linux-kernel - Re: [PATCH v3 4/5] irqchip: gicv3-its: define macros for GITS

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Message-ID: <54F84534.3000900@arm.com>
Date:	Thu, 05 Mar 2015 11:59:48 +0000
From:	Marc Zyngier <marc.zyngier@....com>
To:	Yun Wu <wuyun.wu@...wei.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"jason@...edaemon.net" <jason@...edaemon.net>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 4/5] irqchip: gicv3-its: define macros for GITS_CTLR
 fields

On 04/03/15 03:18, Yun Wu wrote:
> Define macros for GITS_CTLR fields to avoid using magic numbers.
> 
> Signed-off-by: Yun Wu <wuyun.wu@...wei.com>

Acked-by: Marc Zyngier <marc.zyngier@....com>

	M.

> ---
>  drivers/irqchip/irq-gic-v3-its.c   | 2 +-
>  include/linux/irqchip/arm-gic-v3.h | 3 +++
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
> index e8bda0b..d13c24e 100644
> --- a/drivers/irqchip/irq-gic-v3-its.c
> +++ b/drivers/irqchip/irq-gic-v3-its.c
> @@ -1388,7 +1388,7 @@ static int its_probe(struct device_node *node, struct irq_domain *parent)
>  	writeq_relaxed(baser, its->base + GITS_CBASER);
>  	tmp = readq_relaxed(its->base + GITS_CBASER);
>  	writeq_relaxed(0, its->base + GITS_CWRITER);
> -	writel_relaxed(1, its->base + GITS_CTLR);
> +	writel_relaxed(GITS_CTLR_ENABLE, its->base + GITS_CTLR);
> 
>  	if ((tmp ^ baser) & GITS_BASER_SHAREABILITY_MASK) {
>  		pr_info("ITS: using cache flushing for cmd queue\n");
> diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
> index 3459b43..c9d3002 100644
> --- a/include/linux/irqchip/arm-gic-v3.h
> +++ b/include/linux/irqchip/arm-gic-v3.h
> @@ -134,6 +134,9 @@
> 
>  #define GITS_TRANSLATER			0x10040
> 
> +#define GITS_CTLR_ENABLE		(1U << 0)
> +#define GITS_CTLR_QUIESCENT		(1U << 31)
> +
>  #define GITS_TYPER_DEVBITS_SHIFT	13
>  #define GITS_TYPER_DEVBITS(r)		((((r) >> GITS_TYPER_DEVBITS_SHIFT) & 0x1f) + 1)
>  #define GITS_TYPER_PTA			(1UL << 19)
> --
> 1.8.0
> 
> 
> 


-- 
Jazz is not dead. It just smells funny...
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