linux-kernel - Re: [PATCH v2 06/10] irqchip: Add driver for WPCM450 interrupt controller

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Date:   Wed, 07 Apr 2021 12:11:21 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Jonathan Neuschäfer <j.neuschaefer@....net>
Cc:     openbmc@...ts.ozlabs.org, Tomer Maimon <tmaimon77@...il.com>,
        Joel Stanley <joel@....id.au>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Avi Fishman <avifishman70@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Russell King <linux@...linux.org.uk>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v2 06/10] irqchip: Add driver for WPCM450 interrupt controller

On Tue, 06 Apr 2021 13:09:17 +0100,
Jonathan Neuschäfer <j.neuschaefer@....net> wrote:
> 
> The WPCM450 AIC ("Advanced Interrupt Controller") is the interrupt
> controller found in the Nuvoton WPCM450 SoC and other Winbond/Nuvoton
> SoCs.
> 
> The list of registers if based on the AMI vendor kernel and the
> Nuvoton W90N745 datasheet.
> 
> Although the hardware supports other interrupt modes, the driver only
> supports high-level interrupts at the moment, because other modes could
> not be tested so far.
> 
> Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@....net>
> ---
> 
> v2:
> - Rename IRQS macro to AIC_NUM_IRQS
> - Fix IRQ range check
> - Use linux/printk.h header instead of linux/console.h
> - Add AIC_SCR_PRIORITY_MASK constant
> - Add missing register descriptions
> - Remove superfluous printk about IRQ flow type mismatch
> - Use BIT() macro
> - Rename _ack function to _eoi for accuracy, and use handle_fasteoi_irq
> ---
>  arch/arm/mach-npcm/Kconfig        |   1 +
>  drivers/irqchip/Kconfig           |   6 ++
>  drivers/irqchip/Makefile          |   1 +
>  drivers/irqchip/irq-wpcm450-aic.c | 161 ++++++++++++++++++++++++++++++
>  4 files changed, 169 insertions(+)
>  create mode 100644 drivers/irqchip/irq-wpcm450-aic.c
> 
> diff --git a/arch/arm/mach-npcm/Kconfig b/arch/arm/mach-npcm/Kconfig
> index 658c8efb4ca14..a71cf1d189ae5 100644
> --- a/arch/arm/mach-npcm/Kconfig
> +++ b/arch/arm/mach-npcm/Kconfig
> @@ -10,6 +10,7 @@ config ARCH_WPCM450
>  	bool "Support for WPCM450 BMC (Hermon)"
>  	depends on ARCH_MULTI_V5
>  	select CPU_ARM926T
> +	select WPCM450_AIC
>  	select NPCM7XX_TIMER
>  	help
>  	  General support for WPCM450 BMC (Hermon).

I can't take this patch with this particular hunk, as I don't have
this file in my tree. I can either drop this line, or delay the
merging of this patch to a later point in time.

The driver otherwise looks ready.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.