linux-kernel - Re: [PATCH v3 1/7] spmi: Implement spmi_subdevice_alloc_and

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Message-ID: <20250731120522.00001005@huawei.com>
Date: Thu, 31 Jul 2025 12:05:22 +0100
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
CC: <sboyd@...nel.org>, <jic23@...nel.org>, <dlechner@...libre.com>,
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Subject: Re: [PATCH v3 1/7] spmi: Implement spmi_subdevice_alloc_and_add()
 and devm variant

On Wed, 30 Jul 2025 13:26:39 +0200
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com> wrote:

> Some devices connected over the SPMI bus may be big, in the sense
> that those may be a complex of devices managed by a single chip
> over the SPMI bus, reachable through a single SID.
> 
> Add new functions aimed at managing sub-devices of a SPMI device
> spmi_subdevice_alloc_and_add() and a spmi_subdevice_put_and_remove()
> for adding a new subdevice and removing it respectively, and also
> add their devm_* variants.
> 
> The need for such functions comes from the existance of	those
> complex Power Management ICs (PMICs), which feature one or many
> sub-devices, in some cases with these being even addressable on
> the chip in form of SPMI register ranges.
> 
> Examples of those devices can be found in both Qualcomm platforms
> with their PMICs having PON, RTC, SDAM, GPIO controller, and other
> sub-devices, and in newer MediaTek platforms showing similar HW
> features and a similar layout with those also having many subdevs.
> 
> Also, instead of generally exporting symbols, export them with a
> new "SPMI" namespace: all users will have to import this namespace
> to make use of the newly introduced exports.
> 
> Link: https://lore.kernel.org/r/20250722101317.76729-2-angelogioacchino.delregno@collabora.com
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
With the note that I know almost nothing about SPMI so am just
looking at what is here + replies in earlier threads.
Looks good to me.

Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>