linux-kernel - Re: [PATCH v5 5/8] cpuidle: Factor-out power domain related code from PSCI domain driver

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Message-ID: <CAAhSdy1D4HnHuuC0Da-rvia5-o3TaCUapTHb-HsBCQ9X6y-AiQ@mail.gmail.com>
Date:   Wed, 9 Jun 2021 13:31:44 +0530
From:   Anup Patel <anup@...infault.org>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Anup Patel <anup.patel@....com>,
        Sandeep Tripathy <milun.tripathy@...il.com>,
        Atish Patra <atish.patra@....com>,
        Alistair Francis <Alistair.Francis@....com>,
        Liush <liush@...winnertech.com>,
        DTML <devicetree@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        "open list:THERMAL" <linux-pm@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v5 5/8] cpuidle: Factor-out power domain related code from
 PSCI domain driver

On Mon, Jun 7, 2021 at 12:04 AM Samuel Holland <samuel@...lland.org> wrote:
>
> On 6/2/21 6:23 AM, Anup Patel wrote:
> > The generic power domain related code in PSCI domain driver is largely
> > independent of PSCI and can be shared with RISC-V SBI domain driver
> > hence we factor-out this code into dt_idle_genpd.c and dt_idle_genpd.h.
> >
> > Signed-off-by: Anup Patel <anup.patel@....com>
> > Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
> > ---
> >  MAINTAINERS                           |   7 +
> >  drivers/cpuidle/Kconfig               |   4 +
> >  drivers/cpuidle/Kconfig.arm           |   1 +
> >  drivers/cpuidle/Makefile              |   1 +
> >  drivers/cpuidle/cpuidle-psci-domain.c | 138 +------------------
> >  drivers/cpuidle/cpuidle-psci.h        |  15 ++-
> >  drivers/cpuidle/dt_idle_genpd.c       | 182 ++++++++++++++++++++++++++
> >  drivers/cpuidle/dt_idle_genpd.h       |  50 +++++++
> >  8 files changed, 263 insertions(+), 135 deletions(-)
> >  create mode 100644 drivers/cpuidle/dt_idle_genpd.c
> >  create mode 100644 drivers/cpuidle/dt_idle_genpd.h
> >
> ...
> > diff --git a/drivers/cpuidle/dt_idle_genpd.h b/drivers/cpuidle/dt_idle_genpd.h
> > new file mode 100644
> > index 000000000000..a8a3bad3cb7f
> > --- /dev/null
> > +++ b/drivers/cpuidle/dt_idle_genpd.h
> > @@ -0,0 +1,50 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +#ifndef __DT_IDLE_GENPD
> > +#define __DT_IDLE_GENPD
> > +
> > +struct device_node;
> > +struct generic_pm_domain;
> > +
> > +#ifdef CONFIG_DT_IDLE_GENPD
> > +
> > +void dt_idle_pd_free(struct generic_pm_domain *pd);
> > +
> > +struct generic_pm_domain *dt_idle_pd_alloc(struct device_node *np,
> > +                     int (*parse_state)(struct device_node *, u32 *));
> > +
> > +int dt_idle_pd_init_topology(struct device_node *np);
> > +
> > +struct device *dt_idle_attach_cpu(int cpu, const char *name);
> > +
> > +void dt_idle_detach_cpu(struct device *dev);
> > +
> > +#else
> > +
> > +static inline void dt_idle_pd_free(struct generic_pm_domain *pd)
> > +{
> > +}
> > +
> > +static inline struct generic_pm_domain *dt_idle_pd_alloc(
> > +                     struct device_node *np,
> > +                     int (*parse_state)(struct device_node *, u32 *));
>
> In file included from drivers/cpuidle/cpuidle-sbi.c:27:
> drivers/cpuidle/dt_idle_genpd.h:29:1: error: expected identifier or '('
> before '{' token
>    29 | {
>       | ^
>
> Looks like you have a stray semicolon here.

Okay, I will fix this in the next revision.

Regards,
Anup

>
> > +{
> > +     return NULL;
> > +}
> > +
> > +static inline int dt_idle_pd_init_topology(struct device_node *np)
> > +{
> > +     return 0;
> > +}
> > +
> > +static inline struct device *dt_idle_attach_cpu(int cpu, const char *name)
> > +{
> > +     return NULL;
> > +}
> > +
> > +static inline void dt_idle_detach_cpu(struct device *dev)
> > +{
> > +}
> > +
> > +#endif
> > +
> > +#endif
> >
>