Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 125 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/st,stm32mp1-rcc.yaml b/Documentation/devicetree/bindings/clock/st,stm32mp1-rcc.yaml
new file mode 100644
index 000000000..242fe922b
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+++ b/Documentation/devicetree/bindings/clock/st,stm32mp1-rcc.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/st,stm32mp1-rcc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Reset Clock Controller Binding
+
+maintainers:
+  - Gabriel Fernandez <gabriel.fernandez@foss.st.com>
+
+description: |
+  The RCC IP is both a reset and a clock controller.
+  RCC makes also power management (resume/supend and wakeup interrupt).
+  Please also refer to reset.txt for common reset controller binding usage.
+
+  This binding uses common clock bindings
+  Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+  Specifying clocks
+  =================
+
+  All available clocks are defined as preprocessor macros in
+  dt-bindings/clock/stm32mp1-clks.h header and can be used in device
+  tree sources.
+
+  Specifying softreset control of devices
+  =======================================
+
+  Device nodes should specify the reset channel required in their "resets"
+  property, containing a phandle to the reset device node and an index specifying
+  which channel to use.
+  The index is the bit number within the RCC registers bank, starting from RCC
+  base address.
+  It is calculated as: index = register_offset / 4 * 32 + bit_offset.
+  Where bit_offset is the bit offset within the register.
+
+  For example on STM32MP1, for LTDC reset:
+     ltdc = APB4_RSTSETR_offset / 4 * 32 + LTDC_bit_offset
+          = 0x180 / 4 * 32 + 0 = 3072
+
+  The list of valid indices for STM32MP1 is available in:
+  include/dt-bindings/reset-controller/stm32mp1-resets.h
+  include/dt-bindings/reset-controller/stm32mp13-resets.h
+
+  This file implements defines like:
+  #define LTDC_R	3072
+
+properties:
+  "#clock-cells":
+    const: 1
+
+  "#reset-cells":
+    const: 1
+
+  compatible:
+    items:
+      - enum:
+          - st,stm32mp1-rcc-secure
+          - st,stm32mp1-rcc
+          - st,stm32mp13-rcc
+      - const: syscon
+  clocks: true
+  clock-names: true
+
+  reg:
+    maxItems: 1
+
+required:
+  - "#clock-cells"
+  - "#reset-cells"
+  - compatible
+  - reg
+
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - st,stm32mp1-rcc-secure
+          - st,stm32mp13-rcc
+then:
+  properties:
+    clocks:
+      description: Specifies oscillators.
+      maxItems: 5
+
+    clock-names:
+      items:
+        - const: hse
+        - const: hsi
+        - const: csi
+        - const: lse
+        - const: lsi
+  required:
+    - clocks
+    - clock-names
+else:
+  properties:
+    clocks:
+      description:
+        Specifies the external RX clock for ethernet MAC.
+      maxItems: 1
+
+    clock-names:
+      const: ETH_RX_CLK/ETH_REF_CLK
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/stm32mp1-clks.h>
+    rcc: rcc@50000000 {
+        compatible = "st,stm32mp1-rcc-secure", "syscon";
+        reg = <0x50000000 0x1000>;
+        #clock-cells = <1>;
+        #reset-cells = <1>;
+        clock-names = "hse", "hsi", "csi", "lse", "lsi";
+        clocks = <&scmi_clk CK_SCMI_HSE>,
+                 <&scmi_clk CK_SCMI_HSI>,
+                 <&scmi_clk CK_SCMI_CSI>,
+                 <&scmi_clk CK_SCMI_LSE>,
+                 <&scmi_clk CK_SCMI_LSI>;
+    };
+...