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doc: release-notes-4-2: new DTS properties for the xSPI of STM32 devices

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Change to apply on the DTS of STM32 soc and boards with xSPI nodes

Signed-off-by: Francois Ramu <francois.ramu@st.com>
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Francois Ramu 2025-04-16 09:35:57 +02:00 • committed by Benjamin Cabé
commit 22ca514ddc
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doc/releases/migration-guide-4.2.rst
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@ -360,6 +360,19 @@ SPI
* Renamed the device tree property ``port_sel`` to ``port-sel``.
* Renamed the device tree property ``chip_select`` to ``chip-select``.
xSPI
====
* On STM32 devices, external memories device tree descriptions for size and address are now split
in two separate properties to comply with specification recommendations.
For instance, following external flash description ``reg = <0x70000000 DT_SIZE_M(64)>; /* 512 Mbits /``
is changed to ``reg = <0>;`` ``size = <DT_SIZE_M(512)>; / 512 Mbits */``.
Note that the property gives the actual size of the memory device in bits.
Previous mapping address information is now described in xspi node at SoC dtsi level.
Other subsystems
****************