linux-kernel - [PATCH v2 0/1] riscv: dts: starfive: jh7110-milkv-mars: enable usb0 host function

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Message-ID: <20241116061719.36409-2-e@freeshell.de>
Date: Fri, 15 Nov 2024 22:17:07 -0800
From: E Shattow <e@...eshell.de>
To: Jisheng Zhang <jszhang@...nel.org>
Cc: E Shattow <e@...eshell.de>,
	Conor Dooley <conor@...nel.org>,
	Emil Renner Berthing <kernel@...il.dk>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	linux-riscv@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/1] riscv: dts: starfive: jh7110-milkv-mars: enable usb0 host function

Enable host mode JH7110 on-chip USB for Milk-V Mars by setting host mode
and connect vbus pinctrl.

This functionality depends on:

1. commit e10c52e7e064038d9bd67b20bf4ce92077d7d84e
"phy: starfive: jh7110-usb: Fix link configuration to controller"

2. Setting the USB over-current register to disable. This is done at
bootloader phase, for example U-Boot:
https://patchwork.ozlabs.org/project/uboot/patch/20241012031328.4268-6-minda.chen@starfivetech.com/

If the over-current register is not prepared for us then the result is no
change in functional outcome with this patch applied; there is an error
visible to the user and this additional usb configuration fails (same as
it is now). The existing three VL805 connected USB ports via PCIe on 
Milk-V Mars are not affected.

Changes since v1:
 - series name (was "[PATCH] riscv: dts: starfive: jh7110-milkv-mars: set host mode and vbus pin for on-chip USB 2.0")
 - adjust pin label to obey dtschema
 - use cover letter

E Shattow (1):
  riscv: dts: starfive: jh7110-milkv-mars: enable usb0 host function

 .../boot/dts/starfive/jh7110-milkv-mars.dts    | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

-- 
2.45.2