linux-kernel - Re: [PATCH v3] gpio: uniphier: add UniPhier GPIO controller driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Thu, 7 Sep 2017 10:11:42 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Marc Zyngier <marc.zyngier@....com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3] gpio: uniphier: add UniPhier GPIO controller driver

Hi Linus,


2017-08-31 22:41 GMT+09:00 Linus Walleij <linus.walleij@...aro.org>:
> On Tue, Aug 22, 2017 at 6:16 PM, Masahiro Yamada
> <yamada.masahiro@...ionext.com> wrote:
>
>> This GPIO controller device is used on UniPhier SoCs.
>>
>> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
>> ---
>>
>> Changes in v3:
>>   - Add .irq_set_affinity() hook
>>   - Use irq_domain_create_hierarchy() instead of legacy
>>     irq_domain_add_hierarchy().
>
> This is getting better and better.
>
>> +static const u32 uniphier_gpio_irq_parent_hwirqs[] = {
>> +       48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
>> +       154, 155, 156, 157, 158, 217, 218, 219,
>> +};
>
> This array which is used when allocating the hierarchical domain
> looks like configuration data. Why is it not in the device tree?
>


Another solution might be
to use the brand-new irq_domain_push_irq().


With a quick look at it, the hierarchy IRQ domain can work with
#interrupts property by inserting the outer-most irq_data with
irq_domain_push_irq().


If you are unhappy with hard-coded configuration parameters,
I will switch to generic compatible + DT properties approach.


-- 
Best Regards
Masahiro Yamada