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=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 AA94FC10F29 for ; Wed, 18 Mar 2020 18:16:14 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 83CCB2077E for ; Wed, 18 Mar 2020 18:16:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="YORpe9Gq"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="RVavPlmF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 83CCB2077E 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-arm-kernel-bounces+infradead-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=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ureCY31Jbllhg5nfisuisnOdCQLAJRSwJQg+hnblY3E=; b=YORpe9GqOZIw94 f5yPhx89NSGEHXPHPBFe1G5sP0BpeN2u2U5CbJdqYh4pZ89/81YH+TaIWJvsdkBFD5MWrxxxs5dlr 3KzsfKmMBWoBl4zc2cznK3Y31hoS/LXQEKZ1m8LroItcs5o5Ehdi9s1HbqZo/nzvPj9BqhPSYrSS+ NvYEymIs4fH4B3nub3qPczJr4RmStxP+FatMdjydFf5t5DDnbV8a0MseNMedGuU6oCUcAPcfALjYb K9Rj76x4HESzNZ0kVE9//OjA3zPv5eSxLULOloKKHfZXLcLGOga2WwJAeRp/E1Gk70hPBuC9g5cQG kdTXTi1uHgsPyEU7uBsw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jEdEg-00045G-CE; Wed, 18 Mar 2020 18:16:10 +0000 Received: from mail-pf1-x444.google.com ([2607:f8b0:4864:20::444]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jEdEd-00044j-Eo for linux-arm-kernel@lists.infradead.org; Wed, 18 Mar 2020 18:16:09 +0000 Received: by mail-pf1-x444.google.com with SMTP id f206so3311042pfa.10 for ; Wed, 18 Mar 2020 11:16:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=beSLS6KccZJfpFDT+vWQCRVFQjr+hT/1HsXon9oZNTs=; b=RVavPlmFJAX48SFQzNLnKS+jECaKmjSq7wGgWa8Ru8DEDo5L22eJZ3SsFAdzOXi4uF W3b1RjMZL2JpNF3Iz6sq3fkBTEX/feqaT+0EoTCEIYKH7F0lMBgIWHfZnfu3ZW+tVxXI Jcwj0NTvYpwymWWlYNV3JhlJGb08KA57XXb8dNrNlHuIev/+CC1zB2v9nRBmyynmknEk R6/MaSIhLFJ/OSQ2t4SX4Rd8KHGnO+qFGi9Yan0RKhoed7gn5ySHSZcm+gWiqXaxSwou jYLmiRN+yl6hXjkJuMy32YvZCKFWyBdamTyaqDbP6Rw2GEjoK/LtbGWmptXXlhGUkU6a ZItw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=beSLS6KccZJfpFDT+vWQCRVFQjr+hT/1HsXon9oZNTs=; b=IU9WFSs31Mp7F/OaXuGovOFNL9RPblNwNpPCm4BnxvY2M8haIb2Vvu7AB4ILFepfQz ykpaKq7RhPo4wpeLel2GTGQcLQ/OyAsqtF8mPOD5ME+B52pnPjMcVTWZCHO8KqFhZCwf lR6K+bP0sBTTj4fnbKvnqSL/evf5mzyEOFeO/GVEwJ1g2EddlY+SsKB3Rn9R+6AVUROX iRYxtpcysFIDZbsPoJuUVeP410DHu9KhtvgtntLxvob9FmkmhEy2F0CKhDIiTfRoMh1R MzutlRYudrFAxBhV3HQGcJb3CLmg3j7AvtW8zRAaXtfk2+9SR8fP6v+ELDBCEdBjvfrp tA/A== X-Gm-Message-State: ANhLgQ2mQKVAuVyJqC7uZz5SqtMelfNLRvZA7e0n4Vsbux+qglAWQHQH qF7MvdOAd0CWFb1g34FoFQjZQg== X-Google-Smtp-Source: ADFU+vv8IeOP/LyfBQhw2wQmADS7FfUPmRtzju2D7BaVZTBpLR8uOdRRfL9uR8sWmmwTdxwkgaeMmQ== X-Received: by 2002:a63:441e:: with SMTP id r30mr5780514pga.51.1584555366722; Wed, 18 Mar 2020 11:16:06 -0700 (PDT) Received: from xps15 (S0106002369de4dac.cg.shawcable.net. [68.147.8.254]) by smtp.gmail.com with ESMTPSA id z20sm6739589pge.62.2020.03.18.11.16.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Mar 2020 11:16:06 -0700 (PDT) Date: Wed, 18 Mar 2020 12:16:04 -0600 From: Mathieu Poirier To: Greg KH Subject: Re: [PATCH 02/13] coresight: cti: Add sysfs coresight mgmt register access Message-ID: <20200318181604.GB18359@xps15> References: <20200309161748.31975-1-mathieu.poirier@linaro.org> <20200309161748.31975-3-mathieu.poirier@linaro.org> <20200318131821.GA2789508@kroah.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200318131821.GA2789508@kroah.