The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x d7cc532df95f7f159e40595440e4e4b99481457b # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025060233-umpire-askew-5f0b@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From d7cc532df95f7f159e40595440e4e4b99481457b Mon Sep 17 00:00:00 2001 From: Lukasz Czechowski lukasz.czechowski@thaumatec.com Date: Fri, 25 Apr 2025 17:18:08 +0200 Subject: [PATCH] arm64: dts: rockchip: fix internal USB hub instability on RK3399 Puma MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
Currently, the onboard Cypress CYUSB3304 USB hub is not defined in the device tree, and hub reset pin is provided as vcc5v0_host regulator to usb phy. This causes instability issues, as a result of improper reset duration.
The fixed regulator device requests the GPIO during probe in its inactive state (except if regulator-boot-on property is set, in which case it is requested in the active state). Considering gpio is GPIO_ACTIVE_LOW for Puma, it means it’s driving it high. Then the regulator gets enabled (because regulator-always-on property), which drives it to its active state, meaning driving it low.
The Cypress CYUSB3304 USB hub actually requires the reset to be asserted for at least 5 ms, which we cannot guarantee right now since there's no delay in the current config, meaning the hub may sometimes work or not. We could add delay as offered by fixed-regulator but let's rather fix this by using the proper way to model onboard USB hubs.
Define hub_2_0 and hub_3_0 nodes, as the onboard Cypress hub consist of two 'logical' hubs, for USB2.0 and USB3.0. Use the 'reset-gpios' property of hub to assign reset pin instead of using regulator. Rename the vcc5v0_host regulator to cy3304_reset to be more meaningful. Pin is configured to output-high by default, which sets the hub in reset state during pin controller initialization. This allows to avoid double enumeration of devices in case the bootloader has setup the USB hub before the kernel. The vdd-supply and vdd2-supply properties in hub nodes are added to provide correct dt-bindings, although power supplies are always enabled based on HW design.
Fixes: 2c66fc34e945 ("arm64: dts: rockchip: add RK3399-Q7 (Puma) SoM") Cc: stable@vger.kernel.org # 6.6 Cc: stable@vger.kernel.org # Backport of the patch in this series fixing product ID in onboard_dev_id_table in drivers/usb/misc/onboard_usb_dev.c driver Signed-off-by: Lukasz Czechowski lukasz.czechowski@thaumatec.com Link: https://lore.kernel.org/r/20250425-onboard_usb_dev-v2-3-4a76a474a010@thaumat... Signed-off-by: Heiko Stuebner heiko@sntech.de
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi index e00fbaa8acc1..314d9dfdba57 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi @@ -60,16 +60,6 @@ vcc3v3_sys: regulator-vcc3v3-sys { vin-supply = <&vcc5v0_sys>; };
- vcc5v0_host: regulator-vcc5v0-host { - compatible = "regulator-fixed"; - gpio = <&gpio4 RK_PA3 GPIO_ACTIVE_LOW>; - pinctrl-names = "default"; - pinctrl-0 = <&vcc5v0_host_en>; - regulator-name = "vcc5v0_host"; - regulator-always-on; - vin-supply = <&vcc5v0_sys>; - }; - vcc5v0_sys: regulator-vcc5v0-sys { compatible = "regulator-fixed"; regulator-name = "vcc5v0_sys"; @@ -527,10 +517,10 @@ pmic_int_l: pmic-int-l { }; };
- usb2 { - vcc5v0_host_en: vcc5v0-host-en { + usb { + cy3304_reset: cy3304-reset { rockchip,pins = - <4 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>; + <4 RK_PA3 RK_FUNC_GPIO &pcfg_output_high>; }; };
@@ -597,7 +587,6 @@ u2phy1_otg: otg-port { };
u2phy1_host: host-port { - phy-supply = <&vcc5v0_host>; status = "okay"; }; }; @@ -609,6 +598,29 @@ &usbdrd3_1 { &usbdrd_dwc3_1 { status = "okay"; dr_mode = "host"; + pinctrl-names = "default"; + pinctrl-0 = <&cy3304_reset>; + #address-cells = <1>; + #size-cells = <0>; + + hub_2_0: hub@1 { + compatible = "usb4b4,6502", "usb4b4,6506"; + reg = <1>; + peer-hub = <&hub_3_0>; + reset-gpios = <&gpio4 RK_PA3 GPIO_ACTIVE_HIGH>; + vdd-supply = <&vcc1v2_phy>; + vdd2-supply = <&vcc3v3_sys>; + + }; + + hub_3_0: hub@2 { + compatible = "usb4b4,6500", "usb4b4,6504"; + reg = <2>; + peer-hub = <&hub_2_0>; + reset-gpios = <&gpio4 RK_PA3 GPIO_ACTIVE_HIGH>; + vdd-supply = <&vcc1v2_phy>; + vdd2-supply = <&vcc3v3_sys>; + }; };
&usb_host1_ehci {