linux-kernel - Re: [PATCH v3 3/3] soc: loongson2_pm: add power management support

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Message-ID: <CAAhV-H4-LCryuQKJrwE65w5BZ66a6PQAq+ZT8mqE7vHa7L3_zw@mail.gmail.com>
Date:   Fri, 16 Jun 2023 09:54:22 +0800
From:   Huacai Chen <chenhuacai@...nel.org>
To:     zhuyinbo <zhuyinbo@...ngson.cn>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        WANG Xuerui <kernel@...0n.name>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Pavel Machek <pavel@....cz>, Marc Zyngier <maz@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        loongarch@...ts.linux.dev, Jianmin Lv <lvjianmin@...ngson.cn>,
        wanghongliang@...ngson.cn, Liu Peibao <liupeibao@...ngson.cn>,
        loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH v3 3/3] soc: loongson2_pm: add power management support

Hi, Yinbo,

On Fri, Jun 16, 2023 at 9:45 AM zhuyinbo <zhuyinbo@...ngson.cn> wrote:
>
>
> Hi huacai,
>
>
> 在 2023/6/15 下午7:15, zhuyinbo 写道:
> >
> >
> > 在 2023/6/15 下午6:00, Huacai Chen 写道:
> >
> >>> +static void loongson2_pm_status_clear(void)
> >>> +{
> >>> +       u16 value;
> >>> +
> >>> +       value = loongson2_pm_readw(LOONGSON2_PM1_STS_REG);
> >>> +       value |= (LOONGSON2_PM1_PWRBTN_STS |
> >>> LOONGSON2_PM1_PCIEXP_WAKE_STS |
> >>> +                 LOONGSON2_PM1_WAKE_STS);
> >>> +       loongson2_pm_writew(value, LOONGSON2_PM1_STS_REG);
> >>> +       loongson2_pm_writel(loongson2_pm_readl(LOONGSON2_GPE0_STS_REG),
> >>> +                           LOONGSON2_GPE0_STS_REG);
> >> Long-line warnings is removed in latest kernel, so you don't need to
> >> split here.
> >
> >
> > okay, I got it.
> >
> >>
> >>> +}
> >>> +
> >>> +static void loongson2_power_button_irq_enable(void)
> >>
> >> Using loongson2_pm_irq_enable is a little better.
> >
> >
>
> Previously, you suggested that I combine loongson2_pm_irq_enable() and
> power button irq enable code as loongson2_power_button_irq_enable, then
> I remove the function loongson2_pm_irq_enable, in this case that I won't
> be able to call loongson2_pm_irq_enable, so have I misunderstood your
> meaning ? or only rename loongson2_power_button_irq_enable as
> loongson2_pm_irq_enable ?
I'm very sorry for that. At first I only wanted to combine two
functions, but then I found the name  loongson2_pm_irq_enable is
better. So just rename is OK. Thanks.

Huacai
>
> Thanks,
> Yinbo
>
> >
> > ...
> >
> >>> +static int loongson2_suspend_valid_state(suspend_state_t state)
> >>> +{
> >>> +       if (state == PM_SUSPEND_MEM)
> >>> +               return 1;
> >>> +
> >>> +       return 0;
> >> "return (state == PM_SUSPEND_MEM)" is enough.
> >
> >
> > okay, I got it.
> >
> >
> > Thanks,
> > Yinbo
> >
>
>