linux-kernel - [PATCH 00/16] STM32 configure UART nodes for DMA

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Message-ID: <20220203171114.10888-1-erwan.leray@foss.st.com>
Date:   Thu, 3 Feb 2022 18:10:58 +0100
From:   Erwan Le Ray <erwan.leray@...s.st.com>
To:     Alexandre Torgue <alexandre.torgue@...s.st.com>
CC:     Rob Herring <robh+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Erwan Le Ray <erwan.leray@...s.st.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Marek Vasut <marex@...x.de>,
        Marcin Sloniewski <marcin.sloniewski@...il.com>,
        Ahmad Fatoum <a.fatoum@...gutronix.de>,
        Jagan Teki <jagan@...rulasolutions.com>,
        <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 00/16] STM32 configure UART nodes for DMA

Add DMA configuration to UART nodes in stm32mp15x (SOC level) and
remove it at board level to keep current PIO behavior when needed.
For stm32-ed1 and stm32-dkx boards, UART4 (console) and UART7
(no HW flow control pin available) are kept in PIO mode, while USART3
is now configured in DMA mode.
UART4 (console UART) has to be kept in irq mode, as DMA support for
console has been removed from the driver by commit e359b4411c28 
("serial: stm32: fix threaded interrupt handling"). 

For other stm32mp15x-based boards, current configuration is kept for
all UART instances.

Erwan Le Ray (16):
  ARM: dts: stm32: add DMA configuration to UART nodes on stm32mp151
  ARM: dts: stm32: keep uart4 behavior on stm32mp157c-ed1
  ARM: dts: stm32: keep uart4 and uart7 behavior on stm32mp15xx-dkx
  ARM: dts: stm32: keep uart4 behavior on icore-stm32mp1-ctouch2
  ARM: dts: stm32: keep uart4 behavior on icore-stm32mp1-edimm2.2
  ARM: dts: stm32: keep uart4 behavior on stm32mp157a-iot-box
  ARM: dts: stm32: keep uart nodes behavior on stm32mp1-microdev2.0-of7
  ARM: dts: stm32: keep uart nodes behavior on stm32mp1-microdev2.0
  ARM: dts: stm32: keep uart nodes behavior on stm32mp157a-stinger96
  ARM: dts: stm32: keep uart4 behavior on stm32mp157c-lxa-mc1
  ARM: dts: stm32: keep uart4 behavior on stm32mp157c-odyssey
  ARM: dts: stm32: keep uart nodes behavior on stm32mp15xx-dhcom-drc02
  ARM: dts: stm32: keep uart nodes behavior on stm32mp15xx-dhcom-pdk2
  ARM: dts: stm32: keep uart nodes behavior on stm32mp15xx-dhcom-picoitx
  ARM: dts: stm32: keep uart4 behavior on stm32mp15xx-dhcom-som
  ARM: dts: stm32: keep uart nodes behavior on
    stm32mp15xx-dhcor-avenger96

 arch/arm/boot/dts/stm32mp151.dtsi             | 21 +++++++++++++++++++
 .../stm32mp157a-icore-stm32mp1-ctouch2.dts    |  2 ++
 .../stm32mp157a-icore-stm32mp1-edimm2.2.dts   |  2 ++
 arch/arm/boot/dts/stm32mp157a-iot-box.dts     |  2 ++
 ...157a-microgea-stm32mp1-microdev2.0-of7.dts |  4 ++++
 ...32mp157a-microgea-stm32mp1-microdev2.0.dts |  4 ++++
 arch/arm/boot/dts/stm32mp157a-stinger96.dtsi  |  6 ++++++
 arch/arm/boot/dts/stm32mp157c-ed1.dts         |  2 ++
 arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts     |  2 ++
 arch/arm/boot/dts/stm32mp157c-odyssey.dts     |  2 ++
 .../arm/boot/dts/stm32mp15xx-dhcom-drc02.dtsi |  4 ++++
 arch/arm/boot/dts/stm32mp15xx-dhcom-pdk2.dtsi |  4 ++++
 .../boot/dts/stm32mp15xx-dhcom-picoitx.dtsi   |  4 ++++
 arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi  |  2 ++
 .../boot/dts/stm32mp15xx-dhcor-avenger96.dtsi |  6 ++++++
 arch/arm/boot/dts/stm32mp15xx-dkx.dtsi        |  4 ++++
 16 files changed, 71 insertions(+)

-- 
2.17.1