From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 56E4923F40C for ; Thu, 13 Feb 2025 13:08:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739452118; cv=none; b=oYyrsWuObCsKLiBmFbHrA8sQ7xMkHWa9Ddw6RNdk2Qudz9gJa7hTgcxlPNkiyl9IIO+iaCl1dFzRLqJhxidNZIXpe383XnjSjFhATNXE1KjBZYN10IPWdJQTH/nbEjQb1Vbcrc4T3hkbsyOQxSgByBuWgotCtId80lxoqLc7sPw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739452118; c=relaxed/simple; bh=66HnS2WU7zn4HR8Ta71sxVZqxMt8cAFKsInmnCjPJwo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=hdAer+fpdSuDSw8Yo5KR82moEnpsff6TPQqffVbpF5M+Fn1arD9LsqoKRiNWQuJDFrOQ7MBe7gUh/jXdbaxYlcABegOsYZ0Az6feMynSYiut8tZV8DPt14rswBNGrqnvKGc+xFTre6y8KkCC25qVw5KCl1XQzYalPLpTUeR7fcs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 E3D1E16F3; Thu, 13 Feb 2025 05:08:54 -0800 (PST) Received: from pluto (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 18FD83F58B; Thu, 13 Feb 2025 05:08:31 -0800 (PST) Date: Thu, 13 Feb 2025 13:08:19 +0000 From: Cristian Marussi To: Saravana Kannan Cc: Cristian Marussi , Dan Carpenter , Peng Fan , Sudeep Holla , Linus Walleij , Dong Aisheng , Fabio Estevam , Shawn Guo , Jacky Bai , Pengutronix Kernel Team , Sascha Hauer , arm-scmi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, imx@lists.linux.dev, Peng Fan Subject: Re: [PATCH v2 1/4] firmware: arm_scmi: Bypass setting fwnode for scmi cpufreq Message-ID: References: <20250120-scmi-fwdevlink-v2-0-3af2fa37dbac@nxp.com> <20250120-scmi-fwdevlink-v2-1-3af2fa37dbac@nxp.com> <7a29ec8f-fef8-4f1c-a2eb-16a63f2b820c@stanley.mountain> <20250206105218.GA22527@localhost.localdomain> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Thu, Feb 13, 2025 at 12:17:06AM -0800, Saravana Kannan wrote: > On Thu, Feb 6, 2025 at 3:42 AM Cristian Marussi > wrote: > > > > On Thu, Feb 06, 2025 at 02:31:19PM +0300, Dan Carpenter wrote: > > > On Thu, Feb 06, 2025 at 06:52:20PM +0800, Peng Fan wrote: > > > > On Wed, Feb 05, 2025 at 03:45:00PM +0300, Dan Carpenter wrote: > > > > >On Mon, Jan 20, 2025 at 03:13:29PM +0800, Peng Fan (OSS) wrote: > > > > >> diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c > > > > >> index 2c853c84b58f530898057e4ab274ba76070de05e..7850eb7710f499888d32aebf5d99df63db8bfa26 100644 > > > > >> --- a/drivers/firmware/arm_scmi/bus.c > > > > >> +++ b/drivers/firmware/arm_scmi/bus.c > > > > >> @@ -344,6 +344,21 @@ static void __scmi_device_destroy(struct scmi_device *scmi_dev) > > > > >> device_unregister(&scmi_dev->dev); > > > > >> } > > > > >> > > > > >> +static int > > > > >> +__scmi_device_set_node(struct scmi_device *scmi_dev, struct device_node *np, > > > > >> + int protocol, const char *name) > > > > >> +{ > > > > >> + /* cpufreq device does not need to be supplier from devlink perspective */ > > > > >> + if ((protocol == SCMI_PROTOCOL_PERF) && !strcmp(name, "cpufreq")) { > > > > > > > > > >I don't love this... It seems like an hack. Could we put a flag > > > > >somewhere instead? Perhaps in scmi_device? (I'm just saying that > > > > >because that's what we're passing to this function). > > > > > > > > This means when creating scmi_device, a flag needs to be set which requires > > > > to extend scmi_device_id to include a flag entry or else. > > > > > > > > As below in scmi-cpufreq.c > > > > { SCMI_PROTOCOL_PERF, "cpufreq", SCMI_FWNODE_NO } > > > > > > > > > > Yeah, I like that. > > > > > > - if ((protocol == SCMI_PROTOCOL_PERF) && !strcmp(name, "cpufreq")) { > > > + if (scmi_dev->flags & SCMI_FWNODE_NO) { > > > > > > Or we could do something like "if (scmi_dev->no_fwnode) {" > > > > I proposed a flag a few review ago about this, it shoule come somehow > > from the device_table above like Peng was proposing, so that a driver > > can just declare that does NOT need fw_devlink. > > Sorry, looks I replied to v1 series. Can you take a look at that > response please? > https://lore.kernel.org/lkml/CAGETcx87Stfkru9gJrc1sf=PtFGLY7=jrfFaCzK5Z4hq+2TCzg@mail.gmail.com/ > > If that suggestion I gave there would work, then that's the cleanest > approach. This patch series is just kicking the can down the road (or > down an inch). Thanks for the reply, I will answer on that other thread. Cristian