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>

9 files changed, 258 insertions, 33 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,.*":
diff --git a/arch/arm64/boot/dts/exynos/exynos5433.dtsi b/arch/arm64/boot/dts/exynos/exynos5433.dtsi
index 4422021cf4b2..bfe4ed8a23d6 100644
--- a/arch/arm64/boot/dts/exynos/exynos5433.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos5433.dtsi
@@ -1585,7 +1585,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_0: hsi2c@14e40000 {
+		hsi2c_0: i2c@14e40000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14e40000 0x1000>;
 			interrupts = <GIC_SPI 428 IRQ_TYPE_LEVEL_HIGH>;
@@ -1598,7 +1598,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_1: hsi2c@14e50000 {
+		hsi2c_1: i2c@14e50000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14e50000 0x1000>;
 			interrupts = <GIC_SPI 429 IRQ_TYPE_LEVEL_HIGH>;
@@ -1611,7 +1611,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_2: hsi2c@14e60000 {
+		hsi2c_2: i2c@14e60000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14e60000 0x1000>;
 			interrupts = <GIC_SPI 430 IRQ_TYPE_LEVEL_HIGH>;
@@ -1624,7 +1624,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_3: hsi2c@14e70000 {
+		hsi2c_3: i2c@14e70000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14e70000 0x1000>;
 			interrupts = <GIC_SPI 431 IRQ_TYPE_LEVEL_HIGH>;
@@ -1637,7 +1637,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_4: hsi2c@14ec0000 {
+		hsi2c_4: i2c@14ec0000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14ec0000 0x1000>;
 			interrupts = <GIC_SPI 424 IRQ_TYPE_LEVEL_HIGH>;
@@ -1650,7 +1650,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_5: hsi2c@14ed0000 {
+		hsi2c_5: i2c@14ed0000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14ed0000 0x1000>;
 			interrupts = <GIC_SPI 425 IRQ_TYPE_LEVEL_HIGH>;
@@ -1663,7 +1663,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_6: hsi2c@14ee0000 {
+		hsi2c_6: i2c@14ee0000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14ee0000 0x1000>;
 			interrupts = <GIC_SPI 426 IRQ_TYPE_LEVEL_HIGH>;
@@ -1676,7 +1676,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_7: hsi2c@14ef0000 {
+		hsi2c_7: i2c@14ef0000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14ef0000 0x1000>;
 			interrupts = <GIC_SPI 427 IRQ_TYPE_LEVEL_HIGH>;
@@ -1689,7 +1689,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_8: hsi2c@14d90000 {
+		hsi2c_8: i2c@14d90000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14d90000 0x1000>;
 			interrupts = <GIC_SPI 443 IRQ_TYPE_LEVEL_HIGH>;
@@ -1702,7 +1702,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_9: hsi2c@14da0000 {
+		hsi2c_9: i2c@14da0000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14da0000 0x1000>;
 			interrupts = <GIC_SPI 444 IRQ_TYPE_LEVEL_HIGH>;
@@ -1715,7 +1715,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_10: hsi2c@14de0000 {
+		hsi2c_10: i2c@14de0000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14de0000 0x1000>;
 			interrupts = <GIC_SPI 445 IRQ_TYPE_LEVEL_HIGH>;
@@ -1728,7 +1728,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_11: hsi2c@14df0000 {