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200318_111607_499751_A85E9F5C X-CRM114-Status: GOOD ( 19.81 ) 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: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Mar 18, 2020 at 02:18:21PM +0100, Greg KH wrote: > On Mon, Mar 09, 2020 at 10:17:37AM -0600, Mathieu Poirier wrote: > > From: Mike Leach > > > > Adds sysfs access to the coresight management registers. > > > > Signed-off-by: Mike Leach > > Reviewed-by: Mathieu Poirier > > Reviewed-by: Suzuki K Poulose > > [Fixed abbreviation in title] > > Signed-off-by: Mathieu Poirier > > --- > > .../hwtracing/coresight/coresight-cti-sysfs.c | 53 +++++++++++++++++++ > > drivers/hwtracing/coresight/coresight-priv.h | 1 + > > 2 files changed, 54 insertions(+) > > > > diff --git a/drivers/hwtracing/coresight/coresight-cti-sysfs.c b/drivers/hwtracing/coresight/coresight-cti-sysfs.c > > index a832b8c6b866..507f8eb487fe 100644 > > --- a/drivers/hwtracing/coresight/coresight-cti-sysfs.c > > +++ b/drivers/hwtracing/coresight/coresight-cti-sysfs.c > > @@ -62,11 +62,64 @@ static struct attribute *coresight_cti_attrs[] = { > > NULL, > > }; > > > > +/* register based attributes */ > > + > > +/* macro to access RO registers with power check only (no enable check). */ > > +#define coresight_cti_reg(name, offset) \ > > +static ssize_t name##_show(struct device *dev, \ > > + struct device_attribute *attr, char *buf) \ > > +{ \ > > + struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \ > > + u32 val = 0; \ > > + pm_runtime_get_sync(dev->parent); \ > > + spin_lock(&drvdata->spinlock); \ > > + if (drvdata->config.hw_powered) \ > > + val = readl_relaxed(drvdata->base + offset); \ > > + spin_unlock(&drvdata->spinlock); \ > > + pm_runtime_put_sync(dev->parent); \ > > + return scnprintf(buf, PAGE_SIZE, "0x%x\n", val); \ > > +} \ > > +static DEVICE_ATTR_RO(name) > > + > > +/* coresight management registers */ > > +coresight_cti_reg(devaff0, CTIDEVAFF0); > > +coresight_cti_reg(devaff1, CTIDEVAFF1); > > +coresight_cti_reg(authstatus, CORESIGHT_AUTHSTATUS); > > +coresight_cti_reg(devarch, CORESIGHT_DEVARCH); > > +coresight_cti_reg(devid, CORESIGHT_DEVID); > > +coresight_cti_reg(devtype, CORESIGHT_DEVTYPE); > > +coresight_cti_reg(pidr0, CORESIGHT_PERIPHIDR0); > > +coresight_cti_reg(pidr1, CORESIGHT_PERIPHIDR1); > > +coresight_cti_reg(pidr2, CORESIGHT_PERIPHIDR2); > > +coresight_cti_reg(pidr3, CORESIGHT_PERIPHIDR3); > > +coresight_cti_reg(pidr4, CORESIGHT_PERIPHIDR4); > > + > > +static struct attribute *coresight_cti_mgmt_attrs[] = { > > + &dev_attr_devaff0.attr, > > + &dev_attr_devaff1.attr, > > + &dev_attr_authstatus.attr, > > + &dev_attr_devarch.attr, > > + &dev_attr_devid.attr, > > + &dev_attr_devtype.attr, > > + &dev_attr_pidr0.attr, > > + &dev_attr_pidr1.attr, > > + &dev_attr_pidr2.attr, > > + &dev_attr_pidr3.attr, > > + &dev_attr_pidr4.attr, > > + NULL, > > +}; > > + > > static const struct attribute_group coresight_cti_group = { > > .attrs = coresight_cti_attrs, > > }; > > > > +static const struct attribute_group coresight_cti_mgmt_group = { > > + .attrs = coresight_cti_mgmt_attrs, > > + .name = "mgmt", > > +}; > > + > > const struct attribute_group *coresight_cti_groups[] = { > > &coresight_cti_group, > > + &coresight_cti_mgmt_group, > > NULL, > > }; > > diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h > > index 82e563cdc879..aba6b789c969 100644 > > --- a/drivers/hwtracing/coresight/coresight-priv.h > > +++ b/drivers/hwtracing/coresight/coresight-priv.h > > @@ -22,6 +22,7 @@ > > #define CORESIGHT_CLAIMCLR 0xfa4 > > #define CORESIGHT_LAR 0xfb0 > > #define CORESIGHT_LSR 0xfb4 > > +#define CORESIGHT_DEVARCH 0xfbc > > #define CORESIGHT_AUTHSTATUS 0xfb8 > > #define CORESIGHT_DEVID 0xfc8 > > #define CORESIGHT_DEVTYPE 0xfcc > > -- > > 2.20.1 > > > > I do not see any Documentation/ABI/ entries for these new sysfs files, > did I miss it somehow? I can't take new sysfs code without > documentation. All the ABI is documented in this patch, which is part of this set. [1]. https://lkml.org/lkml/2020/3/9/642 Thanks, Mathieu > > thanks, > > greg k-h _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel