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The STM32MP15xx device errata document^[1] lists and explains the different device errata and explains associated workaround (SW and/or HW) if any.

This article aims to describe which workarounds are implemented in STM32MP15-Ecosystem-v1.0.0 release, among the ones proposed in STM32MP15xx device errata ^[1].

Here is the legend for the column "Status STM32MP15xx Rev.B" in the table below, which refers to the availability of a workaround for the described errata:

A = workaround available
P = partial workaround available

Here is the legend for the column "STM32MP15-Ecosystem-v1.0.0 Status" in the table below, which refers to the availability of a workaround in the STM32MP15-Ecosystem-v1.0.0 release:

I = workaround Implemented
P = workaround Partialy implemented
N= workaround Not implemented

Fly over the letters in the columns to show legend locally.

Function	Section	Limitation	Status STM32MP15xx Rev.B	Status STM32MP15-Ecosystem-v1.0.0	Workaround implemented in STM32MP15 ecosystem
Arm^® Cortex^®-A7 core	2.1.1	Memory locations might be accessed speculatively due to instruction fetches when HCR.VM is set	A	N	Workaround not implemented: STM32MPU Embedded Software distribution does not activate Cortex^®-A7 hypervisor mode and so Virtual Memory second stage of translation. It is customer responsibility to implement the workaround if hypervisor mode used in its product.
	2.1.2	Cache maintenance by set/way operations can execute out of order	A	N	Limited impact on system. Implementation proposal under review at community level. Patch coming soon.
	2.1.4	PMU event counter 0x14 does not increment correctly	A	N	No impact on system. Minor impact performance measurement. No workaround provided by ARM for Linux kernel PMU driver.
Arm^® Cortex^®-M4 core	2.2.1	Interrupted loads to SP can cause erroneous behavior	A	N	Limitation only on hand-written assembly code. Customer to implement workaround in its product assembly code.
	2.2.2	VDIV or VSQRT instructions might not complete correctly when very short ISRs are used	A	N	STM32CubeMP1 Package provided as example. It is customer responsibility to implement one of the proposed workarounds according to its user code and product configuration.
	2.2.3	Store immediate overlapping exception return operation might vector to incorrect interrupt	A	N	Impact on system is minor. Workaround to be implemented by customer according to its MPU configuration.
System	2.3.1	TPIU fails to output sync after the pattern generator is disabled in Normal mode	A	N	No workaround implemented. No impact on system, issue happens only trace port.
	2.3.3	HSE external oscillator required in some LTDC use cases	P	I	HW implementation of external oscillator connected to the HSE pins available on STM32MP157C-EV1 MB1263 Rev.C (aka "MB1263C") and STM32MP157X-DKX MB1272 Rev.C (aka "MB1272C") HSE configuration implemented in TF-A fdts/stm32mp157c-ed1.dts for STM32MP157C-EV1 MB1263 and fdts/stm32mp157c-dk1.dts for STM32MP157X-DKX MB1272
	2.3.4	RCC cannot exit Stop and LP-Stop modes	A	I	Implemented in TF-A plat/st/stm32mp1/bl2_plat_setup.c#L279
	2.3.5	Incorrect reset of glitch-free kernel clock switch	P	I	STPMIC1 performs a VDDCORE reset on NRST activation, by default
	2.3.6	Limitation of aclk/hclk5/hclk6 to 200 MHz when used as SDMMC1/2 kernel clock	P	I	Implemented in TF-A fdts with a clock tree that uses a SDMMC1/SDMMC2 kernel clock source that is not the aclk/hclk5/hclk6 bus clock
DDRPHYC	2.4.1	DDRPHYC overconsumption upon reset or Standby mode exit	A	P	DDRPHYC is correctly reinitialized by TF-A after reset and Standby mode exit. Issue remains in case of Cortex^®-M4 standalone wake-up as TF-A not executed and so DDRPHYC not reinitialized in such case.
