1 Texas Instruments sysc interconnect target module wrapper binding
3 Texas Instruments SoCs can have a generic interconnect target module
4 hardware for devices connected to various interconnects such as L3
5 interconnect (Arteris NoC) and L4 interconnect (Sonics s3220). The sysc
6 is mostly used for interaction between module and PRCM. It participates
7 in the OCP Disconnect Protocol but other than that is mostly independent
10 Each interconnect target module can have one or more devices connected to
11 it. There is a set of control registers for managing interconnect target
12 module clocks, idle modes and interconnect level resets for the module.
14 These control registers are sprinkled into the unused register address
15 space of the first child device IP block managed by the interconnect
16 target module and typically are named REVISION, SYSCONFIG and SYSSTATUS.
18 Required standard properties:
20 - compatible shall be one of the following generic types:
25 "ti,sysc-omap4-simple"
27 or one of the following derivative types for hardware
28 needing special workarounds:
40 - reg shall have register areas implemented for the interconnect
41 target module in question such as revision, sysc and syss
43 - reg-names shall contain the register names implemented for the
44 interconnect target module in question such as
45 "rev, "sysc", and "syss"
47 - ranges shall contain the interconnect target module IO range
48 available for one or more child device IP blocks managed
49 by the interconnect target module, the ranges may include
50 multiple ranges such as device L4 range for control and
51 parent L3 range for DMA access
55 - ti,sysc-mask shall contain mask of supported register bits for the
56 SYSCONFIG register as documented in the Technical Reference
57 Manual (TRM) for the interconnect target module
59 - ti,sysc-midle list of master idle modes supported by the interconnect
60 target module as documented in the TRM for SYSCONFIG
61 register MIDLEMODE bits
63 - ti,sysc-sidle list of slave idle modes supported by the interconnect
64 target module as documented in the TRM for SYSCONFIG
65 register SIDLEMODE bits
67 - ti,sysc-delay-us delay needed after OCP softreset before accssing
68 SYSCONFIG register again
70 - ti,syss-mask optional mask of reset done status bits as described in the
71 TRM for SYSSTATUS registers, typically 1 with some devices
72 having separate reset done bits for children like OHCI and
75 - clocks clock specifier for each name in the clock-names as
76 specified in the binding documentation for ti-clkctrl,
77 typically available for all interconnect targets on TI SoCs
78 based on omap4 except if it's read-only register in hwauto
79 mode as for example omap4 L4_CFG_CLKCTRL
81 - clock-names should contain at least "fck", and optionally also "ick"
82 depending on the SoC and the interconnect target module
84 - ti,hwmods optional TI interconnect module name to use legacy
87 - ti,no-reset-on-init interconnect target module should not be reset at init
89 - ti,no-idle-on-init interconnect target module should not be idled at init
91 Example: Single instance of MUSB controller on omap4 using interconnect ranges
92 using offsets from l4_cfg second segment (0x4a000000 + 0x80000 = 0x4a0ab000):
94 target-module@2b000 { /* 0x4a0ab000, ap 84 12.0 */
95 compatible = "ti,sysc-omap2";
96 ti,hwmods = "usb_otg_hs";
100 reg-names = "rev", "sysc", "syss";
101 clocks = <&l3_init_clkctrl OMAP4_USB_OTG_HS_CLKCTRL 0>;
103 ti,sysc-mask = <(SYSC_OMAP2_ENAWAKEUP |
104 SYSC_OMAP2_SOFTRESET |
105 SYSC_OMAP2_AUTOIDLE)>;
106 ti,sysc-midle = <SYSC_IDLE_FORCE>,
109 ti,sysc-sidle = <SYSC_IDLE_FORCE>,
112 <SYSC_IDLE_SMART_WKUP>;
114 #address-cells = <1>;
116 ranges = <0 0x2b000 0x1000>;
119 compatible = "ti,omap4-musb";
121 interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>,
122 <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>;
123 usb-phy = <&usb2_phy>;
128 Note that other SoCs, such as am335x can have multipe child devices. On am335x
129 there are two MUSB instances, two USB PHY instances, and a single CPPI41 DMA
130 instance as children of a single interconnet target module.