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Mon, 23 Mar 2026 03:19:35 -0700 (PDT) From: Iker Pedrosa Date: Mon, 23 Mar 2026 11:19:07 +0100 Subject: [PATCH v4 4/8] riscv: dts: spacemit: k1: add SD card controller and pinctrl support 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: <20260323-orangepi-sd-card-uhs-v4-4-567c9775fd0e@gmail.com> References: <20260323-orangepi-sd-card-uhs-v4-0-567c9775fd0e@gmail.com> In-Reply-To: <20260323-orangepi-sd-card-uhs-v4-0-567c9775fd0e@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: 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 , Anand Moon , Trevor Gamblin X-Mailer: b4 0.14.2 Add SD card controller infrastructure for SpacemiT K1 SoC with complete pinctrl support for both standard and UHS modes. - Add sdhci0 controller definition with clocks, resets and interrupts - Add mmc1_cfg pinctrl for 3.3V standard SD operation - Add mmc1_uhs_cfg pinctrl for 1.8V UHS high-speed operation - Configure appropriate drive strength and power-source properties This provides complete SD card infrastructure that K1-based boards can enable. Tested-by: Anand Moon Tested-by: Trevor Gamblin Signed-off-by: Iker Pedrosa --- arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi | 40 ++++++++++++++++++++++++= ++++ arch/riscv/boot/dts/spacemit/k1.dtsi | 13 +++++++++ 2 files changed, 53 insertions(+) diff --git a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi b/arch/riscv/boot= /dts/spacemit/k1-pinctrl.dtsi index b13dcb10f4d66022d27307de73a6ea3287e97441..8d82011f1af666fb78c282a2abc= c0cb88f962053 100644 --- a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi +++ b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi @@ -570,4 +570,44 @@ pwm14-1-pins { drive-strength =3D <32>; }; }; + + mmc1_cfg: mmc1-cfg { + mmc1-data-cmd-pins { + pinmux =3D , /* mmc1_d3 */ + , /* mmc1_d2 */ + , /* mmc1_d1 */ + , /* mmc1_d0 */ + ; /* mmc1_cmd */ + bias-pull-up =3D <1>; + drive-strength =3D <7>; + power-source =3D <3300>; + }; + + mmc1-clk-pins { + pinmux =3D ; /* mmc1_clk */ + bias-pull-down =3D <1>; + drive-strength =3D <7>; + power-source =3D <3300>; + }; + }; + + mmc1_uhs_cfg: mmc1-uhs-cfg { + mmc1-data-cmd-pins { + pinmux =3D , /* mmc1_d3 */ + , /* mmc1_d2 */ + , /* mmc1_d1 */ + , /* mmc1_d0 */ + ; /* mmc1_cmd */ + bias-pull-up =3D <1>; + drive-strength =3D <13>; + power-source =3D <1800>; + }; + + mmc1-clk-pins { + pinmux =3D ; /* mmc1_clk */ + bias-pull-down =3D <1>; + drive-strength =3D <13>; + power-source =3D <1800>; + }; + }; }; diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spa= cemit/k1.dtsi index d2015201f8e5adff8bda75712036b8dc2b79bcb5..3952c4d0ecfb26e9d215955ca87= 91243bbd1dab7 100644 --- a/arch/riscv/boot/dts/spacemit/k1.dtsi +++ b/arch/riscv/boot/dts/spacemit/k1.dtsi @@ -1211,6 +1211,19 @@ emmc: mmc@d4281000 { interrupts =3D <101>; status =3D "disabled"; }; + + sdhci0: mmc@d4280000 { + compatible =3D "spacemit,k1-sdhci"; + reg =3D <0x0 0xd4280000 0x0 0x200>; + clocks =3D <&syscon_apmu CLK_SDH_AXI>, + <&syscon_apmu CLK_SDH0>; + clock-names =3D "core", "io"; + resets =3D <&syscon_apmu RESET_SDH_AXI>, + <&syscon_apmu RESET_SDH0>; + reset-names =3D "axi", "sdh"; + interrupts =3D <99>; + status =3D "disabled"; + }; }; }; }; --=20 2.53.0