Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 136 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/bus/ti-sysc.txt b/Documentation/devicetree/bindings/bus/ti-sysc.txt
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+Texas Instruments sysc interconnect target module wrapper binding
+
+Texas Instruments SoCs can have a generic interconnect target module
+hardware for devices connected to various interconnects such as L3
+interconnect (Arteris NoC) and L4 interconnect (Sonics s3220). The sysc
+is mostly used for interaction between module and PRCM. It participates
+in the OCP Disconnect Protocol but other than that is mostly independent
+of the interconnect.
+
+Each interconnect target module can have one or more devices connected to
+it. There is a set of control registers for managing interconnect target
+module clocks, idle modes and interconnect level resets for the module.
+
+These control registers are sprinkled into the unused register address
+space of the first child device IP block managed by the interconnect
+target module and typically are named REVISION, SYSCONFIG and SYSSTATUS.
+
+Required standard properties:
+
+- compatible	shall be one of the following generic types:
+
+		"ti,sysc"
+		"ti,sysc-omap2"
+		"ti,sysc-omap4"
+		"ti,sysc-omap4-simple"
+
+		or one of the following derivative types for hardware
+		needing special workarounds:
+
+		"ti,sysc-omap2-timer"
+		"ti,sysc-omap4-timer"
+		"ti,sysc-omap3430-sr"
+		"ti,sysc-omap3630-sr"
+		"ti,sysc-omap4-sr"
+		"ti,sysc-omap3-sham"
+		"ti,sysc-omap-aes"
+		"ti,sysc-mcasp"
+		"ti,sysc-dra7-mcasp"
+		"ti,sysc-usb-host-fs"
+		"ti,sysc-dra7-mcan"
+
+- reg		shall have register areas implemented for the interconnect
+		target module in question such as revision, sysc and syss
+
+- reg-names	shall contain the register names implemented for the
+		interconnect target module in question such as
+		"rev, "sysc", and "syss"
+
+- ranges	shall contain the interconnect target module IO range
+		available for one or more child device IP blocks managed
+		by the interconnect target module, the ranges may include
+		multiple ranges such as device L4 range for control and
+		parent L3 range for DMA access
+
+Optional properties:
+
+- ti,sysc-mask	shall contain mask of supported register bits for the
+		SYSCONFIG register as documented in the Technical Reference
+		Manual (TRM) for the interconnect target module
+
+- ti,sysc-midle	list of master idle modes supported by the interconnect
+		target module as documented in the TRM for SYSCONFIG
+		register MIDLEMODE bits
+
+- ti,sysc-sidle	list of slave idle modes supported by the interconnect
+		target module as documented in the TRM for SYSCONFIG
+		register SIDLEMODE bits
+
+- ti,sysc-delay-us	delay needed after OCP softreset before accssing
+			SYSCONFIG register again
+
+- ti,syss-mask	optional mask of reset done status bits as described in the
+		TRM for SYSSTATUS registers, typically 1 with some devices
+		having separate reset done bits for children like OHCI and
+		EHCI
+
+- clocks	clock specifier for each name in the clock-names as
+		specified in the binding documentation for ti-clkctrl,
+		typically available for all interconnect targets on TI SoCs
+		based on omap4 except if it's read-only register in hwauto
+		mode as for example omap4 L4_CFG_CLKCTRL
+
+- clock-names	should contain at least "fck", and optionally also "ick"
+		depending on the SoC and the interconnect target module,
+		some interconnect target modules also need additional
+		optional clocks that can be specified as listed in TRM
+		for the related CLKCTRL register bits 8 to 15 such as
+		"dbclk" or "clk32k" depending on their role
+
+- ti,hwmods	optional TI interconnect module name to use legacy
+		hwmod platform data
+
+- ti,no-reset-on-init	interconnect target module should not be reset at init
+
+- ti,no-idle-on-init	interconnect target module should not be idled at init
+
+Example: Single instance of MUSB controller on omap4 using interconnect ranges
+using offsets from l4_cfg second segment (0x4a000000 + 0x80000 = 0x4a0ab000):
+
+	target-module@2b000 {		/* 0x4a0ab000, ap 84 12.0 */
+		compatible = "ti,sysc-omap2";
+		ti,hwmods = "usb_otg_hs";
+		reg = <0x2b400 0x4>,
+		      <0x2b404 0x4>,
+		      <0x2b408 0x4>;
+		reg-names = "rev", "sysc", "syss";
+		clocks = <&l3_init_clkctrl OMAP4_USB_OTG_HS_CLKCTRL 0>;
+		clock-names = "fck";
+		ti,sysc-mask = <(SYSC_OMAP2_ENAWAKEUP |
+				 SYSC_OMAP2_SOFTRESET |
+				 SYSC_OMAP2_AUTOIDLE)>;
+		ti,sysc-midle = <SYSC_IDLE_FORCE>,
+				<SYSC_IDLE_NO>,
+				<SYSC_IDLE_SMART>;
+		ti,sysc-sidle = <SYSC_IDLE_FORCE>,
+				<SYSC_IDLE_NO>,
+				<SYSC_IDLE_SMART>,
+				<SYSC_IDLE_SMART_WKUP>;
+		ti,syss-mask = <1>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x2b000 0x1000>;
+
+		usb_otg_hs: otg@0 {
+			compatible = "ti,omap4-musb";
+			reg = <0x0 0x7ff>;
+			interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>;
+			usb-phy = <&usb2_phy>;
+			...
+		};
+	};
+
+Note that other SoCs, such as am335x can have multipe child devices. On am335x
+there are two MUSB instances, two USB PHY instances, and a single CPPI41 DMA
+instance as children of a single interconnet target module.