Merge tag 'linux-watchdog-6.3-rc1' of git://www.linux-watchdog.org/linux-watchdog

Pull watchdog updates from Wim Van Sebroeck:

 - qcom-wdt dt-bindings improvements and additions (like MSM8994 and
   MDM9615)

 - mtk_wdt: Add reset_by_toprgu support

 - devm_clk_get_enabled() helper changes

 - Fix kmemleak in watchdog_cdev_register

 - watchdog sysfs improvements

 - Other fixes and small improvements

* tag 'linux-watchdog-6.3-rc1' of git://www.linux-watchdog.org/linux-watchdog: (52 commits)
  watchdog: at91rm9200: Only warn once about problems in .remove()
  watchdog: mt7621-wdt: avoid ralink architecture dependent code
  watchdog: mt7621-wdt: avoid static global declarations
  dt-bindings: watchdog: mt7621-wdt: add phandle to access system controller registers
  watchdog: sbsa_wdog: Make sure the timeout programming is within the limits
  dt-bindings: watchdog: qcom-wdt: add qcom,apss-wdt-sa8775p compatible
  watchdog: report options in sysfs
  watchdog: report fw_version in sysfs
  dt-bindings: watchdog: fsl-imx: document suspend in wait mode
  watchdog: imx2_wdg: suspend watchdog in WAIT mode
  watchdog: pcwd_usb: Fix attempting to access uninitialized memory
  dt-bindings: watchdog: qcom-wdt: merge MSM timer
  dt-bindings: watchdog: qcom-wdt: allow interrupts
  dt-bindings: watchdog: qcom-wdt: add qcom,kpss-wdt-mdm9615
  dt-bindings: watchdog: qcom-wdt: fix list of MSM timer compatibles
  dt-bindings: watchdog: qcom-wdt: do not allow fallback alone
  dt-bindings: watchdog: qcom-wdt: require fallback for IPQ4019
  watchdog: Fix kmemleak in watchdog_cdev_register
  watchdog: Include <linux/kstrtox.h> when appropriate
  watchdog: at91sam9_wdt: use devm_request_irq to avoid missing free_irq() in error path
  ...

Author: torvalds

Documentation/ABI/testing/sysfs-class-watchdog

@@ -6,6 +6,19 @@ Description:
 		device at boot. It is equivalent to WDIOC_GETBOOTSTATUS of
 		ioctl interface.
 
+What:		/sys/class/watchdog/watchdogn/options
+Date:		April 2023
+Contact:	Thomas Weißschuh
+Description:
+		It is a read only file. It contains options of watchdog device.
+
+What:		/sys/class/watchdog/watchdogn/fw_version
+Date:		April 2023
+Contact:	Thomas Weißschuh
+Description:
+		It is a read only file. It contains firmware version of
+		watchdog device.
+
 What:		/sys/class/watchdog/watchdogn/identity
 Date:		August 2015
 Contact:	Wim Van Sebroeck <[email protected]>

Documentation/devicetree/bindings/timer/qcom,msm-timer.txt

@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/amlogic,meson6-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic Meson6 SoCs Watchdog timer
+
+maintainers:
+  - Neil Armstrong <[email protected]>
+  - Martin Blumenstingl <[email protected]>
+
+allOf:
+  - $ref: watchdog.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - amlogic,meson6-wdt
+          - amlogic,meson8-wdt
+          - amlogic,meson8b-wdt
+      - items:
+          - const: amlogic,meson8m2-wdt
+          - const: amlogic,meson8b-wdt
+
+  interrupts:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - interrupts
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    wdt: watchdog@c1109900 {
+        compatible = "amlogic,meson6-wdt";
+        reg = <0xc1109900 0x8>;
+        interrupts = <GIC_SPI 0 IRQ_TYPE_EDGE_RISING>;
+        timeout-sec = <10>;
+    };

Documentation/devicetree/bindings/watchdog/amlogic,meson6-wdt.yaml

@@ -9,9 +9,6 @@ title: Freescale i.MX Watchdog Timer (WDT) Controller
 maintainers:
   - Anson Huang <[email protected]>
 
-allOf:
-  - $ref: "watchdog.yaml#"
-
 properties:
   compatible:
     oneOf:
@@ -55,11 +52,45 @@ properties:
       If present, the watchdog device is configured to assert its
       external reset (WDOG_B) instead of issuing a software reset.
 
+  fsl,suspend-in-wait:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      If present, the watchdog device is suspended in WAIT mode
+      (Suspend-to-Idle). Only supported on certain devices.
+
 required:
   - compatible
   - interrupts
   - reg
 
+allOf:
+  - $ref: watchdog.yaml#
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - fsl,imx25-wdt
+                - fsl,imx35-wdt
+                - fsl,imx50-wdt
+                - fsl,imx51-wdt
+                - fsl,imx53-wdt
+                - fsl,imx6q-wdt
+                - fsl,imx6sl-wdt
+                - fsl,imx6sll-wdt
+                - fsl,imx6sx-wdt
+                - fsl,imx6ul-wdt
+                - fsl,imx7d-wdt
+                - fsl,imx8mm-wdt
+                - fsl,imx8mn-wdt
+                - fsl,imx8mp-wdt
+                - fsl,imx8mq-wdt
+                - fsl,vf610-wdt
+    then:
+      properties:
+        fsl,suspend-in-wait: false
+
 unevaluatedProperties: false
 
 examples:

Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml

@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/gpio-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GPIO controlled watchdog
+
+maintainers:
+  - Robert Marko <[email protected]>
+
+properties:
+  compatible:
+    const: linux,wdt-gpio
+
+  gpios:
+    maxItems: 1
+    description: GPIO connected to the WDT reset pin
+
+  hw_algo:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: Algorithm used by the driver
+    oneOf:
+      - description:
+          Either a high-to-low or a low-to-high transition clears the WDT counter.
+          The watchdog timer is disabled when GPIO is left floating or connected
+          to a three-state buffer.
+        const: toggle
+      - description:
+          Low or high level starts counting WDT timeout, the opposite level
+          disables the WDT.
+          Active level is determined by the GPIO flags.
+        const: level
+
+  hw_margin_ms:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Maximum time to reset watchdog circuit (in milliseconds)
+    minimum: 2
+    maximum: 65535
+
+  always-running:
+    type: boolean
+    description:
+      If the watchdog timer cannot be disabled, add this flag to have the driver
+      keep toggling the signal without a client.
+      It will only cease to toggle the signal when the device is open and the
+      timeout elapsed.
+
+required:
+  - compatible
+  - gpios
+  - hw_algo
+  - hw_margin_ms
+
+unevaluatedProperties: false

Documentation/devicetree/bindings/watchdog/gpio-wdt.yaml

@@ -19,6 +19,12 @@ properties:
   reg:
     maxItems: 1
 
+  mediatek,sysctl:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to system controller 'sysc' syscon node which
+      controls system registers
+
 required:
   - compatible
   - reg
@@ -30,4 +36,5 @@ examples:
     watchdog@100 {
       compatible = "mediatek,mt7621-wdt";
       reg = <0x100 0x100>;
+      mediatek,sysctl = <&sysc>;
     };

Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml

@@ -52,6 +52,12 @@ properties:
     description: Disable sending output reset signal
     type: boolean
 
+  mediatek,reset-by-toprgu:
+    description: The Top Reset Generation Unit (TOPRGU) generates reset signals
+      and distributes them to each IP. If present, the watchdog timer will be
+      reset by TOPRGU once system resets.
+    type: boolean
+
   '#reset-cells':
     const: 1