From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../devicetree/bindings/i2c/st,stm32-i2c.yaml      | 161 +++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml

(limited to 'Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml')

diff --git a/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml b/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml
new file mode 100644
index 000000000..bf396e946
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml
@@ -0,0 +1,161 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/st,stm32-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C controller embedded in STMicroelectronics STM32 I2C platform
+
+maintainers:
+  - Pierre-Yves MORDRET <pierre-yves.mordret@foss.st.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - st,stm32f7-i2c
+              - st,stm32mp13-i2c
+              - st,stm32mp15-i2c
+    then:
+      properties:
+        i2c-scl-rising-time-ns:
+          default: 25
+
+        i2c-scl-falling-time-ns:
+          default: 10
+    else:
+      properties:
+        st,syscfg-fmp: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - st,stm32f4-i2c
+    then:
+      properties:
+        clock-frequency:
+          enum: [100000, 400000]
+
+properties:
+  compatible:
+    enum:
+      - st,stm32f4-i2c
+      - st,stm32f7-i2c
+      - st,stm32mp13-i2c
+      - st,stm32mp15-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: interrupt ID for I2C event
+      - description: interrupt ID for I2C error
+
+  interrupt-names:
+    items:
+      - const: event
+      - const: error
+
+  resets:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  dmas:
+    items:
+      - description: RX DMA Channel phandle
+      - description: TX DMA Channel phandle
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+  clock-frequency:
+    description: Desired I2C bus clock frequency in Hz. If not specified,
+                 the default 100 kHz frequency will be used.
+                 For STM32F7, STM32H7 and STM32MP1 SoCs, if timing parameters
+                 match, the bus clock frequency can be from 1Hz to 1MHz.
+    default: 100000
+    minimum: 1
+    maximum: 1000000
+
+  st,syscfg-fmp:
+    description: Use to set Fast Mode Plus bit within SYSCFG when Fast Mode
+      Plus speed is selected by slave.
+    $ref: "/schemas/types.yaml#/definitions/phandle-array"
+    items:
+      - items:
+          - description: phandle to syscfg
+          - description: register offset within syscfg
+          - description: register bitmask for FMP bit
+
+  wakeup-source: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - resets
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/mfd/stm32f7-rcc.h>
+    #include <dt-bindings/clock/stm32fx-clock.h>
+    //Example 1 (with st,stm32f4-i2c compatible)
+      i2c@40005400 {
+          compatible = "st,stm32f4-i2c";
+          #address-cells = <1>;
+          #size-cells = <0>;
+          reg = <0x40005400 0x400>;
+          interrupts = <31>,
+                       <32>;
+          resets = <&rcc 277>;
+          clocks = <&rcc 0 149>;
+      };
+
+  - |
+    #include <dt-bindings/mfd/stm32f7-rcc.h>
+    #include <dt-bindings/clock/stm32fx-clock.h>
+    //Example 2 (with st,stm32f7-i2c compatible)
+      i2c@40005800 {
+          compatible = "st,stm32f7-i2c";
+          #address-cells = <1>;
+          #size-cells = <0>;
+          reg = <0x40005800 0x400>;
+          interrupts = <31>,
+                       <32>;
+          resets = <&rcc STM32F7_APB1_RESET(I2C1)>;
+          clocks = <&rcc 1 CLK_I2C1>;
+      };
+
+  - |
+    #include <dt-bindings/mfd/stm32f7-rcc.h>
+    #include <dt-bindings/clock/stm32fx-clock.h>
+    //Example 3 (with st,stm32mp15-i2c compatible on stm32mp)
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/stm32mp1-clks.h>
+    #include <dt-bindings/reset/stm32mp1-resets.h>
+      i2c@40013000 {
+          compatible = "st,stm32mp15-i2c";
+          #address-cells = <1>;
+          #size-cells = <0>;
+          reg = <0x40013000 0x400>;
+          interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
+                       <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+          clocks = <&rcc I2C2_K>;
+          resets = <&rcc I2C2_R>;
+          i2c-scl-rising-time-ns = <185>;
+          i2c-scl-falling-time-ns = <20>;
+          st,syscfg-fmp = <&syscfg 0x4 0x2>;
+      };
-- 
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