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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-17 11:44:41 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-17 11:44:41 -0700 |
commit | fdcec00405fae0befdd7bbcbe738b7325e5746fb (patch) | |
tree | 094b09f25103af1a690ddfe3d6682aac909a7af0 /Documentation/devicetree/bindings/arm/stm32/mlahb.txt | |
parent | 7636b7589f81940c6d6518786f93de74495575fa (diff) | |
parent | 93f1d3e4b59cf2e7ef31eaf1131480897b040e97 (diff) | |
download | linux-fdcec00405fae0befdd7bbcbe738b7325e5746fb.tar.bz2 |
Merge tag 'rproc-v5.3' of git://github.com/andersson/remoteproc
Pull remoteproc updates from Bjorn Andersson:
"This adds support for the STM32 remoteproc, additional i.MX platforms
with Cortex M4 remoteprocs and Qualcomm's QCS404 Compute DSP.
Also initial support for vendor specific resource table entries and
support for unprocessed Qualcomm firmware files"
* tag 'rproc-v5.3' of git://github.com/andersson/remoteproc:
remoteproc: stm32: fix building without ARM SMCC
remoteproc: qcom: q6v5-mss: Fix build error without QCOM_MDT_LOADER
remoteproc: copy parent dma_pfn_offset for vdev
remoteproc: qcom: q6v5-mss: Support loading non-split images
soc: qcom: mdt_loader: Support loading non-split images
remoteproc: stm32: add an ST stm32_rproc driver
dt-bindings: remoteproc: add bindings for stm32 remote processor driver
dt-bindings: stm32: add bindings for ML-AHB interconnect
remoteproc: Use struct_size() helper
remoteproc: add vendor resources handling
remoteproc: imx: Fix typo in "failed"
remoteproc: imx: Broaden the Kconfig selection logic
remoteproc,rpmsg: add missing MAINTAINERS file entries
remoteproc: qcom: qdsp6-adsp: Add support for QCS404 CDSP
dt-bindings: remoteproc: Rename and amend Hexagon v56 binding
Diffstat (limited to 'Documentation/devicetree/bindings/arm/stm32/mlahb.txt')
-rw-r--r-- | Documentation/devicetree/bindings/arm/stm32/mlahb.txt | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/stm32/mlahb.txt b/Documentation/devicetree/bindings/arm/stm32/mlahb.txt new file mode 100644 index 000000000000..25307aa1eb9b --- /dev/null +++ b/Documentation/devicetree/bindings/arm/stm32/mlahb.txt @@ -0,0 +1,37 @@ +ML-AHB interconnect bindings + +These bindings describe the STM32 SoCs ML-AHB interconnect bus which connects +a Cortex-M subsystem with dedicated memories. +The MCU SRAM and RETRAM memory parts can be accessed through different addresses +(see "RAM aliases" in [1]) using different buses (see [2]) : balancing the +Cortex-M firmware accesses among those ports allows to tune the system +performance. + +[1]: https://www.st.com/resource/en/reference_manual/dm00327659.pdf +[2]: https://wiki.st.com/stm32mpu/wiki/STM32MP15_RAM_mapping + +Required properties: +- compatible: should be "simple-bus" +- dma-ranges: describes memory addresses translation between the local CPU and + the remote Cortex-M processor. Each memory region, is declared with + 3 parameters: + - param 1: device base address (Cortex-M processor address) + - param 2: physical base address (local CPU address) + - param 3: size of the memory region. + +The Cortex-M remote processor accessed via the mlahb interconnect is described +by a child node. + +Example: +mlahb { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + dma-ranges = <0x00000000 0x38000000 0x10000>, + <0x10000000 0x10000000 0x60000>, + <0x30000000 0x30000000 0x60000>; + + m4_rproc: m4@10000000 { + ... + }; +}; |