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[75.72.117.212]) by smtp.gmail.com with ESMTPSA id e9e14a558f8ab-4244afa9f6fsm2346335ab.22.2025.09.17.15.07.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Sep 2025 15:07:32 -0700 (PDT) From: Alex Elder To: broonie@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: linux-spi@vger.kernel.org, devicetree@vger.kernel.org, dlan@gentoo.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, p.zabel@pengutronix.de, spacemit@lists.linux.dev, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] riscv: dts: spacemit: define a SPI controller node Date: Wed, 17 Sep 2025 17:07:23 -0500 Message-ID: <20250917220724.288127-4-elder@riscstar.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250917220724.288127-1-elder@riscstar.com> References: <20250917220724.288127-1-elder@riscstar.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Define a node for the fourth SoC SPI controller (number 3) on the SpacemiT K1 SoC. Enable it on the Banana Pi BPI-F3 board, which exposes this feature via its GPIO block: GPIO PIN 19: MOSI GPIO PIN 21: MISO GPIO PIN 23: SCLK GPIO PIN 24: SS (inverted) Define pincontrol configurations for the pins as used on that board. (This was tested using a GigaDevice GD25Q64E SPI NOR chip.) Signed-off-by: Alex Elder --- .../boot/dts/spacemit/k1-bananapi-f3.dts | 6 ++++++ arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi | 20 +++++++++++++++++++ arch/riscv/boot/dts/spacemit/k1.dtsi | 19 ++++++++++++++++++ 3 files changed, 45 insertions(+) diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/b= oot/dts/spacemit/k1-bananapi-f3.dts index 6013be2585428..380d475d2f3f3 100644 --- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts +++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts @@ -44,6 +44,12 @@ &pdma { status =3D "okay"; }; =20 +&spi3 { + pinctrl-names =3D "default"; + pinctrl-0 =3D <&ssp3_0_cfg>; + status =3D "okay"; +}; + &uart0 { pinctrl-names =3D "default"; pinctrl-0 =3D <&uart0_2_cfg>; diff --git a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi b/arch/riscv/boot= /dts/spacemit/k1-pinctrl.dtsi index 3810557374228..16c953eca2aaa 100644 --- a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi +++ b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi @@ -28,4 +28,24 @@ pwm14-1-pins { drive-strength =3D <32>; }; }; + + ssp3_0_cfg: ssp3-0-cfg { + ssp3-0-no-pull-pins { + pinmux =3D , /* SCLK */ + , /* MOSI */ + ; /* MISO */ + + bias-disable; + drive-strength =3D <19>; + power-source =3D <3300>; + }; + + ssp3-0-frm-pins { + pinmux =3D ; /* FRM (frame) */ + + bias-pull-up =3D <0>; + drive-strength =3D <19>; + power-source =3D <3300>; + }; + }; }; diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spa= cemit/k1.dtsi index 66b33a9110ccd..a826cc1ac83d5 100644 --- a/arch/riscv/boot/dts/spacemit/k1.dtsi +++ b/arch/riscv/boot/dts/spacemit/k1.dtsi @@ -834,6 +834,25 @@ storage-bus { #size-cells =3D <2>; dma-ranges =3D <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>; =20 + spi3: spi@d401c000 { + compatible =3D "spacemit,k1-spi"; + reg =3D <0x0 0xd401c000 0x0 0x30>; + #address-cells =3D <1>; + #size-cells =3D <0>; + clocks =3D <&syscon_apbc CLK_SSP3>, + <&syscon_apbc CLK_SSP3_BUS>; + clock-names =3D "core", + "bus"; + resets =3D <&syscon_apbc RESET_SSP3>; + interrupts-extended =3D <&plic 55>; + spacemit,k1-ssp-id =3D <3>; + dmas =3D <&pdma 20>, + <&pdma 19>; + dma-names =3D "rx", + "tx"; + status =3D "disabled"; + }; + emmc: mmc@d4281000 { compatible =3D "spacemit,k1-sdhci"; reg =3D <0x0 0xd4281000 0x0 0x200>; --=20 2.48.1