From: Rob Herring <robh@kernel.org>
To: Qiang Yu <qiang.yu@oss.qualcomm.com>
Cc: Bjorn Andersson <andersson@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
Brian Masney <bmasney@redhat.com>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Taniya Das <taniya.das@oss.qualcomm.com>,
Konrad Dybcio <konradybcio@kernel.org>,
linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/3] dt-bindings: clock: qcom: Move x1e80100 TCSR to own binding
Date: Tue, 11 Aug 2026 21:14:14 -0500 [thread overview]
Message-ID: <20260812021414.GA544668-robh@kernel.org> (raw)
In-Reply-To: <20260805-hamoa_tcsr_qref_0805-v2-1-4f1cfb1fcab2@oss.qualcomm.com>
On Wed, Aug 05, 2026 at 10:34:55PM -0700, Qiang Yu wrote:
> The QREF block supplies reference clocks to PCIe/USB/UFS PHYs and
> requires dedicated LDO supplies to operate. The digital control
> interface for QREF (clkref_en registers) resides in TCSR on x1e80100.
> Since QREF has no dedicated DT node of its own, these supply
> properties are placed in the TCSR node which acts as the control
> interface for QREF.
>
> These LDOs are required by QREF to provide a stable reference clock,
> without which the USB/PCIe/eDP PHYs cannot work properly, so they are
> marked required even though it breaks ABI.
>
> Add a dedicated binding file for qcom,x1e80100-tcsr and document the
> supply properties.
>
> Signed-off-by: Qiang Yu <qiang.yu@oss.qualcomm.com>
> ---
> .../bindings/clock/qcom,sm8550-tcsr.yaml | 1 -
> .../bindings/clock/qcom,x1e80100-tcsr.yaml | 118 +++++++++++++++++++++
> 2 files changed, 118 insertions(+), 1 deletion(-)
sashiko issue needs to be addressed.
next prev parent reply other threads:[~2026-08-12 2:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-06 5:34 [PATCH v2 0/3] clk: qcom: Migrate x1e80100 TCSR to clk_ref helper Qiang Yu
2026-08-06 5:34 ` [PATCH v2 1/3] dt-bindings: clock: qcom: Move x1e80100 TCSR to own binding Qiang Yu
2026-08-12 2:14 ` Rob Herring [this message]
2026-08-06 5:34 ` [PATCH v2 2/3] clk: qcom: tcsrcc-x1e80100: Migrate to clk_ref helper Qiang Yu
2026-08-06 5:34 ` [PATCH v2 3/3] arm64: dts: qcom: hamoa/purwa: Add QREF regulator supplies Qiang Yu
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