[PATCH v3 0/1] riscv: dts: starfive: jh7110-milkv-mars: enable usb0 host function

[PATCH v3 0/1] riscv: dts: starfive: jh7110-milkv-mars: enable usb0 host function

[E Shattow]

Enable host mode JH7110 on-chip USB for Milk-V Mars by setting host mode
and connect vbus pinctrl.

This functionality depends on setting the USB over-current register to disable at bootloader phase, for example U-Boot:
https://patchwork.ozlabs.org/project/uboot/patch/20241012031328.4268-6-minda.chen@starfivetech.com/

If the over-current register is not prepared for us then the result is no
change in functional outcome with this patch applied; there is an error
visible to the user and this additional usb configuration fails (same as
it is now). The existing three VL805 connected USB ports via PCIe on
Milk-V Mars are not affected.

Changes since v2:
 - Rebase on 6.12

Changes since v1:
 - series name (was "[PATCH] riscv: dts: starfive: jh7110-milkv-mars: set host mode and vbus pin for on-chip USB 2.0")
 - adjust pin label to obey dtschema
 - use cover letter

E Shattow (1):
  riscv: dts: starfive: jh7110-milkv-mars: enable usb0 host function

 .../boot/dts/starfive/jh7110-milkv-mars.dts   | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

-- 
2.45.2

[PATCH 1/1] riscv: dts: starfive: jh7110-milkv-mars: enable usb0 host function

[E Shattow]

Milk-V Mars set host mode and vbus pin for JH7110 on-chip USB 2.0

Signed-off-by: E Shattow <e@freeshell.de>
---
 .../boot/dts/starfive/jh7110-milkv-mars.dts   | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/riscv/boot/dts/starfive/jh7110-milkv-mars.dts b/arch/riscv/boot/dts/starfive/jh7110-milkv-mars.dts
index 5cb9e99e1dac..45d4f7556521 100644
--- a/arch/riscv/boot/dts/starfive/jh7110-milkv-mars.dts
+++ b/arch/riscv/boot/dts/starfive/jh7110-milkv-mars.dts
@@ -35,3 +35,24 @@ &phy0 {
 	rx-internal-delay-ps = <1500>;
 	tx-internal-delay-ps = <1500>;
 };
+
+&sysgpio {
+        usb0_pins: usb0-0 {
+                vbus-pins {
+                        pinmux = <GPIOMUX(25, GPOUT_SYS_USB_DRIVE_VBUS,
+                                              GPOEN_ENABLE,
+                                              GPI_NONE)>;
+                        bias-disable;
+                        input-disable;
+                        input-schmitt-disable;
+                        slew-rate = <0>;
+                };
+        };
+};
+
+&usb0 {
+        dr_mode = "host";
+        pinctrl-names = "default";
+        pinctrl-0 = <&usb0_pins>;
+        status = "okay";
+};
-- 
2.45.2