linux-kernel - Re: [PATCH v2 0/4] spi: stm32: stability & performance enhancements

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Message-ID: <f88530c5-9ec0-4f23-a8c5-4155983a4ff1@foss.st.com>
Date: Thu, 8 Jan 2026 17:57:04 +0100
From: Alexandre TORGUE <alexandre.torgue@...s.st.com>
To: Alain Volmat <alain.volmat@...s.st.com>, Mark Brown <broonie@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: <linux-spi@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, Deepak Kumar <deepak.kumar01@...com>
Subject: Re: [PATCH v2 0/4] spi: stm32: stability & performance enhancements

Hi

On 12/18/25 11:48, Alain Volmat wrote:
> The series fixes a stability issue when dealing with <8bpw
> transfers, as well as enforce an error if the DMA information
> provided within the DT are incorrect.
> 
> Performance enhancement is also provided by allowing a polling
> mode which is triggered when the transfer is so short that
> polling mode transfer would lead to faster transfer than
> if it was done in a interrupt driven manner.
> 
> Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
> ---
> Changes in v2:
> - reordered commits, putting fix commits first in the series.
> - no changes done in commits.
> - Link to v1: https://lore.kernel.org/r/20251217-stm32-spi-enhancements-v1-0-943348b8ff66@foss.st.com
> 
> ---
> Alain Volmat (3):
>        spi: stm32: properly fail on dma_request_chan error
>        spi: stm32: perform small transfer in polling mode
>        ARM: dts: stm32: add spi1 sleep state pinctrl on stm32mp157c-ev1
> 
> Deepak Kumar (1):
>        spi: stm32: fix Overrun issue at < 8bpw
> 
>   arch/arm/boot/dts/st/stm32mp157c-ev1.dts |   3 +-
>   drivers/spi/spi-stm32.c                  | 106 +++++++++++++++++++++++++++----
>   2 files changed, 96 insertions(+), 13 deletions(-)
> ---
> base-commit: 865a1f17d5e41c0b34929afcab0afa6bdb90d33e
> change-id: 20251213-stm32-spi-enhancements-29da9bc29133
> 
> Best regards,

DT patch applied on stm32-next.

Regards
Alex