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129 files changed, 7174 insertions, 785 deletions
diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt new file mode 100644 index 000000000000..46d0af1f0872 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt @@ -0,0 +1,183 @@ +NXP i.MX System Controller Firmware (SCFW) +-------------------------------------------------------------------- + +The System Controller Firmware (SCFW) is a low-level system function +which runs on a dedicated Cortex-M core to provide power, clock, and +resource management. It exists on some i.MX8 processors. e.g. i.MX8QM +(QM, QP), and i.MX8QX (QXP, DX). + +The AP communicates with the SC using a multi-ported MU module found +in the LSIO subsystem. The current definition of this MU module provides +5 remote AP connections to the SC to support up to 5 execution environments +(TZ, HV, standard Linux, etc.). The SC side of this MU module interfaces +with the LSIO DSC IP bus. The SC firmware will communicate with this MU +using the MSI bus. + +System Controller Device Node: +============================================================ + +The scu node with the following properties shall be under the /firmware/ node. + +Required properties: +------------------- +- compatible: should be "fsl,imx-scu". +- mbox-names: should include "tx0", "tx1", "tx2", "tx3", + "rx0", "rx1", "rx2", "rx3". +- mboxes: List of phandle of 4 MU channels for tx and 4 MU channels + for rx. All 8 MU channels must be in the same MU instance. + Cross instances are not allowed. The MU instance can only + be one of LSIO MU0~M4 for imx8qxp and imx8qm. Users need + to make sure use the one which is not conflict with other + execution environments. e.g. ATF. + Note: + Channel 0 must be "tx0" or "rx0". + Channel 1 must be "tx1" or "rx1". + Channel 2 must be "tx2" or "rx2". + Channel 3 must be "tx3" or "rx3". + e.g. + mboxes = <&lsio_mu1 0 0 + &lsio_mu1 0 1 + &lsio_mu1 0 2 + &lsio_mu1 0 3 + &lsio_mu1 1 0 + &lsio_mu1 1 1 + &lsio_mu1 1 2 + &lsio_mu1 1 3>; + See Documentation/devicetree/bindings/mailbox/fsl,mu.txt + for detailed mailbox binding. + +i.MX SCU Client Device Node: +============================================================ + +Client nodes are maintained as children of the relevant IMX-SCU device node. + +Power domain bindings based on SCU Message Protocol +------------------------------------------------------------ + +This binding for the SCU power domain providers uses the generic power +domain binding[2]. + +Required properties: +- compatible: Should be "fsl,scu-pd". +- #address-cells: Should be 1. +- #size-cells: Should be 0. + +Required properties for power domain sub nodes: +- #power-domain-cells: Must be 0. + +Optional Properties: +- reg: Resource ID of this power domain. + No exist means uncontrollable by user. + See detailed Resource ID list from: + include/dt-bindings/power/imx-rsrc.h +- power-domains: phandle pointing to the parent power domain. + +Clock bindings based on SCU Message Protocol +------------------------------------------------------------ + +This binding uses the common clock binding[1]. + +Required properties: +- compatible: Should be "fsl,imx8qxp-clock". +- #clock-cells: Should be 1. Contains the Clock ID value. +- clocks: List of clock specifiers, must contain an entry for + each required entry in clock-names +- clock-names: Should include entries "xtal_32KHz", "xtal_24MHz" + +The clock consumer should specify the desired clock by having the clock +ID in its "clocks" phandle cell. + +See the full list of clock IDs from: +include/dt-bindings/clock/imx8qxp-clock.h + +Pinctrl bindings based on SCU Message Protocol +------------------------------------------------------------ + +This binding uses the i.MX common pinctrl binding[3]. + +Required properties: +- compatible: Should be "fsl,imx8qxp-iomuxc". + +Required properties for Pinctrl sub nodes: +- fsl,pins: Each entry consists of 3 integers which represents + the mux and config setting for one pin. The first 2 + integers <pin_id mux_mode> are specified using a |