From patchwork Wed Oct 26 14:57:55 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antoine Tenart X-Patchwork-Id: 9397423 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9AAEC60236 for ; Wed, 26 Oct 2016 15:00:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7971D29AFF for ; Wed, 26 Oct 2016 15:00:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6E4FE29C04; Wed, 26 Oct 2016 15:00:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1E8C929BF0 for ; Wed, 26 Oct 2016 15:00:18 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bzPfE-0005Hs-GR; Wed, 26 Oct 2016 14:58:48 +0000 Received: from up.free-electrons.com ([163.172.77.33] helo=mail.free-electrons.com) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bzPer-00052A-Cz for linux-arm-kernel@lists.infradead.org; Wed, 26 Oct 2016 14:58:29 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id 07D6620C61; Wed, 26 Oct 2016 16:58:01 +0200 (CEST) Received: from localhost (unknown [163.172.35.26]) by mail.free-electrons.com (Postfix) with ESMTPSA id D57B520790; Wed, 26 Oct 2016 16:58:00 +0200 (CEST) From: Antoine Tenart To: maxime.ripard@free-electrons.com, pantelis.antoniou@konsulko.com, mark.rutland@arm.com, sboyd@codeaurora.org Subject: [RFC PATCH 4/5] w1: add a callback to call slave when a new device is connected Date: Wed, 26 Oct 2016 16:57:55 +0200 Message-Id: <20161026145756.21689-5-antoine.tenart@free-electrons.com> X-Mailer: git-send-email 2.10.1 In-Reply-To: <20161026145756.21689-1-antoine.tenart@free-electrons.com> References: <20161026145756.21689-1-antoine.tenart@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161026_075825_725232_2623D7A2 X-CRM114-Status: GOOD ( 12.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thomas.petazzoni@free-electrons.com, devicetree@vger.kernel.org, Antoine Tenart , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds the possibility for slave drivers to register a callback, to be called whenever a new device matching the slave ID is connected. Signed-off-by: Antoine Tenart --- drivers/w1/w1.c | 10 ++++++++++ drivers/w1/w1_family.h | 2 ++ 2 files changed, 12 insertions(+) diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 80d0cc4e6e7f..7010ffd1ea93 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -659,6 +659,16 @@ static int w1_family_notify(unsigned long action, struct w1_slave *sl) return err; } } + if (fops->callback) { + err = fops->callback(sl); + /* + * Do not return an error as the slave driver correctly + * probed. + */ + if (err) + dev_err(&sl->dev, + "callback call failed. err=%d\n", err); + } break; case BUS_NOTIFY_DEL_DEVICE: diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h index 10a7a0767187..5e165babc6f3 100644 --- a/drivers/w1/w1_family.h +++ b/drivers/w1/w1_family.h @@ -55,11 +55,13 @@ struct w1_slave; * @add_slave: add_slave * @remove_slave: remove_slave * @groups: sysfs group + * @callback: called when a new device is discovered */ struct w1_family_ops { int (* add_slave)(struct w1_slave *); void (* remove_slave)(struct w1_slave *); + int (* callback)(struct w1_slave *); const struct attribute_group **groups; };