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From:   Saravana Kannan <saravanak@google.com>
Date:   Thu, 27 May 2021 14:04:30 -0700
Message-ID: <CAGETcx9w-gYrPQuxOf9qQDwzyi8Bjp7cf_uK=Q5UcKuH+vWVFw@mail.gmail.com>
Subject: Re: [PATCH] of: property: Add fw_devlink support for pwms
To:     Orson Zhai <orsonzhai@gmail.com>
Cc:     Rob Herring <robh+dt@kernel.org>,
        Frank Rowand <frowand.list@gmail.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
        Orson Zhai <orson.zhai@unisoc.com>
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On Thu, May 27, 2021 at 1:09 AM Orson Zhai <orsonzhai@gmail.com> wrote:
>
> From: Orson Zhai <orson.zhai@unisoc.com>
>
> pwms is often required by backlight in embedded devices. Add device link
> support for pwms as well.
>
> Signed-off-by: Orson Zhai <orson.zhai@unisoc.com>
> ---
>  drivers/of/property.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/of/property.c b/drivers/of/property.c
> index 6c02863..93be977 100644
> --- a/drivers/of/property.c
> +++ b/drivers/of/property.c
> @@ -1287,6 +1287,7 @@ DEFINE_SIMPLE_PROP(pinctrl6, "pinctrl-6", NULL)
>  DEFINE_SIMPLE_PROP(pinctrl7, "pinctrl-7", NULL)
>  DEFINE_SIMPLE_PROP(pinctrl8, "pinctrl-8", NULL)
>  DEFINE_SIMPLE_PROP(remote_endpoint, "remote-endpoint", NULL)
> +DEFINE_SIMPLE_PROP(pwms, "pwms", NULL)
>  DEFINE_SUFFIX_PROP(regulators, "-supply", NULL)
>  DEFINE_SUFFIX_PROP(gpio, "-gpio", "#gpio-cells")
>
> @@ -1371,6 +1372,7 @@ static const struct supplier_bindings of_supplier_bindings[] = {
>         { .parse_prop = parse_pinctrl7, },
>         { .parse_prop = parse_pinctrl8, },
>         { .parse_prop = parse_remote_endpoint, .node_not_dev = true, },
> +       { .parse_prop = parse_pwms, },
>         { .parse_prop = parse_gpio_compat, },
>         { .parse_prop = parse_interrupts, },
>         { .parse_prop = parse_regulators, },

I already have a local patch for this and "reset" bindings. But I'm
holding off on adding support for new properties till fw_devlink=on
fully lands in 5.13. Trying to avoid inadvertently adding new
dependency issues. For example, the remote_endpoint binding I added to
fix one issue caused more dependency issues. So far I've fixed them
all.

So, yeah, temporary Nak for this.

-Saravana