| Message ID | 20211208151230.3695378-8-s.hauer@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/rockchip: RK356x VOP2 support | expand |
Am Mittwoch, 8. Dezember 2021, 16:12:19 CET schrieb Sascha Hauer: > "vpll" is a misnomer. A clock input to a device should be named after > the usage in the device, not after the clock that drives it. On the > rk3568 the same clock is driven by the HPLL. > To fix that, this patch renames the vpll clock to ref clock. The clock > name "vpll" is left for compatibility to old device trees. Can't we just say that the binding only takes the "ref" name, but the code still allows "vpll". I think I remember Rob suggesting something similar in the past. I don't think that we need to keep the binding(-validation) compatible with old devicetrees, but the kernel itself should stay compatible. Heiko > > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> > --- > .../bindings/display/rockchip/rockchip,dw-hdmi.yaml | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml > index 6e09dd2ee05ac..2ab6578033da2 100644 > --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml > +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml > @@ -48,10 +48,14 @@ properties: > - cec > - grf > - vpll > + - ref > - enum: > - grf > - vpll > - - const: vpll > + - ref > + - enum: > + - vpll > + - ref > > ddc-i2c-bus: > $ref: /schemas/types.yaml#/definitions/phandle >
On Sun, Dec 12, 2021 at 11:09:24PM +0100, Heiko Stuebner wrote: > Am Mittwoch, 8. Dezember 2021, 16:12:19 CET schrieb Sascha Hauer: > > "vpll" is a misnomer. A clock input to a device should be named after > > the usage in the device, not after the clock that drives it. On the > > rk3568 the same clock is driven by the HPLL. > > To fix that, this patch renames the vpll clock to ref clock. The clock > > name "vpll" is left for compatibility to old device trees. > > Can't we just say that the binding only takes the "ref" name, but > the code still allows "vpll". > > I think I remember Rob suggesting something similar in the past. > > I don't think that we need to keep the binding(-validation) > compatible with old devicetrees, but the kernel itself should stay > compatible. Sounds reasonable. I'll also add a patch changing the in-tree users next round. Sascha
diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml index 6e09dd2ee05ac..2ab6578033da2 100644 --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml @@ -48,10 +48,14 @@ properties: - cec - grf - vpll + - ref - enum: - grf - vpll - - const: vpll + - ref + - enum: + - vpll + - ref ddc-i2c-bus: $ref: /schemas/types.yaml#/definitions/phandle
"vpll" is a misnomer. A clock input to a device should be named after the usage in the device, not after the clock that drives it. On the rk3568 the same clock is driven by the HPLL. To fix that, this patch renames the vpll clock to ref clock. The clock name "vpll" is left for compatibility to old device trees. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> --- .../bindings/display/rockchip/rockchip,dw-hdmi.yaml | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)