+		hsi2c_11: i2c@14df0000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14df0000 0x1000>;
 			interrupts = <GIC_SPI 446 IRQ_TYPE_LEVEL_HIGH>;
diff --git a/arch/arm64/boot/dts/exynos/exynos7.dtsi b/arch/arm64/boot/dts/exynos/exynos7.dtsi
index c73a597ca66e..c3efbc8add38 100644
--- a/arch/arm64/boot/dts/exynos/exynos7.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos7.dtsi
@@ -359,7 +359,7 @@
 			interrupts = <GIC_SPI 384 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
-		hsi2c_0: hsi2c@13640000 {
+		hsi2c_0: i2c@13640000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x13640000 0x1000>;
 			interrupts = <GIC_SPI 441 IRQ_TYPE_LEVEL_HIGH>;
@@ -372,7 +372,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_1: hsi2c@13650000 {
+		hsi2c_1: i2c@13650000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x13650000 0x1000>;
 			interrupts = <GIC_SPI 442 IRQ_TYPE_LEVEL_HIGH>;
@@ -385,7 +385,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_2: hsi2c@14e60000 {
+		hsi2c_2: i2c@14e60000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14e60000 0x1000>;
 			interrupts = <GIC_SPI 459 IRQ_TYPE_LEVEL_HIGH>;
@@ -398,7 +398,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_3: hsi2c@14e70000 {
+		hsi2c_3: i2c@14e70000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14e70000 0x1000>;
 			interrupts = <GIC_SPI 460 IRQ_TYPE_LEVEL_HIGH>;
@@ -411,7 +411,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_4: hsi2c@13660000 {
+		hsi2c_4: i2c@13660000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x13660000 0x1000>;
 			interrupts = <GIC_SPI 443 IRQ_TYPE_LEVEL_HIGH>;
@@ -424,7 +424,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_5: hsi2c@13670000 {
+		hsi2c_5: i2c@13670000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x13670000 0x1000>;
 			interrupts = <GIC_SPI 444 IRQ_TYPE_LEVEL_HIGH>;
@@ -437,7 +437,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_6: hsi2c@14e00000 {
+		hsi2c_6: i2c@14e00000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14e00000 0x1000>;
 			interrupts = <GIC_SPI 461 IRQ_TYPE_LEVEL_HIGH>;
@@ -450,7 +450,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_7: hsi2c@13e10000 {
+		hsi2c_7: i2c@13e10000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x13e10000 0x1000>;
 			interrupts = <GIC_SPI 462 IRQ_TYPE_LEVEL_HIGH>;
@@ -463,7 +463,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_8: hsi2c@14e20000 {
+		hsi2c_8: i2c@14e20000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x14e20000 0x1000>;
 			interrupts = <GIC_SPI 463 IRQ_TYPE_LEVEL_HIGH>;
@@ -476,7 +476,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_9: hsi2c@13680000 {
+		hsi2c_9: i2c@13680000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x13680000 0x1000>;
 			interrupts = <GIC_SPI 445 IRQ_TYPE_LEVEL_HIGH>;
@@ -489,7 +489,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_10: hsi2c@13690000 {
+		hsi2c_10: i2c@13690000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x13690000 0x1000>;
 			interrupts = <GIC_SPI 446 IRQ_TYPE_LEVEL_HIGH>;
@@ -502,7 +502,7 @@
 			status = "disabled";
 		};
 
