6f18ce8026
Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").
Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>
61 lines
1.3 KiB
Plaintext
61 lines
1.3 KiB
Plaintext
* Generic Mailbox Controller and client driver bindings
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Generic binding to provide a way for Mailbox controller drivers to
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assign appropriate mailbox channel to client drivers.
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* Mailbox Controller
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Required property:
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- #mbox-cells: Must be at least 1. Number of cells in a mailbox
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specifier.
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Example:
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mailbox: mailbox {
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...
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#mbox-cells = <1>;
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};
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* Mailbox Client
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Required property:
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- mboxes: List of phandle and mailbox channel specifiers.
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Optional property:
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- mbox-names: List of identifier strings for each mailbox channel.
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- shmem : List of phandle pointing to the shared memory(SHM) area between the
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users of these mailboxes for IPC, one for each mailbox. This shared
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memory can be part of any memory reserved for the purpose of this
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communication between the mailbox client and the remote.
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Example:
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pwr_cntrl: power {
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...
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mbox-names = "pwr-ctrl", "rpc";
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mboxes = <&mailbox 0 &mailbox 1>;
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};
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Example with shared memory(shmem):
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sram: sram@50000000 {
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compatible = "mmio-sram";
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reg = <0x50000000 0x10000>;
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#address-cells = <1>;
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#size-cells = <1>;
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ranges = <0 0x50000000 0x10000>;
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cl_shmem: shmem@0 {
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compatible = "client-shmem";
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reg = <0x0 0x200>;
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};
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};
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client@2e000000 {
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...
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mboxes = <&mailbox 0>;
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shmem = <&cl_shmem>;
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..
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};
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