Merge tag 'regulator-v6.8' of git://git.kernel.org/pub/scm/linux/kern…

…el/git/broonie/regulator

Pull regulator updates from Mark Brown:
 "The main updates for this release are around monitoring of regulators,
  largely for error handling purposes. We allow the stream of regulator
  events to be seen by userspace as netlink events and allow system
  integrators to describe individual regulators as system critical with
  information on how long the system is expected to last on error. The
  system level error handling is very much about best effort problem
  mitigation rather than providing something fully robust, the initial
  drive was to provide a mechanism for trying to avoid initiating any
  new writes to flash once we notice the power going out.

  Otherwise it's very quiet, mainly several new Qualcomm devices.

   - Support for marking regulators as system critical and providing
     information on how long the system might last with those regulators
     in a failure state, hooked into the existing critical shutdown
     error handling.

   - Optional support for generating netlink events for events, there
     are use cases for system monitoring UIs and error handling.

   - A command line option to leave unused controllable regulators
     enabled, useful for debugging. We already only disable regulators
     we were explicitly given permission to control.

   - Support for Quacomm MP5496, PM8010 and PM8937"

* tag 'regulator-v6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (31 commits)
  regulator: event: Ensure atomicity for sequence number
  uapi: regulator: Fix typo
  regulator: Reuse LINEAR_RANGE() in REGULATOR_LINEAR_RANGE()
  dt-bindings: regulator: qcom,usb-vbus-regulator: clean up example
  regulator: qcom_smd: Add LDO5 MP5496 regulator
  regulator: qcom-rpmh: add support for pm8010 regulators
  regulator: dt-bindings: qcom,rpmh: add compatible for pm8010
  regulator: qcom-rpmh: extend to support multiple linear voltage ranges
  regulator: wm8350: Convert to platform remove callback returning void
  regulator: virtual: Convert to platform remove callback returning void
  regulator: userspace-consumer: Convert to platform remove callback returning void
  regulator: uniphier: Convert to platform remove callback returning void
  regulator: stm32-vrefbuf: Convert to platform remove callback returning void
  regulator: db8500-prcmu: Convert to platform remove callback returning void
  regulator: bd9571mwv: Convert to platform remove callback returning void
  regulator: arizona-ldo1: Convert to platform remove callback returning void
  regulator: event: Add regulator netlink event support
  regulator: event: Add regulator netlink event support
  regulator: stpmic1: Fix kernel-doc notation warnings
  regulator: palmas: remove redundant initialization of pointer pdata
  ...

Documentation/admin-guide/kernel-parameters.txt

@@ -5544,6 +5544,13 @@
 			print every Nth verbose statement, where N is the value
 			specified.
 
+	regulator_ignore_unused
+			[REGULATOR]
+			Prevents regulator framework from disabling regulators
+			that are unused, due no driver claiming them. This may
+			be useful for debug and development, but should not be
+			needed on a platform with proper driver support.
+
 	relax_domain_level=
 			[KNL, SMP] Set scheduler's default relax_domain_level.
 			See Documentation/admin-guide/cgroup-v1/cpusets.rst.

Documentation/devicetree/bindings/regulator/fixed-regulator.yaml

@@ -105,6 +105,8 @@ properties:
     description:
       Interrupt signaling a critical under-voltage event.
 
+  system-critical-regulator: true
+
 required:
   - compatible
   - regulator-name

Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml

@@ -42,6 +42,7 @@ description: |
       For PM7325, smps1 - smps8, ldo1 - ldo19
       For PM8005, smps1 - smps4
       For PM8009, smps1 - smps2, ldo1 - ldo7
+      For PM8010, ldo1 - ldo7
       For PM8150, smps1 - smps10, ldo1 - ldo18
       For PM8150L, smps1 - smps8, ldo1 - ldo11, bob, flash, rgb
       For PM8350, smps1 - smps12, ldo1 - ldo10
@@ -68,6 +69,7 @@ properties:
       - qcom,pm8005-rpmh-regulators
       - qcom,pm8009-rpmh-regulators
       - qcom,pm8009-1-rpmh-regulators
+      - qcom,pm8010-rpmh-regulators
       - qcom,pm8150-rpmh-regulators
       - qcom,pm8150l-rpmh-regulators
       - qcom,pm8350-rpmh-regulators
@@ -238,6 +240,18 @@ allOf:
         "^vdd-l[1-47]-supply$": true
         "^vdd-s[1-2]-supply$": true
 
