| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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: |
| 13 | - "ti,omap34xx-bandgap" : for OMAP34xx bandgap |
| 14 | - "ti,omap36xx-bandgap" : for OMAP36xx bandgap |
| 15 | - "ti,omap4430-bandgap" : for OMAP4430 bandgap |
| 16 | - "ti,omap4460-bandgap" : for OMAP4460 bandgap |
| 17 | - "ti,omap4470-bandgap" : for OMAP4470 bandgap |
| 18 | - "ti,omap5430-bandgap" : for OMAP5430 bandgap |
| 19 | - interrupts : this entry should indicate which interrupt line |
| 20 | the talert signal is routed to; |
| 21 | Specific: |
| 22 | - gpios : this entry should be used to inform which GPIO |
| 23 | line the tshut signal is routed to. The informed GPIO will |
| 24 | be treated as an IRQ; |
| 25 | - regs : this entry must also be specified and it is specific |
| 26 | to each bandgap version, because the mapping may change from |
| 27 | soc to soc, apart of depending on available features. |
| 28 | |
| 29 | Example: |
| 30 | OMAP34xx: |
| 31 | bandgap { |
| 32 | reg = <0x48002524 0x4>; |
| 33 | compatible = "ti,omap34xx-bandgap"; |
| 34 | }; |
| 35 | |
| 36 | OMAP36xx: |
| 37 | bandgap { |
| 38 | reg = <0x48002524 0x4>; |
| 39 | compatible = "ti,omap36xx-bandgap"; |
| 40 | }; |
| 41 | |
| 42 | OMAP4430: |
| 43 | bandgap { |
| 44 | reg = <0x4a002260 0x4 0x4a00232C 0x4>; |
| 45 | compatible = "ti,omap4430-bandgap"; |
| 46 | }; |
| 47 | |
| 48 | OMAP4460: |
| 49 | bandgap { |
| 50 | reg = <0x4a002260 0x4 |
| 51 | 0x4a00232C 0x4 |
| 52 | 0x4a002378 0x18>; |
| 53 | compatible = "ti,omap4460-bandgap"; |
| 54 | interrupts = <0 126 4>; /* talert */ |
| 55 | gpios = <&gpio3 22 0>; /* tshut */ |
| 56 | }; |
| 57 | |
| 58 | OMAP4470: |
| 59 | bandgap { |
| 60 | reg = <0x4a002260 0x4 |
| 61 | 0x4a00232C 0x4 |
| 62 | 0x4a002378 0x18>; |
| 63 | compatible = "ti,omap4470-bandgap"; |
| 64 | interrupts = <0 126 4>; /* talert */ |
| 65 | gpios = <&gpio3 22 0>; /* tshut */ |
| 66 | }; |
| 67 | |
| 68 | OMAP5430: |
| 69 | bandgap { |
| 70 | reg = <0x4a0021e0 0xc |
| 71 | 0x4a00232c 0xc |
| 72 | 0x4a002380 0x2c |
| 73 | 0x4a0023C0 0x3c>; |
| 74 | compatible = "ti,omap5430-bandgap"; |
| 75 | interrupts = <0 126 4>; /* talert */ |
| 76 | }; |
| 77 | |
| 78 | DRA752: |
| 79 | bandgap { |
| 80 | reg = <0x4a0021e0 0xc |
| 81 | 0x4a00232c 0xc |
| 82 | 0x4a002380 0x2c |
| 83 | 0x4a0023C0 0x3c |
| 84 | 0x4a002564 0x8 |
| 85 | 0x4a002574 0x50>; |
| 86 | compatible = "ti,dra752-bandgap"; |
| 87 | interrupts = <0 126 4>; /* talert */ |
| 88 | }; |