Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754710Ab2HZMxt (ORCPT ); Sun, 26 Aug 2012 08:53:49 -0400 Received: from smtprelay-b21.telenor.se ([195.54.99.212]:47386 "EHLO smtprelay-b21.telenor.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751978Ab2HZMxq (ORCPT ); Sun, 26 Aug 2012 08:53:46 -0400 X-SENDER-IP: [85.230.170.20] X-LISTENER: [smtp.bredband.net] X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApRZALMbOlBV5qoUPGdsb2JhbABFhRqFI7AtGQEBAQEeGQ0ngiEBBScvEwEPEAhJOQoUBgESiBG7SRSSBQObQI0P X-IronPort-AV: E=Sophos;i="4.77,830,1336341600"; d="scan'208";a="180869248" From: "Henrik Rydberg" To: Dmitry Torokhov , Jiri Kosina Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Henrik Rydberg Subject: [PATCH 12/20] Input: MT - Add slot assignment by id Date: Sun, 26 Aug 2012 14:57:30 +0200 Message-Id: <1345985858-445-13-git-send-email-rydberg@euromail.se> X-Mailer: git-send-email 1.7.12 In-Reply-To: <1345985858-445-1-git-send-email-rydberg@euromail.se> References: <1345985858-445-1-git-send-email-rydberg@euromail.se> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2040 Lines: 66 Some drivers produce their own tracking ids, which needs to be mapped to slots. This patch provides that function. Signed-off-by: Henrik Rydberg --- drivers/input/input-mt.c | 30 ++++++++++++++++++++++++++++++ include/linux/input/mt.h | 2 ++ 2 files changed, 32 insertions(+) diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c index effea9b..a485014 100644 --- a/drivers/input/input-mt.c +++ b/drivers/input/input-mt.c @@ -383,3 +383,33 @@ int input_mt_assign_slots(struct input_dev *dev, int *slots, return 0; } EXPORT_SYMBOL(input_mt_assign_slots); + +/** + * input_mt_assign_slot_by_id() - return matching slot + * @dev: input device with allocated MT slots + * @id: the sought tracking id + * + * Returns the slot of the given tracking id, if it exists. Otherwise, + * the first unused slot is returned. + * + * If no available slot can be found, -1 is returned. + */ +int input_mt_assign_slot_by_id(struct input_dev *dev, int id) +{ + struct input_mt *mt = dev->mt; + struct input_mt_slot *s; + + if (!mt) + return -1; + + for (s = mt->slots; s != mt->slots + mt->num_slots; s++) + if (input_mt_get_value(s, ABS_MT_TRACKING_ID) == id) + return s - mt->slots; + + for (s = mt->slots; s != mt->slots + mt->num_slots; s++) + if (!input_mt_is_active(s)) + return s - mt->slots; + + return -1; +} +EXPORT_SYMBOL(input_mt_assign_slot_by_id); diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h index 10bb77c..54b640b 100644 --- a/include/linux/input/mt.h +++ b/include/linux/input/mt.h @@ -109,4 +109,6 @@ struct input_mt_pos { int input_mt_assign_slots(struct input_dev *dev, int *slots, const struct input_mt_pos *pos, int num_pos); +int input_mt_assign_slot_by_id(struct input_dev *dev, int id); + #endif -- 1.7.12 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/