linux-kernel - Re: [PATCH 25/35] ARM: davinci: cp-intc: use the new-style config structure

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Message-ID: <CAMpxmJWSJQyb+36ZEurULT+Bh306kiqXxkwUg_Yg-Jzu4GEpFQ@mail.gmail.com>
Date:   Fri, 8 Feb 2019 17:27:21 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     David Lechner <david@...hnology.com>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>, Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 25/35] ARM: davinci: cp-intc: use the new-style config structure

wt., 5 lut 2019 o 01:29 David Lechner <david@...hnology.com> napisał(a):
>
> On 1/31/19 7:39 AM, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> >
> > Modify the cp-intc driver to take all its configuration from the new
> > config structure. Stop referencing davinci_soc_info in any way.
> > Move the declaration for davinci_cp_intc_init() to
> > irq-davinci-cp-intc.h and make it take the new config structure as
> > parameter. Convert all users to the new version.
> >
> > Also: since the two da8xx SoCs default all irq priorities to 7, just
> > drop the priority configuration at all and hardcode the channels to 7.
>
> As mentioned in a comment on a different patch, this isn't strictly
> true (although in practice, it probably is).
>
> This patch deletes a code path with the comment "Default everything
> to channel 15 if priority not specified.", so it is possible (although
> unlikely) that this patch could change a priority of some IRQ that is
> being used.
>

This only happens if no priorities are specified. Otherwise we just
iterate over the provided array and set priorities for all interrupts.

Bart

> >
> > It will simplify the driver code and make our lives easier when it
> > comes to device-tree support.
> >
> > Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> > ---