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Message-ID: <20250127050901.GB3127337-robh@kernel.org>
Date: Sun, 26 Jan 2025 23:09:01 -0600
From: Rob Herring <robh@...nel.org>
To: J. Neuschäfer <j.ne@...teo.net>
Cc: devicetree@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
Scott Wood <oss@...error.net>,
Madhavan Srinivasan <maddy@...ux.ibm.com>,
Michael Ellerman <mpe@...erman.id.au>,
Nicholas Piggin <npiggin@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Naveen N Rao <naveen@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Damien Le Moal <dlemoal@...nel.org>,
Niklas Cassel <cassel@...nel.org>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>, Lee Jones <lee@...nel.org>,
Vinod Koul <vkoul@...nel.org>,
Lorenzo Pieralisi <lpieralisi@...nel.org>,
Krzysztof Wilczyński <kw@...ux.com>,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
J. Neuschäfer <j.neuschaefer@....net>,
Wim Van Sebroeck <wim@...ux-watchdog.org>,
Guenter Roeck <linux@...ck-us.net>, Mark Brown <broonie@...nel.org>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>,
Vignesh Raghavendra <vigneshr@...com>, linux-kernel@...r.kernel.org,
linux-ide@...r.kernel.org, linux-crypto@...r.kernel.org,
dmaengine@...r.kernel.org, linux-pci@...r.kernel.org,
linux-watchdog@...r.kernel.org, linux-spi@...r.kernel.org,
linux-mtd@...ts.infradead.org
Subject: Re: [PATCH 8/9] dt-bindings: spi: Convert Freescale SPI bindings to
YAML
On Sun, Jan 26, 2025 at 07:59:03PM +0100, J. Neuschäfer wrote:
> fsl-spi.txt contains the bindings for the fsl,spi and fsl,espi
> contollers. Convert them to YAML.
>
> Signed-off-by: J. Neuschäfer <j.ne@...teo.net>
> ---
> .../devicetree/bindings/spi/fsl,espi.yaml | 56 +++++++++++++++++
> Documentation/devicetree/bindings/spi/fsl,spi.yaml | 71 ++++++++++++++++++++++
> Documentation/devicetree/bindings/spi/fsl-spi.txt | 62 -------------------
> 3 files changed, 127 insertions(+), 62 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/spi/fsl,espi.yaml b/Documentation/devicetree/bindings/spi/fsl,espi.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..350275760210c5763af0c7b1e1522ccbfb97eec7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/fsl,espi.yaml
> @@ -0,0 +1,56 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/fsl,espi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale eSPI (Enhanced Serial Peripheral Interface) controller
> +
> +maintainers:
> + - J. Neuschäfer <j.ne@...teo.net>
> +
> +properties:
> + compatible:
> + const: fsl,mpc8536-espi
> +
> + reg:
> + maxItems: 1
> +
> + interrupts: true
How many?
> +
> + fsl,espi-num-chipselects:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: The number of the chipselect signals.
Constraints?
> +
> + fsl,csbef:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: Chip select assertion time in bits before frame starts
Constraints?
> +
> + fsl,csaft:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: Chip select negation time in bits after frame ends
Constraints?
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - fsl,espi-num-chipselects
> +
> +allOf:
> + - $ref: spi-controller.yaml#
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + spi@...000 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + compatible = "fsl,mpc8536-espi";
> + reg = <0x110000 0x1000>;
> + interrupts = <53 0x2>;
> + interrupt-parent = <&mpic>;
> + fsl,espi-num-chipselects = <4>;
> + fsl,csbef = <1>;
> + fsl,csaft = <1>;
> + };
> diff --git a/Documentation/devicetree/bindings/spi/fsl,spi.yaml b/Documentation/devicetree/bindings/spi/fsl,spi.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..8efa971b5954a93665cb624345774f2966bb5648
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/fsl,spi.yaml
> @@ -0,0 +1,71 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/fsl,spi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale SPI (Serial Peripheral Interface) controller
> +
> +maintainers:
> + - J. Neuschäfer <j.ne@...teo.net>
> +
> +properties:
> + compatible:
> + enum:
> + - fsl,spi
> + - aeroflexgaisler,spictrl
> +
> + reg:
> + maxItems: 1
> +
> + cell-index:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: |
> + QE SPI subblock index.
> + 0: QE subblock SPI1
> + 1: QE subblock SPI2
> +
> + mode:
> + description: SPI operation mode
> + enum:
> + - cpu
> + - cpu-qe
> +
> + interrupts: true
> +
> + clock-frequency:
> + $ref: /schemas/types.yaml#/definitions/uint32
Don't need a type.
> + description: input clock frequency to non FSL_SOC cores
> +
> + cs-gpios: true
> +
> + fsl,spisel_boot:
> + $ref: /schemas/types.yaml#/definitions/flag
> + description:
> + For the MPC8306 and MPC8309, specifies that the SPISEL_BOOT signal is used
> + as chip select for a slave device. Use reg = <number of gpios> in the
> + corresponding child node, i.e. 0 if the cs-gpios property is not present.
> +
> +required:
> + - compatible
> + - reg
> + - mode
> + - interrupts
> +
> +allOf:
> + - $ref: spi-controller.yaml#
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + spi@4c0 {
> + cell-index = <0>;
> + compatible = "fsl,spi";
> + reg = <0x4c0 0x40>;
> + interrupts = <82 0>;
> + interrupt-parent = <&intc>;
> + mode = "cpu";
> + cs-gpios = <&gpio 18 1 // device reg=<0>
> + &gpio 19 1>; // device reg=<1>
> + };
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