Merge tag 'samsung-dt64-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/dt

Samsung DTS ARM64 changes for v5.17

1. Add bindings for: Exynos USI, Samsung Galaxy A8 (2018) board, WinLink
   E850-96 board and WinLink vendor prefix.
2. Add pinctrl definitions used for Exynos850.
3. Minor fixes and improvements.
4. Convert serial on ExynosAutov9 to new hierarchy where serial is part
   of USI node.

* tag 'samsung-dt64-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  dt-bindings: pinctrl: samsung: Add pin drive definitions for Exynos850
  dt-bindings: arm: samsung: Document E850-96 board binding
  dt-bindings: Add vendor prefix for WinLink
  dt-bindings: arm: samsung: document jackpotlte board binding
  dt-bindings: soc: samsung: Fix I2C clocks order in USI binding example
  arm64: dts: exynos: convert serial_0 to USI on ExynosAutov9
  dt-bindings: soc: samsung: Add Exynos USI bindings
  arm64: dts: exynos: Rename hsi2c nodes to i2c for Exynos5433 and Exynos7

Link: https://lore.kernel.org/r/20211220115530.30961-2-krzysztof.kozlowski@canonical.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 173 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml b/Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml
index ef6dc14be4b5..052cd94113d4 100644
--- a/Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml
+++ b/Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml
@@ -199,6 +199,18 @@ properties:
               - samsung,exynos7-espresso        # Samsung Exynos7 Espresso
           - const: samsung,exynos7
 
+      - description: Exynos7885 based boards
+        items:
+          - enum:
+              - samsung,jackpotlte              # Samsung Galaxy A8 (2018)
+          - const: samsung,exynos7885
+
+      - description: Exynos850 based boards
+        items:
+          - enum:
+              - winlink,e850-96                 # WinLink E850-96
+          - const: samsung,exynos850
+
       - description: Exynos Auto v9 based boards
         items:
           - enum:
diff --git a/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml b/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml
new file mode 100644
index 000000000000..273f2d95a043
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml
@@ -0,0 +1,159 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/samsung/exynos-usi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung's Exynos USI (Universal Serial Interface) binding
+
+maintainers:
+  - Sam Protsenko <semen.protsenko@linaro.org>
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+
+description: |
+  USI IP-core provides selectable serial protocol (UART, SPI or High-Speed I2C).
+  USI shares almost all internal circuits within each protocol, so only one
+  protocol can be chosen at a time. USI is modeled as a node with zero or more
+  child nodes, each representing a serial sub-node device. The mode setting
+  selects which particular function will be used.
+
+  Refer to next bindings documentation for information on protocol subnodes that
+  can exist under USI node:
+
+  [1] Documentation/devicetree/bindings/serial/samsung_uart.yaml
+  [2] Documentation/devicetree/bindings/i2c/i2c-exynos5.txt
+  [3] Documentation/devicetree/bindings/spi/spi-samsung.txt
+
+properties:
+  $nodename:
+    pattern: "^usi@[0-9a-f]+$"
+
+  compatible:
+    enum:
+      - samsung,exynos850-usi   # for USIv2 (Exynos850, ExynosAutoV9)
+
+  reg: true
+
+  clocks: true
+
+  clock-names: true
+
+  ranges: true
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+  samsung,sysreg:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description:
+      Should be phandle/offset pair. The phandle to System Register syscon node
+      (for the same domain where this USI controller resides) and the offset
+      of SW_CONF register for this USI controller.
+
+  samsung,mode:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Selects USI function (which serial protocol to use). Refer to
+      <include/dt-bindings/soc/samsung,exynos-usi.h> for valid USI mode values.
+
+  samsung,clkreq-on:
+    type: boolean
+    description:
+      Enable this property if underlying protocol requires the clock to be
+      continuously provided without automatic gating. As suggested by SoC
+      manual, it should be set in case of SPI/I2C slave, UART Rx and I2C
+      multi-master mode. Usually this property is needed if USI mode is set
+      to "UART".
+
+      This property is optional.
+
+patternProperties:
+  # All other properties should be child nodes
+  "^(serial|spi|i2c)@[0-9a-f]+$":
+    type: object
+    description: Child node describing underlying USI serial protocol
+
+required:
+  - compatible
+  - ranges
+  - "#address-cells"
+  - "#size-cells"
+  - samsung,sysreg
+  - samsung,mode
+
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - samsung,exynos850-usi
+
+then:
+  properties:
+    reg:
+      maxItems: 1
+
+    clocks:
+      items:
+        - description: Bus (APB) clock
+        - description: Operating clock for UART/SPI/I2C protocol
+
+    clock-names:
+      items:
+        - const: pclk
+        - const: ipclk
+
+  required:
+    - reg
+    - clocks
+    - clock-names
+
+else:
+  properties:
+    reg: false
+    clocks: false
+    clock-names: false
+    samsung,clkreq-on: false
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/soc/samsung,exynos-usi.h>
+
+    usi0: usi@138200c0 {
+        compatible = "samsung,exynos850-usi";
+        reg = <0x138200c0 0x20>;
+        samsung,sysreg = <&sysreg_peri 0x1010>;
+        samsung,mode = <USI_V2_UART>;
+        samsung,clkreq-on; /* needed for UART mode */
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+        clocks = <&cmu_peri 32>, <&cmu_peri 31>;
+        clock-names = "pclk", "ipclk";
+
+        serial_0: serial@13820000 {
+            compatible = "samsung,exynos850-uart";
+            reg = <0x13820000 0xc0>;
+            interrupts = <GIC_SPI 227 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&cmu_peri 32>, <&cmu_peri 31>;
+            clock-names = "uart", "clk_uart_baud0";
+            status = "disabled";
+        };
+
+        hsi2c_0: i2c@13820000 {
+            compatible = "samsung,exynosautov9-hsi2c";
+            reg = <0x13820000 0xc0>;
+            interrupts = <GIC_SPI 227 IRQ_TYPE_LEVEL_HIGH>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+            clocks = <&cmu_peri 31>, <&cmu_peri 32>;
+            clock-names = "hsi2c", "hsi2c_pclk";
+            status = "disabled";
+        };
+    };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index b491666ba620..6e2ac5bd16f8 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1322,6 +1322,8 @@ patternProperties:
     description: Wiligear, Ltd.
   "^winbond,.*":
     description: Winbond Electronics corp.
+  "^winlink,.*":
+    description: WinLink Co., Ltd
   "^winstar,.*":
     description: Winstar Display Corp.
   "^wits,.*":