[PATCH RESEND v2 1/5] dt-bindings: pci: st-pcie: PCIe controller found on STi platforms

Alain Volmat
2022-01-03T07:49:29Z

Addition of the bindings for the Designware based PCIe controller
that can be found on STi platforms such as STiH407, STiH410 or STiH418.

Signed-off-by: Alain Volmat <avolmat@me.com>
---
.../devicetree/bindings/pci/snps,dw-pcie.yaml | 2 +-
.../devicetree/bindings/pci/st,st-pcie.yaml | 112 ++++++++++++++++++
2 files changed, 113 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/pci/st,st-pcie.yaml

diff --git a/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
index 9ed0dfba7f89..3a92078128f7 100644
--- a/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
@@ -35,7 +35,7 @@ properties:
maxItems: 5
items:
enum: [ dbi, dbi2, config, atu, app, elbi, mgmt, ctrl, parf, cfg, link,
- ulreg, smu, mpu, apb, phy ]
+ ulreg, smu, mpu, apb, phy, mem-window ]

num-lanes:
description: |
diff --git a/Documentation/devicetree/bindings/pci/st,st-pcie.yaml b/Documentation/devicetree/bindings/pci/st,st-pcie.yaml
new file mode 100644
index 000000000000..2fa686d573c3
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/st,st-pcie.yaml
@@ -0,0 +1,112 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/st,st-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PCIe RC controller on ST STi platform
+
+maintainers:
+ - Alain Volmat <avolmat@me.com>
+
+allOf:
+ - $ref: /schemas/pci/snps,dw-pcie.yaml#
+
+properties:
+ compatible:
+ const: st,stih407-pcie
+
+ reg:
+ items:
+ - description: Controller control and status registers.
+ - description: PCIe configuration registers.
+ - description: Memory made available to the controller
+
+ reg-names:
+ items:
+ - const: dbi
+ - const: config
+ - const: mem-window
+
+ interrupts:
+ maxItems: 1
+
+ resets:
+ items:
+ - description: Controller reset
+ - description: Powerdown reset (optional)
+ minItems: 1
+
+ reset-names:
+ items:
+ - const: softreset
+ - const: powerdown
+ minItems: 1
+
+ phys:
+ maxItems: 1
+
+ phy-names:
+ const: pcie
+
+ reset-gpios: true
+
+ st,syscfg:
+ $ref: "/schemas/types.yaml#/definitions/phandle-array"
+ description: syscfg node phandle and offsets of the 2 registers
+ controlling root complex and ltssm.
+
+required:
+ - interrupts
+ - '#interrupt-cells'
+ - interrupt-map
+ - interrupt-map-mask
+ - resets
+ - reset-names
+ - phys
+ - phy-names
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/phy/phy.h>
+ #include <dt-bindings/reset/stih407-resets.h>
+ pcie1: pcie@9b10000 {
+ compatible = "st,stih407-pcie";
+ device_type = "pci";
+ #address-cells = <3>;
+ #size-cells = <2>;
+ reg = <0x09b10000 0x1000>,
+ <0x3fff0000 0x10000>,
+ <0x40000000 0xc0000000>;
+ reg-names = "dbi", "config", "mem-window";
+
+ #interrupt-cells = <1>;
+ interrupts = <GIC_SPI 175 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "msi";
+ interrupt-map-mask = <0 0 0 7>;
+ interrupt-map = <0 0 0 1 &intc GIC_SPI 171 IRQ_TYPE_LEVEL_HIGH>,
+ <0 0 0 2 &intc GIC_SPI 172 IRQ_TYPE_LEVEL_HIGH>,
+ <0 0 0 3 &intc GIC_SPI 173 IRQ_TYPE_LEVEL_HIGH>,
+ <0 0 0 4 &intc GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+
+ st,syscfg = <&syscfg_core 0xdc 0xe4>;
+
+ ranges = <0x82000000 0 0x30000000 0x30000000 0 0x05550000>, /* non-prefetchable memory */
+ <0xc2000000 0 0x35550000 0x35550000 0 0x0AAA0000>; /* prefetchable memory */
+ bus-range = <0x00 0xff>;
+
+ resets = <&softreset STIH407_PCIE1_SOFTRESET>,
+ <&powerdown STIH407_PCIE1_POWERDOWN>;
+
+ reset-names = "softreset", "powerdown";
+
+ phys = <&phy_port1 PHY_TYPE_PCIE>;
+ phy-names = "pcie";
+
+ reset-gpios = <&pio34 5 GPIO_ACTIVE_LOW>;
+ };