Thread (7 messages) 7 messages, 3 authors, 2023-02-01
STALE1254d
Revisions (5)
  1. v1 [diff vs current]
  2. v2 [diff vs current]
  3. v3 [diff vs current]
  4. v4 current
  5. v5 [diff vs current]

[PATCH v4 1/3] dt-bindings: pinctrl: add schema for NXP S32 SoCs

From: Chester Lin <hidden>
Date: 2023-01-18 10:45:31
Also in: linux-arm-kernel, linux-gpio, lkml
Subsystem: open firmware and flattened device tree bindings, pin control subsystem, pin controller - freescale, the rest · Maintainers: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Walleij, Dong Aisheng, Fabio Estevam, Frank Li, Jacky Bai, Linus Torvalds

Add DT schema for the pinctrl driver of NXP S32 SoC family.

Signed-off-by: Larisa Grigore <redacted>
Signed-off-by: Ghennadi Procopciuc <Ghennadi.Procopciuc@oss.nxp.com>
Signed-off-by: Chester Lin <redacted>
---

Changes in v4:
- Change the representation of available slew-rate DT values from register
  values to real frequencies.

 .../pinctrl/nxp,s32g2-siul2-pinctrl.yaml      | 123 ++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/nxp,s32g2-siul2-pinctrl.yaml
diff --git a/Documentation/devicetree/bindings/pinctrl/nxp,s32g2-siul2-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/nxp,s32g2-siul2-pinctrl.yaml
new file mode 100644
index 000000000000..d49aafd8c5f4
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/nxp,s32g2-siul2-pinctrl.yaml
@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2022 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/nxp,s32g2-siul2-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP S32G2 pin controller
+
+maintainers:
+  - Ghennadi Procopciuc <Ghennadi.Procopciuc@oss.nxp.com>
+  - Chester Lin <clin@suse.com>
+
+description: |
+  S32G2 pinmux is implemented in SIUL2 (System Integration Unit Lite2),
+  whose memory map is split into two regions:
+    SIUL2_0 @ 0x4009c000
+    SIUL2_1 @ 0x44010000
+
+  Every SIUL2 region has multiple register types, and here only MSCR and
+  IMCR registers need to be revealed for kernel to configure pinmux.
+
+  Please note that some register indexes are reserved in S32G2, such as
+  MSCR102-MSCR111, MSCR123-MSCR143, IMCR84-IMCR118 and IMCR398-IMCR429.
+
+properties:
+  compatible:
+    enum:
+      - nxp,s32g2-siul2-pinctrl
+
+  reg:
+    description: |
+      A list of MSCR/IMCR register regions to be reserved.
+      - MSCR (Multiplexed Signal Configuration Register)
+        An MSCR register can configure the associated pin as either a GPIO pin
+        or a function output pin depends on the selected signal source.
+      - IMCR (Input Multiplexed Signal Configuration Register)
+        An IMCR register can configure the associated pin as function input
+        pin depends on the selected signal source.
+    items:
+      - description: MSCR registers group 0 in SIUL2_0
+      - description: MSCR registers group 1 in SIUL2_1
+      - description: MSCR registers group 2 in SIUL2_1
+      - description: IMCR registers group 0 in SIUL2_0
+      - description: IMCR registers group 1 in SIUL2_1
+      - description: IMCR registers group 2 in SIUL2_1
+
+patternProperties:
+  '-pins$':
+    type: object
+    additionalProperties: false
+
+    patternProperties:
+      '-grp[0-9]$':
+        type: object
+        allOf:
+          - $ref: pinmux-node.yaml#
+          - $ref: pincfg-node.yaml#
+        description: |
+          Pinctrl node's client devices specify pin muxes using subnodes,
+          which in turn use the standard properties below.
+
+        properties:
+          bias-disable: true
+          bias-high-impedance: true
+          bias-pull-up: true
+          bias-pull-down: true
+          drive-open-drain: true
+          input-enable: true
+          output-enable: true
+
+          pinmux:
+            description: |
+              An integer array for representing pinmux configurations of
+              a device. Each integer consists of a PIN_ID and a 4-bit
+              selected signal source(SSS) as IOMUX setting, which is
+              calculated as: pinmux = (PIN_ID << 4 | SSS)
+
+          slew-rate:
+            description: Supported slew rate based on Fmax values (MHz)
+            enum: [83, 133, 150, 166, 208]
+
+        additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    pinctrl@4009c240 {
+        compatible = "nxp,s32g2-siul2-pinctrl";
+
+              /* MSCR0-MSCR101 registers on siul2_0 */
+        reg = <0x4009c240 0x198>,
+              /* MSCR112-MSCR122 registers on siul2_1 */
+              <0x44010400 0x2c>,
+              /* MSCR144-MSCR190 registers on siul2_1 */
+              <0x44010480 0xbc>,
+              /* IMCR0-IMCR83 registers on siul2_0 */
+              <0x4009ca40 0x150>,
+              /* IMCR119-IMCR397 registers on siul2_1 */
+              <0x44010c1c 0x45c>,
+              /* IMCR430-IMCR495 registers on siul2_1 */
+              <0x440110f8 0x108>;
+
+        llce-can0-pins {
+            llce-can0-grp0 {
+                pinmux = <0x2b0>;
+                input-enable;
+                slew-rate = <208>;
+            };
+
+            llce-can0-grp1 {
+                pinmux = <0x2c2>;
+                output-enable;
+                slew-rate = <208>;
+            };
+        };
+    };
+...
-- 
2.37.3
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