From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rajat Jain Subject: [PATCH] input: cros_ec_keyb: Add an EC event for sysrq Date: Thu, 30 Mar 2017 15:18:07 -0700 Message-ID: <20170330221807.2983-1-rajatja@google.com> Return-path: Received: from mail-pg0-f41.google.com ([74.125.83.41]:34758 "EHLO mail-pg0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750903AbdC3WS2 (ORCPT ); Thu, 30 Mar 2017 18:18:28 -0400 Received: by mail-pg0-f41.google.com with SMTP id 21so51823100pgg.1 for ; Thu, 30 Mar 2017 15:18:27 -0700 (PDT) Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Dmitry Torokhov , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lee Jones , rajatxjain@gmail.com, dtor@google.com, Rajat Jain Some form factors (detachables / tablets) may not have a keyboard and thus user may have to resort to using a defined EC UI to send sysrq(s) to the kernel in order to collect crash info etc. This UI typically is in the form of user pressing volume / power buttons in some specific sequence and for some specific time. Add a new EC event that allows EC to communicate the sysrq to the AP. (We're skipping event number 5 because it has been reserved for something else) Signed-off-by: Rajat Jain --- drivers/input/keyboard/cros_ec_keyb.c | 7 +++++++ include/linux/mfd/cros_ec_commands.h | 4 ++++ 2 files changed, 11 insertions(+) diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c index 6a250d65f8fe..00a3a830cd3a 100644 --- a/drivers/input/keyboard/cros_ec_keyb.c +++ b/drivers/input/keyboard/cros_ec_keyb.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include #include @@ -260,6 +261,12 @@ static int cros_ec_keyb_work(struct notifier_block *nb, ckdev->ec->event_size); break; + case EC_MKBP_EVENT_SYSRQ: + val = get_unaligned_le32(&ckdev->ec->event_data.data.sysrq); + dev_dbg(ckdev->dev, "sysrq code from EC : %#x\n", val); + handle_sysrq(val); + break; + case EC_MKBP_EVENT_BUTTON: case EC_MKBP_EVENT_SWITCH: /* diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h index f1ef6388c233..c93e7e0300ef 100644 --- a/include/linux/mfd/cros_ec_commands.h +++ b/include/linux/mfd/cros_ec_commands.h @@ -2041,6 +2041,9 @@ enum ec_mkbp_event { /* The state of the switches have changed. */ EC_MKBP_EVENT_SWITCH = 4, + /* EC sent a sysrq command */ + EC_MKBP_EVENT_SYSRQ = 6, + /* Number of MKBP events */ EC_MKBP_EVENT_COUNT, }; @@ -2053,6 +2056,7 @@ union ec_response_get_next_data { uint32_t buttons; uint32_t switches; + uint32_t sysrq; } __packed; struct ec_response_get_next_event { -- 2.12.2.564.g063fe858b8-goog