linux-kernel - Re: [PATCH 1/5] i2c: Convert i2c-octeon.c to use device tree.

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Date:	Wed, 18 Apr 2012 17:16:21 +0200
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	David Daney <david.daney@...ium.com>
Cc:	Rob Herring <robherring2@...il.com>,
	David Daney <ddaney.cavm@...il.com>,
	"linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
	"ralf@...ux-mips.org" <ralf@...ux-mips.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
	"Ben Dooks (embedded platforms)" <ben-linux@...ff.org>,
	"Jean Delvare (PC drivers, core)" <khali@...ux-fr.org>
Subject: Re: [PATCH 1/5] i2c: Convert i2c-octeon.c to use device tree.

> >>-	if (i2c_data == NULL) {
> >>-		dev_err(i2c->dev, "no I2C frequency data\n");
> >>+	/*
> >>+	 * "clock-rate" is a legacy binding, the official binding is
> >>+	 * "clock-frequency".  Try the official one first and then
> >>+	 * fall back if it doesn't exist.
> >>+	 */
> >>+	data = of_get_property(pdev->dev.of_node, "clock-frequency",&len);
> >>+	if (!data || len != sizeof(*data))
> >>+		data = of_get_property(pdev->dev.of_node, "clock-rate",&len);
> >>+	if (data&&  len == sizeof(*data)) {
> >>+		i2c->twsi_freq = be32_to_cpup(data);
> >
> >Can't you use of_property_read_u32?
> 
> I will investigate, and use it if possible.

Any outcome?

And shouldn't the bindings be documented? Or are they only standard and
we hide the legacy one?

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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