linux-kernel - Re: [PATCH v6 04/15] spmi: pmic-arb: convert to v2 irq interfaces to support hierarchical IRQ chips

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Message-ID: <86k1iza7mr.wl-marc.zyngier@arm.com>
Date:   Sun, 20 Jan 2019 11:30:36 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     Brian Masney <masneyb@...tation.org>
Cc:     linus.walleij@...aro.org, sboyd@...nel.org,
        bjorn.andersson@...aro.org, andy.gross@...aro.org,
        shawnguo@...nel.org, dianders@...omium.org,
        linux-gpio@...r.kernel.org, nicolas.dechesne@...aro.org,
        niklas.cassel@...aro.org, david.brown@...aro.org,
        robh+dt@...nel.org, mark.rutland@....com, thierry.reding@...il.com,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v6 04/15] spmi: pmic-arb: convert to v2 irq interfaces to support hierarchical IRQ chips

On Sat, 19 Jan 2019 20:42:41 +0000,
Brian Masney <masneyb@...tation.org> wrote:
> 
> Convert the spmi-pmic-arb IRQ code to use the version 2 IRQ interface
> in order to support hierarchical IRQ chips. This is necessary so that
> spmi-gpio can be setup as a hierarchical IRQ chip with pmic-arb as the
> parent. IRQ chips in device tree should be usable from the start without
> the consumer having to make an additional call to gpio[d]_to_irq() to
> get the proper IRQ on the parent.
> 
> The old qpnpint_irq_domain_map function would hardcode the handler as
> handle_level_irq, however qpnpint_irq_set_type would later override the
> handler. Properly set the handler when the IRQ is mapped. This new code
> doesn't return an error for IRQ_TYPE_NONE and preserves the existing
> behavior of using handle_level_irq since there are some broken device
> tree bindings that need to be corrected first.
> 
> Driver was tested on a LG Nexus 5 (hammerhead) phone.
> 
> Signed-off-by: Brian Masney <masneyb@...tation.org>
> ---
> The broken device tree bindings are corrected in this patch series and
> additional validation to the type field is added later in the series.
> 
> Changes since v5:
> - Properly set handler to edge or level when the IRQ is mapped.
> 
> Changes since v4:
> - None
> 
> Changes since v3:
> - None
> 
> Changes since v2:
> - Don't move pmic_gpio_of_match block. Use device_get_match_data instead
>   of of_match_device.
> - Correct build warning on arm64: warning: cast from pointer to integer
>   of different size
> 
>  drivers/spmi/spmi-pmic-arb.c | 67 +++++++++++++++++++++++++-----------
>  1 file changed, 47 insertions(+), 20 deletions(-)

Reviewed-by: Marc Zyngier <marc.zyngier@....com>

Thanks,

	M.

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