[PATCH v4 1/2] dt-bindings: mmc: sdhci-pxa: add state_uhs pinctrl
From: Duje Mihanović <duje@dujemihanovic.xyz>
Date: 2025-08-21 11:20:49
Also in:
linux-mmc, lkml, phone-devel
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Ulf Hansson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
On the pxav3 controller, increasing the drive strength of the data pins might be required to maintain stability on fast bus clocks (above 100 MHz). Add a state_uhs pinctrl to allow this. Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Duje Mihanović <duje@dujemihanovic.xyz> --- Changes in v4: - Rebase on v6.17-rc2 (That version has essentially had a part of this patch merged, causing the potentially weird diff. The end result is the same as in the previous versions of the series though.) Changes in v2: - Newlines between properties in if: --- .../devicetree/bindings/mmc/sdhci-pxa.yaml | 29 +++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-pxa.yaml b/Documentation/devicetree/bindings/mmc/sdhci-pxa.yaml
index e7c06032048a3a73eb3eb67a887e75db273ffa92..fba1cc50fdf07cc25d42f45512c385a9b8207b9b 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-pxa.yaml
+++ b/Documentation/devicetree/bindings/mmc/sdhci-pxa.yaml@@ -44,12 +44,27 @@ allOf: items: - const: default - const: state_cmd_gpio - pinctrl-0: - description: - Should contain default pinctrl. + pinctrl-1: description: Should switch CMD pin to GPIO mode as a high output. + - if: + properties: + compatible: + contains: + const: mrvl,pxav3-mmc + then: + properties: + pinctrl-names: + description: + Optional for increasing stability of the controller at fast bus clocks. + items: + - const: default + - const: state_uhs + + pinctrl-1: + description: + Should switch the drive strength of the data pins to high. properties: compatible:
@@ -82,6 +97,14 @@ properties: - const: io - const: core + pinctrl-names: true + + pinctrl-0: + description: + Should contain default pinctrl. + + pinctrl-1: true + mrvl,clk-delay-cycles: description: Specify a number of cycles to delay for tuning. $ref: /schemas/types.yaml#/definitions/uint32
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2.50.1