[PATCH 0/2] phy: qcom: usb-hs: add qcom,vendor-init-seq for raw ULPI writes

From: Herman van Hazendonk <github.com@herrie.org>
To: linux-phy@lists.infradead.org
Cc: devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	Vinod Koul <vkoul@kernel.org>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Bjorn Andersson <andersson@kernel.org>,
	Herman van Hazendonk <github.com@herrie.org>
Subject: [PATCH 0/2] phy: qcom: usb-hs: add qcom,vendor-init-seq for raw ULPI writes
Date: Wed,  3 Jun 2026 07:48:07 +0200	[thread overview]
Message-ID: <20260603054809.565723-1-github.com@herrie.org> (raw)

The qcom,usb-hs-phy driver already supports qcom,init-seq for
board-specific ULPI initialisation, but the address field in that
property is always offset by ULPI_EXT_VENDOR_SPECIFIC.  That makes
it impossible to reach the standard ULPI vendor register range
(0x30-0x3f) where MSM8x60-class hardware keeps pre-emphasis, HS
driver slope, and CDR auto-reset bits.

PATCH 1/2 adds the DT binding: an optional "qcom,vendor-init-seq"
property carrying raw (addr, val) u8 pairs with no implicit offset.

PATCH 2/2 adds the driver support.  The new sequence is applied AFTER
reset_control_reset() so the values survive the register restore the
reset performs.  While refactoring the shared parse logic into a
single helper, two pre-existing bugs in the qcom,init-seq path are
also fixed: an odd byte count would previously silently drop the
trailing half-pair, and there was no upper bound on the
devm_kmalloc_array() allocation driven by the DT value.

Herman van Hazendonk (2):
  dt-bindings: phy: qcom,usb-hs-phy: add qcom,vendor-init-seq
  phy: qcom: usb-hs: honour qcom,vendor-init-seq raw ULPI writes

 .../bindings/phy/qcom,usb-hs-phy.yaml         |  14 +++
 drivers/phy/qualcomm/phy-qcom-usb-hs.c        | 109 +++++++++++++++---
 2 files changed, 104 insertions(+), 19 deletions(-)

base-commit: 944125b4c454b58d2fe6e35f1087a932b2050dff
-- 
2.43.0

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