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ricardosalvetiricardosalveti
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rb3gen2: power up the xHCI host controller (#799)
This patch is **Pending** - not sure if we want to hold merging it in until it has been posted in the final form. In any case, here it is for reference. [Documentation](https://docs.qualcomm.com/bundle/publicresource/topics/80-70017-8/pcie.html?vproduct=1601111740013072&version=1.3&facet=Device%20Interfaces#pcie-software-support-for-usb) **Notes** - Requires the xHCI Renesas firmware in `/lib/firmware/renesas_usb_fw.mem` **Test for my particular use case (important bit, notice the Gigabit Ethernet device)** ``` root@qcs6490-rb3gen2-core-kit:~# lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. Hub Bus 001 Device 003: ID 2109:2812 VIA Labs, Inc. VL812 Hub Bus 001 Device 004: ID 24f0:0140 Metadot Das Keyboard 4 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 002: ID 05e3:0625 Genesys Logic, Inc. USB3.2 Hub Bus 002 Device 003: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet Bus 002 Device 004: ID 2109:0812 VIA Labs, Inc. VL812 Hub ```
2 parents a138e57 + c748ea1 commit 96fe032

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‎recipes-kernel/linux/linux-yocto-dev.bbappend‎

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@@ -12,6 +12,7 @@ SRC_URI:append:qcom = " \
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file://qcm6490-board-dts/0001-arm64-dts-qcom-sc7280-Add-support-for-camss.patch \
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file://qcm6490-board-dts/0002-arm64-dts-qcom-qcs6490-rb3gen2-vision-mezzanine-Add-.patch \
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file://qcm6490-board-dts/0002-media-dt-bindings-update-clocks-for-sc7280-camss.patch \
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file://qcm6490-board-dts/0001-PENDING-enable-xHCI.patch \
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file://workarounds/0001-QCLINUX-arm64-dts-qcom-qcm6490-disable-sdhc1-for-ufs.patch \
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file://workarounds/0001-PENDING-arm64-dts-qcom-Remove-voltage-vote-support-f.patch \
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file://drivers/0003-PCI-Add-new-start_link-stop_link-function-ops.patch \

‎recipes-kernel/linux/linux-yocto-dev/configs/qcom.cfg‎

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@@ -9,3 +9,4 @@ CONFIG_CLK_QCM2290_GPUCC=m
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# RB3
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CONFIG_PCI_PWRCTL=y
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CONFIG_PCI_PWRCTRL_TC956X=m
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CONFIG_USB_XHCI_PCI_RENESAS=m

‎recipes-kernel/linux/linux-yocto-dev/qcm6490-board-dts/0001-PENDING-enable-xHCI.patch‎

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@@ -0,0 +1,133 @@
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From 6364f1eef332977bec795bd5237c8b1aa33bb88b Mon Sep 17 00:00:00 2001
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From: Jorge Ramirez-Ortiz <[email protected]>
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Date: Wed, 5 Mar 2025 11:11:22 +0100
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Subject: [PATCH] dts: rb3gen2: enable Renesas xHCI
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Make sure relevant power is on and resets are let go of, to make the USB
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Ethernet adapter show up.
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Ported to 6.14 from an original patch by Bjorn Andersson.
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Link: https://github.com/quic-bjorande/linux/commit/ef0d4badf252c10883a369e8fb217799868158b0
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Signed-off-by: Bjorn Andersson <[email protected]>
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Upstream-Status: Pending
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---
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arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 76 ++++++++++++++++++++
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1 file changed, 76 insertions(+)
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diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
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index 13dbb24a3179..73959e5095bf 100644
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--- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
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+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
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@@ -243,6 +243,31 @@ vdd_ntn_1p8: regulator-vdd-ntn-1p8 {
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regulator-enable-ramp-delay = <10000>;
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};
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+ vreg-pcie0-1p05v {
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+ compatible = "regulator-fixed";
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+ regulator-name = "PCIE0_1.05V";
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+ gpio = <&pm7250b_gpios 4 GPIO_ACTIVE_HIGH>;
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+ regulator-min-microvolt = <1050000>;
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+ regulator-max-microvolt = <1050000>;
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+ enable-active-high;
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+ pinctrl-0 = <&upd_pwr_en2_state>;
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+ pinctrl-names = "default";
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+
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+ regulator-always-on;
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+ };
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+
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+ vreg-pcie0_3p3v-dual {
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+ compatible = "regulator-fixed";
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+ regulator-name = "PCIE0_3.3V_Dual";
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+ gpio = <&pm7250b_gpios 1 GPIO_ACTIVE_HIGH>;
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+ regulator-min-microvolt = <3300000>;
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+ regulator-max-microvolt = <3300000>;
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+ enable-active-high;
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+ pinctrl-0 = <&upd_pwr_en1_state>;
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+ pinctrl-names = "default";
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+
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+ regulator-always-on;
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+ };
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};
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&apps_rsc {
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@@ -780,6 +805,9 @@ pcie@0,0 {
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i2c-parent = <&i2c0 0x77>;
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+ pinctrl-0 = <&tc956x_rst_state>, <&upd_hub_rst_state>, <&usb_hub_rst_state>;
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+ pinctrl-names = "default";
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+
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reset-gpios = <&pm8350c_gpios 1 GPIO_ACTIVE_LOW>;
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pcie@1,0 {
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@@ -953,6 +981,27 @@ ntn_1p8_en: ntn-1p8-en-state {
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output-enable;
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power-source = <0>;
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};
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+
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+ upd_hub_rst_state: upd-hub-rst-state {
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+ pins = "gpio4";
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+ function = "normal";
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+
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+ bias-disable;
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+ input-disable;
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+ output-enable;
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+ output-high;
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+ power-source = <0>;
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+ };
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+
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+ tc956x_rst_state: tc956x-rst-state {
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+ pins = "gpio1";
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+ function = "normal";
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+
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+ bias-disable;
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+ input-disable;
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+ output-enable;
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+ power-source = <0>;
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+ };
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};
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&tlmm {
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@@ -1048,6 +1097,24 @@ &edp_hot_plug_det {
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};
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&pm7250b_gpios {
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+ upd_pwr_en1_state: upd-pwr-en1-state {
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+ pins = "gpio1";
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+ function = "normal";
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+
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+ output-enable;
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+ input-disable;
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+ power-source = <0>;
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+ };
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+
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+ upd_pwr_en2_state: upd-pwr-en2-state {
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+ pins = "gpio4";
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+ function = "normal";
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+
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+ output-enable;
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+ input-disable;
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+ power-source = <0>;
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+ };
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+
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lt9611_rst_pin: lt9611-rst-state {
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pins = "gpio2";
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function = "normal";
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@@ -1101,4 +1168,13 @@ sd_cd: sd-cd-state {
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function = "gpio";
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bias-pull-up;
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};
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+
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+ usb_hub_rst_state: usb-hub-rst-state {
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+ pins = "gpio162";
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+ function = "gpio";
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+
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+ drive-strength = <2>;
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+ output-low;
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+ bias-disable;
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+ };
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};
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--
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2.34.1
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