailer: git-send-email 2.7.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1548 Lines: 42 As per commit 916fe619951f ("leds: trigger: Introduce a kernel panic LED trigger"), the kernel now supports a new LED trigger to hook on the panic blink. However, the only way of using this is to dedicate a LED device to this function. To overcome this limitation, the present series introduces the capability to switch the LED trigger of certain LED devices upon a kernel panic (using the panic notifier). The decision of which LEDs should be switched to the panic trigger is left to each LED device driver. As an example, a devicetree boolean property is introduced and used in the leds-gpio driver. Feedback and other ideas on how to implement this are most welcomed. Changes from v1: * Dropped the led_trigger_event_nosleep API, and instead just clear the blink_delay_{on, off} when the panic is notified. This results in less changes. * Changed the flag to LED_PANIC_INDICATOR, as requested by Jacek. * Changed the firmware property name to "panic-indicator", as requested by Jacek. Ezequiel Garcia (3): leds: triggers: Allow to switch the trigger to "panic" on a kernel panic devicetree: leds: Introduce "panic-indicator" optional property leds: gpio: Support the "panic-indicator" firmware property Documentation/devicetree/bindings/leds/common.txt | 3 ++ drivers/leds/led-triggers.c | 57 +++++++++++++++++++++++ drivers/leds/leds-gpio.c | 4 ++ include/linux/leds.h | 2 + 4 files changed, 66 insertions(+) -- 2.7.0