Re: [PATCH 4/6] irqchip: add irqchip driver for nuc900

From: Wan Zongshun <vw@iommu.org>
To: Arnd Bergmann <arnd@arndb.de>, linux-arm-kernel@lists.infradead.org
Cc: devicetree@vger.kernel.org, Wan Zongshun <mcuos.com@gmail.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Russell King <linux@armlinux.org.uk>,
	linux-kernel@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 4/6] irqchip: add irqchip driver for nuc900
Date: Tue, 5 Jul 2016 15:47:25 +0800	[thread overview]
Message-ID: <577B660D.50908@iommu.org> (raw)
In-Reply-To: <8706947.5rzUDVsB2F@wuerfel>

On 2016年06月29日 23:27, Arnd Bergmann wrote:
> On Saturday, June 25, 2016 6:37:20 PM CEST Wan Zongshun wrote:
>> +#define IRQ_WDT		W90X900_IRQ(1)
>> +#define IRQ_WWDT	W90X900_IRQ(2)
>> +#define IRQ_LVD		W90X900_IRQ(3)
>> +#define IRQ_EXT0	W90X900_IRQ(4)
>> +#define IRQ_EXT1	W90X900_IRQ(5)
>> +#define IRQ_EXT2	W90X900_IRQ(6)
>> +#define IRQ_EXT3	W90X900_IRQ(7)
>> +#define IRQ_EXT4	W90X900_IRQ(8)
>> +#define IRQ_EXT5	W90X900_IRQ(9)
>> +#define IRQ_EXT6	W90X900_IRQ(10)
>
> I'd suggest dropping the list, the contents are now in the dts.

Do you think I should put one irqmap header file into this
/arch/arm/boot/dts/include/dt-bindings folder, or I should removed those 
irqnumber map anywhere, just hardcode the irqnumber in dts file?

>
>> diff --git a/arch/arm/mach-w90x900/include/mach/nuc970-regs-aic.h b/arch/arm/mach-w90x900/include/mach/nuc970-regs-aic.h
>> new file mode 100644
>> index 0000000..7a77016
>> --- /dev/null
>> +++ b/arch/arm/mach-w90x900/include/mach/nuc970-regs-aic.h
>> @@ -0,0 +1,53 @@
>> +#ifndef __ASM_ARCH_REGS_AIC_H
>> +#define __ASM_ARCH_REGS_AIC_H
>> +
>> +/*NUC970 AIC regs*/
>> +
>> +#define	REG_AIC_SCR1	0x00
>> +#define	REG_AIC_SCR2	0x04
>> +#define	REG_AIC_SCR3	0x08
>> +#define	REG_AIC_SCR4	0x0C
>> +#define	REG_AIC_SCR5	0x10
>
> And like the clk driver, these should all be in the irqchip driver instead
> of a separate header.

Ok, changed.
>
>> +
>> +static void __iomem *aic_base;
>> +static struct irq_domain *aic_domain;
>> +#define MAKE_HWIRQ(irqnum)	(irqnum)
>
> The macro appears to be unused.
removed it.
>
>> +static void nuc970_irq_mask(struct irq_data *d)
>> +{
>> +	if (d->irq < 32)
>> +		__raw_writel(1 << (d->irq), aic_base + REG_AIC_MDCR);
>> +	else
>> +		__raw_writel(1 << (d->irq - 32), aic_base + REG_AIC_MDCRH);
>> +}
>
> writel()
>
> 	Arnd
>
>
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