From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 905A6C43143 for ; Fri, 22 Jun 2018 08:10:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 482F523EB0 for ; Fri, 22 Jun 2018 08:10:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="j/2RjIxS" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 482F523EB0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754140AbeFVIJ7 (ORCPT ); Fri, 22 Jun 2018 04:09:59 -0400 Received: from mail-pg0-f66.google.com ([74.125.83.66]:38688 "EHLO mail-pg0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751263AbeFVIJy (ORCPT ); Fri, 22 Jun 2018 04:09:54 -0400 Received: by mail-pg0-f66.google.com with SMTP id c9-v6so2634904pgf.5 for ; Fri, 22 Jun 2018 01:09:54 -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=iTLLhdNlaIGY0bI+lB6w+m6AewzVL5yDimWaS8xtwqU=; b=j/2RjIxS3v5mOm83rmN7PDBXzKjbQEmp7vzJq4UD2LP6z6VUwRSys/YWlsskSjS6iE 6czE75yFjifAtG9wUd7R6YIz+Mt2Y+zTNS2NECk7sOl4UfPdw6KFr6HYV8HfXH8VUUqq BVh64Ns9hPu9CwPRAcCTtVwZOYF/i/jepT+4A= 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=iTLLhdNlaIGY0bI+lB6w+m6AewzVL5yDimWaS8xtwqU=; b=gXyKqNyW3cU0JlJh81tlh/GyYSNGHkBjIPYEXZGvhJoT2DwitWUwpjzUAo2fqja711 frTif3wrTeQi+WtDHMTaD8X8l5dLruKXwo0ZfaMAt4qO2iqZnM7pq5Ratv++JulOKWUp ZLfceFfSEAfuyfrqiVLMIcAGQQyMNCCcc4nL342ADOHqnqelZa9Xn8leI/a+1+vIY/Sy N9EGa3pB5uLUvAhkZUPHwQ3uN93crNN/tCW7uQL2EveJJDC4Gzy1Vq1wwRV+ShZbEaH3 2h5+gSykhweC+lIh6mSnIWLYAiyUsxTSKilt5LsvooA4RNKHq815aQ2YHeHe+KOFdlYI 5WWQ== X-Gm-Message-State: APt69E36u95tD0IqrsRO6533BsZJsvypAgRSzssAFBojUPYXRyiDJy2S 3GB4m2oiPV96PtXKRDx1OpyjYA== X-Google-Smtp-Source: ADUXVKKhoOE35wNDhaf/mwBAlZgDPHWJ1GTIXHbiYJUdfQQVHDFVr3OBjnhLpxqhYIdLmmG5WUUP+Q== X-Received: by 2002:a62:ca99:: with SMTP id y25-v6mr623976pfk.187.1529654993821; Fri, 22 Jun 2018 01:09:53 -0700 (PDT) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id i65-v6sm22656131pfd.17.2018.06.22.01.09.51 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 22 Jun 2018 01:09:53 -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 1/8] hwspinlock: Add one new API to support getting a specific hwlock by the name Date: Fri, 22 Jun 2018 16:08:58 +0800 Message-Id: X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 d16e6a3..bea3586 100644 --- a/drivers/hwspinlock/hwspinlock_core.c +++ b/drivers/hwspinlock/hwspinlock_core.c @@ -367,6 +367,35 @@ 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 57537e6..2b6f389 100644 --- a/include/linux/hwspinlock.h +++ b/include/linux/hwspinlock.h @@ -66,6 +66,7 @@ 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 */ @@ -125,6 +126,12 @@ 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 */ /** -- 1.7.9.5