diff options
Diffstat (limited to 'Documentation/devicetree/bindings/regulator/rohm,bd71847-regulator.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/regulator/rohm,bd71847-regulator.yaml | 74 |
1 files changed, 67 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/regulator/rohm,bd71847-regulator.yaml b/Documentation/devicetree/bindings/regulator/rohm,bd71847-regulator.yaml index 07256a4b50b9..7ba4ccf723d8 100644 --- a/Documentation/devicetree/bindings/regulator/rohm,bd71847-regulator.yaml +++ b/Documentation/devicetree/bindings/regulator/rohm,bd71847-regulator.yaml @@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml# title: ROHM BD71847 and BD71850 Power Management Integrated Circuit regulators maintainers: - - Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> + - Matti Vaittinen <mazziesaccount@gmail.com> description: | List of regulators provided by this controller. BD71847 regulators node @@ -22,9 +22,9 @@ description: | not be disabled by driver at startup. If BUCK5 is disabled at startup the voltage monitoring for LDO5/LDO6 can cause PMIC to reset. -#The valid names for BD71847 regulator nodes are: -#BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6 -#LDO1, LDO2, LDO3, LDO4, LDO5, LDO6 +# The valid names for BD71847 regulator nodes are: +# BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6 +# LDO1, LDO2, LDO3, LDO4, LDO5, LDO6 patternProperties: "^LDO[1-6]$": @@ -54,7 +54,7 @@ patternProperties: should be "buck1", ..., "buck6" rohm,dvs-run-voltage: - $ref: "/schemas/types.yaml#/definitions/uint32" + $ref: /schemas/types.yaml#/definitions/uint32 minimum: 0 maximum: 1300000 description: @@ -62,7 +62,7 @@ patternProperties: bucks which support this. 0 means disabled. rohm,dvs-idle-voltage: - $ref: "/schemas/types.yaml#/definitions/uint32" + $ref: /schemas/types.yaml#/definitions/uint32 minimum: 0 maximum: 1300000 description: @@ -70,7 +70,7 @@ patternProperties: bucks which support this. 0 means disabled. rohm,dvs-suspend-voltage: - $ref: "/schemas/types.yaml#/definitions/uint32" + $ref: /schemas/types.yaml#/definitions/uint32 minimum: 0 maximum: 1300000 description: @@ -88,6 +88,66 @@ patternProperties: # ---------------------------------------------------------------- # rest | not supported | not supported | not supported + # BD718(47/50) power outputs can either be controlled by the PMIC internal + # hardware state machine or by software. If you need regulators to be + # turned ON/OFF for example based on PMIC_STBY_REQ line (which toggles + # PMIC HW state machine) - then you should set this property. + # Tradeoff is that then SW can't control the ON/OFF state for this + # regulator (other than invoking a PMIC state change). + rohm,no-regulator-enable-control: + description: | + Enable/Disable control of this regulator must be left to the + PMIC hardware state machine. + type: boolean + + # Setups where regulator (especially the buck8) output voltage is scaled + # by adding external connection where some other regulator output is + # connected to feedback-pin (over suitable resistors) is getting popular + # amongst users of BD71837. (This allows for example scaling down the + # buck8 voltages to suit lover GPU voltages for projects where buck8 is + # (ab)used to supply power for GPU. + # + # So we allow describing this external connection from DT and scale the + # voltages accordingly. This is what the connection should look like: + # + # |---------------| + # | buck 8 |-------+----->Vout + # | | | + # |---------------| | + # | | + # | | + # +-------+--R2----+ + # | + # R1 + # | + # V FB-pull-up + # + # Here the buck output is sifted according to formula: + # + # Vout_o = Vo - (Vpu - Vo)*R2/R1 + # Linear_step = step_orig*(R1+R2)/R1 + # + # where: + # Vout_o is adjusted voltage output at vsel reg value 0 + # Vo is original voltage output at vsel reg value 0 + # Vpu is the pull-up voltage V FB-pull-up in the picture + # R1 and R2 are resistor values. + + rohm,fb-pull-up-microvolt: + description: + Feedback-pin has pull-up connection to adjust voltage range. This is + the used pull-up voltage before R1. + + rohm,feedback-pull-up-r1-ohms: + description: + Feedback-pin has pull-up connection to adjust voltage range. This is + the used R1 resistor. + + rohm,feedback-pull-up-r2-ohms: + description: + Feedback-pin has pull-up connection to adjust voltage range. This is + the used R2 resistor. + required: - regulator-name |