| Guennadi Liakhovetski | 42dc302 | 2013-06-24 12:50:16 +0200 | [diff] [blame] | 1 | * Maxim MAX8973 Voltage Regulator |
| 2 | |
| 3 | Required properties: |
| 4 | |
| Laxman Dewangan | 0f7d6ec | 2015-06-09 19:17:53 +0530 | [diff] [blame] | 5 | - compatible: must be one of following: |
| 6 | "maxim,max8973" |
| 7 | "maxim,max77621". |
| Guennadi Liakhovetski | 42dc302 | 2013-06-24 12:50:16 +0200 | [diff] [blame] | 8 | - reg: the i2c slave address of the regulator. It should be 0x1b. |
| 9 | |
| 10 | Any standard regulator properties can be used to configure the single max8973 |
| 11 | DCDC. |
| 12 | |
| Laxman Dewangan | c2ffa97 | 2015-04-23 16:10:23 +0530 | [diff] [blame] | 13 | Optional properties: |
| 14 | |
| 15 | -maxim,externally-enable: boolean, externally control the regulator output |
| 16 | enable/disable. |
| Laxman Dewangan | 69eb098 | 2015-04-23 16:10:24 +0530 | [diff] [blame] | 17 | -maxim,enable-gpio: GPIO for enable control. If the valid GPIO is provided |
| 18 | then externally enable control will be considered. |
| Laxman Dewangan | c2ffa97 | 2015-04-23 16:10:23 +0530 | [diff] [blame] | 19 | -maxim,dvs-gpio: GPIO which is connected to DVS pin of device. |
| 20 | -maxim,dvs-default-state: Default state of GPIO during initialisation. |
| 21 | 1 for HIGH and 0 for LOW. |
| 22 | -maxim,enable-remote-sense: boolean, enable reote sense. |
| 23 | -maxim,enable-falling-slew-rate: boolean, enable falling slew rate. |
| 24 | -maxim,enable-active-discharge: boolean: enable active discharge. |
| 25 | -maxim,enable-frequency-shift: boolean, enable 9% frequency shift. |
| 26 | -maxim,enable-bias-control: boolean, enable bias control. By enabling this |
| 27 | startup delay can be reduce to 20us from 220us. |
| Laxman Dewangan | 3692db3 | 2015-07-01 18:31:43 +0530 | [diff] [blame] | 28 | -maxim,enable-etr: boolean, enable Enhanced Transient Response. |
| 29 | -maxim,enable-high-etr-sensitivity: boolean, Enhanced transient response |
| 30 | circuit is enabled and set for high sensitivity. If this |
| 31 | property is available then etr will be enable default. |
| 32 | |
| 33 | Enhanced transient response (ETR) will affect the configuration of CKADV. |
| Laxman Dewangan | c2ffa97 | 2015-04-23 16:10:23 +0530 | [diff] [blame] | 34 | |
| Laxman Dewangan | 19dd159c | 2016-04-13 15:29:44 +0530 | [diff] [blame] | 35 | -junction-warn-millicelsius: u32, junction warning temperature threshold |
| 36 | in millicelsius. If die temperature crosses this level then |
| 37 | device generates the warning interrupts. |
| 38 | |
| 39 | Please note that thermal functionality is only supported on MAX77621. The |
| 40 | supported threshold warning temperature for MAX77621 are 120 degC and 140 degC. |
| 41 | |
| Guennadi Liakhovetski | 42dc302 | 2013-06-24 12:50:16 +0200 | [diff] [blame] | 42 | Example: |
| 43 | |
| 44 | max8973@1b { |
| Guennadi Liakhovetski | f986c35 | 2013-06-25 09:07:06 +0200 | [diff] [blame] | 45 | compatible = "maxim,max8973"; |
| Guennadi Liakhovetski | 42dc302 | 2013-06-24 12:50:16 +0200 | [diff] [blame] | 46 | reg = <0x1b>; |
| 47 | |
| 48 | regulator-min-microvolt = <935000>; |
| 49 | regulator-max-microvolt = <1200000>; |
| 50 | regulator-boot-on; |
| 51 | regulator-always-on; |
| 52 | }; |