| QPNP PMIC BUCK current monitoring |
| |
| QPNP PMIC BUCK provides two current limiting interrupts INT1(icritical) and |
| INT2(iwarn), which gets trigger whenever buck load current crosses the |
| programmed threshold (INT1/INT2 interrupt triggers whenever load current |
| crosses INT1_CURRENT/INT2_CURRENT threshold respectively). |
| These interrupts are used for MSM current throttling. |
| |
| [PMIC BUCK current monitor Device Declarations] |
| |
| Required properties: |
| - compatible : should be "qcom,qpnp-buck-current-monitor". |
| - reg : offset and length of the PMIC Aribter register map. |
| - interrupts : Specifies critical and warning interrupt. |
| - interrupt-names : Should contain "iwarn", "icritical". |
| |
| Optional properties: |
| - qcom,icrit-init-threshold-pc : Initial critical current threshold in |
| percentage of maximum rated current (3 Amps). |
| If this value is not specified default is 90% |
| of rated current. |
| - qcom,iwarn-init-threshold-pc : Initial warning current threshold in |
| percentage of maximum rated current (3 Amps). |
| If this value is not specified default is 70% |
| of rated current. |
| - qcom,icrit-polling-delay-msec : Delay for polling RT status register for |
| ICRIT interrupt. |
| - qcom,iwarn-polling-delay-msec : Delay for polling RT status register for |
| IWARN interrupt. |
| - qcom,enable-current-monitor : Enable current monitor. If this property is |
| not specified buck will not generate current |
| limiting interrupts unless explictly enabled |
| from user-space. |
| |
| Example: |
| qpnp-buck-current-monitor@1800 { |
| compatible = "qcom,qpnp-buck-current-monitor"; |
| reg = <0x1800 0x100>; |
| interrupts = <1 0x18 0>, <1 0x18 1>; |
| interrupt-names = "iwarning", "icritical"; |
| qcom,icrit-init-threshold-pc = <90>; |
| qcom,iwarn-init-threshold-pc = <70>; |
| qcom,icrit-polling-delay-msec = <1000>; |
| qcom,iwarn-polling-delay-msec = <2000>; |
| qcom,enable-current-monitor; |
| }; |
