[PATCH v5 01/10] dt-bindings: soc: fsl: cpm_qe: Add TSA controller

Herve Codina
2023-02-16T13:43:01Z

Add support for the time slot assigner (TSA)
available in some PowerQUICC SoC such as MPC885
or MPC866.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
.../bindings/soc/fsl/cpm_qe/fsl,cpm1-tsa.yaml | 234 ++++++++++++++++++
include/dt-bindings/soc/fsl,tsa.h | 13 +
2 files changed, 247 insertions(+)
create mode 100644 Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,cpm1-tsa.yaml
create mode 100644 include/dt-bindings/soc/fsl,tsa.h

diff --git a/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,cpm1-tsa.yaml b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,cpm1-tsa.yaml
new file mode 100644
index 000000000000..bcd03f89780e
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,cpm1-tsa.yaml
@@ -0,0 +1,234 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/fsl/cpm_qe/fsl,cpm1-tsa.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PowerQUICC CPM Time-slot assigner (TSA) controller
+
+maintainers:
+ - Herve Codina <herve.codina@bootlin.com>
+
+description:
+ The TSA is the time-slot assigner that can be found on some PowerQUICC SoC.
+ Its purpose is to route some TDM time-slots to other internal serial
+ controllers.
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - fsl,mpc885-tsa
+ - fsl,mpc866-tsa
+ - const: fsl,cpm1-tsa
+
+ reg:
+ items:
+ - description: SI (Serial Interface) register base
+ - description: SI RAM base
+
+ reg-names:
+ items:
+ - const: si_regs
+ - const: si_ram
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ '#fsl,serial-cells':
+ $ref: /schemas/types.yaml#/definitions/uint32
+ const: 1
+ description:
+ TSA consumers that use a phandle to TSA need to pass the serial identifier
+ with this phandle (defined in dt-bindings/soc/fsl,tsa.h).
+ For instance "fsl,tsa-serial = <&tsa FSL_CPM_TSA_SCC4>;".
+
+patternProperties:
+ '^tdm@[0-1]$':
+ description:
+ The TDM managed by this controller
+ type: object
+
+ additionalProperties: false
+
+ properties:
+ reg:
+ minimum: 0
+ maximum: 1
+ description:
+ The TDM number for this TDM, 0 for TDMa and 1 for TDMb
+
+ fsl,common-rxtx-pins:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ The hardware can use four dedicated pins for Tx clock, Tx sync, Rx
+ clock and Rx sync or use only two pins, Tx/Rx clock and Tx/Rx sync.
+ Without the 'fsl,common-rxtx-pins' property, the four pins are used.
+ With the 'fsl,common-rxtx-pins' property, two pins are used.
+
+ clocks:
+ minItems: 2
+ items:
+ - description: External clock connected to L1RSYNC pin
+ - description: External clock connected to L1RCLK pin
+ - description: External clock connected to L1TSYNC pin
+ - description: External clock connected to L1TCLK pin
+ clock-names:
+ minItems: 2
+ items:
+ - const: l1rsync
+ - const: l1rclk
+ - const: l1tsync
+ - const: l1tclk
+
+ fsl,diagnostic-mode:
+ $ref: /schemas/types.yaml#/definitions/string
+ enum: [disabled, echo, internal-loopback, control-loopback]
+ default: disabled
+ description: |
+ The diagnostic mode can be used to diagnose some communication issues.
+ It should not be set (or set to 'disabled') when diagnostic is not
+ needed.
+ Diagnostic mode:
+ - disabled:
+ Diagnostic disabled (ie. normal operation)
+ - echo:
+ Automatic echo. Rx data is resent on Tx.
+ - internal-loopback:
+ The TDM transmitter is connected to the receiver. Data appears
+ on Tx pin.
+ - control-loopback:
+ The TDM transmitter is connected to the receiver. The Tx pin is
