linux-kernel - Re: [v9 1/2] dt-bindings: Add bindings for aspeed pwm-tach.

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Date:   Mon, 4 Oct 2021 01:46:01 +0000
From:   Billy Tsai <billy_tsai@...eedtech.com>
To:     Rob Herring <robh@...nel.org>
CC:     "lee.jones@...aro.org" <lee.jones@...aro.org>,
        "joel@....id.au" <joel@....id.au>,
        "andrew@...id.au" <andrew@...id.au>,
        "thierry.reding@...il.com" <thierry.reding@...il.com>,
        "u.kleine-koenig@...gutronix.de" <u.kleine-koenig@...gutronix.de>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-aspeed@...ts.ozlabs.org" <linux-aspeed@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pwm@...r.kernel.org" <linux-pwm@...r.kernel.org>,
        BMC-SW <BMC-SW@...eedtech.com>
Subject: Re: [v9 1/2] dt-bindings: Add bindings for aspeed pwm-tach.

Hi Rob,

On 2021/7/14, 12:02 PM, "Billy Tsai" <billy_tsai@...eedtech.com> wrote:

    On 2021/7/14, 6:14 AM, "Rob Herring" <robh@...nel.org> wrote:

        On Fri, Jul 09, 2021 at 02:52:16PM +0800, Billy Tsai wrote:
        >>> This patch adds device binding for aspeed pwm-tach device which is a
        >>> multi-function device include pwm and tach function and pwm/tach device
        >>> bindings which should be the child-node of pwm-tach device.

        >>I'll say it again, the fan control h/w needs some common bindings for 
        >>describing fans and fan connections to pwm and tach. I'm not going to 
        >>sign off on more fan bindings just doing their own thing.

    > This patch doesn't use to binding the fan control h/w. It is used to binding the two independent h/w blocks.
    > One is used to provide pwm output and another is used to monitor the speed of the input.
    > It is different from "aspeed-pwm-tacho.txt" and "npcm750-pwm-fan.txt" which only focus on fan usage.
    > It is more like the "kontron,sl28cpld.yaml" the device includes a fan monitor and PWM output devices.

Can you give me more suggestions about this patch?

Thanks