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soc: arm: stm32h7: implement workaround for AXI SRAM data corruption #38981

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Merged
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Oct 21, 2021
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soc: arm: stm32h7: implement workaround for AXI SRAM data corruption #38981

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10 changes: 10 additions & 0 deletions soc/arm/st_stm32/stm32h7/soc_m7.c
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,16 @@ static int stm32h7_init(const struct device *arg)
while (LL_PWR_IsActiveFlag_VOS() == 0) {
}

/* Errata ES0392 Rev 8:
* 2.2.9: Reading from AXI SRAM may lead to data read corruption
* Workaround: Set the READ_ISS_OVERRIDE bit in the AXI_TARG7_FN_MOD
* register.
* Applicable only to RevY (REV_ID 0x1003)
*/
if (LL_DBGMCU_GetRevisionID() == 0x1003) {
MODIFY_REG(GPV->AXI_TARG7_FN_MOD, 0x1, 0x1);
}

return 0;
}

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