From: Sudeep Holla <sudeep.holla@arm.com>
To: Ulf Hansson <ulf.hansson@linaro.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Kevin Hilman <khilman@baylibre.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Sudeep Holla <sudeep.holla@arm.com>
Subject: [QUERY] AMBA: PM domains when !CONFIG_PM
Date: Thu, 16 Jun 2016 12:19:13 +0100 [thread overview]
Message-ID: <57628B31.3090901@arm.com> (raw)
Hi Ulf, Kevin,
I have a situation where we need to enable the power domain to access an
AMBA device. This is all fine with patches from Ulf and Marek in amba/bus.c
The problem is when we disable CONFIG_PM, dev_pm_domain_attach
returns -ENODEV irrespective of whether a DT node has a PM domain
in it or not. If dev_pm_domain_attach returns anything other than
-EPROBE_DEFER, we ignore the error and proceed to access the device
which will explode.
Basically, we need a way to prevent addition of that amba device if DT
node has PD specified but CONFIG_PM=n. Any thoughts ?
--
Regards,
Sudeep
WARNING: multiple messages have this Message-ID (diff)
From: sudeep.holla@arm.com (Sudeep Holla)
To: linux-arm-kernel@lists.infradead.org
Subject: [QUERY] AMBA: PM domains when !CONFIG_PM
Date: Thu, 16 Jun 2016 12:19:13 +0100 [thread overview]
Message-ID: <57628B31.3090901@arm.com> (raw)
Hi Ulf, Kevin,
I have a situation where we need to enable the power domain to access an
AMBA device. This is all fine with patches from Ulf and Marek in amba/bus.c
The problem is when we disable CONFIG_PM, dev_pm_domain_attach
returns -ENODEV irrespective of whether a DT node has a PM domain
in it or not. If dev_pm_domain_attach returns anything other than
-EPROBE_DEFER, we ignore the error and proceed to access the device
which will explode.
Basically, we need a way to prevent addition of that amba device if DT
node has PD specified but CONFIG_PM=n. Any thoughts ?
--
Regards,
Sudeep
next reply other threads:[~2016-06-16 11:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 11:19 Sudeep Holla [this message]
2016-06-16 11:19 ` [QUERY] AMBA: PM domains when !CONFIG_PM Sudeep Holla
[not found] ` <CAPDyKFoV5Y1mHuDZmWgynCicux2deV89npp-siTQDJr0uZFwcg@mail.gmail.com>
2016-06-16 12:47 ` Sudeep Holla
2016-06-16 12:47 ` Sudeep Holla
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