projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 10f5b148 NKC |
1 | Samsung Exynos Analog to Digital Converter bindings |
| 2 | ||
| df4b404b | 3 | The devicetree bindings are for the new ADC driver written for |
| 10f5b148 NKC |
4 | Exynos4 and upward SoCs from Samsung. |
| 5 | ||
| 6 | New driver handles the following | |
| 7 | 1. Supports ADC IF found on EXYNOS4412/EXYNOS5250 | |
| 8 | and future SoCs from Samsung | |
| 9 | 2. Add ADC driver under iio/adc framework | |
| 10 | 3. Also adds the Documentation for device tree bindings | |
| 11 | ||
| 12 | Required properties: | |
| 13 | - compatible: Must be "samsung,exynos-adc-v1" | |
| 14 | for exynos4412/5250 controllers. | |
| 15 | Must be "samsung,exynos-adc-v2" for | |
| 16 | future controllers. | |
| 17 | - reg: Contains ADC register address range (base address and | |
| bb916ebb | 18 | length) and the address of the phy enable register. |
| 10f5b148 NKC |
19 | - interrupts: Contains the interrupt information for the timer. The |
| 20 | format is being dependent on which interrupt controller | |
| 21 | the Samsung device uses. | |
| 22 | - #io-channel-cells = <1>; As ADC has multiple outputs | |
| 2b684024 DA |
23 | - clocks From common clock binding: handle to adc clock. |
| 24 | - clock-names From common clock binding: Shall be "adc". | |
| 25 | - vdd-supply VDD input supply. | |
| 10f5b148 NKC |
26 | |
| 27 | Note: child nodes can be added for auto probing from device tree. | |
| 28 | ||
| 29 | Example: adding device info in dtsi file | |
| 30 | ||
| 31 | adc: adc@12D10000 { | |
| 32 | compatible = "samsung,exynos-adc-v1"; | |
| bb916ebb | 33 | reg = <0x12D10000 0x100>, <0x10040718 0x4>; |
| 10f5b148 NKC |
34 | interrupts = <0 106 0>; |
| 35 | #io-channel-cells = <1>; | |
| 36 | io-channel-ranges; | |
| 2b684024 DA |
37 | |
| 38 | clocks = <&clock 303>; | |
| 39 | clock-names = "adc"; | |
| 40 | ||
| 41 | vdd-supply = <&buck5_reg>; | |
| 10f5b148 NKC |
42 | }; |
| 43 | ||
| 44 | ||
| 45 | Example: Adding child nodes in dts file | |
| 46 | ||
| 47 | adc@12D10000 { | |
| 48 | ||
| 49 | /* NTC thermistor is a hwmon device */ | |
| 50 | ncp15wb473@0 { | |
| 8b6f5e0f | 51 | compatible = "murata,ncp15wb473"; |
| 1675088f | 52 | pullup-uv = <1800000>; |
| 10f5b148 NKC |
53 | pullup-ohm = <47000>; |
| 54 | pulldown-ohm = <0>; | |
| 55 | io-channels = <&adc 4>; | |
| 56 | }; | |
| 57 | }; | |
| 58 | ||
| 59 | Note: Does not apply to ADC driver under arch/arm/plat-samsung/ | |
| df4b404b | 60 | Note: The child node can be added under the adc node or separately. |