From 4d03f476a709962dc9789273cedaecf1f9bfae57 Mon Sep 17 00:00:00 2001 From: Nitin Yadav Date: Thu, 6 Apr 2023 13:29:36 +0530 Subject: arm: mach-k3: Workaround errata ID i2331 Errata doc: https://www.ti.com/lit/pdf/sprz457 Errata ID i2331 CPSW: Device lockup when reading CPSW registers Details: A device lockup can occur during the second read of any CPSW subsystem register after any MAIN domain power on reset (POR). A MAIN domain POR occurs using the hardware MCU_PORz signal, or via software using CTRLMMR_RST_CTRL.SW_MAIN_POR or CTRLMMR_MCU_RST_CTRL.SW_MAIN_POR. After these resets, the processor and internal bus structures may get into a state which is only recoverable with full device reset using MCU_PORz. Due to this errata, Ethernet boot should not be used on this device. Workaround(s): To avoid the lockup, a warm reset should be issued after a MAIN domain POR and before any access to the CPSW registers. The warm reset realigns internal clocks and prevents the lockup from happening. Workaround above errata by calling do_reset() in case of cold boot in order to trigger warm reset. This needs enabling SYSRESET driver in R5 SPL to enable TI SCI reset driver. Signed-off-by: Nitin Yadav Signed-off-by: Vignesh Raghavendra Reviewed-by: Bryan Brattlof --- configs/am64x_evm_r5_defconfig | 3 +++ 1 file changed, 3 insertions(+) (limited to 'configs') diff --git a/configs/am64x_evm_r5_defconfig b/configs/am64x_evm_r5_defconfig index b75cae6d803..bb705a1c3ce 100644 --- a/configs/am64x_evm_r5_defconfig +++ b/configs/am64x_evm_r5_defconfig @@ -169,3 +169,6 @@ CONFIG_USB_GADGET_VENDOR_NUM=0x0451 CONFIG_USB_GADGET_PRODUCT_NUM=0x6165 CONFIG_USB_GADGET_DOWNLOAD=y CONFIG_FS_FAT_MAX_CLUSTSIZE=16384 +CONFIG_SYSRESET=y +CONFIG_SPL_SYSRESET=y +CONFIG_SYSRESET_TI_SCI=y -- cgit v1.2.3