linux-kernel - Re: [PATCH v6 2/3] of: factor arguments passed to of_map

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Message-ID: <21b3f41a-d480-4eb1-a02e-c2ae411f3dd9@oss.qualcomm.com>
Date: Wed, 21 Jan 2026 12:06:50 +0530
From: Vijayanand Jitta <vijayanand.jitta@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: robin.murphy@....com, will@...nel.org, joro@...tes.org, robh@...nel.org,
        konrad.dybcio@....qualcomm.com, bjorn.andersson@....qualcomm.com,
        bod@...nel.org, conor+dt@...nel.org, krzk+dt@...nel.org,
        prakash.gupta@....qualcomm.com, vikash.garodia@....qualcomm.com,
        iommu@...ts.linux.dev, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        Charan Teja Kalla <charan.kalla@....qualcomm.com>
Subject: Re: [PATCH v6 2/3] of: factor arguments passed to of_map_id() into a
 struct



On 1/21/2026 11:30 AM, Dmitry Baryshkov wrote:
> On Wed, 21 Jan 2026 at 07:54, Vijayanand Jitta
> <vijayanand.jitta@....qualcomm.com> wrote:
>>
>> From: Charan Teja Kalla <charan.kalla@....qualcomm.com>
>>
>> Introduce a new struct type where the optional arguments passed to
>> of_map_id() are Currently embedded as of_phandle_args struct.
>> Subsequent patches add additional arguments to the struct that the
>> caller expects to be filled of_map_id().
> 
> Which additional arguments? I don't see anything being added in 3/3 of
> this series.
> 
> Can we use of_phandle_args and switch to of_map_id_args when it's
> actually required.
> 

As mentioned in the cover letter, this change prepares the interface for a
follow-up series adding multi-map support, which we will be sending out
shortly and which extends these arguments. Keeping this in place avoids a
subsequent rework and keeps the overall transition incremental.


Thanks,
Vijay

>>
>> Suggested-by: Rob Herring (Arm) <robh@...nel.org>
>> Signed-off-by: Charan Teja Kalla <charan.kalla@....qualcomm.com>
>> Signed-off-by: Vijayanand Jitta <vijayanand.jitta@....qualcomm.com>
>> ---
>>  drivers/cdx/cdx_msi.c                 |  2 +-
>>  drivers/iommu/of_iommu.c              | 12 ++++++---
>>  drivers/of/base.c                     | 37 +++++++++++++--------------
>>  drivers/pci/controller/dwc/pci-imx6.c | 10 ++++++--
>>  drivers/pci/controller/pcie-apple.c   |  4 ++-
>>  drivers/xen/grant-dma-ops.c           | 20 +++++++++------
>>  include/linux/of.h                    | 32 ++++++++++++++++++-----
>>  7 files changed, 75 insertions(+), 42 deletions(-)
>>
> 
>