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arm64: zynqmp: Writing correct value to ANALOG_BUS

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The default register configuration after powerup for PSSYSMON_ANALOG_BUS
register is incorrect. Hence, fix this in SPL by writing correct fixed
value. It follows UG1085 chapter 'PS SYSMON Analog_Bus' and reflects commit
sw_apps:zynq ("056ca65d44549ce27f716d423e8dfdefeee7440c")
in Xilinx:embeddedsw[1].

[1] https://github.com/Xilinx/embeddedsw

Signed-off-by: Adrian Fiergolski <adrian.fiergolski@fastree3d.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Adrian Fiergolski 2021-06-08 12:37:23 +02:00 committed by Michal Simek
parent e3b64beda5
commit 3414712ba8
2 changed files with 16 additions and 0 deletions
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5
arch/arm/mach-zynqmp/include/mach/hardware.h
View File

@ -19,6 +19,11 @@
#define ZYNQMP_CRL_APB_BOOT_PIN_CTRL_OUT_EN_SHIFT 0
#define ZYNQMP_CRL_APB_BOOT_PIN_CTRL_OUT_VAL_SHIFT 8
#define ZYNQMP_AMS_PS_SYSMON_BASEADDR 0XFFA50800
#define ZYNQMP_AMS_PS_SYSMON_ANALOG_BUS ((ZYNQMP_AMS_PS_SYSMON_BASEADDR) \
+ 0x00000114)
#define ZYNQMP_PS_SYSMON_ANALOG_BUS_VAL 0x00003210
#define PS_MODE0 BIT(0)
#define PS_MODE1 BIT(1)
#define PS_MODE2 BIT(2)

11
board/xilinx/zynqmp/zynqmp.c
View File

@ -287,6 +287,17 @@ int board_early_init_f(void)
if (ret)
return ret;
/*
* PS_SYSMON_ANALOG_BUS register determines mapping between SysMon
* supply sense channel to SysMon supply registers inside the IP.
* This register must be programmed to complete SysMon IP
* configuration. The default register configuration after
* power-up is incorrect. Hence, fix this by writing the
* correct value - 0x3210.
*/
writel(ZYNQMP_PS_SYSMON_ANALOG_BUS_VAL,
ZYNQMP_AMS_PS_SYSMON_ANALOG_BUS);
/* Delay is required for clocks to be propagated */
udelay(1000000);
#endif