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riscv: dts: spacemit: define a SPI controller node

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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.)

Reviewed-by: Yixun Lan <dlan@gentoo.org>
Signed-off-by: Alex Elder <elder@riscstar.com>
Signed-off-by: Guodong Xu <guodong@riscstar.com>
Link: https://lore.kernel.org/r/20260502-spi-spacemit-k1-v10-3-f412e1ae8a34@riscstar.com
Signed-off-by: Yixun Lan <dlan@kernel.org>
This commit is contained in:
Alex Elder 2026-05-02 21:30:53 -04:00 committed by Yixun Lan
parent 24c12ca43b
commit c580774185
3 changed files with 42 additions and 0 deletions
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7
arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
View File

@ -14,6 +14,7 @@ aliases {
ethernet0 = &eth0;
ethernet1 = &eth1;
serial0 = &uart0;
spi3 = &spi3;
i2c2 = &i2c2;
i2c8 = &i2c8;
};
@ -335,6 +336,12 @@ &pcie2 {
status = "okay";
};
&spi3 {
pinctrl-0 = <&ssp3_0_cfg>;
pinctrl-names = "default";
status = "okay";
};
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_2_cfg>;

20
arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
View File

@ -570,4 +570,24 @@ pwm14-1-pins {
drive-strength = <32>;
};
};
ssp3_0_cfg: ssp3-0-cfg {
ssp3-0-pins {
pinmux = <K1_PADCONF(75, 2)>, /* SCLK */
<K1_PADCONF(77, 2)>, /* MOSI */
<K1_PADCONF(78, 2)>; /* MISO */
bias-disable;
drive-strength = <19>;
power-source = <3300>;
};
ssp3-0-frm-pins {
pinmux = <K1_PADCONF(76, 2)>; /* FRM (frame) */
bias-pull-up = <0>;
drive-strength = <19>;
power-source = <3300>;
};
};
};

15
arch/riscv/boot/dts/spacemit/k1.dtsi
View File

@ -983,6 +983,21 @@ qspi: spi@d420c000 {
status = "disabled";
};
spi3: spi@d401c000 {
compatible = "spacemit,k1-spi";
reg = <0x0 0xd401c000 0x0 0x30>;
#address-cells = <1>;
#size-cells = <0>;
clocks = <&syscon_apbc CLK_SSP3>,
<&syscon_apbc CLK_SSP3_BUS>;
clock-names = "core", "bus";
resets = <&syscon_apbc RESET_SSP3>;
interrupts = <55>;
dmas = <&pdma 20>, <&pdma 19>;
dma-names = "rx", "tx";
status = "disabled";
};
/* sec_uart1: 0xf0612000, not available from Linux */
};