linux-kernel - [PATCH v4 0/4] Add Aspeed AST2700 uhci support

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Message-ID: <20250922052045.2421480-1-ryan_chen@aspeedtech.com>
Date: Mon, 22 Sep 2025 13:20:41 +0800
From: Ryan Chen <ryan_chen@...eedtech.com>
To: ryan_chen <ryan_chen@...eedtech.com>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Rob Herring <robh@...nel.org>, "Krzysztof
 Kozlowski" <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, "Alan
 Stern" <stern@...land.harvard.edu>, Philipp Zabel <p.zabel@...gutronix.de>,
	<linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH v4 0/4] Add Aspeed AST2700 uhci support

This patch series adds support for the UHCI controller found on the
Aspeed AST2700 SoC.

Compared to earlier SoCs (AST2400/2500/2600), AST2700 UHCI:
 - requires a reset line to be deasserted before use
 - supports 64-bit DMA addressing

This series updates the bindings and platform driver accordingly.

v4:
- usb-uhci.yaml
 - fix errors 'make dt_binding_check'
- uhci-platform.c
 - remove IS_ERR_OR_NULL(uhci->rsts) check, due to reset_control_assert
   will return 0, when uhci->rsts is null.
 - use dma_mask_32 as default, and just add aspeed,ast2700-uhci for dma_64.

v3:
- uhci-platform.c
 - add reset_control_assert in uhci_hcd_platform_remove.

v2:
- usb-uhci.yaml
 - add required resets for aspeed,ast2700-uhci
- uhci-platform.c
 - change the err_clk before err_reset.

Ryan Chen (4):
  dt-bindings: usb: uhci: Add reset property
  usb: uhci: Add reset control support
  dt-bindings: usb: uhci: Add Aspeed AST2700 compatible
  usb: uhci: Add Aspeed AST2700 support

 .../devicetree/bindings/usb/usb-uhci.yaml     | 13 ++++++++
 drivers/usb/host/uhci-hcd.h                   |  1 +
 drivers/usb/host/uhci-platform.c              | 31 ++++++++++++++++---
 3 files changed, 41 insertions(+), 4 deletions(-)

-- 
2.34.1