[PATCH v4 1/3] dt-bindings: net: nfc: add st,st21nfcd
flat view
COLD33d
SUPERSEDED
From: Kristian Brox <hidden>
Date: 2026-09-02 21:22:32
Also in:
linux-arm-msm, linux-devicetree, lkml, oe-linux-nfc
Subsystem:
networking drivers, nfc subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Heidelberg, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Status: Superseded by v5 (posted 2026-10-05). [go to v5]
Revision v4 (5 revisions archived).
Revisions (5)
- v1
- v2 [diff against previous]
- v3 [diff against previous]
- v4 current [diff against previous] re-posted go to this post
- v5 [diff against previous]
Add a compatible for the ST ST21NFCD NFC controller. Document optional SYS_CLK (clocks) and VPS_IO (vdd-io-supply). ST21NFCD is not I2C-only; the ST data brief lists I2C and SPI. Split the spi-max-frequency if/else: forbid it for st,st21nfcb-i2c and st,st21nfcc-i2c, require it for st,st21nfcb-spi, and leave it optional for st,st21nfcd. Add clocks and vdd-io-supply to the existing st,st21nfcb-i2c example instead of a second I2C example. Signed-off-by: Kristian Brox <redacted> --- .../devicetree/bindings/net/nfc/st,st-nci.yaml | 49 +++++++++++++++------- 1 file changed, 35 insertions(+), 14 deletions(-)
diff --git a/Documentation/devicetree/bindings/net/nfc/st,st-nci.yaml b/Documentation/devicetree/bindings/net/nfc/st,st-nci.yaml
index 1dcbddbc5a74..8abafb3d8994 100644
--- a/Documentation/devicetree/bindings/net/nfc/st,st-nci.yaml
+++ b/Documentation/devicetree/bindings/net/nfc/st,st-nci.yaml@@ -15,6 +15,7 @@ properties: - st,st21nfcb-i2c - st,st21nfcb-spi - st,st21nfcc-i2c + - st,st21nfcd reset-gpios: description: Output GPIO pin used for resetting the controller
@@ -36,26 +37,43 @@ properties: Specifies that the uicc swp signal can be physically connected to the controller + clocks: + maxItems: 1 + description: + External reference clock connected to SYS_CLK. + + vdd-io-supply: + description: + Digital I/O supply (VPS_IO). + required: - compatible - interrupts - reg - reset-gpios -if: - properties: - compatible: - contains: - enum: - - st,st21nfcb-i2c - - st,st21nfcc-i2c -then: - properties: - spi-max-frequency: false -else: - $ref: /schemas/spi/spi-peripheral-props.yaml# - required: - - spi-max-frequency +allOf: + - if: + properties: + compatible: + contains: + enum: + - st,st21nfcb-i2c + - st,st21nfcc-i2c + then: + properties: + spi-max-frequency: false + else: + $ref: /schemas/spi/spi-peripheral-props.yaml# + + - if: + properties: + compatible: + contains: + const: st,st21nfcb-spi + then: + required: + - spi-max-frequency unevaluatedProperties: false
@@ -76,6 +94,9 @@ examples: interrupts = <2 IRQ_TYPE_LEVEL_HIGH>; reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>; + clocks = <&clk>; + vdd-io-supply = <&vdd_io>; + ese-present; uicc-present; };
--
2.55.0