From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E29621917ED; Fri, 30 Aug 2024 10:24:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725013483; cv=none; b=j605ivKc4ts7mNDqnRAFRCx49O+QwY8PB+ST88462GlE0Gcv/w3j8wqnYA/r0nJWb21tyhVfynQHjoGs95ACFg4+nQYnUL193vg/Oz4hybMoayGtN96pOKHfavUV6mPoluYKa/JMcEMLyo1+MemOW+jsiV79qB5XHQgkosg/qAo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725013483; c=relaxed/simple; bh=wbRjVaY021e1Ru6tFv9/hHGq0msE+MdSlakr4cmQyaU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=pXQyAlClbNZlfdX9pWz17UDRE7CqKVG86olXZws67bJt3sT5vCqZYhfiaruxjCreHV+4XDTNLFWCQNindmB0CNdAzTD1fsW9PXhrto5eoiSWQko/U+5mS31HzZoVpRvI142qt3M6kLjlk5lwFIuJwm6XlE26ZlTe+kkJQWXUC4g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eLmZmi7b; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eLmZmi7b" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0C425C4CEC6; Fri, 30 Aug 2024 10:24:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725013482; bh=wbRjVaY021e1Ru6tFv9/hHGq0msE+MdSlakr4cmQyaU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=eLmZmi7b8Gfvy730GIvY8ljpUAlAxp60fksmctjJ3arSzSIYG/E8+9fNxP2Ie84s1 zQiMXkjVrV3ZRZLHxn14NExZJhnJvNHCMs5U/rre13pwWeD9cmYN42QKD7jtTAKekL cwTBI6n9iZkeM8o1Gsximqj7JiKOK8T6OacHEtCehX5DitE81Yy8Tq2Pez5ArOaVtj ESCY6NEcZvW8OYeFsPEf6KschieYLJRYkb82KIdlQFg8K2PUeDcDmIcMRTP274u/MT cgbK2dgQdECYgSmUpKv3YrB7dv1PUvJUCYtaZnNNCIEHPI/r+xdHfkwR345CvW5ZSy BlQawzqsJVL7g== Message-ID: Date: Fri, 30 Aug 2024 12:24:34 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 2/7] coresight: Add coresight TGU driver To: songchai , Suzuki K Poulose , Mike Leach , James Clark , Alexander Shishkin , Andy Gross , Bjorn Andersson , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org References: <20240830092311.14400-1-quic_songchai@quicinc.com> <20240830092311.14400-3-quic_songchai@quicinc.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 30/08/2024 11:23, songchai wrote: > Add driver to support Coresight device TGU (Trigger Generation Unit). > TGU is a Data Engine which can be utilized to sense a plurality of > signals and create a trigger into the CTI or generate interrupts to > processors. Add probe/enable/disable functions for tgu. > > Signed-off-by: songchai ... > + > +static struct attribute *tgu_common_attrs[] = { > + &dev_attr_enable_tgu.attr, > + NULL, > +}; > + > +static struct attribute_group tgu_common_grp = { Not const? > + .attrs = tgu_common_attrs, > + NULL, > +}; > + > +static const struct attribute_group *tgu_attr_groups[] = { > + &tgu_common_grp, > + NULL, > +}; > + > +static int tgu_probe(struct amba_device *adev, const struct amba_id *id) > +{ > + int ret = 0; > + struct device *dev = &adev->dev; > + struct coresight_platform_data *pdata; > + struct tgu_drvdata *drvdata; > + struct coresight_desc desc = { 0 }; Code is quite mixed here... Bring some order - declarations with and without assignments. > + > + desc.name = coresight_alloc_device_name(&tgu_devs, dev); > + if (!desc.name) > + return -ENOMEM; > + > + pdata = coresight_get_platform_data(dev); > + if (IS_ERR(pdata)) > + return PTR_ERR(pdata); > + > + adev->dev.platform_data = pdata; > + > + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); > + if (!drvdata) > + return -ENOMEM; > + > + drvdata->dev = &adev->dev; > + dev_set_drvdata(dev, drvdata); > + > + drvdata->base = devm_ioremap_resource(dev, &adev->res); > + if (!drvdata->base) > + return -ENOMEM; > + > + spin_lock_init(&drvdata->spinlock); > + > + drvdata->enable = false; > + desc.type = CORESIGHT_DEV_TYPE_HELPER; > + desc.pdata = adev->dev.platform_data; > + desc.dev = &adev->dev; > + desc.ops = &tgu_ops; > + desc.groups = tgu_attr_groups; > + > + drvdata->csdev = coresight_register(&desc); > + if (IS_ERR(drvdata->csdev)) { > + ret = PTR_ERR(drvdata->csdev); > + goto err; > + } > + > + pm_runtime_put(&adev->dev); > + dev_dbg(dev, "TGU initialized\n"); Drop, useless. Kernel provides you already ways to know probe status. > + return 0; > +err: > + pm_runtime_put(&adev->dev); > + return ret; > +} > + > +static struct amba_id tgu_ids[] = { Not const? > + { > + .id = 0x0003b999, > + .mask = 0x0003ffff, > + .data = "TGU", > + }, > + { 0, 0 }, > +}; No module device table? > + > +static struct amba_driver tgu_driver = { > + .drv = { > + .name = "coresight-tgu", > + .owner = THIS_MODULE, Please drop. Also one-less indentation. > + .suppress_bind_attrs = true, > + }, > + .probe = tgu_probe, > + .id_table = tgu_ids, > +}; > + > +module_amba_driver(tgu_driver); > + > +MODULE_LICENSE("GPL"); > +MODULE_DESCRIPTION("CoreSight TGU driver"); Best regards, Krzysztof