linux-kernel - Re: [RFC PATCH v5 01/14] i2c: tegra: Don't mark VI I2C as IRQ safe runtime PM

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Message-ID: <20200728163337.GA3736@ninjato>
Date:   Tue, 28 Jul 2020 18:33:37 +0200
From:   Wolfram Sang <wsa@...nel.org>
To:     Sowjanya Komatineni <skomatineni@...dia.com>
Cc:     thierry.reding@...il.com, jonathanh@...dia.com, frankc@...dia.com,
        hverkuil@...all.nl, sakari.ailus@....fi, robh+dt@...nel.org,
        helen.koike@...labora.com, digetx@...il.com, sboyd@...nel.org,
        gregkh@...uxfoundation.org, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org
Subject: Re: [RFC PATCH v5 01/14] i2c: tegra: Don't mark VI I2C as IRQ safe
 runtime PM

On Mon, Jul 27, 2020 at 01:57:19PM -0700, Sowjanya Komatineni wrote:
> Tegra VI I2C is part of VE power domain and typically used for
> camera usecases.
> 
> VE power domain is not always on and is non-IRQ safe. So, IRQ safe
> device cannot be attached to a non-IRQ safe domain as it prevents
> powering off the PM domain and generic power domain driver will warn.
> 
> Current driver marks all I2C devices as IRQ safe and VI I2C device
> does not require IRQ safe as it will not be used for atomic transfers.
> 
> This patch has fix to make VI I2C as non-IRQ safe.
> 
> Reviewed-by: Dmitry Osipenko <digetx@...il.com>
> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>

Applied to for-next, thanks!


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