[3/5] dt-bindings: PCI: Add STM32MP25 PCIe endpoint bindings

Commit Message

Christian Bruel Nov. 12, 2024, 4:19 p.m. UTC

STM32MP25 PCIe Controller is based on the DesignWare core configured as
end point mode from the SYSCFG register.

Signed-off-by: Christian Bruel <[e-mail]>
---
 .../bindings/pci/st,stm32-pcie-ep.yaml        | 97 +++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/st,stm32-pcie-ep.yaml

Patch

diff --git a/Documentation/devicetree/bindings/pci/st,stm32-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/st,stm32-pcie-ep.yaml
new file mode 100644
index 000000000000..f0d215982794
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/st,stm32-pcie-ep.yaml
@@ -0,0 +1,97 @@ 
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/st,stm32-pcie-ep.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STM32MP25 PCIe endpoint driver
+
+maintainers:
+  - Christian Bruel <[e-mail]>
+
+description:
+  PCIe endpoint controller based on the Synopsys DesignWare PCIe core.
+
+allOf:
+  - $ref: /schemas/pci/snps,dw-pcie-common.yaml#
+
+properties:
+  compatible:
+    const: st,stm32mp25-pcie-ep
+
+  reg:
+    items:
+      - description: Data Bus Interface (DBI) registers.
+      - description: PCIe configuration registers.
+
+  reg-names:
+    items:
+      - const: dbi
+      - const: addr_space
+
+  clocks:
+    maxItems: 1
+    description: PCIe system clock
+
+  clock-names:
+    const: core
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: core
+
+  phys:
+    maxItems: 1
+
+  phy-names:
+    const: pcie-phy
+
+  reset-gpios:
+    description: GPIO controlled connection to PERST# signal
+    maxItems: 1
+
+  access-controllers:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - resets
+  - reset-names
+  - clocks
+  - clock-names
+  - phys
+  - phy-names
+  - reset-gpios
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/st,stm32mp25-rcc.h>
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/phy/phy.h>
+    #include <dt-bindings/reset/st,stm32mp25-rcc.h>
+
+    pcie-ep@48400000 {
+        compatible = "st,stm32mp25-pcie-ep";
+        num-lanes = <1>;
+        reg = <0x48400000 0x400000>,
+              <0x10000000 0x8000000>;
+        reg-names = "dbi", "addr_space";
+        clocks = <&rcc CK_BUS_PCIE>;
+        clock-names = "core";
+        phys = <&combophy PHY_TYPE_PCIE>;
+        phy-names = "pcie-phy";
+        resets = <&rcc PCIE_R>;
+        reset-names = "core";
+        pinctrl-names = "default", "init";
+        pinctrl-0 = <&pcie_pins_a>;
+        pinctrl-1 = <&pcie_init_pins_a>;
+        reset-gpios = <&gpioj 8 GPIO_ACTIVE_LOW>;
+        power-domains = <&CLUSTER_PD>;
+        access-controllers = <&rifsc 68>;
+    };