| Sam Protsenko | ba3b14a | 2024-01-10 21:08:58 -0600 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/soc/samsung/exynos-pmu.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Samsung Exynos SoC series Power Management Unit (PMU) |
| 8 | |
| 9 | maintainers: |
| 10 | - Sam Protsenko <semen.protsenko@linaro.org> |
| 11 | |
| 12 | description: |+ |
| 13 | PMU block controls the power and operation states of Exynos SoC. It contains |
| 14 | registers for changing the state of next features:: |
| 15 | |
| 16 | - Local power control. Exynos SoCs have various power domains, and it's |
| 17 | possible to turn them on and off independently, using corresponding |
| 18 | registers in PMU block |
| 19 | - System-level power control. That allows putting the system into power-down |
| 20 | modes (sleep) by turning off the power for most of the domains |
| 21 | - Miscellaneous PMU related features |
| 22 | |
| 23 | # Custom select to avoid matching all nodes with 'syscon' |
| 24 | select: |
| 25 | properties: |
| 26 | compatible: |
| 27 | contains: |
| 28 | enum: |
| 29 | - samsung,exynos850-pmu |
| 30 | required: |
| 31 | - compatible |
| 32 | |
| 33 | properties: |
| 34 | compatible: |
| 35 | oneOf: |
| 36 | - items: |
| 37 | - enum: |
| 38 | - samsung,exynos850-pmu |
| 39 | - const: syscon |
| 40 | |
| 41 | reg: |
| 42 | maxItems: 1 |
| 43 | |
| 44 | samsung,uart-debug-1: |
| 45 | type: boolean |
| 46 | description: |
| 47 | Enable this property if AP UART lines (Application Processor UART) must be |
| 48 | connected to UART_DEBUG_1 path in PMU block. That's usually needed when |
| 49 | the serial console is provided by uart1_pins. If this property is not |
| 50 | specified, the default behavior will be used (AP UART lines connected to |
| 51 | UART_DEBUG_0 path, which usually means uart0_pins are used for the serial |
| 52 | console). |
| 53 | |
| 54 | syscon-poweroff: |
| 55 | $ref: /schemas/power/reset/syscon-poweroff.yaml# |
| 56 | type: object |
| 57 | description: |
| 58 | Node for power off method |
| 59 | |
| 60 | syscon-reboot: |
| 61 | $ref: /schemas/power/reset/syscon-reboot.yaml# |
| 62 | type: object |
| 63 | description: |
| 64 | Node for reboot method |
| 65 | |
| 66 | required: |
| 67 | - compatible |
| 68 | - reg |
| 69 | |
| 70 | additionalProperties: false |
| 71 | |
| 72 | examples: |
| 73 | - | |
| 74 | pmu_system_controller: system-controller@11860000 { |
| 75 | compatible = "samsung,exynos850-pmu", "syscon"; |
| 76 | reg = <0x11860000 0x10000>; |
| 77 | |
| 78 | reboot: syscon-reboot { |
| 79 | compatible = "syscon-reboot"; |
| 80 | regmap = <&pmu_system_controller>; |
| 81 | offset = <0x3a00>; /* SYSTEM_CONFIGURATION */ |
| 82 | mask = <0x2>; /* SWRESET_SYSTEM */ |
| 83 | value = <0x2>; /* reset value */ |
| 84 | }; |
| 85 | }; |