A voltage rail that is enabled or monitored by the power sequencer device.
The "check_status_vout", "compare_voltage_to_limit", and "gpio" properties specify how to obtain the pgood status of the rail. You can specify more than one of these properties if necessary.
| Name | Required | Type | Description |
|---|---|---|---|
| name | yes | string | Unique name for the rail. Can only contain letters (A-Z, a-z), numbers (0-9), period (.), and underscore (_). |
| presence | no | string | D-Bus inventory path of a system component which must be present in order for the rail to be present. If this property is not specified, the rail is assumed to always be present. |
| page | see notes | number | PMBus PAGE number of the rail. |
| is_power_supply_rail | no | boolean (true or false) | If true, this rail is produced by a power supply. Power supply rails require special error handling. If an error is detected in a power supply device, and the pgood status is false for a power supply rail, the power supply error is logged as the cause of the pgood failure. The default value of this property is false. |
| check_status_vout | no | boolean (true or false) | If true, determine the pgood status of the rail by checking the value of the PMBus STATUS_VOUT command. If one of the error bits is set, the rail pgood will be considered false. The default value of this property is false. |
| compare_voltage_to_limit | no | boolean (true or false) | If true, determine the pgood status of the rail by comparing the output voltage (READ_VOUT) to the undervoltage fault limit (VOUT_UV_FAULT_LIMIT). If the output voltage is below this limit, the rail pgood will be considered false. The default value of this property is false. |
| gpio | no | gpio | Determine the pgood status of the rail by reading a GPIO. |
{
"name": "VDD_CPU0",
"page": 11,
"check_status_vout": true
}
{
"name": "VCS_CPU1",
"presence": "/xyz/openbmc_project/inventory/system/chassis/motherboard/cpu1",
"gpio": { "line": 60 }
}