linux-kernel - Re: [PATCH 1/3] software node: implement reference properties

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Message-ID: <20190906124043.GS2680@smile.fi.intel.com>
Date:   Fri, 6 Sep 2019 15:40:43 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH 1/3] software node: implement reference properties

On Fri, Sep 06, 2019 at 02:17:44PM +0300, Heikki Krogerus wrote:
> On Thu, Sep 05, 2019 at 09:38:07PM -0700, Dmitry Torokhov wrote:
> > It is possible to store references to software nodes in the same fashion as
> > other static properties, so that users do not need to define separate
> > structures:
> > 
> > const struct software_node gpio_bank_b_node = {
> > 	.name = "B",
> > };
> > 
> > const struct property_entry simone_key_enter_props[] __initconst = {
> > 	PROPERTY_ENTRY_U32("linux,code", KEY_ENTER),
> > 	PROPERTY_ENTRY_STRING("label", "enter"),
> > 	PROPERTY_ENTRY_REF("gpios", &gpio_bank_b_node, 123, GPIO_ACTIVE_LOW),
> > 	{ }
> > };
> > 
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> 
> This looks really good to me. I'll wait for Andy's comments on the
> idea, but to me it makes sense.

Idea in general is fine. Though, taking into consideration, for example,
drivers/mfd/intel-lpss-pci.c, the size of predefined structures bumps a lot.
I think we always should keep a pointer. In this case we may not add another
property type.

-- 
With Best Regards,
Andy Shevchenko