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https://github.com/AsahiLinux/u-boot
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bd9ff681bd
The baudrate configured in .config is taken by default by serial. If
change of baudrate is required then the .config needs to changed and
u-boot recompilation is required or the u-boot environment needs to be
updated.
To avoid this, support is added to fetch the baudrate directly from the
device tree file and update.
The serial, prints the log with the configured baudrate in the dtb.
The commit c4df0f6f31 ("arm: mvebu: Espressobin: Set default value for
$fdtfile env variable") is taken as reference for changing the default
environment variable.
The default environment stores the default baudrate value, When default
baudrate and dtb baudrate are not same glitches are seen on the serial.
So, the environment also needs to be updated with the dtb baudrate to
avoid the glitches on the serial.
Also add test to cover this new function.
Signed-off-by: Algapally Santosh Sagar <santoshsagar.algapally@amd.com>
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20230921112043.3144726-3-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2000-2010
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Andreas Heppel <aheppel@sysgo.de>
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*/
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#include <env_callback.h>
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#include <linux/stringify.h>
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#include <generated/environment.h>
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#ifdef DEFAULT_ENV_INSTANCE_EMBEDDED
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env_t embedded_environment __UBOOT_ENV_SECTION__(environment) = {
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ENV_CRC, /* CRC Sum */
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#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
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1, /* Flags: valid */
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#endif
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{
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#elif defined(DEFAULT_ENV_INSTANCE_STATIC)
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static char default_environment[] = {
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#elif defined(CONFIG_DEFAULT_ENV_IS_RW)
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char default_environment[] = {
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#else
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const char default_environment[] = {
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#endif
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#ifndef CONFIG_USE_DEFAULT_ENV_FILE
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#ifdef CONFIG_ENV_CALLBACK_LIST_DEFAULT
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ENV_CALLBACK_VAR "=" CONFIG_ENV_CALLBACK_LIST_DEFAULT "\0"
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#endif
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#ifdef CONFIG_ENV_FLAGS_LIST_DEFAULT
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ENV_FLAGS_VAR "=" CONFIG_ENV_FLAGS_LIST_DEFAULT "\0"
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#endif
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#ifdef CONFIG_USE_BOOTARGS
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"bootargs=" CONFIG_BOOTARGS "\0"
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#endif
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#ifdef CONFIG_BOOTCOMMAND
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"bootcmd=" CONFIG_BOOTCOMMAND "\0"
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#endif
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#if defined(CONFIG_BOOTDELAY)
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"bootdelay=" __stringify(CONFIG_BOOTDELAY) "\0"
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#endif
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#if !defined(CONFIG_OF_SERIAL_BAUD) && defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
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"baudrate=" __stringify(CONFIG_BAUDRATE) "\0"
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#endif
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#ifdef CONFIG_LOADS_ECHO
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"loads_echo=" __stringify(CONFIG_LOADS_ECHO) "\0"
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#endif
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#ifdef CONFIG_ETHPRIME
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"ethprime=" CONFIG_ETHPRIME "\0"
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#endif
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#ifdef CONFIG_USE_IPADDR
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"ipaddr=" CONFIG_IPADDR "\0"
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#endif
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#ifdef CONFIG_USE_SERVERIP
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"serverip=" CONFIG_SERVERIP "\0"
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#endif
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#ifdef CONFIG_SYS_DISABLE_AUTOLOAD
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"autoload=0\0"
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#endif
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#ifdef CONFIG_PREBOOT_DEFINED
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"preboot=" CONFIG_PREBOOT "\0"
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#endif
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#ifdef CONFIG_USE_ROOTPATH
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"rootpath=" CONFIG_ROOTPATH "\0"
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#endif
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#ifdef CONFIG_USE_GATEWAYIP
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"gatewayip=" CONFIG_GATEWAYIP "\0"
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#endif
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#ifdef CONFIG_USE_NETMASK
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"netmask=" CONFIG_NETMASK "\0"
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#endif
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#ifdef CONFIG_USE_HOSTNAME
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"hostname=" CONFIG_HOSTNAME "\0"
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#endif
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#ifdef CONFIG_USE_BOOTFILE
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"bootfile=" CONFIG_BOOTFILE "\0"
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#endif
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#ifdef CONFIG_SYS_LOAD_ADDR
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"loadaddr=" __stringify(CONFIG_SYS_LOAD_ADDR)"\0"
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#endif
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#if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
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"pcidelay=" __stringify(CONFIG_PCI_BOOTDELAY)"\0"
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#endif
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#ifdef CONFIG_ENV_VARS_UBOOT_CONFIG
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"arch=" CONFIG_SYS_ARCH "\0"
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#ifdef CONFIG_SYS_CPU
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"cpu=" CONFIG_SYS_CPU "\0"
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#endif
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#ifdef CONFIG_SYS_BOARD
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"board=" CONFIG_SYS_BOARD "\0"
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"board_name=" CONFIG_SYS_BOARD "\0"
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#endif
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#ifdef CONFIG_SYS_VENDOR
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"vendor=" CONFIG_SYS_VENDOR "\0"
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#endif
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#ifdef CONFIG_SYS_SOC
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"soc=" CONFIG_SYS_SOC "\0"
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#endif
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#ifdef CONFIG_ENV_IMPORT_FDT
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"env_fdt_path=" CONFIG_ENV_FDT_PATH "\0"
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#endif
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#endif
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#if defined(CONFIG_BOOTCOUNT_BOOTLIMIT) && (CONFIG_BOOTCOUNT_BOOTLIMIT > 0)
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"bootlimit=" __stringify(CONFIG_BOOTCOUNT_BOOTLIMIT)"\0"
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#endif
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#ifdef CONFIG_MTDIDS_DEFAULT
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"mtdids=" CONFIG_MTDIDS_DEFAULT "\0"
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#endif
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#ifdef CONFIG_MTDPARTS_DEFAULT
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"mtdparts=" CONFIG_MTDPARTS_DEFAULT "\0"
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#endif
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#ifdef CONFIG_EXTRA_ENV_TEXT
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/* This is created in the Makefile */
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CONFIG_EXTRA_ENV_TEXT
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#endif
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#ifdef CFG_EXTRA_ENV_SETTINGS
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CFG_EXTRA_ENV_SETTINGS
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#endif
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#ifdef CONFIG_OF_SERIAL_BAUD
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/* Padding for baudrate at the end when environment is writable */
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"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
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#endif
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"\0"
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#else /* CONFIG_USE_DEFAULT_ENV_FILE */
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#include "generated/defaultenv_autogenerated.h"
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#endif
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#ifdef DEFAULT_ENV_INSTANCE_EMBEDDED
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}
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#endif
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};
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#if !defined(USE_HOSTCC) && !defined(DEFAULT_ENV_INSTANCE_EMBEDDED)
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#include <env_internal.h>
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static_assert(sizeof(default_environment) <= ENV_SIZE,
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"Default environment is too large");
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#endif
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