summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/i2c/renesas,rcar-i2c.yaml
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--Documentation/devicetree/bindings/i2c/renesas,rcar-i2c.yaml165
1 files changed, 165 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i2c/renesas,rcar-i2c.yaml b/Documentation/devicetree/bindings/i2c/renesas,rcar-i2c.yaml
new file mode 100644
index 000000000..c4ace5585
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/renesas,rcar-i2c.yaml
@@ -0,0 +1,165 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/renesas,rcar-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car I2C Controller
+
+maintainers:
+ - Wolfram Sang <wsa+renesas@sang-engineering.com>
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - renesas,i2c-r8a7778 # R-Car M1A
+ - renesas,i2c-r8a7779 # R-Car H1
+ - const: renesas,rcar-gen1-i2c # R-Car Gen1
+
+ - items:
+ - enum:
+ - renesas,i2c-r8a7742 # RZ/G1H
+ - renesas,i2c-r8a7743 # RZ/G1M
+ - renesas,i2c-r8a7744 # RZ/G1N
+ - renesas,i2c-r8a7745 # RZ/G1E
+ - renesas,i2c-r8a77470 # RZ/G1C
+ - renesas,i2c-r8a7790 # R-Car H2
+ - renesas,i2c-r8a7791 # R-Car M2-W
+ - renesas,i2c-r8a7792 # R-Car V2H
+ - renesas,i2c-r8a7793 # R-Car M2-N
+ - renesas,i2c-r8a7794 # R-Car E2
+ - const: renesas,rcar-gen2-i2c # R-Car Gen2 and RZ/G1
+
+ - items:
+ - enum:
+ - renesas,i2c-r8a774a1 # RZ/G2M
+ - renesas,i2c-r8a774b1 # RZ/G2N
+ - renesas,i2c-r8a774c0 # RZ/G2E
+ - renesas,i2c-r8a774e1 # RZ/G2H
+ - renesas,i2c-r8a7795 # R-Car H3
+ - renesas,i2c-r8a7796 # R-Car M3-W
+ - renesas,i2c-r8a77961 # R-Car M3-W+
+ - renesas,i2c-r8a77965 # R-Car M3-N
+ - renesas,i2c-r8a77970 # R-Car V3M
+ - renesas,i2c-r8a77980 # R-Car V3H
+ - renesas,i2c-r8a77990 # R-Car E3
+ - renesas,i2c-r8a77995 # R-Car D3
+ - const: renesas,rcar-gen3-i2c # R-Car Gen3 and RZ/G2
+
+ - items:
+ - enum:
+ - renesas,i2c-r8a779a0 # R-Car V3U
+ - renesas,i2c-r8a779f0 # R-Car S4-8
+ - renesas,i2c-r8a779g0 # R-Car V4H
+ - const: renesas,rcar-gen4-i2c # R-Car Gen4
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clock-frequency:
+ description:
+ Desired I2C bus clock frequency in Hz. The absence of this property
+ indicates the default frequency 100 kHz.
+
+ clocks:
+ maxItems: 1
+
+ power-domains:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ dmas:
+ minItems: 2
+ maxItems: 4
+ description:
+ Must contain a list of pairs of references to DMA specifiers, one for
+ transmission, and one for reception.
+
+ dma-names:
+ minItems: 2
+ maxItems: 4
+ items:
+ enum:
+ - tx
+ - rx
+
+ i2c-scl-falling-time-ns:
+ default: 35
+ description:
+ Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C
+ specification.
+
+ i2c-scl-internal-delay-ns:
+ default: 50
+ description:
+ Number of nanoseconds the IP core additionally needs to setup SCL.
+
+ i2c-scl-rising-time-ns:
+ default: 200
+ description:
+ Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C
+ specification.
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - power-domains
+ - '#address-cells'
+ - '#size-cells'
+
+allOf:
+ - $ref: /schemas/i2c/i2c-controller.yaml#
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - renesas,rcar-gen1-i2c
+ - renesas,rcar-gen2-i2c
+ then:
+ properties:
+ dmas: false
+ dma-names: false
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - renesas,rcar-gen2-i2c
+ - renesas,rcar-gen3-i2c
+ - renesas,rcar-gen4-i2c
+ then:
+ required:
+ - resets
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/power/r8a7791-sysc.h>
+
+ i2c0: i2c@e6508000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c";
+ reg = <0xe6508000 0x40>;
+ interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>;
+ clock-frequency = <400000>;
+ clocks = <&cpg CPG_MOD 931>;
+ power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
+ resets = <&cpg 931>;
+ i2c-scl-internal-delay-ns = <6>;
+ };