linux-kernel - Re: [PATCH v3 3/4] ARM: mvebu: Allow using the GIC for wakeup in standby mode

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Date:	Tue, 28 Jul 2015 11:41:53 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	linux-pm@...r.kernel.org
CC:	Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Lior Amsalem <alior@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/4] ARM: mvebu: Allow using the GIC for wakeup in
 standby mode

Hi,

On 03/07/2015 13:55, 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>

I eventually remove this patch, as now these two flags are part of the GIC driver:
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?h=irq/core&id=0d3f2c92e004c67404fabea19728c1962b777bd6


Gregory


> ---
>  arch/arm/mach-mvebu/board-v7.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm/mach-mvebu/board-v7.c b/arch/arm/mach-mvebu/board-v7.c
> index e5911defccac..b789f7037445 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 +131,13 @@ static int armada_375_external_abort_wa(unsigned long addr, unsigned int fsr,
>  
>  static void __init mvebu_init_irq(void)
>  {
> +	struct device_node *np;
> +
> +	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic");
> +	if (np)
> +		gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE |
> +				      IRQCHIP_MASK_ON_SUSPEND);
> +	of_node_put(np);
>  	irqchip_init();
>  	mvebu_scu_enable();
>  	coherency_init();
> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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