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d16645054d
Commit 7cc119f29b ("dt-bindings: Add TI SCI PM Domains") introduced a
number of K2G_DEV_x macros to represent each device ID available on the
K2G platform for use by the genpd, clock, and reset drivers. Rather than
use these macros, which are only used in the device tree for property
values and not actually used by the drivers, let's just use the device
ID number directly in the device tree to avoid macro bloat.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
59 lines
1.8 KiB
Plaintext
59 lines
1.8 KiB
Plaintext
Texas Instruments TI-SCI Generic Power Domain
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---------------------------------------------
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Some TI SoCs contain a system controller (like the PMMC, 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] Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
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PM Domain Node
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==============
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The PM domain node represents the global PM domain managed by the PMMC, which
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in this case is the implementation as documented by the generic PM domain
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bindings in Documentation/devicetree/bindings/power/power_domain.txt. Because
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this relies on the TI SCI protocol to communicate with the PMMC it must be a
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child of the pmmc node.
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Required Properties:
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--------------------
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- compatible: should be "ti,sci-pm-domain"
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- #power-domain-cells: Must be 1 so that an id can be provided in each
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device node.
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Example (K2G):
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-------------
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pmmc: pmmc {
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compatible = "ti,k2g-sci";
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...
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k2g_pds: power-controller {
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compatible = "ti,sci-pm-domain";
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#power-domain-cells = <1>;
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};
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};
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PM Domain Consumers
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===================
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Hardware blocks belonging to a PM domain should contain a "power-domains"
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property that is a phandle pointing to the corresponding PM domain node
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along with an index representing the device id to be passed to the PMMC
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for device control.
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Required Properties:
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--------------------
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- power-domains: phandle pointing to the corresponding PM domain node
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and an ID representing the device.
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See http://processors.wiki.ti.com/index.php/TISCI#66AK2G02_Data for the list
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of valid identifiers for k2g.
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Example (K2G):
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--------------------
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uart0: serial@02530c00 {
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compatible = "ns16550a";
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...
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power-domains = <&k2g_pds 0x002c>;
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};
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