Merge tag 'timers-core-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer and timekeeping updates from Thomas Gleixner:
 "Core code:

   - Make the NOHZ handling of the timekeeping/tick core more robust to
     prevent a rare jiffies update stall.

   - Handle softirqs in the NOHZ/idle case correctly

  Drivers:

   - Add support for event stream scaling of the 1GHz counter on ARM(64)

   - Correct an error code check in the timer-of layer

   - The usual cleanups and improvements all over the place"

* tag 'timers-core-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  lib/irq_poll: Declare IRQ_POLL softirq vector as ksoftirqd-parking safe
  tick/rcu: Stop allowing RCU_SOFTIRQ in idle
  tick/rcu: Remove obsolete rcu_needs_cpu() parameters
  tick: Detect and fix jiffies update stall
  clocksource/drivers/timer-of: Check return value of of_iomap in timer_of_base_init()
  clocksource/drivers/timer-microchip-pit64b: Use 5MHz for clockevent
  clocksource/drivers/timer-microchip-pit64b: Use notrace
  clocksource/drivers/timer-microchip-pit64b: Remove mmio selection
  dt-bindings: timer: Tegra: Convert text bindings to yaml
  clocksource/drivers/imx-tpm: Move tpm_read_sched_clock() under CONFIG_ARM
  clocksource/drivers/arm_arch_timer: Use event stream scaling when available
  clocksource/drivers/exynos_mct: Increase the size of name array
  clocksource/drivers/exynos_mct: Bump up mct max irq number
  clocksource/drivers/exynos_mct: Remove mct interrupt index enum
  clocksource/drivers/exynos_mct: Handle DTS with higher number of interrupts
  clocksource/drivers/timer-ti-dm: Fix regression from errata i940 fix
  clocksource/drivers/imx-tpm: Exclude sched clock for ARM64
  clocksource: Add a Kconfig option for WATCHDOG_MAX_SKEW
  clocksource/drivers/imx-tpm: Update name of clkevt
  clocksource/drivers/imx-tpm: Add CLOCK_EVT_FEAT_DYNIRQ
  ...

