We're supposed to list the supplies in the dt bindings but there are
none in the eDP PHY bindings.
Looking at the driver in Linux, I can see that there seem to be two
relevant supplies: "vdda-phy" and "vdda-pll". Let's add those to the
bindings.
NOTE: from looking at the Qualcomm datasheet for sc7280, it's not
immediately clear how to figure out how to fill in these supplies. The
only two eDP related supplies are simply described as "power for eDP
0.9V circuits" and "power for eDP 1.2V circuits". From guessing and
from comparing how a similar PHY is hooked up on other similar
Qualcomm boards, I'll make the educated guess that the 1.2V supply
goes to "vdda-phy" and the 0.9V supply goes to "vdda-pll" and I'll use
that in the example here.
Signed-off-by: Douglas Anderson <[email protected]>
---
Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
index a5850ff529f8..cf9e9b8011cb 100644
--- a/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
@@ -41,6 +41,9 @@ properties:
"#phy-cells":
const: 0
+ vdda-phy-supply: true
+ vdda-pll-supply: true
+
required:
- compatible
- reg
@@ -65,5 +68,8 @@ examples:
#clock-cells = <1>;
#phy-cells = <0>;
+
+ vdda-phy-supply = <&vdd_a_edp_0_1p2>;
+ vdda-pll-supply = <&vdd_a_edp_0_0p9>;
};
...
--
2.36.0.rc2.479.g8af0fa9b8e-goog
>We're supposed to list the supplies in the dt bindings but there are none in
>the eDP PHY bindings.
>
>Looking at the driver in Linux, I can see that there seem to be two relevant
>supplies: "vdda-phy" and "vdda-pll". Let's add those to the bindings.
>
>NOTE: from looking at the Qualcomm datasheet for sc7280, it's not
>immediately clear how to figure out how to fill in these supplies. The only two
>eDP related supplies are simply described as "power for eDP 0.9V circuits" and
>"power for eDP 1.2V circuits". From guessing and from comparing how a
>similar PHY is hooked up on other similar Qualcomm boards, I'll make the
>educated guess that the 1.2V supply goes to "vdda-phy" and the 0.9V supply
>goes to "vdda-pll" and I'll use that in the example here.
>
>Signed-off-by: Douglas Anderson <[email protected]>
>---
>
> Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml | 6 ++++++
> 1 file changed, 6 insertions(+)
>
>diff --git a/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
>b/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
>index a5850ff529f8..cf9e9b8011cb 100644
>--- a/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
>+++ b/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
>@@ -41,6 +41,9 @@ properties:
> "#phy-cells":
> const: 0
>
>+ vdda-phy-supply: true
>+ vdda-pll-supply: true
>+
> required:
> - compatible
> - reg
>@@ -65,5 +68,8 @@ examples:
>
> #clock-cells = <1>;
> #phy-cells = <0>;
>+
>+ vdda-phy-supply = <&vdd_a_edp_0_1p2>;
>+ vdda-pll-supply = <&vdd_a_edp_0_0p9>;
> };
> ...
>--
>2.36.0.rc2.479.g8af0fa9b8e-goog
Reviewed-by: Sankeerth Billakanti <[email protected]>
Hi,
On Mon, Apr 25, 2022 at 2:07 PM Douglas Anderson <[email protected]> wrote:
>
> We're supposed to list the supplies in the dt bindings but there are
> none in the eDP PHY bindings.
>
> Looking at the driver in Linux, I can see that there seem to be two
> relevant supplies: "vdda-phy" and "vdda-pll". Let's add those to the
> bindings.
>
> NOTE: from looking at the Qualcomm datasheet for sc7280, it's not
> immediately clear how to figure out how to fill in these supplies. The
> only two eDP related supplies are simply described as "power for eDP
> 0.9V circuits" and "power for eDP 1.2V circuits". From guessing and
> from comparing how a similar PHY is hooked up on other similar
> Qualcomm boards, I'll make the educated guess that the 1.2V supply
> goes to "vdda-phy" and the 0.9V supply goes to "vdda-pll" and I'll use
> that in the example here.
>
> Signed-off-by: Douglas Anderson <[email protected]>
> ---
>
> Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml | 6 ++++++
> 1 file changed, 6 insertions(+)
Even though patch #1 in this series should be dropped, this patch
(patch #2) is still valid. Vinod: I assume this would land in your
tree along with the first two patches in Kuogee's series [1], which
are related. Please let me know if you need me to re-send or anything.
Thanks!
[1] https://lore.kernel.org/r/[email protected]/
-Doug
On 16-06-22, 08:35, Doug Anderson wrote:
> Hi,
>
> On Mon, Apr 25, 2022 at 2:07 PM Douglas Anderson <[email protected]> wrote:
> >
> > We're supposed to list the supplies in the dt bindings but there are
> > none in the eDP PHY bindings.
> >
> > Looking at the driver in Linux, I can see that there seem to be two
> > relevant supplies: "vdda-phy" and "vdda-pll". Let's add those to the
> > bindings.
> >
> > NOTE: from looking at the Qualcomm datasheet for sc7280, it's not
> > immediately clear how to figure out how to fill in these supplies. The
> > only two eDP related supplies are simply described as "power for eDP
> > 0.9V circuits" and "power for eDP 1.2V circuits". From guessing and
> > from comparing how a similar PHY is hooked up on other similar
> > Qualcomm boards, I'll make the educated guess that the 1.2V supply
> > goes to "vdda-phy" and the 0.9V supply goes to "vdda-pll" and I'll use
> > that in the example here.
> >
> > Signed-off-by: Douglas Anderson <[email protected]>
> > ---
> >
> > Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml | 6 ++++++
> > 1 file changed, 6 insertions(+)
>
> Even though patch #1 in this series should be dropped, this patch
> (patch #2) is still valid. Vinod: I assume this would land in your
> tree along with the first two patches in Kuogee's series [1], which
> are related. Please let me know if you need me to re-send or anything.
I have applied this patch, thanks
> [1] https://lore.kernel.org/r/[email protected]/
This needs rebase on phy split which I have picked
--
~Vinod