forked from Minki/linux
8a29f6c3da
The DC1SW and DC5LDO regulators in the AXP221 are internally chained
to DCDC1 and DCDC5, hence the names. The original bindings used the
parent regulator names for the supply regulator property. This causes
some confusion when we actually use it in the dts:
axp221 {
/* self supplying? */
dcdc1-supply = <&dcdc1>;
dcdc5-supply = <&dcdc5>;
dcdc1: dcdc1 {
...
};
dcdc5: dcdc5 {
...
};
};
Since they are internally connected within the PMIC, their relationships
should not be visible in the device tree.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
125 lines
3.8 KiB
Plaintext
125 lines
3.8 KiB
Plaintext
AXP family PMIC device tree bindings
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The axp20x family current members :
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axp152 (X-Powers)
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axp202 (X-Powers)
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axp209 (X-Powers)
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axp221 (X-Powers)
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Required properties:
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- compatible: "x-powers,axp152", "x-powers,axp202", "x-powers,axp209",
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"x-powers,axp221"
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- reg: The I2C slave address for the AXP chip
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- interrupt-parent: The parent interrupt controller
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- interrupts: SoC NMI / GPIO interrupt connected to the PMIC's IRQ pin
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- interrupt-controller: The PMIC has its own internal IRQs
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- #interrupt-cells: Should be set to 1
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Optional properties:
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- x-powers,dcdc-freq: defines the work frequency of DC-DC in KHz
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(range: 750-1875). Default: 1.5MHz
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- <input>-supply: a phandle to the regulator supply node. May be omitted if
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inputs are unregulated, such as using the IPSOUT output
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from the PMIC.
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- regulators: A node that houses a sub-node for each regulator. Regulators
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not used but preferred to be managed by the OS should be
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listed as well.
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See Documentation/devicetree/bindings/regulator/regulator.txt
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for more information on standard regulator bindings.
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Optional properties for DCDC regulators:
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- x-powers,dcdc-workmode: 1 for PWM mode, 0 for AUTO (PWM/PFM) mode
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Default: Current hardware setting
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The DCDC regulators work in a mixed PWM/PFM mode,
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using PFM under light loads and switching to PWM
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for heavier loads. Forcing PWM mode trades efficiency
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under light loads for lower output noise. This
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probably makes sense for HiFi audio related
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applications that aren't battery constrained.
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AXP202/AXP209 regulators, type, and corresponding input supply names:
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Regulator Type Supply Name Notes
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--------- ---- ----------- -----
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DCDC2 : DC-DC buck : vin2-supply
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DCDC3 : DC-DC buck : vin3-supply
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LDO1 : LDO : acin-supply : always on
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LDO2 : LDO : ldo24in-supply : shared supply
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LDO3 : LDO : ldo3in-supply
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LDO4 : LDO : ldo24in-supply : shared supply
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LDO5 : LDO : ldo5in-supply
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AXP221 regulators, type, and corresponding input supply names:
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Regulator Type Supply Name Notes
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--------- ---- ----------- -----
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DCDC1 : DC-DC buck : vin1-supply
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DCDC2 : DC-DC buck : vin2-supply
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DCDC3 : DC-DC buck : vin3-supply
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DCDC4 : DC-DC buck : vin4-supply
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DCDC5 : DC-DC buck : vin5-supply
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DC1SW : On/Off Switch : : DCDC1 secondary output
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DC5LDO : LDO : : input from DCDC5
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ALDO1 : LDO : aldoin-supply : shared supply
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ALDO2 : LDO : aldoin-supply : shared supply
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ALDO3 : LDO : aldoin-supply : shared supply
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DLDO1 : LDO : dldoin-supply : shared supply
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DLDO2 : LDO : dldoin-supply : shared supply
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DLDO3 : LDO : dldoin-supply : shared supply
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DLDO4 : LDO : dldoin-supply : shared supply
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ELDO1 : LDO : eldoin-supply : shared supply
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ELDO2 : LDO : eldoin-supply : shared supply
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ELDO3 : LDO : eldoin-supply : shared supply
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LDO_IO0 : LDO : ips-supply : GPIO 0
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LDO_IO1 : LDO : ips-supply : GPIO 1
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RTC_LDO : LDO : ips-supply : always on
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Example:
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axp209: pmic@34 {
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compatible = "x-powers,axp209";
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reg = <0x34>;
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interrupt-parent = <&nmi_intc>;
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interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
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interrupt-controller;
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#interrupt-cells = <1>;
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regulators {
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x-powers,dcdc-freq = <1500>;
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vdd_cpu: dcdc2 {
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regulator-always-on;
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regulator-min-microvolt = <1000000>;
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regulator-max-microvolt = <1450000>;
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regulator-name = "vdd-cpu";
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};
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vdd_int_dll: dcdc3 {
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regulator-always-on;
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regulator-min-microvolt = <1000000>;
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regulator-max-microvolt = <1400000>;
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regulator-name = "vdd-int-dll";
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};
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vdd_rtc: ldo1 {
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regulator-always-on;
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regulator-min-microvolt = <1200000>;
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regulator-max-microvolt = <1400000>;
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regulator-name = "vdd-rtc";
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};
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avcc: ldo2 {
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regulator-always-on;
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regulator-min-microvolt = <2700000>;
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regulator-max-microvolt = <3300000>;
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regulator-name = "avcc";
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};
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ldo3 {
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/* unused but preferred to be managed by OS */
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};
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};
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};
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