From patchwork Fri Jun 1 09:04:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "(Exiting) Baolin Wang" X-Patchwork-Id: 10442801 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 9758A602BD for ; Fri, 1 Jun 2018 09:06:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8B3AE27BA5 for ; Fri, 1 Jun 2018 09:06:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7F46428C1D; Fri, 1 Jun 2018 09:06:38 +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=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 28A0327BA5 for ; Fri, 1 Jun 2018 09:06:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751091AbeFAJF5 (ORCPT ); Fri, 1 Jun 2018 05:05:57 -0400 Received: from mail-pg0-f68.google.com ([74.125.83.68]:43630 "EHLO mail-pg0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750844AbeFAJFt (ORCPT ); Fri, 1 Jun 2018 05:05:49 -0400 Received: by mail-pg0-f68.google.com with SMTP id p8-v6so10979528pgq.10 for ; Fri, 01 Jun 2018 02:05:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id; bh=1lXVCiBKqpsJgxB7Vp47gLA9OXi6CS54txe0RIlLh9k=; b=Es2/RhTTKB5hzppdA83ceOLQJV7b+QLgU/5L7TaLRTPh41lYXVcB/NU00kwOHb0hiX f1s17liOKIWMe9kpV9MsLP/MKCh5AQsMLJZROtdL9ERm7MPZaxHZgwXoOoU0oqVbyqNA qA7b5lEKOGVMfTWKJXGwVSjc4eCZcgd78skks= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=1lXVCiBKqpsJgxB7Vp47gLA9OXi6CS54txe0RIlLh9k=; b=mgUqE+1phNMkCqnvbbeCkUCK9E/4SjqzsZfdqV+SkUDk1LuBT7yAz1f3mG9Q+6rUHG x28r/2YcRNuzt4Pwp1C15g+/Psh883JwZJKJ0lYtjSzfYmNe1UIJrkiQ/MsUZ9mo5t0U i2M2zpGdXCqk+kQVkfhpYkf1OX4gvgMGbLT4cdCOReb3AgaA7Tgc5QbAWBYPQkf0utmS hv6phOTQVqk6oroGuAW670/Wih6XAeaeIOGUgFShiIf/lYSBCdBkeLAXzHpgsKuBuQuf K1evlxG1ljEpWZMpWKFF9vzHenAzv2XHLPdNcPdBPRc4sLQCMYgqiBcdNf5CoVtHMFvF +rgQ== X-Gm-Message-State: ALKqPwd4u4sxzBx+JSbBxFnVz3O/P7KnEc+rLYRyWLIlpWdIQyZ8aFfj Xv61iDvhwgiOHlzFEmEcB6cJxg== X-Google-Smtp-Source: ADUXVKJnSHm4Tqn1yBRveHsBj6UbywRBVq/QFr4XoBLfzi8FJ40RaEsNeIfd9ELY+jYHPW0rAbXb7A== X-Received: by 2002:a65:4bcd:: with SMTP id p13-v6mr8251015pgr.114.1527843948833; Fri, 01 Jun 2018 02:05:48 -0700 (PDT) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id a4-v6sm89505351pfj.19.2018.06.01.02.05.45 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 01 Jun 2018 02:05:48 -0700 (PDT) From: Baolin Wang To: ohad@wizery.com, bjorn.andersson@linaro.org, broonie@kernel.org Cc: baolin.wang@linaro.org, linux-spi@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/4] hwspinlock: Add one new API to support getting a specific hwlock by the name Date: Fri, 1 Jun 2018 17:04:52 +0800 Message-Id: <1be6adeb558fada77de79a40cd5ef7dc2719c945.1527843425.git.baolin.wang@linaro.org> X-Mailer: git-send-email 1.7.9.5 Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The hardware spinlock binding already supplied the 'hwlock-names' property to match and get a specific hwlock, but did not supply one API for users to get a specific hwlock by the hwlock name. So this patch introduces one API to support this requirement. Signed-off-by: Baolin Wang --- drivers/hwspinlock/hwspinlock_core.c | 29 +++++++++++++++++++++++++++++ include/linux/hwspinlock.h | 7 +++++++ 2 files changed, 36 insertions(+) diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c index 5278d05..00bde06 100644 --- a/drivers/hwspinlock/hwspinlock_core.c +++ b/drivers/hwspinlock/hwspinlock_core.c @@ -375,6 +375,35 @@ int of_hwspin_lock_get_id(struct device_node *np, int index) } EXPORT_SYMBOL_GPL(of_hwspin_lock_get_id); +/** + * of_hwspin_lock_get_id_byname() - get lock id for an specified hwlock name + * @np: device node from which to request the specific hwlock + * @name: hwlock name + * + * This function provides a means for DT users of the hwspinlock module to + * get the global lock id of a specific hwspinlock using the specified name of + * the hwspinlock device, so that it can be requested using the normal + * hwspin_lock_request_specific() API. + * + * Returns the global lock id number on success, -EPROBE_DEFER if the hwspinlock + * device is not yet registered, -EINVAL on invalid args specifier value or an + * appropriate error as returned from the OF parsing of the DT client node. + */ +int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name) +{ + int index; + + if (!name) + return -EINVAL; + + index = of_property_match_string(np, "hwlock-names", name); + if (index < 0) + return index; + + return of_hwspin_lock_get_id(np, index); +} +EXPORT_SYMBOL_GPL(of_hwspin_lock_get_id_byname); + static int hwspin_lock_register_single(struct hwspinlock *hwlock, int id) { struct hwspinlock *tmp; diff --git a/include/linux/hwspinlock.h b/include/linux/hwspinlock.h index fe450ee..f165cc8 100644 --- a/include/linux/hwspinlock.h +++ b/include/linux/hwspinlock.h @@ -74,6 +74,7 @@ int __hwspin_lock_timeout(struct hwspinlock *, unsigned int, int, unsigned long *); int __hwspin_trylock(struct hwspinlock *, int, unsigned long *); void __hwspin_unlock(struct hwspinlock *, int, unsigned long *); +int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name); #else /* !CONFIG_HWSPINLOCK */ @@ -133,6 +134,12 @@ static inline int hwspin_lock_get_id(struct hwspinlock *hwlock) return 0; } +static inline +int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name) +{ + return 0; +} + #endif /* !CONFIG_HWSPINLOCK */ /**