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Stephan Gerhold ad7e967738 serial: serial_msm: Delay initialization to let pins stabilize 
For some reason, the DragonBoard 410c aborts autoboot immediately if
U-Boot is started without LK. It looks like it picks up a single broken
character via serial and therefore believes a key was pressed to abort
autoboot.

After some debugging, it seems like adding some delay after pinctrl
setup but before UART initialization fixes the issue. It's also worth
mentioning that unlike when booting from LK, the pinctrl setup is
actually necessary when booting U-Boot without LK since UART is broken
if the pinctrl line is removed.

I suspect that reconfiguring the pins might take some time to stabilize
and if the UART controller is enabled too quickly it will pick up some
random noise. Adding a few milliseconds of delay fixes the issue and
shouldn't have any other negative side effects.

3ms seems to be the minimum delay required in my tests, use 5ms instead
just to be sure.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
2021-07-23 18:53:46 -04:00
..
adc dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
ata various minor sandbox improvements 2021-07-07 13:34:42 -04:00
axi dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
bios_emulator treewide: Convert macro and uses of __section(foo) to __section("foo") 2021-05-24 14:21:30 -04:00
block blk: Support iteration 2021-07-21 10:27:35 -06:00
bootcount am335x, guardian: software update available status is stored in AM3352 RTC scracth register 2021-07-15 17:56:03 +05:30
bus bus: ti-sysc: change in a normal driver 2021-03-22 19:23:27 +13:00
button dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
cache dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
clk i.MX 2021-07-17 10:52:21 -04:00
core dm: core: fix no null pointer detection in ofnode_get_addr_size_index() 2021-07-21 10:27:35 -06:00
cpu dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
crypto dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
ddr ppc: Remove T4160RDB board 2021-07-07 19:52:24 -04:00
demo common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
dfu dfu: add error callback 2021-06-18 10:09:41 +02:00
dma dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
fastboot fastboot: Fix possible buffer overrun 2021-04-12 17:44:55 -04:00
firmware dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
fpga arm: socfpga: Move Stratix10 and Agilex to use TARGET_SOCFPGA_SOC64 2021-03-08 10:59:10 +08:00
gpio i2c: pcf8575: Add support for 8 bit I2C IO expanders (like pca8574) 2021-07-23 07:13:25 -04:00
hwspinlock dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
i2c arm: Remove spear600 boards and the rest of SPEAr support 2021-07-07 22:22:42 -04:00
input dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
led dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
mailbox dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
memory memory: stm32-fmc2: migrate trace to dev and log macro 2021-01-13 09:52:58 +01:00
misc cros_ec: Use standard calls for recovery-request checking 2021-07-21 10:27:34 -06:00
mmc sandbox: mmc: Support fixed MMC devices 2021-07-21 10:27:35 -06:00
mtd mtd: spi-nor-ids: Add support for Macronix MX25V8035F and MX25R1635F 2021-07-10 15:59:20 +02:00
mux dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
net board: synquacer: Initialize SCBM SMMU at board_init() 2021-07-23 18:53:45 -04:00
nvme dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
pch dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
pci pci: Require DM_PCI 2021-07-18 21:06:08 -04:00
pci_endpoint dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
phy i.MX 2021-07-17 10:52:21 -04:00
pinctrl pinctrl: Avoid coverity warning when checking width 2021-07-15 18:42:05 -04:00
power power: pmic: tps65941: Add compatible for LP876441 2021-07-15 17:56:04 +05:30
pwm dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
qe ppc: Remove TARGET_T1040QDS references 2021-04-10 08:04:42 -04:00
ram dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
reboot-mode reboot-mode: read the boot mode from RTC memory 2021-07-23 10:16:39 -04:00
remoteproc remoteproc: pru: Add support for various PRU cores on K3 AM65x SoCs 2021-07-15 17:56:04 +05:30
reset reset: Avoid a warning in devm_reset_bulk_get_by_node() 2021-07-15 18:42:05 -04:00
rng dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
rtc rtc: m41t62: fix wrong register use for set/reset ST bit 2021-07-15 19:06:49 -04:00
scsi dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
serial serial: serial_msm: Delay initialization to let pins stabilize 2021-07-23 18:53:46 -04:00
smem dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
soc soc: ti: pruss: Add a platform driver for PRUSS in TI SoCs 2021-07-15 17:56:04 +05:30
sound dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
spi i.MX 2021-07-17 10:52:21 -04:00
spmi dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
sysinfo sysinfo: rcar3: Add Renesas R-Car Gen3 sysinfo driver 2021-07-20 23:33:54 +02:00
sysreset sysreset: provide type of reset in do_reset cmd 2021-04-20 07:31:12 -04:00
tee tee: optee: sync cache on pre-reloc OP-TEE invocation 2021-07-23 07:13:25 -04:00
thermal dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
timer timer: nomadik-mtu: Use dev_read_addr_ptr() 2021-07-14 16:47:57 -04:00
tpm tpm: cr50: Drop unnecessary coral headers 2021-07-15 19:49:56 +08:00
ufs dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
usb usb: Enforce DM_USB migration for USB_HOST devices. 2021-07-18 21:05:31 -04:00
video Merge tag 'ti-v2021.10-rc1' of https://source.denx.de/u-boot/custodians/u-boot-ti 2021-07-19 08:29:24 -04:00
virtio dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
w1 various minor sandbox improvements 2021-07-07 13:34:42 -04:00
w1-eeprom dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
watchdog i.MX 2021-07-17 10:52:21 -04:00
xen dm: define LOG_CATEGORY for all uclass 2021-07-06 10:38:03 -06:00
Kconfig reboot-mode: add support for reboot mode control 2021-07-23 10:16:39 -04:00
Makefile reboot-mode: add support for reboot mode control 2021-07-23 10:16:39 -04:00