linux-kernel - Re: [patch v14 2/4] irqchip/qeic: merge qeic init code from platforms to a common function

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Message-ID: <865zs7s42q.wl-marc.zyngier@arm.com>
Date:   Mon, 25 Mar 2019 09:20:29 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     Qiang Zhao <qiang.zhao@....com>
Cc:     "tglx@...utronix.de" <tglx@...utronix.de>,
        "jason@...edaemon.net" <jason@...edaemon.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [patch v14 2/4] irqchip/qeic: merge qeic init code from platforms to a common function

On Mon, 25 Mar 2019 03:53:37 +0000,
Qiang Zhao <qiang.zhao@....com> wrote:
> 
> The codes of qe_ic init from a variety of platforms are redundant,
> merge them to a common function and put it to irqchip/irq-qeic.c
> 
> For non-p1021_mds mpc85xx_mds boards, use "qe_ic_init(np, 0,
> qe_ic_cascade_low_mpic, qe_ic_cascade_high_mpic);" instead of
> "qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);".
> 
> qe_ic_cascade_muxed_mpic was used for boards has the same interrupt
> number for low interrupt and high interrupt, qe_ic_init has checked
> if "low interrupt == high interrupt"
> 
> Signed-off-by: Zhao Qiang <qiang.zhao@....com>
> ---
>  arch/powerpc/platforms/83xx/misc.c            |   15 ---------------
>  arch/powerpc/platforms/85xx/corenet_generic.c |    9 ---------
>  arch/powerpc/platforms/85xx/mpc85xx_mds.c     |   14 --------------
>  arch/powerpc/platforms/85xx/mpc85xx_rdb.c     |   16 ----------------
>  arch/powerpc/platforms/85xx/twr_p102x.c       |   14 --------------
>  drivers/irqchip/irq-qeic.c                    |   13 +++++++++++++
>  6 files changed, 13 insertions(+), 68 deletions(-)
> 
> diff --git a/arch/powerpc/platforms/83xx/misc.c b/arch/powerpc/platforms/83xx/misc.c
> index 2b6589f..4150b56 100644

[...]

> diff --git a/drivers/irqchip/irq-qeic.c b/drivers/irqchip/irq-qeic.c
> index aba7135..673afb4 100644
> --- a/drivers/irqchip/irq-qeic.c
> +++ b/drivers/irqchip/irq-qeic.c
> @@ -18,6 +18,7 @@
>  #include <linux/of_address.h>
>  #include <linux/kernel.h>
>  #include <linux/init.h>
> +#include <linux/irqchip.h>
>  #include <linux/errno.h>
>  #include <linux/reboot.h>
>  #include <linux/slab.h>
> @@ -598,4 +599,16 @@ static int __init init_qe_ic_sysfs(void)
>  	return 0;
>  }
>  
> +static int __init qeic_of_init(struct device_node *node,
> +			       struct device_node *parent)
> +{
> +	if (!node)
> +		return -ENODEV;

How can node be NULL here?

> +	qe_ic_init(node, 0, qe_ic_cascade_low_mpic,
> +		   qe_ic_cascade_high_mpic);
> +	of_node_put(node);
> +	return 0;
> +}
> +
> +IRQCHIP_DECLARE(qeic, "fsl,qe-ic", qeic_of_init);
>  subsys_initcall(init_qe_ic_sysfs);
> -- 
> 1.7.1
> 

Thanks,

	M.

-- 
Jazz is not dead, it just smell funny.