4 files changed, 150 insertions, 88 deletions

diff --git a/Documentation/devicetree/bindings/timer/nvidia,tegra-timer.yaml b/Documentation/devicetree/bindings/timer/nvidia,tegra-timer.yaml
new file mode 100644
index 000000000000..b78209cd0f28
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/nvidia,tegra-timer.yaml
@@ -0,0 +1,150 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/timer/nvidia,tegra-timer.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: NVIDIA Tegra timer
+
+maintainers:
+  - Stephen Warren <swarren@nvidia.com>
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: nvidia,tegra210-timer
+    then:
+      properties:
+        interrupts:
+          # Either a single combined interrupt or up to 14 individual interrupts
+          minItems: 1
+          maxItems: 14
+          description: >
+            A list of 14 interrupts; one per each timer channels 0 through 13
+
+  - if:
+      properties:
+        compatible:
+          oneOf:
+            - items:
+                - enum:
+                    - nvidia,tegra114-timer
+                    - nvidia,tegra124-timer
+                    - nvidia,tegra132-timer
+                - const: nvidia,tegra30-timer
+            - items:
+                - const: nvidia,tegra30-timer
+                - const: nvidia,tegra20-timer
+    then:
+      properties:
+        interrupts:
+          # Either a single combined interrupt or up to 6 individual interrupts
+          minItems: 1
+          maxItems: 6
+          description: >
+            A list of 6 interrupts; one per each of timer channels 1 through 5,
+            and one for the shared interrupt for the remaining channels.
+
+  - if:
+      properties:
+        compatible:
+          const: nvidia,tegra20-timer
+    then:
+      properties:
+        interrupts:
+          # Either a single combined interrupt or up to 4 individual interrupts
+          minItems: 1
+          maxItems: 4
+          description: |
+            A list of 4 interrupts; one per timer channel.
+
+properties:
+  compatible:
+    oneOf:
+      - const: nvidia,tegra210-timer
+        description: >
+          The Tegra210 timer provides fourteen 29-bit timer counters and one 32-bit
+          timestamp counter. The TMRs run at either a fixed 1 MHz clock rate derived
+          from the oscillator clock (TMR0-TMR9) or directly at the oscillator clock
+          (TMR10-TMR13). Each TMR can be programmed to generate one-shot, periodic,
+          or watchdog interrupts.
+      - items:
+          - enum:
+              - nvidia,tegra114-timer
+              - nvidia,tegra124-timer
+              - nvidia,tegra132-timer
+          - const: nvidia,tegra30-timer
+      - items:
+          - const: nvidia,tegra30-timer
+          - const: nvidia,tegra20-timer
+        description: >
+          The Tegra30 timer provides ten 29-bit timer channels, a single 32-bit free
+          running counter, and 5 watchdog modules. The first two channels may also
+          trigger a legacy watchdog reset.
+      - const: nvidia,tegra20-timer
+        description: >
+          The Tegra20 timer provides four 29-bit timer channels and a single 32-bit free
+          running counter. The first two channels may also trigger a watchdog reset.
+
+  reg:
+    maxItems: 1
+
+  interrupts: true
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: timer
+
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    timer@60005000 {
+        compatible = "nvidia,tegra30-timer", "nvidia,tegra20-timer";
+        reg = <0x60005000 0x400>;
+        interrupts = <0 0 IRQ_TYPE_LEVEL_HIGH>,
+                     <0 1 IRQ_TYPE_LEVEL_HIGH>,
+                     <0 41 IRQ_TYPE_LEVEL_HIGH>,
+                     <0 42 IRQ_TYPE_LEVEL_HIGH>,
+                     <0 121 IRQ_TYPE_LEVEL_HIGH>,
+                     <0 122 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&tegra_car 214>;
+    };
+  - |
+    #include <dt-bindings/clock/tegra210-car.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    timer@60005000 {
+        compatible = "nvidia,tegra210-timer";
+        reg = <0x60005000 0x400>;
+        interrupts = <GIC_SPI 156 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 152 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 177 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 178 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 179 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&tegra_car TEGRA210_CLK_TIMER>;
+        clock-names = "timer";
+    };
diff --git a/Documentation/devicetree/bindings/timer/nvidia,tegra20-timer.txt b/Documentation/devicetree/bindings/timer/nvidia,tegra20-timer.txt
deleted file mode 100644
index 4a864bd10d3d..000000000000
--- a/Documentation/devicetree/bindings/timer/nvidia,tegra20-timer.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-NVIDIA Tegra20 timer
-
-The Tegra20 timer provides four 29-bit timer channels and a single 32-bit free
-running counter. The first two channels may also trigger a watchdog reset.
-
-Required properties:
-
-- compatible : should be "nvidia,tegra20-timer".
-- reg : Specifies base physical address and size of the registers.
-- interrupts : A list of 4 interrupts; one per timer channel.
-- clocks : Must contain one entry, for the module clock.
-  See ../clocks/clock-bindings.txt for details.
-
-Example:
-
-timer {
-	compatible = "nvidia,tegra20-timer";
-	reg = <0x60005000 0x60>;
-	interrupts = <0 0 0x04
-			0 1 0x04
-			0 41 0x04
-			0 42 0x04>;
-	clocks = <&tegra_car 132>;
-};
diff --git a/Documentation/devicetree/bindings/timer/nvidia,tegra210-timer.txt b/Documentation/devicetree/bindings/timer/nvidia,tegra210-timer.txt
deleted file mode 100644
index 032cda96fe0d..000000000000
--- a/Documentation/devicetree/bindings/timer/nvidia,tegra210-timer.txt
+++ /dev/null
@@ -1,36 +0,0 @@
-NVIDIA Tegra210 timer
-
-The Tegra210 timer provides fourteen 29-bit timer counters and one 32-bit
-timestamp counter. The TMRs run at either a fixed 1 MHz clock rate derived
-from the oscillator clock (TMR0-TMR9) or directly at the oscillator clock
-(TMR10-TMR13). Each TMR can be programmed to generate one-shot, periodic,
-or watchdog interrupts.
-
-Required properties:
-- compatible : "nvidia,tegra210-timer".
-- reg : Specifies base physical address and size of the registers.
-- interrupts : A list of 14 interrupts; one per each timer channels 0 through
-  13.
-- clocks : Must contain one entry, for the module clock.
-  See ../clocks/clock-bindings.txt for details.
-
-timer@60005000 {
-	compatible = "nvidia,tegra210-timer";
-	reg = <0x0 0x60005000 0x0 0x400>;
-	interrupts = <GIC_SPI 156 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 152 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 177 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 178 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 179 IRQ_TYPE_LEVEL_HIGH>;
-	clocks = <&tegra_car TEGRA210_CLK_TIMER>;
-	clock-names = "timer";
-};
diff --git a/Documentation/devicetree/bindings/timer/nvidia,tegra30-timer.txt b/Documentation/devicetree/bindings/timer/nvidia,tegra30-timer.txt
deleted file mode 100644
index 1761f53ee36f..000000000000
--- a/Documentation/devicetree/bindings/timer/nvidia,tegra30-timer.txt
+++ /dev/null
@@ -1,28 +0,0 @@
-NVIDIA Tegra30 timer
-
-The Tegra30 timer provides ten 29-bit timer channels, a single 32-bit free
-running counter, and 5 watchdog modules. The first two channels may also
-trigger a legacy watchdog reset.
-
-Required properties:
-
-- compatible : For Tegra30, must contain "nvidia,tegra30-timer".  Otherwise,
-  must contain '"nvidia,<chip>-timer", "nvidia,tegra30-timer"' where
-  <chip> is tegra124 or tegra132.
-- reg : Specifies base physical address and size of the registers.
-- interrupts : A list of 6 interrupts; one per each of timer channels 1
-    through 5, and one for the shared interrupt for the remaining channels.
-- clocks : Must contain one entry, for the module clock.
-  See ../clocks/clock-bindings.txt for details.
-
-timer {
-	compatible = "nvidia,tegra30-timer", "nvidia,tegra20-timer";
-	reg = <0x60005000 0x400>;
-	interrupts = <0 0 0x04
-		      0 1 0x04
-		      0 41 0x04
-		      0 42 0x04
-		      0 121 0x04
-		      0 122 0x04>;
-	clocks = <&tegra_car 214>;
-};