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Date: Mon, 21 Jun 2021 15:02:14 +0530
From: Aswath Govindraju <a-govindraju@...com>
To: Rob Herring <robh@...nel.org>
CC: Lokesh Vutla <lokeshvutla@...com>,
Vignesh Raghavendra <vigneshr@...com>,
Kishon Vijay Abraham I <kishon@...com>,
Mark Brown <broonie@...nel.org>, <linux-spi@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] dt-bindings: spi: omap-spi: Convert to json-schema
Hi Rob,
On 19/06/21 2:15 am, Rob Herring wrote:
> On Tue, Jun 08, 2021 at 10:50:09AM +0530, Aswath Govindraju wrote:
>> Convert omap-spi dt-binding documentation from txt to yaml format.
>>
>> Signed-off-by: Aswath Govindraju <a-govindraju@...com>
>> ---
>>
>> changes since v1:
>> - split the series according to their respective trees
>>
>> link to v1:
>> https://lore.kernel.org/patchwork/project/lkml/list/?series=502255
>>
>> .../devicetree/bindings/spi/omap-spi.txt | 48 -------
>> .../devicetree/bindings/spi/omap-spi.yaml | 126 ++++++++++++++++++
>> 2 files changed, 126 insertions(+), 48 deletions(-)
>> delete mode 100644 Documentation/devicetree/bindings/spi/omap-spi.txt
>> create mode 100644 Documentation/devicetree/bindings/spi/omap-spi.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/spi/omap-spi.txt b/Documentation/devicetree/bindings/spi/omap-spi.txt
>> deleted file mode 100644
>> index 487208c256c0..000000000000
>> --- a/Documentation/devicetree/bindings/spi/omap-spi.txt
>> +++ /dev/null
>> @@ -1,48 +0,0 @@
>> -OMAP2+ McSPI device
>> -
>> -Required properties:
>> -- compatible :
>> - - "ti,am654-mcspi" for AM654.
>> - - "ti,omap2-mcspi" for OMAP2 & OMAP3.
>> - - "ti,omap4-mcspi" for OMAP4+.
>> -- ti,spi-num-cs : Number of chipselect supported by the instance.
>> -- ti,hwmods: Name of the hwmod associated to the McSPI
>> -- ti,pindir-d0-out-d1-in: Select the D0 pin as output and D1 as
>> - input. The default is D0 as input and
>> - D1 as output.
>> -
>> -Optional properties:
>> -- dmas: List of DMA specifiers with the controller specific format
>> - as described in the generic DMA client binding. A tx and rx
>> - specifier is required for each chip select.
>> -- dma-names: List of DMA request names. These strings correspond
>> - 1:1 with the DMA specifiers listed in dmas. The string naming
>> - is to be "rxN" and "txN" for RX and TX requests,
>> - respectively, where N equals the chip select number.
>> -
>> -Examples:
>> -
>> -[hwmod populated DMA resources]
>> -
>> -mcspi1: mcspi@1 {
>> - #address-cells = <1>;
>> - #size-cells = <0>;
>> - compatible = "ti,omap4-mcspi";
>> - ti,hwmods = "mcspi1";
>> - ti,spi-num-cs = <4>;
>> -};
>> -
>> -[generic DMA request binding]
>> -
>> -mcspi1: mcspi@1 {
>> - #address-cells = <1>;
>> - #size-cells = <0>;
>> - compatible = "ti,omap4-mcspi";
>> - ti,hwmods = "mcspi1";
>> - ti,spi-num-cs = <2>;
>> - dmas = <&edma 42
>> - &edma 43
>> - &edma 44
>> - &edma 45>;
>> - dma-names = "tx0", "rx0", "tx1", "rx1";
>> -};
>> diff --git a/Documentation/devicetree/bindings/spi/omap-spi.yaml b/Documentation/devicetree/bindings/spi/omap-spi.yaml
>> new file mode 100644
>> index 000000000000..cd20704f2edc
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/spi/omap-spi.yaml
>> @@ -0,0 +1,126 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/spi/omap-spi.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: SPI controller bindings for OMAP and K3 SoCs
>> +
>> +maintainers:
>> + - Mark Brown <broonie@...nel.org>
>
> A TI person here please.
