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memory: Add STM32 Octo Memory Manager driver

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Octo Memory Manager driver (OMM) manages:
  - the muxing between 2 OSPI busses and 2 output ports.
    There are 4 possible muxing configurations:
      - direct mode (no multiplexing): OSPI1 output is on port 1 and OSPI2
        output is on port 2
      - OSPI1 and OSPI2 are multiplexed over the same output port 1
      - swapped mode (no multiplexing), OSPI1 output is on port 2,
        OSPI2 output is on port 1
      - OSPI1 and OSPI2 are multiplexed over the same output port 2
  - the split of the memory area shared between the 2 OSPI instances.
  - chip select selection override.
  - the time between 2 transactions in multiplexed mode.
  - check firewall access.

Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20250428-upstream_ospi_v6-v11-2-1548736fd9d2@foss.st.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
This commit is contained in:
Patrice Chotard
2025-04-28 10:58:31 +02:00
committed by Krzysztof Kozlowski
parent 4a98ec836a
commit 8181d061dc
3 changed files with 494 additions and 0 deletions
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17
drivers/memory/Kconfig
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@@ -225,6 +225,23 @@ config STM32_FMC2_EBI
devices (like SRAM, ethernet adapters, FPGAs, LCD displays, ...) on
SOCs containing the FMC2 External Bus Interface.
config STM32_OMM
tristate "STM32 Octo Memory Manager"
depends on SPI_STM32_OSPI || COMPILE_TEST
help
This driver manages the muxing between the 2 OSPI busses and
the 2 output ports. There are 4 possible muxing configurations:
- direct mode (no multiplexing): OSPI1 output is on port 1 and OSPI2
output is on port 2
- OSPI1 and OSPI2 are multiplexed over the same output port 1
- swapped mode (no multiplexing), OSPI1 output is on port 2,
OSPI2 output is on port 1
- OSPI1 and OSPI2 are multiplexed over the same output port 2
It also manages :
- the split of the memory area shared between the 2 OSPI instances.
- chip select selection override.
- the time between 2 transactions in multiplexed mode.
source "drivers/memory/samsung/Kconfig"
source "drivers/memory/tegra/Kconfig"