| Message ID | 20181122102325.29495-2-wens@csie.org (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 21dd30200e3d350fe420d23a2a00b17633a3d1a2 |
| Headers | show |
| Series | Add support for audiocodec in Allwinner A64 | expand |
On Thu, Nov 22, 2018 at 06:23:18PM +0800, Chen-Yu Tsai wrote: > On the Allwinner A64 SoC, the audio codec has a built-in headphone > amplifier. This amplifier has a power supply separate from the rest of > the analog audio circuitry. > > Add a regulator supply property to handle this. > > Signed-off-by: Chen-Yu Tsai <wens@csie.org> > --- > Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > index 4f8ad0e04d20..056a098495cc 100644 > --- a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > +++ b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > @@ -4,9 +4,11 @@ Required properties: > - compatible: must be one of the following compatibles: > - "allwinner,sun50i-a64-codec-analog" > - reg: must contain the registers location and length > +- cpvdd-supply: Regulator supply for the headphone amplifier I guess we should make this optional, since even if it's missing, it's going to create a dummy regulator. and that allows to have backward compatibility. For the rest of the series, Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Thanks! Maxime
On Thu, Nov 22, 2018 at 11:33 PM Maxime Ripard <maxime.ripard@bootlin.com> wrote: > > On Thu, Nov 22, 2018 at 06:23:18PM +0800, Chen-Yu Tsai wrote: > > On the Allwinner A64 SoC, the audio codec has a built-in headphone > > amplifier. This amplifier has a power supply separate from the rest of > > the analog audio circuitry. > > > > Add a regulator supply property to handle this. > > > > Signed-off-by: Chen-Yu Tsai <wens@csie.org> > > --- > > Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > > index 4f8ad0e04d20..056a098495cc 100644 > > --- a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > > +++ b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > > @@ -4,9 +4,11 @@ Required properties: > > - compatible: must be one of the following compatibles: > > - "allwinner,sun50i-a64-codec-analog" > > - reg: must contain the registers location and length > > +- cpvdd-supply: Regulator supply for the headphone amplifier > > I guess we should make this optional, since even if it's missing, it's > going to create a dummy regulator. and that allows to have backward > compatibility. > > For the rest of the series, > Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> This one (not sun8i-codec-analog) is new for the next release, so there's no backward compatibility to consider. Plus none of the device tree changes for A64 have been merged. ChenYu
On Thu, Nov 22, 2018 at 11:41:57PM +0800, Chen-Yu Tsai wrote: > On Thu, Nov 22, 2018 at 11:33 PM Maxime Ripard > <maxime.ripard@bootlin.com> wrote: > > > > On Thu, Nov 22, 2018 at 06:23:18PM +0800, Chen-Yu Tsai wrote: > > > On the Allwinner A64 SoC, the audio codec has a built-in headphone > > > amplifier. This amplifier has a power supply separate from the rest of > > > the analog audio circuitry. > > > > > > Add a regulator supply property to handle this. > > > > > > Signed-off-by: Chen-Yu Tsai <wens@csie.org> > > > --- > > > Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt | 2 ++ > > > 1 file changed, 2 insertions(+) > > > > > > diff --git a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > > > index 4f8ad0e04d20..056a098495cc 100644 > > > --- a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > > > +++ b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > > > @@ -4,9 +4,11 @@ Required properties: > > > - compatible: must be one of the following compatibles: > > > - "allwinner,sun50i-a64-codec-analog" > > > - reg: must contain the registers location and length > > > +- cpvdd-supply: Regulator supply for the headphone amplifier > > > > I guess we should make this optional, since even if it's missing, it's > > going to create a dummy regulator. and that allows to have backward > > compatibility. > > > > For the rest of the series, > > Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> > > This one (not sun8i-codec-analog) is new for the next release, so there's > no backward compatibility to consider. Plus none of the device tree changes > for A64 have been merged. Ok, that works for me then. Thanks! Maxime
On Thu, Nov 22, 2018 at 11:48 PM Maxime Ripard <maxime.ripard@bootlin.com> wrote: > > On Thu, Nov 22, 2018 at 11:41:57PM +0800, Chen-Yu Tsai wrote: > > On Thu, Nov 22, 2018 at 11:33 PM Maxime Ripard > > <maxime.ripard@bootlin.com> wrote: > > > > > > On Thu, Nov 22, 2018 at 06:23:18PM +0800, Chen-Yu Tsai wrote: > > > > On the Allwinner A64 SoC, the audio codec has a built-in headphone > > > > amplifier. This amplifier has a power supply separate from the rest of > > > > the analog audio circuitry. > > > > > > > > Add a regulator supply property to handle this. > > > > > > > > Signed-off-by: Chen-Yu Tsai <wens@csie.org> > > > > --- > > > > Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt | 2 ++ > > > > 1 file changed, 2 insertions(+) > > > > > > > > diff --git a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > > > > index 4f8ad0e04d20..056a098495cc 100644 > > > > --- a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > > > > +++ b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt > > > > @@ -4,9 +4,11 @@ Required properties: > > > > - compatible: must be one of the following compatibles: > > > > - "allwinner,sun50i-a64-codec-analog" > > > > - reg: must contain the registers location and length > > > > +- cpvdd-supply: Regulator supply for the headphone amplifier > > > > > > I guess we should make this optional, since even if it's missing, it's > > > going to create a dummy regulator. and that allows to have backward > > > compatibility. > > > > > > For the rest of the series, > > > Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> > > > > This one (not sun8i-codec-analog) is new for the next release, so there's > > no backward compatibility to consider. Plus none of the device tree changes > > for A64 have been merged. > > Ok, that works for me then. Well, I misspoke. The driver was introduced in 4.20-rc1, and these changes will end up in 4.21. But again, since we don't have any device tree changes already merged, we should be fine. Implementation wise, there really isn't a "required" variant of the regulator API. The API will use the dummy regulator if it's missing. ChenYu
On Thu, Nov 22, 2018 at 04:32:41PM +0100, Maxime Ripard wrote: > On Thu, Nov 22, 2018 at 06:23:18PM +0800, Chen-Yu Tsai wrote: > > +- cpvdd-supply: Regulator supply for the headphone amplifier > I guess we should make this optional, since even if it's missing, it's > going to create a dummy regulator. and that allows to have backward > compatibility. Regulators should never be marked as optional unless they can be physically absent. It is true that Linux has code to handle partially defined device trees but we shouldn't rely on other OSs having similar code and it's better practice to have board device trees be fully specified, it means that if we need the regulator information for some future thing it's more likely to be there and it's less likely that bugs which do things like cause the regulator to be powered off incorrectly will be introduced in future.
diff --git a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt index 4f8ad0e04d20..056a098495cc 100644 --- a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt +++ b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt @@ -4,9 +4,11 @@ Required properties: - compatible: must be one of the following compatibles: - "allwinner,sun50i-a64-codec-analog" - reg: must contain the registers location and length +- cpvdd-supply: Regulator supply for the headphone amplifier Example: codec_analog: codec-analog@1f015c0 { compatible = "allwinner,sun50i-a64-codec-analog"; reg = <0x01f015c0 0x4>; + cpvdd-supply = <®_eldo1>; };
On the Allwinner A64 SoC, the audio codec has a built-in headphone amplifier. This amplifier has a power supply separate from the rest of the analog audio circuitry. Add a regulator supply property to handle this. Signed-off-by: Chen-Yu Tsai <wens@csie.org> --- Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt | 2 ++ 1 file changed, 2 insertions(+)