Re: [PATCH 3/4] sound/soc: tegra_max98090: document headphone jack rename

On Thu, Feb 4, 2016 at 8:39 AM, Stephen Warren [off-list ref] wrote:

On 02/03/2016 10:31 PM, Jonathan Tinkham wrote:

quoted

Update device-tree bindings to reflect the rename of the board's
headphone jack.

This looks like an incompatible change to the DT. While you've fixed the DT,
which will fix new installations, old DTs now won't work. This breaks DT
ABI. Any DT change needs to be backwards compatible, i.e. the old name
should still work and be documented as a legacy value.

These values are also present in the UCM config for the boards present
in alsa-lib/conf/ucm/GoogleNyan

It's better not to rely on drivers using a "standard" name, better to
let the UCM file abstract it away.