[PATCH 1/6] dt-bindings: phy: phy-stm32-usbphyc: move PLL supplies to parent node

Rob Herring robh at kernel.org
Mon Dec 7 17:50:23 EST 2020

On Mon, 23 Nov 2020 18:01:27 +0100, Amelie Delaunay wrote:
> 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 at 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(-)

Reviewed-by: Rob Herring <robh at kernel.org>

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