linux-kernel - Re: [PATCH v3 0/5] riscv: dts: starfive: Add Milk-V Mars CM (Lite) SoM

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Message-ID: <20250911-smoked-aviation-b514261e547e@spud>
Date: Thu, 11 Sep 2025 19:07:10 +0100
From: Conor Dooley <conor@...nel.org>
To: E Shattow <e@...eshell.de>
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
	devicetree@...r.kernel.org,
	Heinrich Schuchardt <heinrich.schuchardt@...onical.com>,
	Emil Renner Berthing <emil.renner.berthing@...onical.com>
Subject: Re: [PATCH v3 0/5] riscv: dts: starfive: Add Milk-V Mars CM (Lite)
 SoM

Emil, This look okay to take?

On Fri, Sep 05, 2025 at 07:39:38AM -0700, E Shattow wrote:
> Milk-V Mars CM and Mars CM Lite System-on-Module both are based on the
> StarFive JH7110 SoC and compatible with the Raspberry Pi CM4IO Classic IO
> Board carrier. Mars CM Lite is Mars CM without the eMMC storage component
> on mmc0 and the mmc0 interface configured instead for SD Card use. The
> optional WiFi+BT chipset is connected via SDIO on the mmc1 interface that
> would otherwise be connected to an SD Card slot on the StarFive
> VisionFive2 reference design.
> 
> Add the related devicetree files for both Milk-V Mars CM and Milk-V Mars
> CM Lite describing the currently supported features, namely PMIC, UART,
> I2C, GPIO, eMMC or SD Card, WiFi+BT, QSPI Flash, and Ethernet.
> 
> Caveat with vendor AP6256 firmware files present the firmware loading is
> successful but subsequently fails IRQ wake initialization. Common GPIO
> conflicts for "WiFi" optioned boards having this module:
> 
> pwmdac_pins:
>  - AP6256: WL_REG_ON>>WIFI_REG_ON_H_GPIO33
>  - AP6256: WL_HOST_WAKE>>WIFI_WAKE_HOST_H_GPIO34
> 
> i2c2_pins:
>  - AP6256: UART_CTS_N<<UART1_RTSn_GPIO2
>  - AP6256: UART_RTS_N>>UART1_CTSn_GPIO3
> 
> i2c6_pins:
>  - AP6256: UART_RXD<<UART_TX_GPIO16
>  - AP6256: UART_TXD>>UART_RX_GPIO17
> 
> Tested successfully for basic mmc0 storage, USB, and network functionality on:
> - Milk-V Mars CM 8GB
> - Milk-V Mars CM Lite 4GB
> - Milk-V Mars CM Lite WiFi 8GB
> 
> Changes since v2:
> - PATCH 3/5 delete newline at end of file
> - PATCH 5/5 delete newline at end of file
> 
> Link to v2:
> https://lore.kernel.org/lkml/20250831225959.531393-1-e@freeshell.de/
> 
> E Shattow (5):
>   riscv: dts: starfive: add common board dtsi for Milk-V Mars CM
>     variants
>   dt-bindings: riscv: starfive: add milkv,marscm-emmc
>   riscv: dts: starfive: add Milk-V Mars CM system-on-module
>   dt-bindings: riscv: starfive: add milkv,marscm-lite
>   riscv: dts: starfive: add Milk-V Mars CM Lite system-on-module
> 
>  .../devicetree/bindings/riscv/starfive.yaml   |   2 +
>  arch/riscv/boot/dts/starfive/Makefile         |   2 +
>  .../dts/starfive/jh7110-milkv-marscm-emmc.dts |  12 ++
>  .../dts/starfive/jh7110-milkv-marscm-lite.dts |  25 +++
>  .../dts/starfive/jh7110-milkv-marscm.dtsi     | 159 ++++++++++++++++++
>  5 files changed, 200 insertions(+)
>  create mode 100644 arch/riscv/boot/dts/starfive/jh7110-milkv-marscm-emmc.dts
>  create mode 100644 arch/riscv/boot/dts/starfive/jh7110-milkv-marscm-lite.dts
>  create mode 100644 arch/riscv/boot/dts/starfive/jh7110-milkv-marscm.dtsi
> 
> 
> base-commit: 8181cc2f3f21657392da912eb20ee17514c87828
> -- 
> 2.50.0
> 

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