Merge tag 'samsung-drivers-6.8' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into soc/drivers

Samsung SoC driver changes for v6.8

1. Add support for Google GS101 SoC to different drivers: clock
   controller, serial and watchdog.

   The clock driver changes depend on few bindings headers, which I put
   in a topic branch with the bindings refactoring and GS101 support,
   therefore this this pull request includes that bindings topic branch.

   The rest of the bindings topic branch is not necessary here, however
   keeping everything together makes it easier to share between
   branches.  The bindings topic branch is mostly refactoring all the
   compatibles to add SoC-specific compatible followed by fallback.

2. Exynos ChipID: recognize ExynosAutov920.

* tag 'samsung-drivers-6.8' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: (40 commits)
  dt-bindings: clock: google,gs101: rename CMU_TOP gate defines
  watchdog: s3c2410_wdt: Add support for Google gs101 SoC
  watchdog: s3c2410_wdt: Update QUIRK macros to use BIT macro
  watchdog: s3c2410_wdt: Add support for WTCON register DBGACK_MASK bit
  tty: serial: samsung: Add gs101 compatible and common fifoszdt_serial_drv_data
  clk: samsung: clk-gs101: Add cmu_top, cmu_misc and cmu_apm support
  clk: samsung: clk-pll: Add support for pll_{0516,0517,518}
  dt-bindings: clock: google,gs101: fix incorrect numbering and DGB suffix
  dt-bindings: soc: samsung: usi: add google,gs101-usi compatible
  dt-bindings: serial: samsung: Make samsung,uart-fifosize a required property
  dt-bindings: serial: samsung: Add google-gs101-uart compatible
  dt-bindings: watchdog: Document Google gs101 watchdog bindings
  dt-bindings: samsung: exynos-sysreg: combine exynosautov920 with other enum
  dt-bindings: soc: google: exynos-sysreg: add dedicated SYSREG compatibles to GS101
  dt-bindings: clock: Add Google gs101 clock management unit bindings
  dt-bindings: soc: samsung: exynos-pmu: Add gs101 compatible
  dt-bindings: watchdog: samsung: add specific compatible for Tesla FSD
  dt-bindings: samsung: exynos-pmu: add specific compatible for Tesla FSD
  dt-bindings: serial: samsung: add specific compatible for Tesla FSD
  dt-bindings: pwm: samsung: add specific compatible for Tesla FSD
  ...

Link: https://lore.kernel.org/r/20231220084722.22149-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 106 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/google,gs101-clock.yaml b/Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
new file mode 100644
index 000000000000..3eebc03a309b
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
@@ -0,0 +1,106 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/google,gs101-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google GS101 SoC clock controller
+
+maintainers:
+  - Peter Griffin <peter.griffin@linaro.org>
+
+description: |
+  Google GS101 clock controller is comprised of several CMU units, generating
+  clocks for different domains. Those CMU units are modeled as separate device
+  tree nodes, and might depend on each other. The root clock in that clock tree
+  is OSCCLK (24.576 MHz). That external clock must be defined as a fixed-rate
+  clock in dts.
+
+  CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and
+  dividers; all other leaf clocks (other CMUs) are usually derived from CMU_TOP.
+
+  Each clock is assigned an identifier and client nodes can use this identifier
+  to specify the clock which they consume. All clocks available for usage
+  in clock consumer nodes are defined as preprocessor macros in
+  'dt-bindings/clock/gs101.h' header.
+
+properties:
+  compatible:
+    enum:
+      - google,gs101-cmu-top
+      - google,gs101-cmu-apm
+      - google,gs101-cmu-misc
+
+  clocks:
+    minItems: 1
+    maxItems: 2
+
+  clock-names:
+    minItems: 1
+    maxItems: 2
+
+  "#clock-cells":
+    const: 1
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - "#clock-cells"
+  - clocks
+  - clock-names
+  - reg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - google,gs101-cmu-top
+              - google,gs101-cmu-apm
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (24.576 MHz)
+
+        clock-names:
+          items:
+            - const: oscclk
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: google,gs101-cmu-misc
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: Misc bus clock (from CMU_TOP)
+            - description: Misc sss clock (from CMU_TOP)
+
+        clock-names:
+          items:
+            - const: dout_cmu_misc_bus
+            - const: dout_cmu_misc_sss
+
+additionalProperties: false
+
+examples:
+  # Clock controller node for CMU_TOP
+  - |
+    #include <dt-bindings/clock/google,gs101.h>
+
+    cmu_top: clock-controller@1e080000 {
+        compatible = "google,gs101-cmu-top";
+        reg = <0x1e080000 0x8000>;
+        #clock-cells = <1>;
+        clocks = <&ext_24_5m>;
+        clock-names = "oscclk";
+    };
+
+...