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imx-atf: Disable Cortex-M4 debug console 

The Cortex-M4 uses the UART4 as debug console, and it is
shared with the Cortex-A53. This commit disables it for the
ConnectCore 8M Mini DVK board to avoid conflicts.

Signed-off-by: Arturo Buzarra <arturo.buzarra@digi.com>
This commit is contained in:
Arturo Buzarra 2021-02-01 17:15:04 +01:00
parent be7de5559c
commit a306da408a
2 changed files with 56 additions and 1 deletions
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54
meta-digi-arm/recipes-bsp/imx-atf/imx-atf/0001-imx8mm-Disable-M4-debug-console.patch Normal file
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@ -0,0 +1,54 @@
From 32f0fe2d607f165fbf4ab6b5c21b147b68ab46e2 Mon Sep 17 00:00:00 2001
From: Gabriel Valcazar <gabriel.valcazar@digi.com>
Date: Fri, 29 Jan 2021 11:21:07 +0100
Subject: [PATCH] imx8mm: Disable M4 debug console
The Cortex-M4 uses the UART4 as debug console, and it is
shared with the Cortex-A53.
Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>
---
plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c b/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
index 049192880..f7aada323 100644
--- a/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
+++ b/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
@@ -58,7 +58,7 @@ static const struct imx_rdc_cfg rdc[] = {
RDC_MDAn(RDC_MDA_M4, DID1),
/* peripherals domain permission */
- RDC_PDAPn(RDC_PDAP_UART4, D1R | D1W),
+ /*RDC_PDAPn(RDC_PDAP_UART4, D1R | D1W),*/
RDC_PDAPn(RDC_PDAP_UART2, D0R | D0W),
/* memory region */
@@ -129,7 +129,7 @@ static void bl31_tzc380_setup(void)
void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
u_register_t arg2, u_register_t arg3)
{
- static console_uart_t console;
+ /*static console_uart_t console;*/
int i;
/* Enable CSU NS access permission */
@@ -144,11 +144,11 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
imx_csu_init(csu_cfg);
imx8m_caam_init();
-
- console_imx_uart_register(IMX_BOOT_UART_BASE, IMX_BOOT_UART_CLK_IN_HZ,
+ /* Uncomment to use the M4 debug console (shared with A53 UART4) */
+ /*console_imx_uart_register(IMX_BOOT_UART_BASE, IMX_BOOT_UART_CLK_IN_HZ,
IMX_CONSOLE_BAUDRATE, &console);
- /* This console is only used for boot stage */
- console_set_scope(&console.console, CONSOLE_FLAG_BOOT);
+ This console is only used for boot stage
+ console_set_scope(&console.console, CONSOLE_FLAG_BOOT);*/
/*
* tell BL3-1 where the non-secure software image is located
--
2.17.1

3
meta-digi-arm/recipes-bsp/imx-atf/imx-atf_2.2.bb
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@ -1,4 +1,4 @@
# Copyright (C) 2017-2020 NXP
# Copyright (C) 2017-2021 NXP
DESCRIPTION = "i.MX ARM Trusted Firmware"
SECTION = "BSP"
@ -14,6 +14,7 @@ SRC_URI = "${ATF_SRC};branch=${SRCBRANCH} \
SRCREV = "c949a888e909811db191500c51456391dff61284"
SRC_URI_append_ccimx8mn = " file://0001-imx8mn-Disable-M7-debug-console.patch"
SRC_URI_append_ccimx8mm = " file://0001-imx8mm-Disable-M4-debug-console.patch"
S = "${WORKDIR}/git"