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Message-ID: <979b192d-7011-680e-0e0d-d70519bec2b1@roeck-us.net>
Date: Wed, 23 Nov 2022 07:21:45 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Billy Tsai <billy_tsai@...eedtech.com>, jdelvare@...e.com,
robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
joel@....id.au, andrew@...id.au, lee@...nel.org,
thierry.reding@...il.com, u.kleine-koenig@...gutronix.de,
corbet@....net, p.zabel@...gutronix.de,
linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
linux-pwm@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [v4 3/5] dt-bindings: hwmon: Add bindings for aspeed tach
controller
On 11/22/22 22:16, Billy Tsai wrote:
> Add the aspeed tach device bindings which should be the child-node of
> pwm-tach mfd.
>
> Signed-off-by: Billy Tsai <billy_tsai@...eedtech.com>
> ---
> .../bindings/hwmon/aspeed,ast2600-tach.yaml | 36 +++++++++++++++++++
> 1 file changed, 36 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml
>
> diff --git a/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml b/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml
> new file mode 100644
> index 000000000000..f42114f8e3c2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml
> @@ -0,0 +1,36 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2021 Aspeed, Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/aspeed,ast2600-tach.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Aspeed Ast2600 Tach controller
> +
> +maintainers:
> + - Billy Tsai <billy_tsai@...eedtech.com>
> +
> +description: |
> + The Aspeed Tach controller can support upto 16 fan input.
> + This module is part of the ast2600-pwm-tach multi-function device. For more
> + details see ../mfd/aspeed,ast2600-pwm-tach.yaml.
> +
> +properties:
> + compatible:
> + enum:
> + - aspeed,ast2600-tach
> +patternProperties:
> + "^fan@[a-z0-9]+$":
> + type: object
> + properties:
> + reg:
> + description:
> + The tach channel used for this node.
> + maxItems: 1
> + required:
> + - reg
> +
> +required:
> + - compatible
> +
> +additionalProperties: false
I am not a devicetree expert, but I have to say I find it confusing that
there is no clear explanation that this is for a single fan channel
which is really a child of aspeed,ast2600-tach. An example might be
helpful.
Guenter
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