+  - if:
+      properties:
+        compatible:
+          enum:
+            - qcom,pm8010-rpmh-regulators
+    then:
+      properties:
+        vdd-l1-l2-supply: true
+        vdd-l3-l4-supply: true
+      patternProperties:
+        "^vdd-l[5-7]-supply$": true
+
   - if:
       properties:
         compatible:

Documentation/devicetree/bindings/regulator/qcom,smd-rpm-regulator.yaml

@@ -47,6 +47,9 @@ description:
   For pm8916, s1, s2, s3, s4, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11,
   l12, l13, l14, l15, l16, l17, l18
 
+  For pm8937, s1, s2, s3, s4, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10,
+  l11, l12, l13, l14, l15, l16, l17, l18, l19, l20, l21, l22, l23
+
   For pm8941, s1, s2, s3, s4, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11,
   l12, l13, l14, l15, l16, l17, l18, l19, l20, l21, l22, l23, l24, lvs1, lvs2,
   lvs3, 5vs1, 5vs2
@@ -92,6 +95,7 @@ properties:
       - qcom,rpm-pm8841-regulators
       - qcom,rpm-pm8909-regulators
       - qcom,rpm-pm8916-regulators
+      - qcom,rpm-pm8937-regulators
       - qcom,rpm-pm8941-regulators
       - qcom,rpm-pm8950-regulators
       - qcom,rpm-pm8953-regulators

Documentation/devicetree/bindings/regulator/qcom,spmi-regulator.yaml

@@ -22,6 +22,7 @@ properties:
       - qcom,pm8841-regulators
       - qcom,pm8909-regulators
       - qcom,pm8916-regulators
+      - qcom,pm8937-regulators
       - qcom,pm8941-regulators
       - qcom,pm8950-regulators
       - qcom,pm8994-regulators
@@ -291,6 +292,24 @@ allOf:
       patternProperties:
         "^vdd_s[1-3]-supply$": true
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,pm8937-regulators
+    then:
+      properties:
+        vdd_l1_l19-supply: true
+        vdd_l20_l21-supply: true
+        vdd_l2_l23-supply: true
+        vdd_l3-supply: true
+        vdd_l4_l5_l6_l7_l16-supply: true
+        vdd_l8_l11_l12_l17_l22-supply: true
+        vdd_l9_l10_l13_l14_l15_l18-supply: true
+      patternProperties:
+        "^vdd_s[1-6]-supply$": true
+
   - if:
       properties:
         compatible:

Documentation/devicetree/bindings/regulator/qcom,usb-vbus-regulator.yaml

@@ -36,10 +36,11 @@ unevaluatedProperties: false
 
 examples:
   - |
-     pm8150b {
+     pmic {
         #address-cells = <1>;
         #size-cells = <0>;
-        pm8150b_vbus: usb-vbus-regulator@1100 {
+
+        usb-vbus-regulator@1100 {
             compatible = "qcom,pm8150b-vbus-reg";
             reg = <0x1100>;
             regulator-min-microamp = <500000>;

Documentation/devicetree/bindings/regulator/regulator.yaml

@@ -114,6 +114,11 @@ properties:
     description: Enable pull down resistor when the regulator is disabled.
     type: boolean
 
+  system-critical-regulator:
+    description: Set if the regulator is critical to system stability or
+      functionality.
+    type: boolean
+
   regulator-over-current-protection:
     description: Enable over current protection.
     type: boolean
@@ -181,6 +186,14 @@ properties:
       be enabled but limit setting can be omitted. Limit is given as microvolt
       offset from voltage set to regulator.
 
