Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934628AbcCNPp5 (ORCPT ); Mon, 14 Mar 2016 11:45:57 -0400 Received: from mail-wm0-f67.google.com ([74.125.82.67]:33222 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934556AbcCNPpp (ORCPT ); Mon, 14 Mar 2016 11:45:45 -0400 From: Tomeu Vizoso To: linux-kernel@vger.kernel.org Cc: Sameer Nanda , Javier Martinez Canillas , Lee Jones , Benson Leung , =?UTF-8?q?Enric=20Balletb=C3=B2?= , Vic Yang , Stephen Boyd , Vincent Palatin , Randall Spangler , Todd Broch , Gwendal Grignou , Tomeu Vizoso , Olof Johansson Subject: [PATCH v5 3/6] mfd: cros_ec: Add cros_ec_get_host_event Date: Mon, 14 Mar 2016 16:44:58 +0100 Message-Id: <1457970301-24616-4-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1457970301-24616-1-git-send-email-tomeu.vizoso@collabora.com> References: <1457970301-24616-1-git-send-email-tomeu.vizoso@collabora.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2200 Lines: 71 This function returns the code for the host event that triggered the interrupt that is being currently handled. Is to be used by observers of the event_notifier in the EC device. Signed-off-by: Tomeu Vizoso --- Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None drivers/platform/chrome/cros_ec_proto.c | 23 +++++++++++++++++++++++ include/linux/mfd/cros_ec.h | 10 ++++++++++ 2 files changed, 33 insertions(+) diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index aaccdde1c9d5..97c287cfd0c0 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -486,3 +486,26 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, return ret; } EXPORT_SYMBOL(cros_ec_cmd_xfer_status); + +u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev) +{ + u32 host_event; + + if (!ec_dev->mkbp_event_supported) { + dev_warn(ec_dev->dev, + "This EC does not support EC_MKBP_EVENT_HOST_EVENT"); + return -EPROTONOSUPPORT; + } + + if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT) + return 0; + + if (ec_dev->event_size != sizeof(host_event)) { + dev_warn(ec_dev->dev, "Invalid host event size\n"); + return 0; + } + + host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event); + return host_event; +} +EXPORT_SYMBOL(cros_ec_get_host_event); diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h index b6961c717209..1ef98d41870b 100644 --- a/include/linux/mfd/cros_ec.h +++ b/include/linux/mfd/cros_ec.h @@ -304,6 +304,16 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev); */ int cros_ec_get_next_event(struct cros_ec_device *ec_dev); +/** + * cros_ec_get_host_event - Return a mask of event set by the EC. + * + * Returns the mask of the event that caused the last interrupt to be raised. + * + * @ec_dev: Device to fetch event from + * @return event mask, 0 on error + */ +uint32_t cros_ec_get_host_event(struct cros_ec_device *ec_dev); + /* sysfs stuff */ extern struct attribute_group cros_ec_attr_group; extern struct attribute_group cros_ec_lightbar_attr_group; -- 2.5.0