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Subject[PATCH v2 1/5] mfd: devicetree: bindings: Add Qualcomm RPM regulator subnodes
Date
Add the regulator subnodes to the Qualcomm RPM MFD device tree bindings.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---
Documentation/devicetree/bindings/mfd/qcom-rpm.txt | 217 +++++++++++++++++++--
1 file changed, 205 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/qcom-rpm.txt b/Documentation/devicetree/bindings/mfd/qcom-rpm.txt
index 85e3198..8eb1ca9 100644
--- a/Documentation/devicetree/bindings/mfd/qcom-rpm.txt
+++ b/Documentation/devicetree/bindings/mfd/qcom-rpm.txt
@@ -31,16 +31,6 @@ frequencies.
Value type: <string-array>
Definition: must be the three strings "ack", "err" and "wakeup", in order

-- #address-cells:
- Usage: required
- Value type: <u32>
- Definition: must be 1
-
-- #size-cells:
- Usage: required
- Value type: <u32>
- Definition: must be 0
-
- qcom,ipc:
Usage: required
Value type: <prop-encoded-array>
@@ -52,6 +42,188 @@ frequencies.
- u32 representing the ipc bit within the register


+= SUBNODES
+
+The RPM exposes resources to its subnodes. The below bindings specify the set
+of valid subnodes that can operate on these resources.
+
+== Regulators
+
+Regulator notes are identified by their compatible:
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: must be one of:
+ "qcom,rpm-pm8058-regulators"
+ "qcom,rpm-pm8901-regulators"
+ "qcom,rpm-pm8921-regulators"
+
+- vdd_l0_l1_lvs-supply:
+- vdd_l2_l11_l12-supply:
+- vdd_l3_l4_l5-supply:
+- vdd_l6_l7-supply:
+- vdd_l8-supply:
+- vdd_l9-supply:
+- vdd_l10-supply:
+- vdd_l13_l16-supply:
+- vdd_l14_l15-supply:
+- vdd_l17_l18-supply:
+- vdd_l19_l20-supply:
+- vdd_l21-supply:
+- vdd_l22-supply:
+- vdd_l23_l24_l25-supply:
+- vdd_ncp-supply:
+- vdd_s0-supply:
+- vdd_s1-supply:
+- vdd_s2-supply:
+- vdd_s3-supply:
+- vdd_s4-supply:
+ Usage: optional (pm8058 only)
+ Value type: <phandle>
+ Definition: reference to regulator supplying the input pin, as
+ described in the data sheet
+
+- lvs0_in-supply:
+- lvs1_in-supply:
+- lvs2_in-supply:
+- lvs3_in-supply:
+- mvs_in-supply:
+- vdd_l0-supply:
+- vdd_l1-supply:
+- vdd_l2-supply:
+- vdd_l3-supply:
+- vdd_l4-supply:
+- vdd_l5-supply:
+- vdd_l6-supply:
+- vdd_s0-supply:
+- vdd_s1-supply:
+- vdd_s2-supply:
+- vdd_s3-supply:
+- vdd_s4-supply:
+ Usage: optional (pm8901 only)
+ Value type: <phandle>
+ Definition: reference to regulator supplying the input pin, as
+ described in the data sheet
+
+- vdd_l1_l2_l12_l18-supply:
+- vdd_l3_l15_l17-supply:
+- vdd_l4_l14-supply:
+- vdd_l5_l8_l16-supply:
+- vdd_l6_l7-supply:
+- vdd_l9_l11-supply:
+- vdd_l10_l22-supply:
+- vdd_l21_l23_l29-supply:
+- vdd_l24-supply:
+- vdd_l25-supply:
+- vdd_l26-supply:
+- vdd_l27-supply:
+- vdd_l28-supply:
+- vdd_ncp-supply:
+- vdd_s1-supply:
+- vdd_s2-supply:
+- vdd_s4-supply:
+- vdd_s5-supply:
+- vdd_s6-supply:
+- vdd_s7-supply:
+- vdd_s8-supply:
+- vin_5vs-supply:
+- vin_lvs1_3_6-supply:
+- vin_lvs2-supply:
+- vin_lvs4_5_7-supply:
+ Usage: optional (pm8921 only)
+ Value type: <phandle>
+ Definition: reference to regulator supplying the input pin, as
+ described in the data sheet
+
+The regulator node houses sub-nodes for each regulator within the device. Each
+sub-node is identified using the node's name, with valid values listed for each
+of the pmics below.
+
+pm8058:
+ l0, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11, l12, l13, l14, l15,
