Re: [PATCH v12 1/7] dt-bindings: net: bluetooth: Add device tree bindings for QTI chip wcn3990

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On Thu, Aug 02, 2018 at 06:55:12PM +0530, Balakrishna Godavarthi wrote:
> This patch enables regulators for the Qualcomm Bluetooth wcn3990
> controller.
> 
> Signed-off-by: Balakrishna Godavarthi <bgodavar@xxxxxxxxxxxxxx>
> Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> ---
>  .../bindings/net/qualcomm-bluetooth.txt       | 26 +++++++++++++++++--
>  1 file changed, 24 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
> index 0ea18a53cc29..2175174415ee 100644
> --- a/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
> +++ b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
> @@ -10,12 +10,22 @@ device the slave device is attached to.
>  Required properties:
>   - compatible: should contain one of the following:
>     * "qcom,qca6174-bt"
> +   * "qcom,wcn3990-bt"
> +
> +Optional properties for compatible string qcom,qca6174-bt:
>  
> -Optional properties:
>   - enable-gpios: gpio specifier used to enable chip
>   - clocks: clock provided to the controller (SUSCLK_32KHZ)
>  
> -Example:
> +Optional properties for compatible string qcom,wcn3990-bt:
> +
> + - vddio-supply: Bluetooth wcn3990 VDD_IO supply regulator handle.
> + - vddxo-supply: Bluetooth wcn3990 VDD_XO supply regulator handle.
> + - vddrf-supply: Bluetooth wcn3990 VDD_RF supply regulator handle.
> + - vddch0-supply: Bluetooth wcn3990 VDD_CH0 supply regulator handle.

Are these really optional? If I understand correctly the driver
expects the regulators to be there. Even if it could do with only some
regulators specified the devm_regulator_bulk_get() call would fail if
not all requested regulators are available.
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