1Texas Instruments System Control Interface (TI-SCI) Reset Controller 2===================================================================== 3 4Some TI SoCs contain a system controller (like the Power Management Micro 5Controller (PMMC) on Keystone 66AK2G SoC) that are responsible for controlling 6the state of the various hardware modules present on the SoC. Communication 7between the host processor running an OS and the system controller happens 8through a protocol called TI System Control Interface (TI-SCI protocol). 9For TI SCI details, please refer to the document, 10Documentation/devicetree/bindings/arm/keystone/ti,sci.txt 11 12TI-SCI Reset Controller Node 13============================ 14This reset controller node uses the TI SCI protocol to perform the reset 15management of various hardware modules present on the SoC. Must be a child 16node of the associated TI-SCI system controller node. 17 18Required properties: 19-------------------- 20 - compatible : Should be "ti,sci-reset" 21 - #reset-cells : Should be 2. Please see the reset consumer node below for 22 usage details. 23 24TI-SCI Reset Consumer Nodes 25=========================== 26Each of the reset consumer nodes should have the following properties, 27in addition to their own properties. 28 29Required properties: 30-------------------- 31 - resets : A phandle and reset specifier pair, one pair for each reset 32 signal that affects the device, or that the device manages. 33 The phandle should point to the TI-SCI reset controller node, 34 and the reset specifier should have 2 cell-values. The first 35 cell should contain the device ID. The second cell should 36 contain the reset mask value used by system controller. 37 Please refer to the protocol documentation for these values 38 to be used for different devices, 39 http://processors.wiki.ti.com/index.php/TISCI#66AK2G02_Data 40 41Please also refer to Documentation/devicetree/bindings/reset/reset.txt for 42common reset controller usage by consumers. 43 44Example: 45-------- 46The following example demonstrates both a TI-SCI reset controller node and a 47consumer (a DSP device) on the 66AK2G SoC. 48 49pmmc: pmmc { 50 compatible = "ti,k2g-sci"; 51 52 k2g_reset: reset-controller { 53 compatible = "ti,sci-reset"; 54 #reset-cells = <2>; 55 }; 56}; 57 58dsp0: dsp@10800000 { 59 ... 60 resets = <&k2g_reset 0x0046 0x1>; 61 ... 62}; 63