linux-kernel - Re: [PATCH v8 04/10] spmi: Implement spmi_subdevice_alloc_and

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Message-ID: <176852933471.16445.12620793496789127631@lazor>
Date: Thu, 15 Jan 2026 20:08:54 -0600
From: Stephen Boyd <sboyd@...nel.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, jic23@...nel.org
Cc: dlechner@...libre.com, nuno.sa@...log.com, andy@...nel.org, arnd@...db.de, gregkh@...uxfoundation.org, srini@...nel.org, vkoul@...nel.org, neil.armstrong@...aro.org, sre@...nel.org, angelogioacchino.delregno@...labora.com, krzk@...nel.org, dmitry.baryshkov@....qualcomm.com, quic_wcheng@...cinc.com, melody.olvera@....qualcomm.com, quic_nsekar@...cinc.com, ivo.ivanov.ivanov1@...il.com, abelvesa@...nel.org, luca.weiss@...rphone.com, konrad.dybcio@....qualcomm.com, mitltlatltl@...il.com, krishna.kurapati@....qualcomm.com, linux-arm-msm@...r.kernel.org, linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org, linux-pm@...r.kernel.org, kernel@...labora.com, Jonathan Cameron <jonathan.cameron@...wei.com>
Subject: Re: [PATCH v8 04/10] spmi: Implement spmi_subdevice_alloc_and_add() and devm variant

Quoting AngeloGioacchino Del Regno (2026-01-14 03:27:36)
> 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 existence 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.
> 
> Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>
> Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on SM8650-QRD
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---

Acked-by: Stephen Boyd <sboyd@...nel.org>