[PATCH 1/2] dt-bindings: ptp: Convert ptp-qoirq to yaml format
From: Frank Li
Date: Fri Jun 14 2024 - 16:34:26 EST
Convert ptp-qoirq from txt to yaml format.
Additional change:
- Fixed example interrupts proptery to match the least 2 interrupts
requirement.
- Move Reference clock context under clk,sel.
- Interrupts is not required property
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
.../devicetree/bindings/ptp/ptp-qoriq.txt | 87 ------------
.../devicetree/bindings/ptp/ptp-qoriq.yaml | 148 +++++++++++++++++++++
2 files changed, 148 insertions(+), 87 deletions(-)
diff --git a/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt b/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
deleted file mode 100644
index 743eda754e65c..0000000000000
--- a/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
+++ /dev/null
@@ -1,87 +0,0 @@
-* Freescale QorIQ 1588 timer based PTP clock
-
-General Properties:
-
- - compatible Should be "fsl,etsec-ptp" for eTSEC
- Should be "fsl,fman-ptp-timer" for DPAA FMan
- Should be "fsl,dpaa2-ptp" for DPAA2
- Should be "fsl,enetc-ptp" for ENETC
- - reg Offset and length of the register set for the device
- - interrupts There should be at least two interrupts. Some devices
- have as many as four PTP related interrupts.
-
-Clock Properties:
-
- - fsl,cksel Timer reference clock source.
- - fsl,tclk-period Timer reference clock period in nanoseconds.
- - fsl,tmr-prsc Prescaler, divides the output clock.
- - fsl,tmr-add Frequency compensation value.
- - fsl,tmr-fiper1 Fixed interval period pulse generator.
- - fsl,tmr-fiper2 Fixed interval period pulse generator.
- - fsl,tmr-fiper3 Fixed interval period pulse generator.
- Supported only on DPAA2 and ENETC hardware.
- - fsl,max-adj Maximum frequency adjustment in parts per billion.
- - fsl,extts-fifo The presence of this property indicates hardware
- support for the external trigger stamp FIFO.
- - little-endian The presence of this property indicates the 1588 timer
- IP block is little-endian mode. The default endian mode
- is big-endian.
-
- These properties set the operational parameters for the PTP
- clock. You must choose these carefully for the clock to work right.
- Here is how to figure good values:
-
- TimerOsc = selected reference clock MHz
- tclk_period = desired clock period nanoseconds
- NominalFreq = 1000 / tclk_period MHz
- FreqDivRatio = TimerOsc / NominalFreq (must be greater that 1.0)
- tmr_add = ceil(2^32 / FreqDivRatio)
- OutputClock = NominalFreq / tmr_prsc MHz
- PulseWidth = 1 / OutputClock microseconds
- FiperFreq1 = desired frequency in Hz
- FiperDiv1 = 1000000 * OutputClock / FiperFreq1
- tmr_fiper1 = tmr_prsc * tclk_period * FiperDiv1 - tclk_period
- max_adj = 1000000000 * (FreqDivRatio - 1.0) - 1
-
- The calculation for tmr_fiper2 is the same as for tmr_fiper1. The
- driver expects that tmr_fiper1 will be correctly set to produce a 1
- Pulse Per Second (PPS) signal, since this will be offered to the PPS
- subsystem to synchronize the Linux clock.
-
- Reference clock source is determined by the value, which is holded
- in CKSEL bits in TMR_CTRL register. "fsl,cksel" property keeps the
- value, which will be directly written in those bits, that is why,
- according to reference manual, the next clock sources can be used:
-
- For eTSEC,
- <0> - external high precision timer reference clock (TSEC_TMR_CLK
- input is used for this purpose);
- <1> - eTSEC system clock;
- <2> - eTSEC1 transmit clock;
- <3> - RTC clock input.
-
- For DPAA FMan,
- <0> - external high precision timer reference clock (TMR_1588_CLK)
- <1> - MAC system clock (1/2 FMan clock)
- <2> - reserved
- <3> - RTC clock oscillator
-
- When this attribute is not used, the IEEE 1588 timer reference clock
- will use the eTSEC system clock (for Gianfar) or the MAC system
- clock (for DPAA).
