projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 8feaf0ce EV |
1 | * Texas Instrument OMAP SCM bandgap bindings |
| 2 | ||
| 3 | In the System Control Module, OMAP supplies a voltage reference | |
| 4 | and a temperature sensor feature that are gathered in the band | |
| 5 | gap voltage and temperature sensor (VBGAPTS) module. The band | |
| 6 | gap provides current and voltage reference for its internal | |
| 7 | circuits and other analog IP blocks. The analog-to-digital | |
| 8 | converter (ADC) produces an output value that is proportional | |
| 9 | to the silicon temperature. | |
| 10 | ||
| 11 | Required properties: | |
| 12 | - compatible : Should be: | |
| 18da6351 EV |
13 | - "ti,omap4430-bandgap" : for OMAP4430 bandgap |
| 14 | - "ti,omap4460-bandgap" : for OMAP4460 bandgap | |
| 15 | - "ti,omap4470-bandgap" : for OMAP4470 bandgap | |
| 16 | - "ti,omap5430-bandgap" : for OMAP5430 bandgap | |
| 8feaf0ce EV |
17 | - interrupts : this entry should indicate which interrupt line |
| 18 | the talert signal is routed to; | |
| 19 | Specific: | |
| 57d16171 EV |
20 | - gpios : this entry should be used to inform which GPIO |
| 21 | line the tshut signal is routed to. The informed GPIO will | |
| 22 | be treated as an IRQ; | |
| 18da6351 EV |
23 | - regs : this entry must also be specified and it is specific |
| 24 | to each bandgap version, because the mapping may change from | |
| 25 | soc to soc, apart of depending on available features. | |
| 8feaf0ce EV |
26 | |
| 27 | Example: | |
| 18da6351 EV |
28 | OMAP4430: |
| 29 | bandgap { | |
| 30 | reg = <0x4a002260 0x4 0x4a00232C 0x4>; | |
| 31 | compatible = "ti,omap4430-bandgap"; | |
| 32 | }; | |
| 33 | ||
| 34 | OMAP4460: | |
| 35 | bandgap { | |
| 36 | reg = <0x4a002260 0x4 | |
| 37 | 0x4a00232C 0x4 | |
| 38 | 0x4a002378 0x18>; | |
| 39 | compatible = "ti,omap4460-bandgap"; | |
| 40 | interrupts = <0 126 4>; /* talert */ | |
| 57d16171 | 41 | gpios = <&gpio3 22 0>; /* tshut */ |
| 18da6351 | 42 | }; |
| 8feaf0ce | 43 | |
| 18da6351 | 44 | OMAP4470: |
| 8feaf0ce EV |
45 | bandgap { |
| 46 | reg = <0x4a002260 0x4 | |
| 47 | 0x4a00232C 0x4 | |
| 48 | 0x4a002378 0x18>; | |
| 18da6351 | 49 | compatible = "ti,omap4470-bandgap"; |
| 8feaf0ce | 50 | interrupts = <0 126 4>; /* talert */ |
| 57d16171 | 51 | gpios = <&gpio3 22 0>; /* tshut */ |
| 8feaf0ce | 52 | }; |
| efba1194 EV |
53 | |
| 54 | OMAP5430: | |
| 55 | bandgap { | |
| 56 | reg = <0x4a0021e0 0xc | |
| 57 | 0x4a00232c 0xc | |
| 58 | 0x4a002380 0x2c | |
| 59 | 0x4a0023C0 0x3c>; | |
| 60 | compatible = "ti,omap5430-bandgap"; | |
| 0c156959 | 61 | interrupts = <0 126 4>; /* talert */ |
| efba1194 | 62 | }; |
| ca0c7114 EV |
63 | |
| 64 | DRA752: | |
| 65 | bandgap { | |
| 66 | reg = <0x4a0021e0 0xc | |
| 67 | 0x4a00232c 0xc | |
| 68 | 0x4a002380 0x2c | |
| 69 | 0x4a0023C0 0x3c | |
| 70 | 0x4a002564 0x8 | |
| 71 | 0x4a002574 0x50>; | |
| 72 | compatible = "ti,dra752-bandgap"; | |
| 73 | interrupts = <0 126 4>; /* talert */ | |
| 74 | }; |