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Merge branch 'clk-shmobile-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into clk-next
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254f9463c5
69
Documentation/devicetree/bindings/clock/renesas,cpg-mssr.txt
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Documentation/devicetree/bindings/clock/renesas,cpg-mssr.txt
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* Renesas Clock Pulse Generator / Module Standby and Software Reset
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On Renesas ARM SoCs (SH/R-Mobile, R-Car, RZ), the CPG (Clock Pulse Generator)
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and MSSR (Module Standby and Software Reset) blocks are intimately connected,
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and share the same register block.
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They provide the following functionalities:
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- The CPG block generates various core clocks,
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- The MSSR block provides two functions:
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1. Module Standby, providing a Clock Domain to control the clock supply
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to individual SoC devices,
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2. Reset Control, to perform a software reset of individual SoC devices.
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Required Properties:
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- compatible: Must be one of:
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- "renesas,r8a7795-cpg-mssr" for the r8a7795 SoC
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- reg: Base address and length of the memory resource used by the CPG/MSSR
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block
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- clocks: References to external parent clocks, one entry for each entry in
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clock-names
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- clock-names: List of external parent clock names. Valid names are:
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- "extal" (r8a7795)
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- "extalr" (r8a7795)
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- #clock-cells: Must be 2
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- For CPG core clocks, the two clock specifier cells must be "CPG_CORE"
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and a core clock reference, as defined in
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<dt-bindings/clock/*-cpg-mssr.h>.
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- For module clocks, the two clock specifier cells must be "CPG_MOD" and
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a module number, as defined in the datasheet.
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- #power-domain-cells: Must be 0
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- SoC devices that are part of the CPG/MSSR Clock Domain and can be
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power-managed through Module Standby should refer to the CPG device
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node in their "power-domains" property, as documented by the generic PM
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Domain bindings in
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Documentation/devicetree/bindings/power/power_domain.txt.
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Examples
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--------
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- CPG device node:
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cpg: clock-controller@e6150000 {
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compatible = "renesas,r8a7795-cpg-mssr";
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reg = <0 0xe6150000 0 0x1000>;
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clocks = <&extal_clk>, <&extalr_clk>;
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clock-names = "extal", "extalr";
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#clock-cells = <2>;
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#power-domain-cells = <0>;
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};
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- CPG/MSSR Clock Domain member device node:
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scif2: serial@e6e88000 {
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compatible = "renesas,scif-r8a7795", "renesas,scif";
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reg = <0 0xe6e88000 0 64>;
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interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&cpg CPG_MOD 310>;
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clock-names = "sci_ick";
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dmas = <&dmac1 0x13>, <&dmac1 0x12>;
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dma-names = "tx", "rx";
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power-domains = <&cpg>;
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status = "disabled";
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};
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include/dt-bindings/clock/r8a7795-cpg-mssr.h
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include/dt-bindings/clock/r8a7795-cpg-mssr.h
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/*
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* Copyright (C) 2015 Renesas Electronics Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __DT_BINDINGS_CLOCK_R8A7795_CPG_MSSR_H__
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#define __DT_BINDINGS_CLOCK_R8A7795_CPG_MSSR_H__
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#include <dt-bindings/clock/renesas-cpg-mssr.h>
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/* r8a7795 CPG Core Clocks */
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#define R8A7795_CLK_Z 0
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#define R8A7795_CLK_Z2 1
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#define R8A7795_CLK_ZR 2
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#define R8A7795_CLK_ZG 3
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#define R8A7795_CLK_ZTR 4
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#define R8A7795_CLK_ZTRD2 5
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#define R8A7795_CLK_ZT 6
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#define R8A7795_CLK_ZX 7
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#define R8A7795_CLK_S0D1 8
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#define R8A7795_CLK_S0D4 9
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#define R8A7795_CLK_S1D1 10
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#define R8A7795_CLK_S1D2 11
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#define R8A7795_CLK_S1D4 12
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#define R8A7795_CLK_S2D1 13
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#define R8A7795_CLK_S2D2 14
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#define R8A7795_CLK_S2D4 15
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#define R8A7795_CLK_S3D1 16
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#define R8A7795_CLK_S3D2 17
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#define R8A7795_CLK_S3D4 18
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#define R8A7795_CLK_LB 19
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#define R8A7795_CLK_CL 20
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#define R8A7795_CLK_ZB3 21
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#define R8A7795_CLK_ZB3D2 22
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#define R8A7795_CLK_CR 23
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#define R8A7795_CLK_CRD2 24
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#define R8A7795_CLK_SD0H 25
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#define R8A7795_CLK_SD0 26
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#define R8A7795_CLK_SD1H 27
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#define R8A7795_CLK_SD1 28
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#define R8A7795_CLK_SD2H 29
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#define R8A7795_CLK_SD2 30
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#define R8A7795_CLK_SD3H 31
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#define R8A7795_CLK_SD3 32
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#define R8A7795_CLK_SSP2 33
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#define R8A7795_CLK_SSP1 34
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#define R8A7795_CLK_SSPRS 35
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#define R8A7795_CLK_RPC 36
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#define R8A7795_CLK_RPCD2 37
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#define R8A7795_CLK_MSO 38
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#define R8A7795_CLK_CANFD 39
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#define R8A7795_CLK_HDMI 40
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#define R8A7795_CLK_CSI0 41
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#define R8A7795_CLK_CSIREF 42
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#define R8A7795_CLK_CP 43
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#define R8A7795_CLK_CPEX 44
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#define R8A7795_CLK_R 45
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#define R8A7795_CLK_OSC 46
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#endif /* __DT_BINDINGS_CLOCK_R8A7795_CPG_MSSR_H__ */
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15
include/dt-bindings/clock/renesas-cpg-mssr.h
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include/dt-bindings/clock/renesas-cpg-mssr.h
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/*
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* Copyright (C) 2015 Renesas Electronics Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __DT_BINDINGS_CLOCK_RENESAS_CPG_MSSR_H__
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#define __DT_BINDINGS_CLOCK_RENESAS_CPG_MSSR_H__
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#define CPG_CORE 0 /* Core Clock */
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#define CPG_MOD 1 /* Module Clock */
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#endif /* __DT_BINDINGS_CLOCK_RENESAS_CPG_MSSR_H__ */
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