+ l16, l17, l18, l19, l20, l21, l22, l23, l24, l25, s0, s1, s2, s3, s4,
+ lvs0, lvs1, ncp
+
+pm8901:
+ l0, l1, l2, l3, l4, l5, l6, s0, s1, s2, s3, s4, lvs0, lvs1, lvs2, lvs3,
+ mvs
+
+pm8921:
+ s1, s2, s3, s4, s7, s8, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11,
+ l12, l14, l15, l16, l17, l18, l21, l22, l23, l24, l25, l26, l27, l28,
+ l29, lvs1, lvs2, lvs3, lvs4, lvs5, lvs6, lvs7, usb-switch, hdmi-switch,
+ ncp
+
+The content of each sub-node is defined by the standard binding for regulators -
+see regulator.txt - with additional custom properties described below:
+
+=== Switch-mode Power Supply regulator custom properties
+
+- bias-pull-down:
+ Usage: optional
+ Value type: <empty>
+ Definition: enable pull down of the regulator when inactive
+
+- qcom,switch-mode-frequency:
+ Usage: required
+ Value type: <u32>
+ Definition: Frequency (Hz) of the switch-mode power supply;
+ must be one of:
+ 19200000, 9600000, 6400000, 4800000, 3840000, 3200000,
+ 2740000, 2400000, 2130000, 1920000, 1750000, 1600000,
+ 1480000, 1370000, 1280000, 1200000
+
+- qcom,force-mode:
+ Usage: optional (default if no other qcom,force-mode is specified)
+ Value type: <u32>
+ Defintion: indicates that the regulator should be forced to a
+ particular mode, valid values are:
+ QCOM_RPM_FORCE_MODE_NONE - do not force any mode
+ QCOM_RPM_FORCE_MODE_LPM - force into low power mode
+ QCOM_RPM_FORCE_MODE_HPM - force into high power mode
+ QCOM_RPM_FORCE_MODE_AUTO - allow regulator to automatically
+ select its own mode based on
+ realtime current draw, only for:
+ pm8921 smps and ftsmps
+
+- qcom,power-mode-hysteretic:
+ Usage: optional
+ Value type: <empty>
+ Definition: select that the power supply should operate in hysteretic
+ mode, instead of the default pwm mode
+
+=== Low-dropout regulator custom properties
+
+- bias-pull-down:
+ Usage: optional
+ Value type: <empty>
+ Definition: enable pull down of the regulator when inactive
+
+- qcom,force-mode:
+ Usage: optional
+ Value type: <u32>
+ Defintion: indicates that the regulator should not be forced to any
+ particular mode, valid values are:
+ QCOM_RPM_FORCE_MODE_NONE - do not force any mode
+ QCOM_RPM_FORCE_MODE_LPM - force into low power mode
+ QCOM_RPM_FORCE_MODE_HPM - force into high power mode
+ QCOM_RPM_FORCE_MODE_BYPASS - set regulator to use bypass
+ mode, i.e. to act as a switch
+ and not regulate, only for:
+ pm8921 pldo, nldo and nldo1200
+
+=== Negative Charge Pump custom properties
+
+- qcom,switch-mode-frequency:
+ Usage: required
+ Value type: <u32>
+ Definition: Frequency (Hz) of the swith mode power supply;
+ must be one of:
+ 19200000, 9600000, 6400000, 4800000, 3840000, 3200000,
+ 2740000, 2400000, 2130000, 1920000, 1750000, 1600000,
+ 1480000, 1370000, 1280000, 1200000
+
= EXAMPLE

#include <dt-bindings/mfd/qcom-rpm.h>
@@ -64,7 +236,28 @@ frequencies.
interrupts = <0 19 0>, <0 21 0>, <0 22 0>;
interrupt-names = "ack", "err", "wakeup";

- #address-cells = <1>;
- #size-cells = <0>;
+ regulators {
+ compatible = "qcom,rpm-pm8921-regulators";
+ vdd_l1_l2_l12_l18-supply = <&pm8921_s4>;
+
+ s1 {
+ regulator-min-microvolt = <1225000>;
+ regulator-max-microvolt = <1225000>;
+
+ bias-pull-down;
+
+ qcom,switch-mode-frequency = <3200000>;
+ };
+
+ pm8921_s4: s4 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+
+ qcom,switch-mode-frequency = <1600000>;
+ bias-pull-down;
+
+ qcom,force-mode = <QCOM_RPM_FORCE_MODE_AUTO>;
+ };
+ };
};

--
1.8.2.2


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