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Date: Fri, 27 Sep 2019 17:06:09 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Rob Herring <robh@...nel.org>
Cc: Bartosz Golaszewski <bgolaszewski@...libre.com>,
Peter Rosin <peda@...ntia.se>,
devicetree <devicetree@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
linux-i2c <linux-i2c@...r.kernel.org>
Subject: Re: [PATCH v4] dt-bindings: at24: convert the binding document to yaml
pt., 27 wrz 2019 o 15:42 Rob Herring <robh@...nel.org> napisał(a):
>
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
>
> Convert the binding document for at24 EEPROMs from txt to yaml. The
> compatible property uses a regex pattern to address all the possible
> combinations of "vendor,model" strings.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> [robh: rework compatible schema, fix missing allOf for $ref, fix errors in example]
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
> v4:
> - Add a $nodename definition
>
> - Turns out the compatible schema is too complex for generating a 'select'
> schema and only a small subset where getting validated. So we need a
> custom 'select' schema. This in turn fixes the issue with the nxp,se97b
> binding.
Thanks again!
>
> Now we get a different set of errors checking Arm dts files (omitting
> a bunch of node name ones):
>
> arch/arm/boot/dts/at91-dvk_som60.dt.yaml: eeprom@57: compatible: ['giantec,gt24c32a', 'atmel,24c32'] is not valid under any of the given schemas
This is because nobody bothered adding 'giantec,gt24c32a' to previous
.txt bindings. I'll add this in a follow-up patch.
> arch/arm/boot/dts/am3874-iceboard.dt.yaml: at24cs01@5f: compatible: ['atmel,24cs01'] is not valid under any of the given schemas
> arch/arm/boot/dts/am3874-iceboard.dt.yaml: at24cs08@5c: compatible: ['atmel,24cs08'] is not valid under any of the given schemas
>
These look fine at first glance, I'm not sure what the problem here
is. I'll take a look at these as soon as I can.
Bart
> These all look to be real.
> ---
> .../devicetree/bindings/eeprom/at24.txt | 90 +---------
> .../devicetree/bindings/eeprom/at24.yaml | 164 ++++++++++++++++++
> MAINTAINERS | 2 +-
> 3 files changed, 166 insertions(+), 90 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/eeprom/at24.yaml
>
> diff --git a/Documentation/devicetree/bindings/eeprom/at24.txt b/Documentation/devicetree/bindings/eeprom/at24.txt
> index 22aead844d0f..c94acbb8cb0c 100644
> --- a/Documentation/devicetree/bindings/eeprom/at24.txt
> +++ b/Documentation/devicetree/bindings/eeprom/at24.txt
> @@ -1,89 +1 @@
> -EEPROMs (I2C)
> -
> -Required properties:
> -
> - - compatible: Must be a "<manufacturer>,<model>" pair. The following <model>
> - values are supported (assuming "atmel" as manufacturer):
> -
> - "atmel,24c00",
> - "atmel,24c01",
> - "atmel,24cs01",
> - "atmel,24c02",
> - "atmel,24cs02",
> - "atmel,24mac402",
> - "atmel,24mac602",
> - "atmel,spd",
> - "atmel,24c04",
> - "atmel,24cs04",
> - "atmel,24c08",
> - "atmel,24cs08",
> - "atmel,24c16",
> - "atmel,24cs16",
> - "atmel,24c32",
> - "atmel,24cs32",
> - "atmel,24c64",
> - "atmel,24cs64",
> - "atmel,24c128",
> - "atmel,24c256",
> - "atmel,24c512",
> - "atmel,24c1024",
> - "atmel,24c2048",
> -
> - If <manufacturer> is not "atmel", then a fallback must be used
> - with the same <model> and "atmel" as manufacturer.
> -
> - Example:
> - compatible = "microchip,24c128", "atmel,24c128";
> -
> - Supported manufacturers are:
> -
> - "catalyst",
> - "microchip",
> - "nxp",
> - "ramtron",
> - "renesas",
> - "rohm",
> - "st",
> -
> - Some vendors use different model names for chips which are just
> - variants of the above. Known such exceptions are listed below:
> -
> - "nxp,se97b" - the fallback is "atmel,24c02",
> - "renesas,r1ex24002" - the fallback is "atmel,24c02"
> - "renesas,r1ex24016" - the fallback is "atmel,24c16"
> - "renesas,r1ex24128" - the fallback is "atmel,24c128"
> - "rohm,br24t01" - the fallback is "atmel,24c01"
> -
> - - reg: The I2C address of the EEPROM.
> -
> -Optional properties:
> -
> - - pagesize: The length of the pagesize for writing. Please consult the
> - manual of your device, that value varies a lot. A wrong value
> - may result in data loss! If not specified, a safety value of
> - '1' is used which will be very slow.
> -
> - - read-only: This parameterless property disables writes to the eeprom.
> -
> - - size: Total eeprom size in bytes.
> -
> - - no-read-rollover: This parameterless property indicates that the
> - multi-address eeprom does not automatically roll over
> - reads to the next slave address. Please consult the
> - manual of your device.
> -
> - - wp-gpios: GPIO to which the write-protect pin of the chip is connected.
