From 50290805b3e028fa4446b7901462bba0bddcde86 Mon Sep 17 00:00:00 2001 From: Sergey Matyukevich Date: Tue, 13 Oct 2020 23:16:20 +0300 Subject: [PATCH] board/udoo/mx6qdl: disable usb host in device tree After BSP update Udoo Quad/Dual board once again hangs on boot. On a new kernel disabling CONFIG_USB option is not enough to work around the troublesome usb host on Udoo Quad/Dual board. So in order to be future-proof it makes sense to disable usbh1 block in device tree rather than fine-tune kernel configuration after BSP updates. Signed-off-by: Sergey Matyukevich Signed-off-by: Thomas Petazzoni --- board/udoo/mx6qdl/linux.fragment | 1 - .../linux/0000-udoo-disable-usbh1.patch | 26 +++++++++++++++++++ configs/mx6udoo_defconfig | 2 +- 3 files changed, 27 insertions(+), 2 deletions(-) delete mode 100644 board/udoo/mx6qdl/linux.fragment create mode 100644 board/udoo/mx6qdl/patches/linux/0000-udoo-disable-usbh1.patch diff --git a/board/udoo/mx6qdl/linux.fragment b/board/udoo/mx6qdl/linux.fragment deleted file mode 100644 index 1d2509982b..0000000000 --- a/board/udoo/mx6qdl/linux.fragment +++ /dev/null @@ -1 +0,0 @@ -# CONFIG_USB is not set diff --git a/board/udoo/mx6qdl/patches/linux/0000-udoo-disable-usbh1.patch b/board/udoo/mx6qdl/patches/linux/0000-udoo-disable-usbh1.patch new file mode 100644 index 0000000000..d151a40d6e --- /dev/null +++ b/board/udoo/mx6qdl/patches/linux/0000-udoo-disable-usbh1.patch @@ -0,0 +1,26 @@ +[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang + +Currently the kernel hangs when USB Host1 is enabled due to the lack of +support for controlling the USB hub clock and GPIO reset line. + +Peter Chen has made several attempts to fix this problem, but his series +has not been applied yet, so better disable USB host1 for now to avoid +the kernel hang. + +Signed-off-by: Fabio Estevam +--- + +diff --git a/arch/arm/boot/dts/imx6qdl-udoo.dtsi b/arch/arm/boot/dts/imx6qdl-udoo.dtsi +index 828dd20cd27d..c9e122865312 100644 +--- a/arch/arm/boot/dts/imx6qdl-udoo.dtsi ++++ b/arch/arm/boot/dts/imx6qdl-udoo.dtsi +@@ -292,7 +292,8 @@ &usbh1 { + pinctrl-0 = <&pinctrl_usbh>; + vbus-supply = <®_usb_h1_vbus>; + clocks = <&clks IMX6QDL_CLK_CKO>; +- status = "okay"; ++ /* currently USB support causes a kernel hang. Disable it for now */ ++ status = "disabled"; + }; + + &usbotg { diff --git a/configs/mx6udoo_defconfig b/configs/mx6udoo_defconfig index d208f5846e..be56f3014e 100644 --- a/configs/mx6udoo_defconfig +++ b/configs/mx6udoo_defconfig @@ -3,6 +3,7 @@ BR2_cortex_a9=y BR2_ARM_ENABLE_NEON=y BR2_ARM_ENABLE_VFP=y BR2_ARM_FPU_VFPV3=y +BR2_GLOBAL_PATCH_DIR="board/udoo/mx6qdl/patches" # Linux headers same as kernel, a 5.8 series BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_8=y BR2_TARGET_GENERIC_GETTY_PORT="ttymxc1" @@ -20,7 +21,6 @@ BR2_LINUX_KERNEL=y BR2_LINUX_KERNEL_CUSTOM_VERSION=y BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.8.13" BR2_LINUX_KERNEL_DEFCONFIG="imx_v6_v7" -BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/udoo/mx6qdl/linux.fragment" BR2_LINUX_KERNEL_DTS_SUPPORT=y BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx6q-udoo imx6dl-udoo" # required tools to create the SD card image -- 2.30.2