diff options
Diffstat (limited to 'roms/u-boot/doc/device-tree-bindings/power')
| -rw-r--r-- | roms/u-boot/doc/device-tree-bindings/power/ti,sci-pm-domain.txt | 59 | ||||
| -rw-r--r-- | roms/u-boot/doc/device-tree-bindings/power/tps65090.txt | 17 |
2 files changed, 76 insertions, 0 deletions
diff --git a/roms/u-boot/doc/device-tree-bindings/power/ti,sci-pm-domain.txt b/roms/u-boot/doc/device-tree-bindings/power/ti,sci-pm-domain.txt new file mode 100644 index 000000000..72d9fbc83 --- /dev/null +++ b/roms/u-boot/doc/device-tree-bindings/power/ti,sci-pm-domain.txt @@ -0,0 +1,59 @@ +Texas Instruments TI SCI Generic Power Domain +============================================= + +Some TI SoCs contain a system controller (like the SYSFW, etc...) that is +responsible for controlling the state of the IPs that are present. +Communication between the host processor running an OS and the system +controller happens through a protocol known as TI SCI [1]. + +[1] http://processors.wiki.ti.com/index.php/TISCI + +PM Domain Node +============== +The PM domain node represents the global PM domain managed by the SYSFW. Because +this relies on the TI SCI protocol to communicate with the SYSFW it must be a +child of the sysfw node. + +Required Properties: +-------------------- +- compatible: Must be "ti,sci-pm-domain" +- #power-domain-cells: Can be one of the following: + 1: Containing the device id of each node + 2: First entry should be device id + Second entry should be one of the floowing: + TI_SCI_PD_EXCLUSIVE: To allow device to be + exclusively controlled by + the requesting hosts. + TI_SCI_PD_SHARED: To allow device to be shared + by multiple hosts. + +Example (AM65x): +---------------- + sysfw: sysfw { + compatible = "ti,am654-system-controller"; + ... + k3_pds: power-controller { + compatible = "ti,sci-pm-domain"; + #power-domain-cells = <1>; + }; + }; + +PM Domain Consumers +=================== +Hardware blocks belonging to a PM domain should contain a "power-domains" +property that is a phandle pointing to the corresponding PM domain node +along with an index representing the device id to be passed to the PMMC +for device control. + +Required Properties: +-------------------- +- power-domains: phandle pointing to the corresponding PM domain node + and an ID representing the device. + +Example (AM65x): +---------------- + uart2: serial@02800000 { + compatible = "ti,omap4-uart"; + ... + power-domains = <&k3_pds 0x3f>; + }; diff --git a/roms/u-boot/doc/device-tree-bindings/power/tps65090.txt b/roms/u-boot/doc/device-tree-bindings/power/tps65090.txt new file mode 100644 index 000000000..8e5e0d391 --- /dev/null +++ b/roms/u-boot/doc/device-tree-bindings/power/tps65090.txt @@ -0,0 +1,17 @@ +TPS65090 Frontend PMU with Switchmode Charger + +Required Properties: +-compatible: "ti,tps65090-charger" + +Optional Properties: +-ti,enable-low-current-chrg: Enables charging when a low current is detected + while the default logic is to stop charging. + +This node is a subnode of the tps65090 PMIC. + +Example: + + tps65090-charger { + compatible = "ti,tps65090-charger"; + ti,enable-low-current-chrg; + }; |