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

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Message-ID: <20251217-stm32-spi-enhancements-v1-0-943348b8ff66@foss.st.com>
Date: Wed, 17 Dec 2025 22:51:30 +0100
From: Alain Volmat <alain.volmat@...s.st.com>
To: Mark Brown <broonie@...nel.org>,
        Maxime Coquelin
	<mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.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>, Alain Volmat <alain.volmat@...s.st.com>,
        Deepak
 Kumar <deepak.kumar01@...com>
Subject: [PATCH 0/4] spi: stm32: stability & performance enhancements

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>
---
Alain Volmat (3):
      spi: stm32: perform small transfer in polling mode
      spi: stm32: properly fail on dma_request_chan error
      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,
-- 
Alain Volmat <alain.volmat@...s.st.com>