riscv: dts: starfive: add Milk-V Mars CM Lite system-on-module

Milk-V Mars CM Lite is a System-on-Module based on the Milk-V Mars CM
without the onboard eMMC storage component populated and configured
instead for SD3.0 Card Slot on that interface via 100-pin connector.

Link to Milk-V Mars CM Lite schematics: https://github.com/milkv-mars/mars-files/tree/main/Mars-CM_Hardware_Schematices
Link to StarFive JH7110 Technical Reference Manual: https://doc-en.rvspace.org/JH7110/TRM/index.html
Link to Raspberry Pi CM4IO datasheet: https://datasheets.raspberrypi.com/cm4io/cm4io-datasheet.pdf

Add the devicetree file to make use of StarFive JH7110 common supported
features PMIC, EEPROM, UART, I2C, GPIO, PCIe, QSPI Flash, PWM, and
Ethernet. Also configure the eMMC interface mmc0 for SD Card use and
configure the common SD Card interface mmc1 for onboard SDIO BT+WiFi.

Signed-off-by: E Shattow <e@freeshell.de>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

diff --git a/arch/riscv/boot/dts/starfive/Makefile b/arch/riscv/boot/dts/starfive/Makefile
index 79742617ddab3d7df112f5097819d906de793009..62b659f89ba716e60ed0f9dcd670b24ba07814a5 100644 (file)
--- a/arch/riscv/boot/dts/starfive/Makefile
+++ b/arch/riscv/boot/dts/starfive/Makefile
@@ -11,6 +11,7 @@ dtb-$(CONFIG_ARCH_STARFIVE) += jh7100-starfive-visionfive-v1.dtb
 dtb-$(CONFIG_ARCH_STARFIVE) += jh7110-deepcomputing-fml13v01.dtb
 dtb-$(CONFIG_ARCH_STARFIVE) += jh7110-milkv-mars.dtb
 dtb-$(CONFIG_ARCH_STARFIVE) += jh7110-milkv-marscm-emmc.dtb
+dtb-$(CONFIG_ARCH_STARFIVE) += jh7110-milkv-marscm-lite.dtb
 dtb-$(CONFIG_ARCH_STARFIVE) += jh7110-pine64-star64.dtb
 dtb-$(CONFIG_ARCH_STARFIVE) += jh7110-starfive-visionfive-2-v1.2a.dtb
 dtb-$(CONFIG_ARCH_STARFIVE) += jh7110-starfive-visionfive-2-v1.3b.dtb

diff --git a/arch/riscv/boot/dts/starfive/jh7110-milkv-marscm-lite.dts b/arch/riscv/boot/dts/starfive/jh7110-milkv-marscm-lite.dts
new file mode 100644 (file)
index 0000000..6c40d0e
--- /dev/null
+++ b/arch/riscv/boot/dts/starfive/jh7110-milkv-marscm-lite.dts
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2025 E Shattow <e@freeshell.de>
+ */
+
+/dts-v1/;
+#include "jh7110-milkv-marscm.dtsi"
+
+/ {
+       model = "Milk-V Mars CM Lite";
+       compatible = "milkv,marscm-lite", "starfive,jh7110";
+};
+
+&mmc0 {
+       bus-width = <4>;
+       cd-gpios = <&sysgpio 41 GPIO_ACTIVE_LOW>;
+};
+
+&mmc0_pins {
+       pwren-pins {
+               pinmux = <GPIOMUX(22, GPOUT_HIGH,
+                                     GPOEN_ENABLE,
+                                     GPI_NONE)>;
+       };
+};