1af41e8dbSPrzemyslaw MarczakVoltage/Current regulator 2af41e8dbSPrzemyslaw Marczak 3af41e8dbSPrzemyslaw MarczakBinding: 4af41e8dbSPrzemyslaw MarczakThe regulator devices don't use the "compatible" property. The binding is done 5*bf802f5dSFelix Brackby the prefix of regulator node's name, or, if this fails, by the prefix of the 6*bf802f5dSFelix Brackregulator's "regulator-name" property. Usually the pmic I/O driver will provide 7af41e8dbSPrzemyslaw Marczakthe array of 'struct pmic_child_info' with the prefixes and compatible drivers. 8af41e8dbSPrzemyslaw MarczakThe bind is done by calling function: pmic_bind_childs(). 9af41e8dbSPrzemyslaw MarczakExample drivers: 10af41e8dbSPrzemyslaw Marczakpmic: drivers/power/pmic/max77686.c 11af41e8dbSPrzemyslaw Marczakregulator: drivers/power/regulator/max77686.c 12af41e8dbSPrzemyslaw Marczak 13af41e8dbSPrzemyslaw MarczakFor the node name e.g.: "prefix[:alpha:]num { ... }": 14bd2259e3SFelix Brack- the driver prefix should be: "prefix" - case sensitive 15af41e8dbSPrzemyslaw Marczak- the node name's "num" is set as "dev->driver_data" on bind 16af41e8dbSPrzemyslaw Marczak 17bd2259e3SFelix BrackExample the prefix "ldo" will pass for: "ldo1", "ldo@1", "ldoreg@1, ... 18af41e8dbSPrzemyslaw Marczak 19*bf802f5dSFelix BrackBinding by means of the node's name is preferred. However if the node names 20*bf802f5dSFelix Brackwould produce ambiguous prefixes (like "regulator@1" and "regualtor@11") and you 21*bf802f5dSFelix Brackcan't or do not want to change them then binding against the "regulator-name" 22*bf802f5dSFelix Brackproperty is possible. The syntax for the prefix of the "regulator-name" property 23*bf802f5dSFelix Brackis the same as the one for the regulator's node name. 24*bf802f5dSFelix BrackUse case: a regulator named "regulator@1" to be bound to a driver named 25*bf802f5dSFelix Brack"LDO_DRV" and a regulator named "regualator@11" to be bound to an other driver 26*bf802f5dSFelix Bracknamed "BOOST_DRV". Using prefix "regualtor@1" for driver matching would load 27*bf802f5dSFelix Brackthe same driver for both regulators, hence the prefix is ambiguous. 28*bf802f5dSFelix Brack 29af41e8dbSPrzemyslaw MarczakOptional properties: 30*bf802f5dSFelix Brack- regulator-name: a string, required by the regulator uclass, used for driver 31*bf802f5dSFelix Brack binding if binding by node's name prefix fails 32af41e8dbSPrzemyslaw Marczak- regulator-min-microvolt: a minimum allowed Voltage value 33af41e8dbSPrzemyslaw Marczak- regulator-max-microvolt: a maximum allowed Voltage value 34af41e8dbSPrzemyslaw Marczak- regulator-min-microamp: a minimum allowed Current value 35af41e8dbSPrzemyslaw Marczak- regulator-max-microamp: a maximum allowed Current value 36af41e8dbSPrzemyslaw Marczak- regulator-always-on: regulator should never be disabled 37af41e8dbSPrzemyslaw Marczak- regulator-boot-on: enabled by bootloader/firmware 38af41e8dbSPrzemyslaw Marczak 3940ade2ceSPeng FanNote 4040ade2ceSPeng FanThe "regulator-name" constraint is used for setting the device's uclass 4140ade2ceSPeng Fanplatform data '.name' field. And the regulator device name is set from 4240ade2ceSPeng Fanit's node name. If "regulator-name" is not provided in dts, node name 4340ade2ceSPeng Fanis chosen for setting the device's uclass platform data '.name' field. 4440ade2ceSPeng Fan 45af41e8dbSPrzemyslaw MarczakOther kernel-style properties, are currently not used. 46af41e8dbSPrzemyslaw Marczak 47af41e8dbSPrzemyslaw MarczakNote: 48af41e8dbSPrzemyslaw MarczakFor the regulator autoset from constraints, the framework expects that: 49af41e8dbSPrzemyslaw Marczak- regulator-min-microvolt is equal to regulator-max-microvolt 50af41e8dbSPrzemyslaw Marczak- regulator-min-microamp is equal to regulator-max-microamp 51af41e8dbSPrzemyslaw Marczak- regulator-always-on or regulator-boot-on is set 52af41e8dbSPrzemyslaw Marczak 53af41e8dbSPrzemyslaw MarczakExample: 54af41e8dbSPrzemyslaw Marczakldo0 { 55af41e8dbSPrzemyslaw Marczak /* Optional */ 5640ade2ceSPeng Fan regulator-name = "VDDQ_EMMC_1.8V"; 57af41e8dbSPrzemyslaw Marczak regulator-min-microvolt = <1800000>; 58af41e8dbSPrzemyslaw Marczak regulator-max-microvolt = <1800000>; 59af41e8dbSPrzemyslaw Marczak regulator-min-microamp = <100000>; 60af41e8dbSPrzemyslaw Marczak regulator-max-microamp = <100000>; 61af41e8dbSPrzemyslaw Marczak regulator-always-on; 62af41e8dbSPrzemyslaw Marczak regulator-boot-on; 63af41e8dbSPrzemyslaw Marczak}; 64