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Tue, 07 Apr 2026 01:26:01 -0700 (PDT) From: Iker Pedrosa Date: Tue, 07 Apr 2026 10:25:21 +0200 Subject: [PATCH v6 1/9] dt-bindings: mmc: spacemit,sdhci: add pinctrl support for voltage switching Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260407-orangepi-sd-card-uhs-v6-1-b5b8a1b2bfc8@gmail.com> References: <20260407-orangepi-sd-card-uhs-v6-0-b5b8a1b2bfc8@gmail.com> In-Reply-To: <20260407-orangepi-sd-card-uhs-v6-0-b5b8a1b2bfc8@gmail.com> To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Adrian Hunter , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan , Yixun Lan Cc: Troy Mitchell , Michael Opdenacker , Javier Martinez Canillas , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org, Iker Pedrosa X-Mailer: b4 0.14.2 Document pinctrl properties to support voltage-dependent pin configuration switching for UHS-I SD card modes. Add optional pinctrl-names property with two states: - "default": For 3.3V operation with standard drive strength - "state_uhs": For 1.8V operation with optimized drive strength These pinctrl states allow the SDHCI driver to coordinate voltage switching with pin configuration changes, ensuring proper signal integrity during UHS-I mode transitions. Signed-off-by: Iker Pedrosa --- .../devicetree/bindings/mmc/spacemit,sdhci.yaml | 16 ++++++++++++= ++++ 1 file changed, 16 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml b/Do= cumentation/devicetree/bindings/mmc/spacemit,sdhci.yaml index 9a055d963a7f0cdba4741c1e3e7269688dcd5f45..932fccc609bf8dbaf3ecfe09d9e= 610852ac7afa0 100644 --- a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml +++ b/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml @@ -11,6 +11,7 @@ maintainers: =20 allOf: - $ref: mmc-controller.yaml# + - $ref: sdhci-common.yaml# =20 properties: compatible: @@ -44,6 +45,18 @@ properties: - const: axi - const: sdh =20 + pinctrl-names: + minItems: 1 + items: + - const: default + - const: uhs + + pinctrl-0: + description: Default pinctrl state for 3.3V operation + + pinctrl-1: + description: Optional pinctrl state for 1.8V UHS operation with "uhs" = name + required: - compatible - reg @@ -62,4 +75,7 @@ examples: interrupt-parent =3D <&plic>; clocks =3D <&clk_apmu 10>, <&clk_apmu 13>; clock-names =3D "core", "io"; + pinctrl-names =3D "default", "uhs"; + pinctrl-0 =3D <&sdhci_default_cfg>; + pinctrl-1 =3D <&sdhci_uhs_cfg>; }; --=20 2.53.0