20 Apr
2015
20 Apr
'15
9:14 p.m.
On Mon, Apr 20, 2015 at 01:56:46PM -0700, Kevin Cernekee wrote:
On Thu, Apr 16, 2015 at 5:57 AM, Lars-Peter Clausen lars@metafoo.de wrote:
On 04/15/2015 11:42 PM, Kevin Cernekee wrote:
If you want to make the clock optional use
if (PTR_ERR(priv->mclk) == -ENOENT) return PTR_ERR(priv->mclk);
This makes sure that the case where the clock is specified, but there is a error with the specification (e.g. incorrect DT cells) is handled properly.
Did you mean:
if (PTR_ERR(priv->mclk) != -ENOENT) return PTR_ERR(priv->mclk);
I don't see this in other codec drivers, but I do see the explicit EPROBE_DEFER check in max98090, max98095, pcm512x, and wm8960.
That's the most correct way of writing a check for an optional clock, best practice on this stuff is evolving over time (as is standardization in the clock API).