+ disconnected.
+
+ fsl,rx-frame-sync-delay-bits:
+ enum: [0, 1, 2, 3]
+ default: 0
+ description: |
+ Receive frame sync delay in number of bits.
+ Indicates the delay between the Rx sync and the first bit of the Rx
+ frame. 0 for no bit delay. 1, 2 or 3 for 1, 2 or 3 bits delay.
+
+ fsl,tx-frame-sync-delay-bits:
+ enum: [0, 1, 2, 3]
+ default: 0
+ description: |
+ Transmit frame sync delay in number of bits.
+ Indicates the delay between the Tx sync and the first bit of the Tx
+ frame. 0 for no bit delay. 1, 2 or 3 for 1, 2 or 3 bits delay.
+
+ fsl,clock-falling-edge:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ Data is sent on falling edge of the clock (and received on the rising
+ edge). If 'clock-falling-edge' is not present, data is sent on the
+ rising edge (and received on the falling edge).
+
+ fsl,fsync-rising-edge:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ Frame sync pulses are sampled with the rising edge of the channel
+ clock. If 'fsync-rising-edge' is not present, pulses are sampled with
+ the falling edge.
+
+ fsl,double-speed-clock:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ The channel clock is twice the data rate.
+
+ patternProperties:
+ '^fsl,[rt]x-ts-routes$':
+ $ref: /schemas/types.yaml#/definitions/uint32-matrix
+ description: |
+ A list of tuple that indicates the Tx or Rx time-slots routes.
+ items:
+ items:
+ - description:
+ The number of time-slots
+ minimum: 1
+ maximum: 64
+ - description: |
+ The source (Tx) or destination (Rx) serial interface
+ (dt-bindings/soc/fsl,tsa.h defines these values)
+ - 0: No destination
+ - 1: SCC2
+ - 2: SCC3
+ - 3: SCC4
+ - 4: SMC1
+ - 5: SMC2
+ enum: [0, 1, 2, 3, 4, 5]
+ minItems: 1
+ maxItems: 64
+
+ allOf:
+ # If fsl,common-rxtx-pins is present, only 2 clocks are needed.
+ # Else, the 4 clocks must be present.
+ - if:
+ required:
+ - fsl,common-rxtx-pins
+ then:
+ properties:
+ clocks:
+ maxItems: 2
+ clock-names:
+ maxItems: 2
+ else:
+ properties:
+ clocks:
+ minItems: 4
+ clock-names:
+ minItems: 4
+
+ required:
+ - reg
+ - clocks
+ - clock-names
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - '#address-cells'
+ - '#size-cells'
+ - '#fsl,serial-cells'
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/soc/fsl,tsa.h>
+
+ tsa@ae0 {
+ compatible = "fsl,mpc885-tsa", "fsl,cpm1-tsa";
+ reg = <0xae0 0x10>,
+ <0xc00 0x200>;
+ reg-names = "si_regs", "si_ram";
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ #fsl,serial-cells = <1>;
+
+ tdm@0 {
+ /* TDMa */
+ reg = <0>;
+
+ clocks = <&clk_l1rsynca>, <&clk_l1rclka>;
+ clock-names = "l1rsync", "l1rclk";
+
+ fsl,common-rxtx-pins;
+ fsl,fsync-rising-edge;
+
+ fsl,tx-ts-routes = < 2 0 >, /* TS 0..1 */
+ < 24 FSL_CPM_TSA_SCC4 >, /* TS 2..25 */
+ < 1 0 >, /* TS 26 */
+ < 5 FSL_CPM_TSA_SCC3 >; /* TS 27..31 */
+
+ fsl,rx-ts-routes = < 2 0 >, /* TS 0..1 */
+ < 24 FSL_CPM_TSA_SCC4 >, /* 2..25 */
+ < 1 0 >, /* TS 26 */
+ < 5 FSL_CPM_TSA_SCC3 >; /* TS 27..31 */
+ };
+ };
diff --git a/include/dt-bindings/soc/fsl,tsa.h b/include/dt-bindings/soc/fsl,tsa.h
new file mode 100644
index 000000000000..2cc44e867dbe
--- /dev/null
+++ b/include/dt-bindings/soc/fsl,tsa.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
+
+#ifndef __DT_BINDINGS_SOC_FSL_TSA_H
+#define __DT_BINDINGS_SOC_FSL_TSA_H
+
+#define FSL_CPM_TSA_NU 0 /* Pseuso Cell Id for not used item */
+#define FSL_CPM_TSA_SCC2 1
+#define FSL_CPM_TSA_SCC3 2
+#define FSL_CPM_TSA_SCC4 3
+#define FSL_CPM_TSA_SMC1 4
+#define FSL_CPM_TSA_SMC2 5
+
+#endif
--
2.39.1