linux-kernel - Re: [PATCH 3/3] firmware: stratix10-svc: Add of_platform_default

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Message-ID: <Z6RVVGriTgZIM22k@yilunxu-OptiPlex-7050>
Date: Thu, 6 Feb 2025 14:23:16 +0800
From: Xu Yilun <yilun.xu@...ux.intel.com>
To: Mahesh Rao <mahesh.rao@...el.com>
Cc: conor+dt@...nel.org, devicetree@...r.kernel.org, dinguyen@...nel.org,
	hao.wu@...el.com, krzk+dt@...nel.org,
	krzysztof.kozlowski@...aro.org, linux-fpga@...r.kernel.org,
	linux-kernel@...r.kernel.org, mahesh.rao@...era.com, mdf@...nel.org,
	robh@...nel.org, trix@...hat.com, yilun.xu@...el.com
Subject: Re: [PATCH 3/3] firmware: stratix10-svc: Add
 of_platform_default_populate()

On Thu, Jan 30, 2025 at 02:01:13AM +0800, Mahesh Rao wrote:
> Hi Yilun,
> Thanks for reviewing the patch.
> 
> On Sun, 26 Jan 2025 16:28:55 +0800, Xu Yilun wrote:
> > > Add of_platform_default_populate() to stratix10-svc driver as the
> > > firmware/svc node was moved out of soc.
> > > This fixes the failed probing of child drivers of svc node.
> > >
> > > Fixes: 23c3ebed382a ("arm64: dts: socfpga: agilex: move firmware out
> > > of soc node")
> 
> > > +	ret = of_platform_default_populate(dev_of_node(dev), NULL, dev);
> > > +	if (ret < 0) {
> > 
> > 	if (ret)  is just fine.
> 
> ok ,I will make the change.
> 
> > 
> > > +		of_platform_depopulate(dev);
> > > +		goto err_unregister_fcs_dev;
> > 
> > You wanna destroy everything even if some child drivers work?
> 
> Currently, there is no requirement to retain the driver if a child component fails.
> we will handle it if it is needed in the future.

Does the previous "soc" style population did the same way?

Thanks,
Yilun

> 
> > And do we need to do depopulation on driver remove?
> 
> I think yes , I have missed this. I will add depopulate in the remove callback().
> 
> > I'm actually a little confused how to handle populate() fail and depopulate().
> 
> I think this was a mistake on my side. I will make the change in next revision.
> 
> Best Regards,
> Mahesh Rao