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=-8.2 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,URIBL_BLOCKED,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 CDC25C43603 for ; Wed, 11 Dec 2019 18:07:07 +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 A0636206C3 for ; Wed, 11 Dec 2019 18:07:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="NbOG5pWZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A0636206C3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com 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:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:Reply-To:Cc:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=efitlOATvK5LEyEguOt7tytc//3xp7WMSe+tcdSjUe4=; b=NbOG5pWZDPJrLZOAa0IxHYZU65 iNH4pEYZq3yae2nbt+Muuj34zM8f7pzciltxl+cLfOlq3LtwxSgMjtMVZ0vT5hAGJOFxliWo3neT7 eSUAj23EMBNgW04nNT4Kg4FkdKQZXdnzdMuEQHQbiHiz2wsK2uPnb9O5ouEcWIKq9OByiE2Fc7lfd rqJE8FVAq7mqNOfKHCgnwxatmMWAGHOjYvkuqjaSArxEhIGT/ze4S8UvuWzK5MOy2YOo9Tnrz1DmN hyHEV8pDwfThPOkUsHlZyFFFGoBkrAomnU4DaHQbsavQ6aTH3XKvvX1BEKSmZWRd9V4jGP48V+SgM RdREVcVw==; 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 1if6O8-00041n-7J; Wed, 11 Dec 2019 18:07:04 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1if6Nx-0003rq-Tz for linux-arm-kernel@lists.infradead.org; Wed, 11 Dec 2019 18:06:55 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0854731B; Wed, 11 Dec 2019 10:06:53 -0800 (PST) Received: from [10.1.197.50] (e120937-lin.cambridge.arm.com [10.1.197.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 845B63F6CF; Wed, 11 Dec 2019 10:06:52 -0800 (PST) Subject: Re: [PATCH 08/15] firmware: arm_scmi: Add and initialise protocol version to scmi_device structure To: Sudeep Holla , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20191210145345.11616-1-sudeep.holla@arm.com> <20191210145345.11616-9-sudeep.holla@arm.com> From: Cristian Marussi Message-ID: Date: Wed, 11 Dec 2019 18:06:50 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.1 MIME-Version: 1.0 In-Reply-To: <20191210145345.11616-9-sudeep.holla@arm.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191211_100654_077454_82FACF0F X-CRM114-Status: GOOD ( 20.40 ) 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: , 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 10/12/2019 14:53, Sudeep Holla wrote: > It's useful to keep track of scmi protocol version in the scmi device > structure along with the protocol id. These can be used to expose the > information to the userspace via bus dev_groups attributes as well. > > Signed-off-by: Sudeep Holla > --- > drivers/firmware/arm_scmi/clock.c | 6 +++++- > drivers/firmware/arm_scmi/perf.c | 6 +++++- > drivers/firmware/arm_scmi/power.c | 6 +++++- > drivers/firmware/arm_scmi/reset.c | 6 +++++- > drivers/firmware/arm_scmi/sensors.c | 6 +++++- > include/linux/scmi_protocol.h | 1 + > 6 files changed, 26 insertions(+), 5 deletions(-) > > diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c > index b567ec03f711..b68736ae7f88 100644 > --- a/drivers/firmware/arm_scmi/clock.c > +++ b/drivers/firmware/arm_scmi/clock.c > @@ -318,8 +318,11 @@ static int scmi_clock_protocol_init(struct scmi_device *dev) > struct clock_info *cinfo; > struct scmi_handle *handle = dev->handle; > > - if (handle->clk_ops && handle->clk_priv) > + if (handle->clk_ops && handle->clk_priv) { > + cinfo = handle->clk_priv; > + dev->version = cinfo->version; > return 0; /* initialised already for the first device */ > + } > This is the device specific init stuff which I would remove from this proto initialization, which is the reason for this proto_init to be invoked for all devices defined for such proto. I'd say to move dev->version initialization into the specific scmi_drv->probe which is called after scmi_protocol_init inside bus:scmi_dev_probe, after having disabled the proto_init after the first invocation, once the protocol is initialized, BUT this would result anyway in duplication since you'll have to fill dev->version from the custom protocol info in each of the related scmi drivers, and that would also mean delegating to a possible user scmi driver .probe an initialization which is then needed by the sysfs attribute exposed by the SCMI framework code. So not a solution. Cristian > scmi_version_get(handle, SCMI_PROTOCOL_CLOCK, &version); > > @@ -345,6 +348,7 @@ static int scmi_clock_protocol_init(struct scmi_device *dev) > scmi_clock_describe_rates_get(handle, clkid, clk); > } > > + dev->version = version; > cinfo->version = version; > handle->clk_ops = &clk_ops; > handle->clk_priv = cinfo; > diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c > index b1de6197f61c..8a02dc453894 100644 > --- a/drivers/firmware/arm_scmi/perf.c > +++ b/drivers/firmware/arm_scmi/perf.c > @@ -712,8 +712,11 @@ static int scmi_perf_protocol_init(struct scmi_device *dev) > struct scmi_perf_info *pinfo; > struct scmi_handle *handle = dev->handle; > > - if (handle->perf_ops && handle->perf_priv) > + if (handle->perf_ops && handle->perf_priv) { > + pinfo = handle->perf_priv; > + dev->version = pinfo->version; > return 0; /* initialised already for the first device */ > + } > > scmi_version_get(handle, SCMI_PROTOCOL_PERF, &version); > > @@ -741,6 +744,7 @@ static int scmi_perf_protocol_init(struct scmi_device *dev) > scmi_perf_domain_init_fc(handle, domain, &dom->fc_info); > } > > + dev->version = version; > pinfo->version = version; > handle->perf_ops = &perf_ops; > handle->perf_priv = pinfo; > diff --git a/drivers/firmware/arm_scmi/power.c b/drivers/firmware/arm_scmi/power.c > index d11c6cd6bbab..6267111e38e6 100644 > --- a/drivers/firmware/arm_scmi/power.c > +++ b/drivers/firmware/arm_scmi/power.c > @@ -187,8 +187,11 @@ static int scmi_power_protocol_init(struct scmi_device *dev) > struct scmi_power_info *pinfo; > struct scmi_handle *handle = dev->handle; > > - if (handle->power_ops && handle->power_priv) > + if (handle->power_ops && handle->power_priv) { > + pinfo = handle->power_priv; > + dev->version = pinfo->version; > return 0; /* initialised already for the first device */ > + } > > scmi_version_get(handle, SCMI_PROTOCOL_POWER, &version); > > @@ -212,6 +215,7 @@ static int scmi_power_protocol_init(struct scmi_device *dev) > scmi_power_domain_attributes_get(handle, domain, dom); > } > > + dev->version = version; > pinfo->version = version; > handle->power_ops = &power_ops; > handle->power_priv = pinfo; > diff --git a/drivers/firmware/arm_scmi/reset.c b/drivers/firmware/arm_scmi/reset.c > index dce103781b3f..76f1cee85a06 100644 > --- a/drivers/firmware/arm_scmi/reset.c > +++ b/drivers/firmware/arm_scmi/reset.c > @@ -197,8 +197,11 @@ static int scmi_reset_protocol_init(struct scmi_device *dev) > struct scmi_reset_info *pinfo; > struct scmi_handle *handle = dev->handle; > > - if (handle->reset_ops && handle->reset_priv) > + if (handle->reset_ops && handle->reset_priv) { > + pinfo = handle->reset_priv; > + dev->version = pinfo->version; > return 0; /* initialised already for the first device */ > + } > > scmi_version_get(handle, SCMI_PROTOCOL_RESET, &version); > > @@ -222,6 +225,7 @@ static int scmi_reset_protocol_init(struct scmi_device *dev) > scmi_reset_domain_attributes_get(handle, domain, dom); > } > > + dev->version = version; > pinfo->version = version; > handle->reset_ops = &reset_ops; > handle->reset_priv = pinfo; > diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c > index aac0243e2880..fb3bed4cb171 100644 > --- a/drivers/firmware/arm_scmi/sensors.c > +++ b/drivers/firmware/arm_scmi/sensors.c > @@ -278,8 +278,11 @@ static int scmi_sensors_protocol_init(struct scmi_device *dev) > struct sensors_info *sinfo; > struct scmi_handle *handle = dev->handle; > > - if (handle->sensor_ops && handle->sensor_priv) > + if (handle->sensor_ops && handle->sensor_priv) { > + sinfo = handle->sensor_priv; > + dev->version = sinfo->version; > return 0; /* initialised already for the first device */ > + } > > scmi_version_get(handle, SCMI_PROTOCOL_SENSOR, &version); > > @@ -299,6 +302,7 @@ static int scmi_sensors_protocol_init(struct scmi_device *dev) > > scmi_sensor_description_get(handle, sinfo); > > + dev->version = version; > sinfo->version = version; > handle->sensor_ops = &sensor_ops; > handle->sensor_priv = sinfo; > diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h > index b676825e6eb0..a863bc0cdf28 100644 > --- a/include/linux/scmi_protocol.h > +++ b/include/linux/scmi_protocol.h > @@ -256,6 +256,7 @@ enum scmi_std_protocol { > > struct scmi_device { > u32 id; > + u32 version; > u8 protocol_id; > const char *name; > struct device dev; > -- > 2.17.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel