LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Olof Johansson <olof@lixom.net>,
	Grant Likely <grant.likely@linaro.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Mark Rutland <mark.rutland@arm.com>,
	Graeme Gregory <graeme.gregory@linaro.org>,
	Sudeep Holla <Sudeep.Holla@arm.com>, Jon Masters <jcm@redhat.com>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Mark Brown <broonie@kernel.org>, Robert Richter <rric@kernel.org>,
	Timur Tabi <timur@codeaurora.org>,
	Ashwin Chaugule <ashwinc@codeaurora.org>,
	suravee.suthikulpanit@amd.com, linux-acpi@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linaro-acpi@lists.linaro.org,
	Tomasz Nowicki <tomasz.nowicki@linaro.org>
Subject: Re: [update][PATCH v10 06/21] ACPI / sleep: Introduce CONFIG_ACPI_GENERIC_SLEEP
Date: Tue, 17 Mar 2015 00:15:48 +0100	[thread overview]
Message-ID: <5704037.pUGdJ0Q9hF@vostro.rjw.lan> (raw)
In-Reply-To: <5506C93C.704@linaro.org>

On Monday, March 16, 2015 08:14:52 PM Hanjun Guo wrote:
> On 2015年03月14日 05:49, Rafael J. Wysocki wrote:
> > On Friday, March 13, 2015 04:14:29 PM Hanjun Guo wrote:
> >> From: Graeme Gregory <graeme.gregory@linaro.org>
> >>
> >> ACPI 5.1 does not currently support S states for ARM64 hardware but
> >> ACPI code will call acpi_target_system_state() and acpi_sleep_init()
> >> for device power management, so introduce CONFIG_ACPI_GENERIC_SLEEP
> >> and select it for x86 and ia64 only to make sleep functions available,
> >> and also introduce stub function to allow other drivers to function
> >> until S states are defined for ARM64.
> >>
> >> It will be no functional change for x86 and IA64.
> >>
> >> CC: Rafael J. Wysocki <rjw@rjwysocki.net>
> >> Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> >> Acked-by: Robert Richter <rrichter@cavium.com>
> >> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> >> Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
> >> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
> >> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
> >> ---
> >>   arch/ia64/Kconfig       | 1 +
> >>   arch/x86/Kconfig        | 1 +
> >>   drivers/acpi/Kconfig    | 4 ++++
> >>   drivers/acpi/Makefile   | 2 +-
> >>   drivers/acpi/internal.h | 4 ++++
> >>   5 files changed, 11 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
> >> index 074e52b..e8728d7 100644
> >> --- a/arch/ia64/Kconfig
> >> +++ b/arch/ia64/Kconfig
> >> @@ -10,6 +10,7 @@ config IA64
> >>   	select ARCH_MIGHT_HAVE_PC_SERIO
> >>   	select PCI if (!IA64_HP_SIM)
> >>   	select ACPI if (!IA64_HP_SIM)
> >> +	select ACPI_GENERIC_SLEEP if ACPI
> >>   	select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
> >>   	select HAVE_UNSTABLE_SCHED_CLOCK
> >>   	select HAVE_IDE
> >> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> >> index b7d31ca..9804431 100644
> >> --- a/arch/x86/Kconfig
> >> +++ b/arch/x86/Kconfig
> >> @@ -22,6 +22,7 @@ config X86_64
> >>   ### Arch settings
> >>   config X86
> >>   	def_bool y
> >> +	select ACPI_GENERIC_SLEEP if ACPI
> >
> > One more nit.  If you did
> >
> > +	select ACPI_GENERIC_SLEEP if ACPI_SLEEP
> >
> > here (and above for ia64), you'd avoid having to make ACPI_SLEEP
> > depend on ACPI_GENERIC_SLEEP which goes somewhat backwards.
> 
> In sleep.c,
> 
> #ifdef CONFIG_ACPI_SLEEP
> acpi_target_system_state()
> {
> }
> #endif
> 
> and CONFIG_ACPI_SLEEP depends on SUSPEND || HIBERNATION,
> which one of them will be enabled on ARM64 so ACPI_SLEEP
> will also enabled too.
> 
> So if we
> 
> +select ACPI_GENERIC_SLEEP if ACPI_SLEEP
> 
> and
> 
> +acpi-$(CONFIG_ACPI_GENERIC_SLEEP) += sleep.o
> 
> it will lead to errors for acpi_target_system_state() that
> is declared but not defined, so I will keep the code as
> it is, what do you think?

No, we need to hash this out.  Having two different Kconfig options meaning
almost the same thing (ACPI_SLEEP and ACPI_GENERIC_SLEEP) is beyond ugly.

Do you need ACPI_SLEEP on ARM64 at all?


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.

  reply	other threads:[~2015-03-16 22:52 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-13  8:14 Hanjun Guo
2015-03-13 21:49 ` Rafael J. Wysocki
2015-03-16 12:14   ` Hanjun Guo
2015-03-16 23:15     ` Rafael J. Wysocki [this message]
2015-03-17  1:08       ` Hanjun Guo
2015-03-17  2:28         ` Rafael J. Wysocki
2015-03-17  2:36           ` Hanjun Guo
2015-03-17  3:23             ` Rafael J. Wysocki
2015-03-17  4:10               ` Hanjun Guo
2015-03-17  5:59                 ` Jon Masters
2015-03-17  6:31                   ` Hanjun Guo
2015-03-17 14:33                 ` Rafael J. Wysocki
2015-03-18  1:56                   ` Hanjun Guo
2015-03-17 12:35               ` Lorenzo Pieralisi
     [not found]                 ` <CAGHbJ3DhUB688K7ooT7ai=2QjRp7S+_E_Y+a+GupeTvjR5omMg@mail.gmail.com>
2015-03-17 14:29                   ` [PATCH] ACPI / sleep: Drop acpi_suspend() which is not used Rafael J. Wysocki
2015-03-17 14:24                     ` Lorenzo Pieralisi
2015-03-18  1:17                     ` Hanjun Guo
2015-03-17 14:30                 ` [update][PATCH v10 06/21] ACPI / sleep: Introduce CONFIG_ACPI_GENERIC_SLEEP Rafael J. Wysocki

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=5704037.pUGdJ0Q9hF@vostro.rjw.lan \
    --to=rjw@rjwysocki.net \
    --cc=Lorenzo.Pieralisi@arm.com \
    --cc=Sudeep.Holla@arm.com \
    --cc=arnd@arndb.de \
    --cc=ashwinc@codeaurora.org \
    --cc=broonie@kernel.org \
    --cc=catalin.marinas@arm.com \
    --cc=graeme.gregory@linaro.org \
    --cc=grant.likely@linaro.org \
    --cc=hanjun.guo@linaro.org \
    --cc=jcm@redhat.com \
    --cc=linaro-acpi@lists.linaro.org \
    --cc=linux-acpi@vger.kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=marc.zyngier@arm.com \
    --cc=mark.rutland@arm.com \
    --cc=olof@lixom.net \
    --cc=rric@kernel.org \
    --cc=suravee.suthikulpanit@amd.com \
    --cc=timur@codeaurora.org \
    --cc=tomasz.nowicki@linaro.org \
    --cc=will.deacon@arm.com \
    --subject='Re: [update][PATCH v10 06/21] ACPI / sleep: Introduce CONFIG_ACPI_GENERIC_SLEEP' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).