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:
43 - reg shall have register areas implemented for the interconnect
44 target module in question such as revision, sysc and syss
46 - reg-names shall contain the register names implemented for the
47 interconnect target module in question such as
48 "rev, "sysc", and "syss"
50 - ranges shall contain the interconnect target module IO range
51 available for one or more child device IP blocks managed
52 by the interconnect target module, the ranges may include
53 multiple ranges such as device L4 range for control and
54 parent L3 range for DMA access
58 - ti,sysc-mask shall contain mask of supported register bits for the
59 SYSCONFIG register as documented in the Technical Reference
60 Manual (TRM) for the interconnect target module
62 - ti,sysc-midle list of master idle modes supported by the interconnect
63 target module as documented in the TRM for SYSCONFIG
64 register MIDLEMODE bits
66 - ti,sysc-sidle list of slave idle modes supported by the interconnect
67 target module as documented in the TRM for SYSCONFIG
68 register SIDLEMODE bits
70 - ti,sysc-delay-us delay needed after OCP softreset before accssing
71 SYSCONFIG register again
73 - ti,syss-mask optional mask of reset done status bits as described in the
74 TRM for SYSSTATUS registers, typically 1 with some devices
75 having separate reset done bits for children like OHCI and
78 - clocks clock specifier for each name in the clock-names as
79 specified in the binding documentation for ti-clkctrl,
80 typically available for all interconnect targets on TI SoCs
81 based on omap4 except if it's read-only register in hwauto
82 mode as for example omap4 L4_CFG_CLKCTRL
84 - clock-names should contain at least "fck", and optionally also "ick"
85 depending on the SoC and the interconnect target module,
86 some interconnect target modules also need additional
87 optional clocks that can be specified as listed in TRM
88 for the related CLKCTRL register bits 8 to 15 such as
89 "dbclk" or "clk32k" depending on their role
91 - ti,hwmods optional TI interconnect module name to use legacy
94 - ti,no-reset-on-init interconnect target module should not be reset at init
96 - ti,no-idle-on-init interconnect target module should not be idled at init
98 - ti,no-idle interconnect target module should not be idled
100 Example: Single instance of MUSB controller on omap4 using interconnect ranges
101 using offsets from l4_cfg second segment (0x4a000000 + 0x80000 = 0x4a0ab000):
103 target-module@2b000 { /* 0x4a0ab000, ap 84 12.0 */
104 compatible = "ti,sysc-omap2";
105 ti,hwmods = "usb_otg_hs";
109 reg-names = "rev", "sysc", "syss";
110 clocks = <&l3_init_clkctrl OMAP4_USB_OTG_HS_CLKCTRL 0>;
112 ti,sysc-mask = <(SYSC_OMAP2_ENAWAKEUP |
113 SYSC_OMAP2_SOFTRESET |
114 SYSC_OMAP2_AUTOIDLE)>;
115 ti,sysc-midle = <SYSC_IDLE_FORCE>,
118 ti,sysc-sidle = <SYSC_IDLE_FORCE>,
121 <SYSC_IDLE_SMART_WKUP>;
123 #address-cells = <1>;
125 ranges = <0 0x2b000 0x1000>;
128 compatible = "ti,omap4-musb";
130 interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>,
131 <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>;
132 usb-phy = <&usb2_phy>;
137 Note that other SoCs, such as am335x can have multiple child devices. On am335x
138 there are two MUSB instances, two USB PHY instances, and a single CPPI41 DMA
139 instance as children of a single interconnect target module.