lkml.org 
[lkml]   [2013]   [Nov]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] I2C: BCM2835: Linking platform nodes to adapter nodes
On 11/08/2013 02:49 AM, Florian Meier wrote:
> In order to find I2C devices in the device tree, the platform nodes
> have to be known by the I2C core. Analogous to the i2c-omap driver
> this requires setting the dev.of_node parameter of the adapter.

(CCing the I2C maintainers...)

> diff --git a/drivers/i2c/busses/i2c-bcm2835.c b/drivers/i2c/busses/i2c-bcm2835.c

> @@ -299,6 +299,7 @@ static int bcm2835_i2c_probe(struct platform_device *pdev)
> strlcpy(adap->name, "bcm2835 I2C adapter", sizeof(adap->name));
> adap->algo = &bcm2835_i2c_algo;
> adap->dev.parent = &pdev->dev;
> + adap->dev.of_node = pdev->dev.of_node;

Ah, that makes sense. Thinking about it now, I'd only ever used i2cget
etc. to access I2C devices, rather than instantiating drivers from DT.

That all said, I wonder if the I2C core shouldn't do something like the
following inside i2c_add_adapter():

if (!adap->dev.of_node && adap->dev.parent)
adap->dev.of_node = adap->dev.parent->of_node;

That would save every single I2C driver from having to set up this field
manually.


\
 
 \ /
  Last update: 2013-11-08 18:21    [W:0.083 / U:1.612 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site