From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
To: Sudeep Holla <sudeep.holla@arm.com>,
Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>,
"linux-samsung-soc@vger.kernel.org"
<linux-samsung-soc@vger.kernel.org>,
Jason Cooper <jason@lakedaemon.net>,
Chanho Park <parkch98@gmail.com>,
Doug Anderson <dianders@chromium.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Kukjin Kim <kgene@kernel.org>,
Peter Chubb <peter.chubb@nicta.com.au>,
Shuah Khan <shuahkhan@gmail.com>,
Tomasz Figa <tomasz.figa@gmail.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v2 1/1] irqchip: exynos-combiner: Save IRQ enable set on suspend
Date: Fri, 12 Jun 2015 19:42:27 +0900 [thread overview]
Message-ID: <557AB793.1060809@samsung.com> (raw)
In-Reply-To: <557AB00C.5040606@arm.com>
On 12.06.2015 19:10, Sudeep Holla wrote:
>
>
> On 12/06/15 06:43, Javier Martinez Canillas wrote:
>> The Exynos interrupt combiner IP loses its state when the SoC enters
>> into a low power state during a Suspend-to-RAM. This means that if a
>> IRQ is used as a source, the interrupts for the devices are disabled
>> when the system is resumed from a sleep state so are not triggered.
>>
>> Save the interrupt enable set register for each combiner group and
>> restore it after resume to make sure that the interrupts are enabled.
>>
>
> Not sure if you need this. IMO it's not clean and redundant though I
> admit many drivers do exactly same thing. I am trying to remove or point
> out those redundant code as irqchip core has options/flags to do what
> you need. I assume there are no wakeup sources connected to this
> combiner.
It may have wake up sources connected. Correct me if I am wrong but (at
least) on Exynos5250 combiner takes care of gpx1 GPIO pins which may be
external interrupts (e.g. power key on Exynos5250 Snow). I didn't check
other boards.
Best regards,
Krzysztof
> Setting irqchip flags should solve this problem. A simple
> patch below should do the job ?
>
> -->8
>
> diff --git a/drivers/irqchip/exynos-combiner.c
> b/drivers/irqchip/exynos-combiner.c
> index 5945223b73fa..c0bcec59f829 100644
> --- a/drivers/irqchip/exynos-combiner.c
> +++ b/drivers/irqchip/exynos-combiner.c
> @@ -111,6 +111,7 @@ static struct irq_chip combiner_chip = {
> #ifdef CONFIG_SMP
> .irq_set_affinity = combiner_set_affinity,
> #endif
> + .flags = IRQCHIP_MASK_ON_SUSPEND,
> };
>
>
>
WARNING: multiple messages have this Message-ID (diff)
From: k.kozlowski@samsung.com (Krzysztof Kozlowski)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/1] irqchip: exynos-combiner: Save IRQ enable set on suspend
Date: Fri, 12 Jun 2015 19:42:27 +0900 [thread overview]
Message-ID: <557AB793.1060809@samsung.com> (raw)
In-Reply-To: <557AB00C.5040606@arm.com>
On 12.06.2015 19:10, Sudeep Holla wrote:
>
>
> On 12/06/15 06:43, Javier Martinez Canillas wrote:
>> The Exynos interrupt combiner IP loses its state when the SoC enters
>> into a low power state during a Suspend-to-RAM. This means that if a
>> IRQ is used as a source, the interrupts for the devices are disabled
>> when the system is resumed from a sleep state so are not triggered.
>>
>> Save the interrupt enable set register for each combiner group and
>> restore it after resume to make sure that the interrupts are enabled.
>>
>
> Not sure if you need this. IMO it's not clean and redundant though I
> admit many drivers do exactly same thing. I am trying to remove or point
> out those redundant code as irqchip core has options/flags to do what
> you need. I assume there are no wakeup sources connected to this
> combiner.
It may have wake up sources connected. Correct me if I am wrong but (at
least) on Exynos5250 combiner takes care of gpx1 GPIO pins which may be
external interrupts (e.g. power key on Exynos5250 Snow). I didn't check
other boards.
Best regards,
Krzysztof
> Setting irqchip flags should solve this problem. A simple
> patch below should do the job ?
>
> -->8
>
> diff --git a/drivers/irqchip/exynos-combiner.c
> b/drivers/irqchip/exynos-combiner.c
> index 5945223b73fa..c0bcec59f829 100644
> --- a/drivers/irqchip/exynos-combiner.c
> +++ b/drivers/irqchip/exynos-combiner.c
> @@ -111,6 +111,7 @@ static struct irq_chip combiner_chip = {
> #ifdef CONFIG_SMP
> .irq_set_affinity = combiner_set_affinity,
> #endif
> + .flags = IRQCHIP_MASK_ON_SUSPEND,
> };
>
>
>
next prev parent reply other threads:[~2015-06-12 10:42 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-12 5:43 [PATCH v2 1/1] irqchip: exynos-combiner: Save IRQ enable set on suspend Javier Martinez Canillas
2015-06-12 5:43 ` Javier Martinez Canillas
2015-06-12 5:57 ` Krzysztof Kozlowski
2015-06-12 5:57 ` Krzysztof Kozlowski
2015-06-12 10:10 ` Sudeep Holla
2015-06-12 10:10 ` Sudeep Holla
2015-06-12 10:42 ` Krzysztof Kozlowski [this message]
2015-06-12 10:42 ` Krzysztof Kozlowski
2015-06-12 10:56 ` Sudeep Holla
2015-06-12 10:56 ` Sudeep Holla
2015-06-12 11:27 ` Javier Martinez Canillas
2015-06-12 11:27 ` Javier Martinez Canillas
2015-06-12 11:54 ` Sudeep Holla
2015-06-12 11:54 ` Sudeep Holla
2015-06-12 12:57 ` Javier Martinez Canillas
2015-06-12 12:57 ` Javier Martinez Canillas
2015-06-12 19:36 ` Javier Martinez Canillas
2015-06-12 19:36 ` Javier Martinez Canillas
2015-06-12 20:17 ` Doug Anderson
2015-06-12 20:17 ` Doug Anderson
2015-06-15 7:46 ` Javier Martinez Canillas
2015-06-15 7:46 ` Javier Martinez Canillas
2015-06-15 9:01 ` Sudeep Holla
2015-06-15 9:01 ` Sudeep Holla
2015-06-15 15:00 ` Javier Martinez Canillas
2015-06-15 15:00 ` Javier Martinez Canillas
2015-06-15 15:08 ` Sudeep Holla
2015-06-15 15:08 ` Sudeep Holla
2015-06-15 15:23 ` Javier Martinez Canillas
2015-06-15 15:23 ` Javier Martinez Canillas
2015-06-15 23:57 ` Krzysztof Kozlowski
2015-06-15 23:57 ` Krzysztof Kozlowski
2015-06-16 3:19 ` Javier Martinez Canillas
2015-06-16 3:19 ` Javier Martinez Canillas
2015-06-16 8:21 ` Thomas Gleixner
2015-06-16 8:21 ` Thomas Gleixner
2015-06-16 12:32 ` Tomasz Figa
2015-06-16 12:32 ` Tomasz Figa
2015-06-16 13:11 ` Sudeep Holla
2015-06-16 13:11 ` Sudeep Holla
2015-06-15 8:52 ` Sudeep Holla
2015-06-15 8:52 ` Sudeep Holla
2015-06-16 9:36 ` [tip:irq/core] " tip-bot for Javier Martinez Canillas
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