On Thu, 2023-04-27 at 09:48 -0500, Rob Herring wrote: > External email : Please do not click links or open attachments until > you have verified the sender or the content. > > > On Wed, Apr 26, 2023 at 01:51:24PM +0800, Trevor Wu wrote: > > Add apll1_d4 to clocks for switching the parent of top_a1sys_hp > > dynamically. On the other hand, "mediatek,infracfg" is included for > > bus > > protection. > > Bus protection? Meaning access controls for the device? If so, > there's a > proposed binding[1] for just that. If that's something Mediatek needs > too, please participate in that discussion. It's easier to define new > common bindings if there is more than one user. > Hi Rob, Bus protection is a function used to prevent from the unexpected glitch during the reset. The suggested reset control flow is listed as below. bus protection on module reset bus protection off I think it is not the same as access control of the device. In addition, no framework or controller was implemented for MTK bus protection. Here, I just make use of the property to get the phandle of infracfg to access the register for bus protection. > > > > Signed-off-by: Trevor Wu <trevor.wu@xxxxxxxxxxxx> > > --- > > .../bindings/sound/mediatek,mt8188-afe.yaml | 12 > > ++++++++++-- > > 1 file changed, 10 insertions(+), 2 deletions(-) > > > > diff --git > > a/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml > > b/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml > > index 82ccb32f08f2..eb58de8c0e68 100644 > > --- a/Documentation/devicetree/bindings/sound/mediatek,mt8188- > > afe.yaml > > +++ b/Documentation/devicetree/bindings/sound/mediatek,mt8188- > > afe.yaml > > @@ -29,6 +29,10 @@ properties: > > $ref: /schemas/types.yaml#/definitions/phandle > > description: The phandle of the mediatek topckgen controller > > > > + mediatek,infracfg: > > + $ref: /schemas/types.yaml#/definitions/phandle > > + description: The phandle of the mediatek infracfg controller > > + > > power-domains: > > maxItems: 1 > > > > @@ -52,6 +56,7 @@ properties: > > - description: mux for i2si1_mck > > - description: mux for i2si2_mck > > - description: audio 26m clock > > + - description: audio pll1 divide 4 > > > > clock-names: > > items: > > @@ -73,6 +78,7 @@ properties: > > - const: i2si1_m_sel > > - const: i2si2_m_sel > > - const: adsp_audio_26m > > + - const: apll1_d4 > > A new required entry may break the ABI. If that's okay, it needs to > be > explained in the commit msg. > It should be OK, because the project is still developing and there is no device tree file for mt8188 upstream. I will add the reason to the message in v4. Sorry, I didn't notice that before. I will review my future work and check if any required property or item should be included to the binding before mt8188 audio device tree upstream. Thanks, Trevor > Rob > > [1] > https://lore.kernel.org/lkml/cover.1668070216.git.oleksii_moisieiev@xxxxxxxx/