> -
> - - address-width: number of address bits (one of 8, 16).
> -
> - - num-addresses: total number of i2c slave addresses this device takes
> -
> -Example:
> -
> -eeprom@52 {
> - compatible = "atmel,24c32";
> - reg = <0x52>;
> - pagesize = <32>;
> - wp-gpios = <&gpio1 3 0>;
> - num-addresses = <8>;
> -};
> +This file has been moved to at24.yaml.
> diff --git a/Documentation/devicetree/bindings/eeprom/at24.yaml b/Documentation/devicetree/bindings/eeprom/at24.yaml
> new file mode 100644
> index 000000000000..036068335a4b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/eeprom/at24.yaml
> @@ -0,0 +1,164 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +# Copyright 2019 BayLibre SAS
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/eeprom/at24.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: I2C EEPROMs compatible with Atmel's AT24
> +
> +maintainers:
> + - Bartosz Golaszewski <bgolaszewski@...libre.com>
> +
> +select:
> + properties:
> + compatible:
> + contains:
> + pattern: "^atmel,(24(c|cs|mac)[0-9]+|spd)$"
> + required:
> + - compatible
> +
> +properties:
> + $nodename:
> + pattern: "^eeprom@[0-9a-f]{1,2}$"
> + compatible:
> + oneOf:
> + - allOf:
> + - minItems: 1
> + maxItems: 2
> + items:
> + - pattern: "^(atmel|catalyst|microchip|nxp|ramtron|renesas|rohm|st),(24(c|cs|mac)[0-9]+|spd)$"
> + - pattern: "^atmel,(24(c|cs|mac)[0-9]+|spd)$"
> + - oneOf:
> + - items:
> + pattern: c00$
> + - items:
> + pattern: c01$
> + - items:
> + pattern: c02$
> + - items:
> + pattern: c04$
> + - items:
> + pattern: c08$
> + - items:
> + pattern: c16$
> + - items:
> + pattern: cs16$
> + - items:
> + pattern: c32$
> + - items:
> + pattern: cs32$
> + - items:
> + pattern: c64$
> + - items:
> + pattern: cs64$
> + - items:
> + pattern: c128$
> + - items:
> + pattern: cs128$
> + - items:
> + pattern: c256$
> + - items:
> + pattern: cs256$
> + - items:
> + pattern: c512$
> + - items:
> + pattern: cs512$
> + - items:
> + pattern: c1024$
> + - items:
> + pattern: cs1024$
> + - items:
> + pattern: c2048$
> + - items:
> + pattern: cs2048$
> + - items:
> + pattern: spd$
> + - items:
> + - const: rohm,br24t01
> + - const: atmel,24c01
> + - items:
> + - const: nxp,se97b
> + - const: atmel,24c02
> + - items:
> + - const: renesas,r1ex24002
> + - const: atmel,24c02
> + - items:
> + - const: renesas,r1ex24016
> + - const: atmel,24c16
> + - items:
> + - const: renesas,r1ex24128
> + - const: atmel,24c128
> +
> + reg:
> + maxItems: 1
> +
> + pagesize:
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + The length of the pagesize for writing. Please consult the
> + manual of your device, that value varies a lot. A wrong value
> + may result in data loss! If not specified, a safety value of
> + '1' is used which will be very slow.
> + enum: [ 1, 8, 16, 32, 64, 128, 258 ]
> + default: 1
> +
> + read-only:
> + $ref: /schemas/types.yaml#definitions/flag
> + description:
> + This parameterless property disables writes to the eeprom.
> +
> + size:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + Total eeprom size in bytes.
> +
> + no-read-rollover:
> + $ref: /schemas/types.yaml#definitions/flag
> + description:
> + This parameterless property indicates that the multi-address
> + eeprom does not automatically roll over reads to the next slave
> + address. Please consult the manual of your device.
> +
> + wp-gpios:
> + description:
> + GPIO to which the write-protect pin of the chip is connected.
> + maxItems: 1
> +
> + address-width:
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + Number of address bits (one of 8, 16).
> + default: 8
> + enum: [ 8, 16 ]
> +
> + num-addresses:
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + Total number of i2c slave addresses this device takes.
> + default: 1
> + minimum: 1
> + maximum: 8
> +
> +required:
> + - compatible
> + - reg
> +
> +examples:
> + - |
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + eeprom@52 {
> + compatible = "microchip,24c32", "atmel,24c32";
> + reg = <0x52>;
> + pagesize = <32>;
> + wp-gpios = <&gpio1 3 0>;
> + num-addresses = <8>;
> + };
> + };
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index a50e97a63bc8..a65e6bcd957b 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -2687,7 +2687,7 @@ M: Bartosz Golaszewski <bgolaszewski@...libre.com>
> L: linux-i2c@...r.kernel.org
> T: git git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
> S: Maintained
> -F: Documentation/devicetree/bindings/eeprom/at24.txt
> +F: Documentation/devicetree/bindings/eeprom/at24.yaml
> F: drivers/misc/eeprom/at24.c
>
> ATA OVER ETHERNET (AOE) DRIVER
> --
> 2.20.1
>
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