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Subject[PATCH 1/6] dt-bindings: phy: phy-stm32-usbphyc: move PLL supplies to parent node
Date
PLL block requires to be powered with 1v1 and 1v8 supplies to catch ENABLE
signal.
Currently, supplies are managed through phy_ops .power_on/off, and PLL
activation/deactivation is managed through phy_ops .init/exit.
The sequence of phy_ops .power_on/.phy_init, .power_off/.exit is USB
drivers dependent.
To ensure a good behavior of the PLL, supplies have to be managed at PLL
activation/deactivation. That means the supplies need to be put in usbphyc
parent node and not in phy children nodes.

Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
---
Note that even with bindings change, it doesn't break the backward
compatibility: old device trees are still compatible, USB is still
functional. Device trees will be updated with this new bindings
when approved.
---
.../bindings/phy/phy-stm32-usbphyc.yaml | 22 +++++++++----------
1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml b/Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml
index 0ba61979b970..46df6786727a 100644
--- a/Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml
+++ b/Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml
@@ -45,6 +45,12 @@ properties:
"#size-cells":
const: 0

+ vdda1v1-supply:
+ description: regulator providing 1V1 power supply to the PLL block
+
+ vdda1v8-supply:
+ description: regulator providing 1V8 power supply to the PLL block
+
#Required child nodes:

patternProperties:
@@ -61,12 +67,6 @@ patternProperties:
phy-supply:
description: regulator providing 3V3 power supply to the PHY.

- vdda1v1-supply:
- description: regulator providing 1V1 power supply to the PLL block
-
- vdda1v8-supply:
- description: regulator providing 1V8 power supply to the PLL block
-
"#phy-cells":
enum: [ 0x0, 0x1 ]

@@ -90,8 +90,6 @@ patternProperties:
required:
- reg
- phy-supply
- - vdda1v1-supply
- - vdda1v8-supply
- "#phy-cells"

additionalProperties: false
@@ -102,6 +100,8 @@ required:
- clocks
- "#address-cells"
- "#size-cells"
+ - vdda1v1-supply
+ - vdda1v8-supply
- usb-phy@0
- usb-phy@1

@@ -116,22 +116,20 @@ examples:
reg = <0x5a006000 0x1000>;
clocks = <&rcc USBPHY_K>;
resets = <&rcc USBPHY_R>;
+ vdda1v1-supply = <&reg11>;
+ vdda1v8-supply = <&reg18>;
#address-cells = <1>;
#size-cells = <0>;

usbphyc_port0: usb-phy@0 {
reg = <0>;
phy-supply = <&vdd_usb>;
- vdda1v1-supply = <&reg11>;
- vdda1v8-supply = <&reg18>;
#phy-cells = <0>;
};

usbphyc_port1: usb-phy@1 {
reg = <1>;
phy-supply = <&vdd_usb>;
- vdda1v1-supply = <&reg11>;
- vdda1v8-supply = <&reg18>;
#phy-cells = <1>;
};
};
--
2.17.1
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