+  regulator-uv-less-critical-window-ms:
+    description: Specifies the time window (in milliseconds) following a
+      critical under-voltage event during which the system can continue to
+      operate safely while performing less critical operations. This property
+      provides a defined duration before a more severe reaction to the
+      under-voltage event is needed, allowing for certain non-urgent actions to
+      be carried out in preparation for potential power loss.
+
   regulator-temp-protection-kelvin:
     description: Set over temperature protection limit. This is a limit where
       hardware performs emergency shutdown. Zero can be passed to disable

drivers/regulator/Kconfig

@@ -56,6 +56,16 @@ config REGULATOR_USERSPACE_CONSUMER
 
 	  If unsure, say no.
 
+config REGULATOR_NETLINK_EVENTS
+	bool "Enable support for receiving regulator events via netlink"
+	depends on NET
+	help
+	  Enabling this option allows the kernel to broadcast regulator events using
+	  the netlink mechanism. User-space applications can subscribe to these events
+	  for real-time updates on various regulator events.
+
+	  If unsure, say no.
+
 config REGULATOR_88PG86X
 	tristate "Marvell 88PG86X voltage regulators"
 	depends on I2C

drivers/regulator/Makefile

@@ -5,6 +5,7 @@
 
 
 obj-$(CONFIG_REGULATOR) += core.o dummy.o fixed-helper.o helpers.o devres.o irq_helpers.o
+obj-$(CONFIG_REGULATOR_NETLINK_EVENTS) += event.o
 obj-$(CONFIG_OF) += of_regulator.o
 obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
 obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o

drivers/regulator/arizona-ldo1.c

@@ -339,14 +339,12 @@ static int arizona_ldo1_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int arizona_ldo1_remove(struct platform_device *pdev)
+static void arizona_ldo1_remove(struct platform_device *pdev)
 {
 	struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
 
 	if (ldo1->ena_gpiod)
 		gpiod_put(ldo1->ena_gpiod);
-
-	return 0;
 }
 
 static int madera_ldo1_probe(struct platform_device *pdev)
@@ -377,7 +375,7 @@ static int madera_ldo1_probe(struct platform_device *pdev)
 
 static struct platform_driver arizona_ldo1_driver = {
 	.probe = arizona_ldo1_probe,
-	.remove = arizona_ldo1_remove,
+	.remove_new = arizona_ldo1_remove,
 	.driver		= {
 		.name	= "arizona-ldo1",
 		.probe_type = PROBE_FORCE_SYNCHRONOUS,
@@ -386,7 +384,7 @@ static struct platform_driver arizona_ldo1_driver = {
 
 static struct platform_driver madera_ldo1_driver = {
 	.probe = madera_ldo1_probe,
-	.remove = arizona_ldo1_remove,
+	.remove_new = arizona_ldo1_remove,
 	.driver		= {
 		.name	= "madera-ldo1",
 		.probe_type = PROBE_FORCE_SYNCHRONOUS,

drivers/regulator/bd9571mwv-regulator.c

@@ -260,10 +260,9 @@ static const struct dev_pm_ops bd9571mwv_pm  = {
 	SET_SYSTEM_SLEEP_PM_OPS(bd9571mwv_suspend, bd9571mwv_resume)
 };
 
-static int bd9571mwv_regulator_remove(struct platform_device *pdev)
+static void bd9571mwv_regulator_remove(struct platform_device *pdev)
 {
 	device_remove_file(&pdev->dev, &dev_attr_backup_mode);
-	return 0;
 }
 #define DEV_PM_OPS	&bd9571mwv_pm
 #else
@@ -357,7 +356,7 @@ static struct platform_driver bd9571mwv_regulator_driver = {
 		.pm = DEV_PM_OPS,
 	},
 	.probe = bd9571mwv_regulator_probe,
-	.remove = bd9571mwv_regulator_remove,
+	.remove_new = bd9571mwv_regulator_remove,
 	.id_table = bd9571mwv_regulator_id_table,
 };
 module_platform_driver(bd9571mwv_regulator_driver);