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0db958b689
The examples template is a 'simple-bus' with a size of 1 cell for had between 2 and 4 cells which really only errors on I2C or SPI type devices with a single cell. The easiest fix in most cases is to change the 'reg' property to 1 cell for address and size. Cc: "Heiko Stübner" <heiko@sntech.de> Cc: Ezequiel Garcia <ezequiel@collabora.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: Miquel Raynal <miquel.raynal@bootlin.com> Cc: Richard Weinberger <richard@nod.at> Cc: "David S. Miller" <davem@davemloft.net> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Vinod Koul <vkoul@kernel.org> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: linux-rockchip@lists.infradead.org Cc: linux-media@vger.kernel.org Cc: linux-mtd@lists.infradead.org Cc: netdev@vger.kernel.org Cc: alsa-devel@alsa-project.org Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org>
144 lines
3.9 KiB
YAML
144 lines
3.9 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/net/ti,k3-am654-cpts.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: The TI AM654x/J721E Common Platform Time Sync (CPTS) module Device Tree Bindings
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maintainers:
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- Grygorii Strashko <grygorii.strashko@ti.com>
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- Sekhar Nori <nsekhar@ti.com>
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description: |+
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The TI AM654x/J721E CPTS module is used to facilitate host control of time
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sync operations.
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Main features of CPTS module are
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- selection of multiple external clock sources
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- Software control of time sync events via interrupt or polling
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- 64-bit timestamp mode in ns with PPM and nudge adjustment.
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- hardware timestamp push inputs (HWx_TS_PUSH)
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- timestamp counter compare output (TS_COMP)
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- timestamp counter bit output (TS_SYNC)
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- periodic Generator function outputs (TS_GENFx)
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- Ethernet Enhanced Scheduled Traffic Operations (CPTS_ESTFn) (TSN)
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- external hardware timestamp push inputs (HWx_TS_PUSH) timestamping
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Depending on integration it enables compliance with the IEEE 1588-2008
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standard for a precision clock synchronization protocol, Ethernet Enhanced
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Scheduled Traffic Operations (CPTS_ESTFn) and PCIe Subsystem Precision Time
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Measurement (PTM).
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TI AM654x/J721E SoCs has several similar CPTS modules integrated into the
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different parts of the system which could be synchronized with each other
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- Main CPTS
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- MCU CPSW CPTS with IEEE 1588-2008 support
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- PCIe subsystem CPTS for PTM support
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Depending on CPTS module integration and when CPTS is integral part of
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another module (MCU CPSW for example) "compatible" and "reg" can
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be omitted - parent module is fully responsible for CPTS enabling and
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configuration.
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properties:
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$nodename:
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pattern: "^cpts@[0-9a-f]+$"
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compatible:
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oneOf:
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- const: ti,am65-cpts
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- const: ti,j721e-cpts
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reg:
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maxItems: 1
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description:
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The physical base address and size of CPTS IO range
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reg-names:
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items:
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- const: cpts
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clocks:
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description: CPTS reference clock
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clock-names:
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items:
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- const: cpts
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interrupts:
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items:
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- description: CPTS events interrupt
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interrupt-names:
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items:
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- const: cpts
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ti,cpts-ext-ts-inputs:
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$ref: /schemas/types.yaml#/definitions/uint32
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maximum: 8
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description:
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Number of hardware timestamp push inputs (HWx_TS_PUSH)
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ti,cpts-periodic-outputs:
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$ref: /schemas/types.yaml#/definitions/uint32
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maximum: 8
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description:
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Number of timestamp Generator function outputs (TS_GENFx)
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refclk-mux:
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type: object
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description: CPTS reference clock multiplexer clock
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properties:
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'#clock-cells':
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const: 0
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clocks:
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maxItems: 8
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assigned-clocks:
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maxItems: 1
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assigned-clocks-parents:
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maxItems: 1
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required:
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- clocks
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- interrupts
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- interrupt-names
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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cpts@310d0000 {
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compatible = "ti,am65-cpts";
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reg = <0x310d0000 0x400>;
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reg-names = "cpts";
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clocks = <&main_cpts_mux>;
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clock-names = "cpts";
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interrupts-extended = <&k3_irq 163 0 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "cpts";
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ti,cpts-periodic-outputs = <6>;
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ti,cpts-ext-ts-inputs = <8>;
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main_cpts_mux: refclk-mux {
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#clock-cells = <0>;
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clocks = <&k3_clks 118 5>, <&k3_clks 118 11>,
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<&k3_clks 157 91>, <&k3_clks 157 77>,
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<&k3_clks 157 102>, <&k3_clks 157 80>,
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<&k3_clks 120 3>, <&k3_clks 121 3>;
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assigned-clocks = <&main_cpts_mux>;
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assigned-clock-parents = <&k3_clks 118 11>;
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};
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};
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