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From: Otavio Salvador <otavio@ossystems.com.br>
To: Chen-Yu Tsai <wens@kernel.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Samuel Holland <samuel@sholland.org>,
	Srinivas Kandagatla <srini@kernel.org>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>
Cc: Maxime Ripard <mripard@kernel.org>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
	Otavio Salvador <otavio@ossystems.com.br>
Subject: [PATCH 0/2] Add SID and THS calibration for Allwinner R40
Date: Fri,  2 Oct 2026 22:25:34 -0300	[thread overview]
Message-ID: <20261003012534.418820-3-otavio@ossystems.com.br> (raw)

The R40 thermal sensor node has no calibration data. The THS driver
then keeps the calibration registers at their reset value (0x800), and
the reported temperatures have a chip-dependent offset.

This series adds the R40 SID (eFuse) controller and connects the THS
node to its factory calibration at eFuse offset 0x40.

Patch 1 adds the R40 compatible to the SID binding, with the A64
compatible as fallback. The SID driver needs no change.

Patch 2 adds the SID node to sun8i-r40.dtsi and the nvmem cell for the
THS calibration.

Checked with dt_binding_check, and with dtbs_check on all R40, V40 and
T3 board DTBs. No warnings. Tested on two Boardcon EMA40i (A40i) boards.

Otavio Salvador (2):
  dt-bindings: nvmem: SID: Add binding for R40 SID controller
  ARM: dts: sun8i-r40: Add SID node and THS calibration

 .../bindings/nvmem/allwinner,sun4i-a10-sid.yaml   |  1 +
 arch/arm/boot/dts/allwinner/sun8i-r40.dtsi        | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)


base-commit: ff47652a4b66c067c765a7ad464d930b5a9367cc
-- 
2.55.0



             reply	other threads:[~2026-10-03  1:27 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-03  1:25 Otavio Salvador [this message]
2026-10-03  1:25 ` [PATCH 1/2] dt-bindings: nvmem: SID: Add binding for R40 SID controller Otavio Salvador
2026-10-03  1:25 ` [PATCH 2/2] ARM: dts: sun8i-r40: Add SID node and THS calibration Otavio Salvador
2026-10-05  9:02   ` Andre Przywara
2026-10-05 15:49     ` Otavio Salvador
2026-10-05 17:54       ` Andre Przywara

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