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

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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.
This is applicable only to RevY (REV_ID 0x1003)

Fixes #38933

Signed-off-by: Alexandre Bourdiol <alexandre.bourdiol@st.com>
This commit is contained in:
Alexandre Bourdiol 2021-09-29 16:55:01 +02:00 • committed by Anas Nashif
commit 2d4b1b6cba
1 changed files with 10 additions and 0 deletions
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10
soc/arm/st_stm32/stm32h7/soc_m7.c
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@ -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;
}