linux-kernel - Re: [PATCH v17 06/12] soc: mediatek: Add support for hierarchical scpsys device node

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Date:   Thu, 1 Oct 2020 16:33:52 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Weiyi Lu <weiyi.lu@...iatek.com>,
        Nicolas Boichat <drinkcat@...omium.org>
Cc:     Enric Balletbo Serra <eballetbo@...il.com>,
        Rob Herring <robh@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        James Liao <jamesjj.liao@...iatek.com>,
        Fan Chen <fan.chen@...iatek.com>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        srv_heupstream <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v17 06/12] soc: mediatek: Add support for hierarchical
 scpsys device node



On 30/09/2020 05:37, Weiyi Lu wrote:
> On Mon, 2020-09-28 at 15:14 +0800, Nicolas Boichat wrote:
>> On Thu, Aug 6, 2020 at 5:22 PM Weiyi Lu <weiyi.lu@...iatek.com> wrote:
>>>
>>> Try to list all the power domains of under power controller
>>> node to show the dependency between each power domain directly
>>> instead of filling the dependency in scp_soc_data.
>>> And could be more clearly to group subsys clocks into power domain
>>> sub node to introduce subsys clocks of bus protection in next patch.
>>>
>>> Signed-off-by: Weiyi Lu <weiyi.lu@...iatek.com>
>>> ---
>> [snip]
>>> +static int traverse_scp(struct platform_device *pdev, struct scp *scp,
>>> +                       const struct scp_domain_data *scp_domain_data)
>>> +{
>>> +       struct device *dev = &pdev->dev;
>>> +       struct device_node *np = dev->of_node;
>>> +       struct device_node *sub;
>>> +       int ret;
>>> +
>>> +       INIT_LIST_HEAD(&scp->dep_links);
>>> +
>>> +       for_each_available_child_of_node(np, sub) {
>>> +               ret = scpsys_get_domain(pdev, scp, sub, scp_domain_data);
>>> +               if (ret) {
>>> +                       dev_err(&pdev->dev, "failed to handle node %pOFn: %d\n", sub, ret);
>>
>> minor comment: this error should not be printed if ret ==
>> -EPROBE_DEFER (use the new dev_err_probe?)
>>
> 
> You're right! I'll use dev_err_probe() instead if anyone is interested
> in this series. Thank you!
> 

I'd propose that we put all our effort of reviewing and testing into the series 
Enric send:
https://lore.kernel.org/linux-mediatek/20200910172826.3074357-1-enric.balletbo@collabora.com/

Regards,
Matthias

>>> +                       goto err;
>>> +               }
>>> +       }
>>> +
>>> +       return 0;
>>> +
>>> +err:
>>> +       of_node_put(sub);
>>> +       return ret;
>>> +}
>> [snip]
>