linux-kernel - Re: [PATCH 3/4] mfd: intel_soc_pmic_crc: Set main IRQ domain bus token to DOMAIN_BUS

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Date:   Mon, 31 Jan 2022 17:14:57 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Mark Gross <markgross@...nel.org>,
        Andy Shevchenko <andy@...radead.org>,
        Stephan Gerhold <stephan@...hold.net>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] mfd: intel_soc_pmic_crc: Set main IRQ domain bus
 token to DOMAIN_BUS_NEXUS

On Sat, 25 Dec 2021, Hans de Goede wrote:

> For the CRC PMIC we end up with multiple IRQ domains with the same fwnode.
> One for the irqchip which demultiplexes the actual PMIC interrupt into
> interrupts for the various cells (known as the level 1 interrupts);
> 
> And 2 more for the irqchips which are part of the crystal_cove_gpio
> and crystal_cove_charger cells.
> 
> This leads to the following error being printed when
> CONFIG_GENERIC_IRQ_DEBUGFS is enabled:
>  debugfs: File '\_SB.I2C7.PMIC' in directory 'domains' already present!
> 
> Set the bus token of the main IRQ domain to DOMAIN_BUS_NEXUS to avoid
> this error, this also allows irq_find_matching_fwspec() to find the
> right domain if necessary.
> 
> Note all 3 domain registering drivers need to set the IRQ domain bus token.
> This is necessary because the IRQ domain code defaults to creating
> the debugfs dir with just the fwnode name and then renames it when
> the bus token is set. So each one starts with the same default name and
> all 3 must be given a different name to avoid problems when one of the
> other drivers loads and starts with the same default name.
> 
> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
> ---
>  drivers/mfd/intel_soc_pmic_core.c | 4 ++++
>  1 file changed, 4 insertions(+)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Principal Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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