From patchwork Tue Feb 9 12:59:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 12078073 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=-17.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,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 E4430C433DB for ; Tue, 9 Feb 2021 13:02:52 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9A9F464E2E for ; Tue, 9 Feb 2021 13:02:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A9F464E2E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=mZ6IDMF2HK0YDre7sAa36IbKAIZFUTjvCAkno5sPfbI=; b=Vdg+PR/6H8+t4ZHbGH6uosQEf PXlBIrTiIxxwHsye01AjR+RNp64s3bg0qDJIwBlVpIVUguwExBHJEcgulj9V6xSboW2+WDAeWATO9 YJF461Emt9uCkdMtP0FDYwrXzNRRTh0tlA199XKCvCBhDRYwkobjhgu/26/bGYRTt2TQjxYEI3BNr y8KhKV/qtL9tbdbqR8y2M8MhB8AYP6nXADWu+PlI1MnPvYdjpTAozdXxeeBjQKW5jluFxtZ6Uq93d ZI7YP4fqKj8gzLBjBCz2nZd2qKuKZr0jbXi47EluA+nFkauLvNydT4ntyQisU4hVLglHbWmRP/swh csNXTt2DQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l9Se3-0004Yj-3P; Tue, 09 Feb 2021 13:01:31 +0000 Received: from mx2.suse.de ([195.135.220.15]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l9SdK-0004IH-Jl; Tue, 09 Feb 2021 13:00:52 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 7550BAFD2; Tue, 9 Feb 2021 13:00:45 +0000 (UTC) From: Nicolas Saenz Julienne To: f.fainelli@gmail.com, linux-kernel@vger.kernel.org, Lee Jones , Nicolas Saenz Julienne , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com Subject: [RFC/PATCH v2 07/16] mfd: bcm2835-pm: Use 'reg-names' to get resources Date: Tue, 9 Feb 2021 13:59:03 +0100 Message-Id: <20210209125912.3398-8-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210209125912.3398-1-nsaenzjulienne@suse.de> References: <20210209125912.3398-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210209_080046_828238_4235A125 X-CRM114-Status: GOOD ( 17.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mripard@kernel.org, eric@anholt.net, wahrenst@gmx.net, phil@raspberrypi.com, linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org If available in firmware, find resources by their 'reg-names' position instead of relying on hardcoded offsets. Care is taken to support old firmware nonetheless. Signed-off-by: Nicolas Saenz Julienne --- drivers/mfd/bcm2835-pm.c | 56 ++++++++++++++++++++++++++-------------- 1 file changed, 37 insertions(+), 19 deletions(-) diff --git a/drivers/mfd/bcm2835-pm.c b/drivers/mfd/bcm2835-pm.c index 836343e69f43..182ccdc2a06b 100644 --- a/drivers/mfd/bcm2835-pm.c +++ b/drivers/mfd/bcm2835-pm.c @@ -25,9 +25,38 @@ static const struct mfd_cell bcm2835_power_devs[] = { { .name = "bcm2835-power" }, }; +static int bcm2835_pm_get_pdata(struct platform_device *pdev, + struct bcm2835_pm *pm) +{ + /* If no 'reg-names' property is found we can assume we're using old + * firmware. + */ + if (!of_find_property(pm->dev->of_node, "reg-names", NULL)) { + dev_warn(pm->dev, "Old devicetree detected, please update your firmware.\n"); + + pm->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(pm->base)) + return PTR_ERR(pm->base); + + pm->rpivid_asb = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(pm->rpivid_asb)) + pm->rpivid_asb = NULL; + } else { + pm->base = devm_platform_ioremap_resource_byname(pdev, "pm"); + if (IS_ERR(pm->base)) + return PTR_ERR(pm->base); + + pm->rpivid_asb = devm_platform_ioremap_resource_byname(pdev, + "rpivid_asb"); + if (IS_ERR(pm->base)) + pm->rpivid_asb = NULL; + } + + return 0; +} + static int bcm2835_pm_probe(struct platform_device *pdev) { - struct resource *res; struct device *dev = &pdev->dev; struct bcm2835_pm *pm; int ret; @@ -39,10 +68,9 @@ static int bcm2835_pm_probe(struct platform_device *pdev) pm->dev = dev; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - pm->base = devm_ioremap_resource(dev, res); - if (IS_ERR(pm->base)) - return PTR_ERR(pm->base); + ret = bcm2835_pm_get_pdata(pdev, pm); + if (ret) + return ret; ret = devm_mfd_add_devices(dev, -1, bcm2835_pm_devs, ARRAY_SIZE(bcm2835_pm_devs), @@ -54,20 +82,10 @@ static int bcm2835_pm_probe(struct platform_device *pdev) * bcm2835-pm binding as the key for whether we can reference * the full PM register range and support power domains. */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - if (res) { - pm->rpivid_asb = devm_ioremap_resource(dev, res); - if (IS_ERR(pm->rpivid_asb)) - return PTR_ERR(pm->rpivid_asb); - - ret = devm_mfd_add_devices(dev, -1, - bcm2835_power_devs, - ARRAY_SIZE(bcm2835_power_devs), - NULL, 0, NULL); - if (ret) - return ret; - } - + if (pm->rpivid_asb) + return devm_mfd_add_devices(dev, -1, bcm2835_power_devs, + ARRAY_SIZE(bcm2835_power_devs), + NULL, 0, NULL); return 0; }