-
-Example:
-
- ptp_clock@24e00 {
- compatible = "fsl,etsec-ptp";
- reg = <0x24E00 0xB0>;
- interrupts = <12 0x8 13 0x8>;
- interrupt-parent = < &ipic >;
- fsl,cksel = <1>;
- fsl,tclk-period = <10>;
- fsl,tmr-prsc = <100>;
- fsl,tmr-add = <0x999999A4>;
- fsl,tmr-fiper1 = <0x3B9AC9F6>;
- fsl,tmr-fiper2 = <0x00018696>;
- fsl,max-adj = <659999998>;
- };
diff --git a/Documentation/devicetree/bindings/ptp/ptp-qoriq.yaml b/Documentation/devicetree/bindings/ptp/ptp-qoriq.yaml
new file mode 100644
index 0000000000000..585e8bffd90c9
--- /dev/null
+++ b/Documentation/devicetree/bindings/ptp/ptp-qoriq.yaml
@@ -0,0 +1,148 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ptp/ptp-qoriq.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale QorIQ 1588 timer based PTP clock
+
+maintainers:
+ - Frank Li <Frank.Li@xxxxxxx>
+
+properties:
+ compatible:
+ enum:
+ - fsl,etsec-ptp
+ - fsl,fman-ptp-timer
+ - fsl,dpaa2-ptp
+ - fsl,enetc-ptp
+ description: |
+ Should be "fsl,etsec-ptp" for eTSEC
+ Should be "fsl,fman-ptp-timer" for DPAA FMan
+ Should be "fsl,dpaa2-ptp" for DPAA2
+ Should be "fsl,enetc-ptp" for ENETC
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 2
+ maxItems: 4
+
+ clocks:
+ maxItems: 1
+
+ fsl,cksel:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Timer reference clock source.
+
+ Reference clock source is determined by the value, which is holded
+ in CKSEL bits in TMR_CTRL register. "fsl,cksel" property keeps the
+ value, which will be directly written in those bits, that is why,
+ according to reference manual, the next clock sources can be used:
+
+ For eTSEC,
+ <0> - external high precision timer reference clock (TSEC_TMR_CLK
+ input is used for this purpose);
+ <1> - eTSEC system clock;
+ <2> - eTSEC1 transmit clock;
+ <3> - RTC clock input.
+
+ For DPAA FMan,
+ <0> - external high precision timer reference clock (TMR_1588_CLK)
+ <1> - MAC system clock (1/2 FMan clock)
+ <2> - reserved
+ <3> - RTC clock oscillator
+
+ fsl,tclk-period:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Timer reference clock period in nanoseconds.
+
+ fsl,tmr-prsc:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Prescaler, divides the output clock.
+
+ fsl,tmr-add:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Frequency compensation value.
+
+ fsl,tmr-fiper1:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Fixed interval period pulse generator.
+
+ fsl,tmr-fiper2:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Fixed interval period pulse generator.
+
+ fsl,tmr-fiper3:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Fixed interval period pulse generator.
+ Supported only on DPAA2 and ENETC hardware.
+
+ fsl,max-adj:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Maximum frequency adjustment in parts per billion.
+
+ These properties set the operational parameters for the PTP
+ clock. You must choose these carefully for the clock to work right.
+ Here is how to figure good values:
+
+ TimerOsc = selected reference clock MHz
+ tclk_period = desired clock period nanoseconds
+ NominalFreq = 1000 / tclk_period MHz
+ FreqDivRatio = TimerOsc / NominalFreq (must be greater that 1.0)
+ tmr_add = ceil(2^32 / FreqDivRatio)
+ OutputClock = NominalFreq / tmr_prsc MHz
+ PulseWidth = 1 / OutputClock microseconds
+ FiperFreq1 = desired frequency in Hz
+ FiperDiv1 = 1000000 * OutputClock / FiperFreq1
+ tmr_fiper1 = tmr_prsc * tclk_period * FiperDiv1 - tclk_period
+ max_adj = 1000000000 * (FreqDivRatio - 1.0) - 1
+
+ The calculation for tmr_fiper2 is the same as for tmr_fiper1. The
+ driver expects that tmr_fiper1 will be correctly set to produce a 1
+ Pulse Per Second (PPS) signal, since this will be offered to the PPS
+ subsystem to synchronize the Linux clock.
+
+ When this attribute is not used, the IEEE 1588 timer reference clock
+ will use the eTSEC system clock (for Gianfar) or the MAC system
+ clock (for DPAA).
+
+ fsl,extts-fifo:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ The presence of this property indicates hardware
+ support for the external trigger stamp FIFO
+
+ little-endian:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ The presence of this property indicates the 1588 timer
+ support for the external trigger stamp FIFO.
+ IP block is little-endian mode. The default endian mode
+ is big-endian.
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ ptp_clock@24e00 {
+ compatible = "fsl,etsec-ptp";
+ reg = <0x24E00 0xB0>;
+ interrupts = <12 0x8>, <13 0x8>;
+ interrupt-parent = <&ipic>;
+ fsl,cksel = <1>;
+ fsl,tclk-period = <10>;
+ fsl,tmr-prsc = <100>;
+ fsl,tmr-add = <0x999999A4>;
+ fsl,tmr-fiper1 = <0x3B9AC9F6>;
+ fsl,tmr-fiper2 = <0x00018696>;
+ fsl,max-adj = <659999998>;
+ };
--
2.34.1