linux-kernel - Re: [PATCH v2 RESEND 2/8] irqchip: Supply new driver for STi based devices

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Date:	Fri, 23 Jan 2015 16:32:31 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel@...inux.com, jason@...edaemon.net,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v2 RESEND 2/8] irqchip: Supply new driver for STi based
 devices

On Fri, 23 Jan 2015, Thomas Gleixner wrote:
> On Thu, 22 Jan 2015, Lee Jones wrote:
> 
> > This driver is used to enable System Configuration Register controlled
> > External, CTI (Core Sight), PMU (Performance Management), and PL310 L2
> > Cache IRQs prior to use.
> 
> I'm wondering how this is related to irq_chip, 

It doesn't really.  At least, it doesn't make use of the framework.  
It was the most relevant subsystem.

> but well, I don't mind it being parked here.

Thanks Thomas.  I was hoping for that response.

> Though I really cannot say anything about this DT translation
> machinery for a single sysconfig register, other than it looks
> completely overengineered to me.

I understnad where you're coming from, but don't all drivers just
'twiddle some register bits'?

> The only technical comment I have is: shouldn't all the stuff except
> the resume function be marked __init or is any of this required post
> init?

It's not common to mark functions invoked at and affter *_probe() as
__init.  At least, not as far as I'm aware.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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