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References: <20201215164315.3666-1-calvin.johnson@oss.nxp.com> <20201215164315.3666-11-calvin.johnson@oss.nxp.com>
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From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Tue, 15 Dec 2020 19:45:16 +0200
Message-ID: <CAHp75Vef7Ln2hwx8BYao3SFxB8U2QTsfxPpxA_jxmujAMFpboA@mail.gmail.com>
Subject: Re: [net-next PATCH v2 10/14] device property: Introduce fwnode_get_id()
To:     Calvin Johnson <calvin.johnson@oss.nxp.com>
Cc:     Grant Likely <grant.likely@arm.com>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Jeremy Linton <jeremy.linton@arm.com>,
        Andrew Lunn <andrew@lunn.ch>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Russell King - ARM Linux admin <linux@armlinux.org.uk>,
        Cristi Sovaiala <cristian.sovaiala@nxp.com>,
        Florin Laurentiu Chiculita <florinlaurentiu.chiculita@nxp.com>,
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        Madalin Bucur <madalin.bucur@oss.nxp.com>,
        Heikki Krogerus <heikki.krogerus@linux.intel.com>,
        Marcin Wojtas <mw@semihalf.com>,
        Pieter Jansen Van Vuuren <pieter.jansenvv@bamboosystems.io>,
        Jon <jon@solid-run.com>, "linux.cj" <linux.cj@gmail.com>,
        Laurentiu Tudor <laurentiu.tudor@nxp.com>,
        Diana Madalina Craciun <diana.craciun@nxp.com>,
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        netdev <netdev@vger.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
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On Tue, Dec 15, 2020 at 6:44 PM Calvin Johnson
<calvin.johnson@oss.nxp.com> wrote:
>
> Using fwnode_get_id(), get the reg property value for DT node
> and get the _ADR object value for ACPI node.

and -> or

...

> +/**
> + * fwnode_get_id - Get the id of a fwnode.
> + * @fwnode: firmware node
> + * @id: id of the fwnode
> + *
> + * Returns 0 on success or a negative errno.
> + */
> +int fwnode_get_id(struct fwnode_handle *fwnode, u32 *id)
> +{
> +       unsigned long long adr;
> +       acpi_status status;
> +
> +       if (is_of_node(fwnode)) {
> +               return of_property_read_u32(to_of_node(fwnode), "reg", id);

ACPI nodes can hold reg property as well. I would rather think about

ret = fwnode_property_read_u32(fwnode, "reg", id)
if (!(ret && is_acpi_node(fwnode)))
  return ret;

> +       } else if (is_acpi_node(fwnode)) {

Redundant 'else'

> +               status = acpi_evaluate_integer(ACPI_HANDLE_FWNODE(fwnode),
> +                                              METHOD_NAME__ADR, NULL, &adr);
> +               if (ACPI_FAILURE(status))
> +                       return -ENODATA;

I'm wondering if it compiles when CONFIG_ACPI=n.

> +               *id = (u32)adr;
> +               return 0;
> +       }

> +       return -EINVAL;
> +}

-- 
With Best Regards,
Andy Shevchenko