linux-kernel - Re: [PATCH v2 3/4] ARM: mvebu: Allow using the GIC for wakeup in standby mode

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Date:	Wed, 01 Jul 2015 17:05:33 +0100
From:	Sudeep Holla <sudeep.holla@....com>
To:	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
CC:	Sudeep Holla <sudeep.holla@....com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Nadav Haklai <nadavh@...vell.com>,
	Lior Amsalem <alior@...vell.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 3/4] ARM: mvebu: Allow using the GIC for wakeup in
 standby mode



On 30/06/15 18:18, Gregory CLEMENT wrote:
> On the Armada 375/38x/39x SoCs, in standby mode the SoCs stay powered
> and it is possible to wake-up from any interrupt sources. This patch
> adds flag to the GIC irqchip driver to let linux know this.
>
> Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
> ---
>   arch/arm/mach-mvebu/board-v7.c | 7 +++++++
>   1 file changed, 7 insertions(+)
>
> diff --git a/arch/arm/mach-mvebu/board-v7.c b/arch/arm/mach-mvebu/board-v7.c
> index e5911defccac..f446230e7416 100644
> --- a/arch/arm/mach-mvebu/board-v7.c
> +++ b/arch/arm/mach-mvebu/board-v7.c
> @@ -18,6 +18,7 @@
>   #include <linux/of_address.h>
>   #include <linux/of_fdt.h>
>   #include <linux/of_platform.h>
> +#include <linux/irq.h>
>   #include <linux/io.h>
>   #include <linux/clocksource.h>
>   #include <linux/dma-mapping.h>
> @@ -26,6 +27,7 @@
>   #include <linux/signal.h>
>   #include <linux/slab.h>
>   #include <linux/irqchip.h>
> +#include <linux/irqchip/arm-gic.h>
>   #include <asm/hardware/cache-l2x0.h>
>   #include <asm/mach/arch.h>
>   #include <asm/mach/map.h>
> @@ -129,6 +131,11 @@ static int armada_375_external_abort_wa(unsigned long addr, unsigned int fsr,
>
>   static void __init mvebu_init_irq(void)
>   {
> +	if (of_machine_is_compatible("marvell,armada375") ||
> +	    of_machine_is_compatible("marvell,armada380") ||
> +	    of_machine_is_compatible("marvell,armada390"))
> +		gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE |
> +				      IRQCHIP_MASK_ON_SUSPEND);

I am planning to add these flags in the GIC driver itself and remove
this function. I will post the patch next week once merge window closes
next, so based on how that discussion proceeds you may have drop this
patch, just heads up.

Regards,
Sudeep
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