DMAMUX	2.5.4	Wrong input DMA request routed upon specific DMAMUX_CxCR register write coinciding with synchronization event	A	P	Not applicable in OpenSTLinux distribution as DMA synchronous mode not used. Customer responsibility to provide the right DMAMUX signal polarity configuration when calling HAL_DMAEx_ConfigMuxSync() provided by STM32CubeMP1 Package Drivers/STM32MP1xx_HAL_Driver/Src/stm32mp1xx_hal_dma_ex.c#L320 .
QUADSPI	2.6.1	Memory-mapped read of last memory byte fails	P	A	Implemented in OpenSTLinux distribution drivers/spi/spi-stm32-qspi.c#L452
ADC	2.7.1	ADC ANA0/ANA1 resolution limited when Gigabit Ethernet is used	P	P	Customer should implement workaround by limiting ADC data resolution in OpenSTLinux distribution device tree configuration or in its STM32CubeMP1 Package based application.
ADC	2.7.2	ADC missing codes in differential 16-bit static acquisition	P	P	Customer should implement workaround by limiting ADC data resolution in OpenSTLinux distribution device tree configuration or in its STM32CubeMP1 Package based application.
DTS	2.8.1	Mode using PCLK & LSE (REFCLK_SEL = 1) should not be used	P	I	Implemented in OpenSTLinux distribution drivers/thermal/st/stm_thermal.c#L215
TIM	2.10.1	One-pulse mode trigger not detected in master-slave reset + trigger configuration	P	N	Proposed workaround is only a recommendation
LPTIM	2.11.1	MCU may remain stuck in LPTIM interrupt when entering Stop mode	A	N	Interrupt not used in OpenSTLinux distribution. Workaround not implemented in STM32CubeMP1 Package. It is customer responsibility to implement it in MspDeinit().
LPTIM	2.11.2	MCU may remain stuck in LPTIM interrupt when clearing event flag	P	I	Interrupt not used in OpenSTLinux distribution. Implemented in STM32CubeMP1 Package Drivers/STM32MP1xx_HAL_Driver/Src/stm32mp1xx_hal_lptim.c#L1413
RTC and TAMP	2.12.2	Calendar initialization may fail in case of consecutive INIT mode entry	A	I	Implemented in OpenSTLinux distribution drivers/rtc/rtc-stm32.c#L276
I2C	2.13.1	Wrong data sampling when data setup time (tSU;DAT) is shorter than one I2C kernel clock period	P	I	Implemented in TF-A fdts with a clock tree configuring I2C kernel clock source greater than 20MHz. Valid for both OpenSTLinux distribution and STM32CubeMP1 Package.
	2.13.2	Spurious bus error detection in master mode	A	N	Fix coming soon for OpenSTLinux distribution Workaround implemented in STM32CubeMP1 Package Drivers/STM32MP1xx_HAL_Driver/Src/stm32mp1xx_hal_i2c.c
	2.13.3	Spurious master transfer upon own slave address match	P	P	Multi-mastering mode implementation of STM32CubeMP1 Package I2C HAL driver prevents to enter in such case.
SPI	2.14.1	Master data transfer stall at system clock much faster than SCK	A	A	SPI is disabled after each EOT in OpenSTLinux distribution drivers/spi/spi-stm32.c and in STM32CubeMP1 Package Drivers/STM32MP1xx_HAL_Driver/Src/stm32mp1xx_hal_spi.c .
	2.14.2	Corrupted CRC return at non-zero UDRDET setting	P	N	Slave mode & CRC not supported in OpenSTLinux distribution. Not implemented in STM32CubeMP1 Package.
	2.14.3	TXP interrupt occurring while SPI disabled	A	I	Implemented in OpenSTLinux distribution, drivers/spi/spi-stm32.c ensures that all interrupts are disabled before the SPI is disabled. Implemented in STM32CubeMP1 Package Drivers/STM32MP1xx_HAL_Driver/Src/stm32mp1xx_hal_spi.c .
ETH	2.15.2	Rx DMA may fail to recover upon DMA restart following a bus error, with Rx timestamping enabled	A	N
	2.15.3	Tx DMA may halt while fetching TSO header under specific conditions	A	N
	2.15.4	Spurious receive watchdog timeout interrupt	A	N
	2.15.5	Incorrect flexible PPS output interval under specific conditions	A	N
	2.15.6	Packets dropped in RMII 10Mbps mode due to fake dribble and CRC error	A	N
	2.15.7	ARP offload function not effective	A	P	Customer to activate ARP software support in OpenSTLinux distribution.

1. References[edit | edit source]

↑ ^1.0 ^1.1 STM32MP15 Errata sheets

[errata-1] 1.0 ^1.1 STM32MP15 Errata sheets

[1]

STM32MP15 ecosystem errata sheet

1. References[edit | edit source]