linux-kernel - Re: [PATCH v3 15/28] i2c: core: Introduce i2c_get_adapter

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Message-ID: <sk6dwbont52x7zt3woqghurkkkms72f3zxubbadi2gp2yj3sbw@wdstymdtzouc>
Date: Tue, 22 Jul 2025 16:04:31 +0200
From: Andi Shyti <andi.shyti@...nel.org>
To: Herve Codina <herve.codina@...tlin.com>
Cc: Andrew Lunn <andrew@...n.ch>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rafael@...nel.org>, 
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	Luca Ceresoli <luca.ceresoli@...tlin.com>, Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v3 15/28] i2c: core: Introduce i2c_get_adapter_physdev()

Hi Herve,

On Fri, Jun 13, 2025 at 03:47:55PM +0200, Herve Codina wrote:
> The physical device providing an I2C adapter is the device that calls
> i2c_add_adapter() or variants and i2c_del_adapter().
> 
> Most of the time this physical device is the parent of the adapter
> device.
> 
> Exceptions exist with i2c muxes. Indeed, in case of i2c muxes, the
> parent of the mux adapter device points to the adapter device the mux is
> connected to instead of the physical of this mux adapter.
> 
> Introduce i2c_get_adapter_physdev() and a new physdev field in the
> adapter structure in order to ease the adapter physical device
> retrieval.
> 
> Signed-off-by: Herve Codina <herve.codina@...tlin.com>

Makes sense to me,

Reviewed-by: Andi Shyti <andi.shyti@...nel.org>

Thanks,
Andi