2792cbf5d2
The existing compatible name for U-Boot's k3 system controller driver
i.e "ti,am625-system-controller" has been added to linux[1] device-tree.
This compatible in kernel is meant for configuring the Control Module
registers (CTRL_MMR0).
However in U-Boot, the matching driver was being used to load the system
firmware on the secure M-cores by the R5 SPL and therefore must be
updated to a different compatible to avoid conflicts.
Therefore, this patch renames all references of the compatible to
"ti,am654-tisci-rproc-r5". The "-r5" is appended so as to avoid any
future conflicts since r5 specific compatibles should only be useful for
U-Boot.
[1]: 5959618631fe ("dt-bindings: mfd: ti,j721e-system-controller: Add compatible string for AM654")
https://lore.kernel.org/r/20250421214620.3770172-2-afd@ti.com
Signed-off-by: Anshul Dalal <anshuld@ti.com>
55 lines
1.7 KiB
Plaintext
55 lines
1.7 KiB
Plaintext
Texas Instruments TI SCI Reset Controller
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=========================================
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Some TI SoCs contain a system controller (like the SYSFW, etc...) that is
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responsible for controlling the state of the IPs that are present.
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Communication between the host processor running an OS and the system
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controller happens through a protocol known as TI SCI [1].
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[1] http://processors.wiki.ti.com/index.php/TISCI
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Reset Controller Node
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=====================
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The reset controller node represents the resets of various hardware modules
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present on the SoC managed by the SYSFW. Because this relies on the TI SCI
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protocol to communicate with the SYSFW it must be a child of the sysfw node.
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Required Properties:
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--------------------
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- compatible: Must be "ti,sci-reset"
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- #reset-cells: Must be 2. Please see the reset consumer node below for
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usage details.
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Example (AM65x):
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----------------
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sysfw: sysfw {
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compatible = "ti,am654-tisci-rproc-r5";
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...
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k3_reset: reset-controller {
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compatible = "ti,sci-reset";
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#reset-cells = <2>;
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};
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};
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Reset Consumers
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===============
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Each of the reset consumer nodes should have the following properties,
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in addition to their own properties.
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Required Properties:
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--------------------
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- resets: A phandle and reset specifier pair, one pair for each reset signal
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that affects the device, or that the device manages. The phandle
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should point to the TI SCI reset controller node, and the reset
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specifier should have 2 cell-values. The first cell should contain
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the device ID. The second cell should contain the reset mask value
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used by system controller.
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Example (AM65x):
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----------------
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uart2: serial@02800000 {
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compatible = "ti,omap4-uart";
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...
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resets = <&k3_reset 5 1>;
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};
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