From patchwork Mon Jan 27 20:03:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sibi Sankar X-Patchwork-Id: 11353205 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B3955924 for ; Mon, 27 Jan 2020 20:04:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 87FE124681 for ; Mon, 27 Jan 2020 20:04:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="f5vWoAap" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727306AbgA0UEy (ORCPT ); Mon, 27 Jan 2020 15:04:54 -0500 Received: from mail26.static.mailgun.info ([104.130.122.26]:10243 "EHLO mail26.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727307AbgA0UEy (ORCPT ); Mon, 27 Jan 2020 15:04:54 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1580155493; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=3kgeoLZd2Ff+NKwY5h0VmurEmZp7SbDVSmBUbxlhE/s=; b=f5vWoAapSdtDz4tY+cmvR23mdELNaOaxuF585EeCIqSk9GqPBlpVTxgmqXTF8/5sY3tQUCaV Mx8IsCpuxSmIlVgrYNnn/iyQQ6HbGwFpmVeTJ2ips0IrFqLTG474JRj48OeS8bzdIAIDNvTq 5jbWSoO8hrhdjMgymTT2Jaz9GCs= X-Mailgun-Sending-Ip: 104.130.122.26 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e2f425f.7feba2a79960-smtp-out-n02; Mon, 27 Jan 2020 20:04:47 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 6DDCBC447A4; Mon, 27 Jan 2020 20:04:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from blr-ubuntu-87.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: sibis) by smtp.codeaurora.org (Postfix) with ESMTPSA id 515A3C43383; Mon, 27 Jan 2020 20:04:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 515A3C43383 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=sibis@codeaurora.org From: Sibi Sankar To: viresh.kumar@linaro.org, sboyd@kernel.org, georgi.djakov@linaro.org, saravanak@google.com Cc: nm@ti.com, bjorn.andersson@linaro.org, agross@kernel.org, david.brown@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, rjw@rjwysocki.net, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dianders@chromium.org, mka@chromium.org, vincent.guittot@linaro.org, amit.kucheria@linaro.org, ulf.hansson@linaro.org, Sibi Sankar Subject: [RFC v3 06/10] opp: Allow multiple opp_tables to be mapped to a single device Date: Tue, 28 Jan 2020 01:33:46 +0530 Message-Id: <20200127200350.24465-7-sibis@codeaurora.org> X-Mailer: git-send-email 2.22.1 In-Reply-To: <20200127200350.24465-1-sibis@codeaurora.org> References: <20200127200350.24465-1-sibis@codeaurora.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Introduce _find_opp_table_indexed and its unlocked variant to allow for multiple distinct opp_tables to be linked to a single device. Signed-off-by: Sibi Sankar --- drivers/opp/core.c | 41 +++++++++++++++++++++++++++++++++-------- 1 file changed, 33 insertions(+), 8 deletions(-) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index f241e83ec926a..e9d633c9e40b1 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -46,19 +46,26 @@ static struct opp_device *_find_opp_dev(const struct device *dev, return NULL; } -static struct opp_table *_find_opp_table_unlocked(struct device *dev) +static struct opp_table *_find_opp_table_indexed_unlocked(struct device *dev, + int index) { struct opp_table *opp_table; + struct device_node *np; bool found; + np = _opp_of_get_opp_desc_node(dev->of_node, index); + of_node_put(np); + list_for_each_entry(opp_table, &opp_tables, node) { mutex_lock(&opp_table->lock); found = !!_find_opp_dev(dev, opp_table); mutex_unlock(&opp_table->lock); if (found) { - _get_opp_table_kref(opp_table); + if (np && opp_table->np != np) + continue; + _get_opp_table_kref(opp_table); return opp_table; } } @@ -67,17 +74,19 @@ static struct opp_table *_find_opp_table_unlocked(struct device *dev) } /** - * _find_opp_table() - find opp_table struct using device pointer + * _find_opp_table_indexed() - find opp_table struct using device pointer * @dev: device pointer used to lookup OPP table + * @index: Index number. * - * Search OPP table for one containing matching device. + * Search OPP table for one containing matching device at the given + * index. * * Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or * -EINVAL based on type of error. * * The callers must call dev_pm_opp_put_opp_table() after the table is used. */ -struct opp_table *_find_opp_table(struct device *dev) +struct opp_table *_find_opp_table_indexed(struct device *dev, int index) { struct opp_table *opp_table; @@ -87,12 +96,28 @@ struct opp_table *_find_opp_table(struct device *dev) } mutex_lock(&opp_table_lock); - opp_table = _find_opp_table_unlocked(dev); + opp_table = _find_opp_table_indexed_unlocked(dev, index); mutex_unlock(&opp_table_lock); return opp_table; } +/** + * _find_opp_table() - find opp_table struct using device pointer + * @dev: device pointer used to lookup OPP table + * + * Search OPP table for one containing matching device. + * + * Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or + * -EINVAL based on type of error. + * + * The callers must call dev_pm_opp_put_opp_table() after the table is used. + */ +struct opp_table *_find_opp_table(struct device *dev) +{ + return _find_opp_table_indexed(dev, 0); +} + /** * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp * @opp: opp for which voltage has to be returned for @@ -1238,7 +1263,7 @@ static struct opp_table *_opp_get_opp_table(struct device *dev, int index) /* Hold our table modification lock here */ mutex_lock(&opp_table_lock); - opp_table = _find_opp_table_unlocked(dev); + opp_table = _find_opp_table_indexed_unlocked(dev, index); if (!IS_ERR(opp_table)) goto unlock; @@ -2612,7 +2637,7 @@ void _dev_pm_opp_find_and_remove_table(struct device *dev) struct opp_table *opp_table; /* Check for existing table for 'dev' */ - opp_table = _find_opp_table(dev); + opp_table = _find_opp_table_indexed(dev, 0); if (IS_ERR(opp_table)) { int error = PTR_ERR(opp_table);