>
Added myself as the reviewer in v3.
Thank you for the review and comments. I have posted a respin(v3) of
this patch after addressing all the comments.
Thanks,
Aswath
> You need a ref to spi-controller.yaml
>
>> +
>> +properties:
>> + compatible:
>> + oneOf:
>> + - items:
>> + - enum:
>> + - ti,am654-mcspi
>> + - ti,am4372-mcspi
>> + - const: ti,omap4-mcspi
>> + - items:
>> + - enum:
>> + - ti,omap2-mcspi
>> + - ti,omap4-mcspi
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + interrupts:
>> + maxItems: 1
>> +
>> + clocks:
>> + maxItems: 1
>> +
>
>> + '#address-cells':
>> + const: 1
>> +
>> + '#size-cells':
>> + const: 0
>
> Don't need these, covered by spi-controller.yaml.
>
>> +
>> + power-domains:
>> + maxItems: 1
>> +
>> + ti,spi-num-cs:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + description: Number of chipselect supported by the instance.
>> + minimum: 1
>> + maximum: 4
>> +
>> + ti,hwmods:
>> + $ref: /schemas/types.yaml#/definitions/string
>> + description:
>> + Must be "mcspi<n>", n being the instance number (1-based).
>> + This property is applicable only on legacy platforms mainly omap2/3
>> + and ti81xx and should not be used on other platforms.
>> + deprecated: true
>> +
>> + ti,pindir-d0-out-d1-in:
>> + description:
>> + Select the D0 pin as output and D1 as input. The default is D0
>> + as input and D1 as output.
>> + type: boolean
>> +
>> + dmas:
>> + description:
>> + List of DMA specifiers with the controller specific format as
>> + described in the generic DMA client binding. A tx and rx
>> + specifier is required for each chip select.
>> + minItems: 1
>> + maxItems: 8
>> +
>> + dma-names:
>> + description:
>> + List of DMA request names. These strings correspond 1:1 with
>> + the DMA sepecifiers listed in dmas. The string names is to be
>> + "rxN" and "txN" for RX and TX requests, respectively. Where N
>> + is the chip select number.
>> + minItems: 1
>> + maxItems: 8
>> +
>> +patternProperties:
>> + "@[0-9a-f]+$":
>> + type: object
>> + description:
>> + Flash devices are defined as a sub-node of the spi controller
>
> Covered by spi-controller.yaml.
>
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - interrupts
>> +
>> +additionalProperties: false
>> +
>> +if:
>> + properties:
>> + compatible:
>> + oneOf:
>> + - const: ti,omap2-mcspi
>> + - const: ti,omap4-mcspi
>> +
>> +then:
>> + properties:
>> + ti,hwmods:
>> + items:
>> + - pattern: "^mcspi([1-9])$"
>> +
>> +else:
>> + properties:
>> + ti,hwmods: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/interrupt-controller/irq.h>
>> + #include <dt-bindings/interrupt-controller/arm-gic.h>
>> + #include <dt-bindings/soc/ti,sci_pm_domain.h>
>> +
>> + main_spi0: spi@...0000 {
>
> Drop unused labels.
>
>> + compatible = "ti,am654-mcspi","ti,omap4-mcspi";
>> + reg = <0x2100000 0x400>;
>> + interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
>> + clocks = <&k3_clks 137 1>;
>> + power-domains = <&k3_pds 137 TI_SCI_PD_EXCLUSIVE>;
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + dmas = <&main_udmap 0xc500>, <&main_udmap 0x4500>;
>> + dma-names = "tx0", "rx0";
>> + };
>> --
>> 2.17.1
>>
>>
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