Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-09-21 15:12:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

board: zynqmp: Fix for wrong AMS setting by ROM

Browse source 
A bug in the ZynqMP bootrom sets the PS_SYSMON_ANALOG_BUS register
at 0xFFA50914 to the wrong value 0x3201. This causes the AMS to
exchange the PS supply voltages 0 and 1. On Xilinx boards this is
not noticeable since these are tied together, it's only really
noticeable if banks 500 and 501 have different supplies. Xilinx' tech
support reported this undocumented register to be the cause, and
this patch applies a fix for all boards by programming the correct
value.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Mike Looijmans 2019-10-18 07:34:13 +02:00 committed by Michal Simek
parent fe1eb9945b
commit dfbe492ede
1 changed files with 6 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
board/xilinx/zynqmp/zynqmp.c
View file

@ -359,6 +359,9 @@ static int multi_boot(void)
return 0;
}
#define PS_SYSMON_ANALOG_BUS_VAL 0x3210
#define PS_SYSMON_ANALOG_BUS_REG 0xFFA50914
int board_init(void)
{
#if defined(CONFIG_ZYNQMP_FIRMWARE)
@ -378,6 +381,9 @@ int board_init(void)
printf("EL Level:\tEL%d\n", current_el());
/* Bug in ROM sets wrong value in this register */
writel(PS_SYSMON_ANALOG_BUS_VAL, PS_SYSMON_ANALOG_BUS_REG);
#if defined(CONFIG_FPGA) && defined(CONFIG_FPGA_ZYNQMPPL) && \
!defined(CONFIG_SPL_BUILD) || (defined(CONFIG_SPL_FPGA_SUPPORT) && \
defined(CONFIG_SPL_BUILD))