Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933838AbcDLMdQ (ORCPT ); Tue, 12 Apr 2016 08:33:16 -0400 Received: from mail-wm0-f68.google.com ([74.125.82.68]:35453 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933800AbcDLMdG (ORCPT ); Tue, 12 Apr 2016 08:33:06 -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 v8 4/7] mfd: cros_ec: Add cros_ec_get_host_event Date: Tue, 12 Apr 2016 14:32:27 +0200 Message-Id: <1460464350-30414-5-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1460464350-30414-1-git-send-email-tomeu.vizoso@collabora.com> References: <1460464350-30414-1-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: 2285 Lines: 74 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 v8: - Remove unnecessary variable host_event Changes in v7: None Changes in v6: - Return 0 if the EC doesn't support MKBP, as expected by callers. Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None drivers/platform/chrome/cros_ec_proto.c | 20 ++++++++++++++++++++ include/linux/mfd/cros_ec.h | 9 +++++++++ 2 files changed, 29 insertions(+) diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index f9677747cb3e..da4188eecea4 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -487,3 +487,23 @@ 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) +{ + if (!ec_dev->mkbp_event_supported) { + dev_warn(ec_dev->dev, + "This EC does not support EC_MKBP_EVENT_HOST_EVENT"); + return 0; + } + + if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT) + return 0; + + if (ec_dev->event_size != sizeof(ec_dev->event_data.data.host_event)) { + dev_warn(ec_dev->dev, "Invalid host event size\n"); + return 0; + } + + return get_unaligned_le32(&ec_dev->event_data.data.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 5d965aff5065..a39ed030d34f 100644 --- a/include/linux/mfd/cros_ec.h +++ b/include/linux/mfd/cros_ec.h @@ -288,6 +288,15 @@ 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. + * + * @ec_dev: Device to fetch event from + * + * Returns: event mask of the event that caused the last interrupt to be raised + */ +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; -- 2.5.5