-		hsi2c_11: hsi2c@136a0000 {
+		hsi2c_11: i2c@136a0000 {
 			compatible = "samsung,exynos7-hsi2c";
 			reg = <0x136a0000 0x1000>;
 			interrupts = <GIC_SPI 447 IRQ_TYPE_LEVEL_HIGH>;
diff --git a/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts b/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts
index ef46d7aa6e28..57518cb5e8c4 100644
--- a/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts
+++ b/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts
@@ -54,3 +54,7 @@
 	vcc-supply = <&ufs_0_fixed_vcc_reg>;
 	vcc-fixed-regulator;
 };
+
+&usi_0 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/exynos/exynosautov9.dtsi b/arch/arm64/boot/dts/exynos/exynosautov9.dtsi
index 3e4727344b4a..0fab0aa4db3f 100644
--- a/arch/arm64/boot/dts/exynos/exynosautov9.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynosautov9.dtsi
@@ -7,6 +7,7 @@
  */
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/soc/samsung,exynos-usi.h>
 
 / {
 	compatible = "samsung,exynosautov9";
@@ -256,16 +257,35 @@
 			reg = <0x17c20000 0x1000>;
 		};
 
-		/* USI: UART */
-		serial_0: uart@10300000 {
-			compatible = "samsung,exynos850-uart";
-			reg = <0x10300000 0x100>;
-			interrupts = <GIC_SPI 345 IRQ_TYPE_LEVEL_HIGH>;
-			pinctrl-names = "default";
-			pinctrl-0 = <&uart0_bus_dual>;
+		syscon_peric0: syscon@10220000 {
+			compatible = "samsung,exynosautov9-sysreg", "syscon";
+			reg = <0x10220000 0x2000>;
+		};
+
+		usi_0: usi@103000c0 {
+			compatible = "samsung,exynos850-usi";
+			reg = <0x103000c0 0x20>;
+			samsung,sysreg = <&syscon_peric0 0x1000>;
+			samsung,mode = <USI_V2_UART>;
+			samsung,clkreq-on; /* needed for UART mode */
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges;
 			clocks = <&uart_clock>, <&uart_clock>;
-			clock-names = "uart", "clk_uart_baud0";
+			clock-names = "pclk", "ipclk";
 			status = "disabled";
+
+			/* USI: UART */
+			serial_0: serial@10300000 {
+				compatible = "samsung,exynos850-uart";
+				reg = <0x10300000 0xc0>;
+				interrupts = <GIC_SPI 345 IRQ_TYPE_LEVEL_HIGH>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&uart0_bus_dual>;
+				clocks = <&uart_clock>, <&uart_clock>;
+				clock-names = "uart", "clk_uart_baud0";
+				status = "disabled";
+			};
 		};
 
 		ufs_0_phy: ufs0-phy@17e04000 {
diff --git a/include/dt-bindings/pinctrl/samsung.h b/include/dt-bindings/pinctrl/samsung.h
index b1832506b923..950970634dfe 100644
--- a/include/dt-bindings/pinctrl/samsung.h
+++ b/include/dt-bindings/pinctrl/samsung.h
@@ -36,7 +36,10 @@
 #define EXYNOS5260_PIN_DRV_LV4		2
 #define EXYNOS5260_PIN_DRV_LV6		3
 
-/* Drive strengths for Exynos5410, Exynos542x and Exynos5800 */
+/*
+ * Drive strengths for Exynos5410, Exynos542x, Exynos5800 and Exynos850 (except
+ * GPIO_HSI block)
+ */
 #define EXYNOS5420_PIN_DRV_LV1		0
 #define EXYNOS5420_PIN_DRV_LV2		1
 #define EXYNOS5420_PIN_DRV_LV3		2
@@ -56,6 +59,14 @@
 #define EXYNOS5433_PIN_DRV_SLOW_SR5	0xc
 #define EXYNOS5433_PIN_DRV_SLOW_SR6	0xf
 
+/* Drive strengths for Exynos850 GPIO_HSI block */
+#define EXYNOS850_HSI_PIN_DRV_LV1	0	/* 1x   */
+#define EXYNOS850_HSI_PIN_DRV_LV1_5	1	/* 1.5x */
+#define EXYNOS850_HSI_PIN_DRV_LV2	2	/* 2x   */
+#define EXYNOS850_HSI_PIN_DRV_LV2_5	3	/* 2.5x */
+#define EXYNOS850_HSI_PIN_DRV_LV3	4	/* 3x   */
+#define EXYNOS850_HSI_PIN_DRV_LV4	5	/* 4x   */
+
 #define EXYNOS_PIN_FUNC_INPUT		0
 #define EXYNOS_PIN_FUNC_OUTPUT		1
 #define EXYNOS_PIN_FUNC_2		2
diff --git a/include/dt-bindings/soc/samsung,exynos-usi.h b/include/dt-bindings/soc/samsung,exynos-usi.h
new file mode 100644
index 000000000000..a01af169d249
--- /dev/null
+++ b/include/dt-bindings/soc/samsung,exynos-usi.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright (c) 2021 Linaro Ltd.
+ * Author: Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * Device Tree bindings for Samsung Exynos USI (Universal Serial Interface).
+ */
+
+#ifndef __DT_BINDINGS_SAMSUNG_EXYNOS_USI_H
+#define __DT_BINDINGS_SAMSUNG_EXYNOS_USI_H
+
+#define USI_V2_NONE		0
+#define USI_V2_UART		1
+#define USI_V2_SPI		2
+#define USI_V2_I2C		3
+
+#endif /* __DT_BINDINGS_SAMSUNG_EXYNOS_USI_H */