linux-kernel - Re: [PATCH v3 07/11] dt-bindings: tegra: Update DFLL binding for PWM regulator

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Message-ID: <c747bc00-8c04-c297-e945-784e45655421@nvidia.com>
Date:   Thu, 8 Mar 2018 23:21:40 +0000
From:   Jon Hunter <jonathanh@...dia.com>
To:     Peter De Schrijver <pdeschrijver@...dia.com>,
        <linux-tegra@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <mturquette@...libre.com>, <sboyd@...eaurora.org>,
        <robh+dt@...nel.org>, <mark.rutland@....com>,
        <devicetree@...r.kernel.org>, <lgirdwood@...il.com>,
        <broonie@...nel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 07/11] dt-bindings: tegra: Update DFLL binding for PWM
 regulator


On 06/02/18 16:34, Peter De Schrijver wrote:
> Add new properties to configure the DFLL PWM regulator support. Also
> add an example and make the I2C clock only required when I2C support is
> used.
> 
> Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com>
> ---
>  .../bindings/clock/nvidia,tegra124-dfll.txt        | 76 +++++++++++++++++++++-
>  1 file changed, 74 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt b/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt
> index dff236f..a4903f7 100644
> --- a/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt
> +++ b/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt
> @@ -23,7 +23,8 @@ Required properties:
>  - clock-names: Must include the following entries:
>    - soc: Clock source for the DFLL control logic.
>    - ref: The closed loop reference clock
> -  - i2c: Clock source for the integrated I2C master.
> +  - i2c: Clock source for the integrated I2C master (only required when
> +	 using I2C mode).
>  - resets: Must contain an entry for each entry in reset-names.
>    See ../reset/reset.txt for details.
>  - reset-names: Must include the following entries:
> @@ -45,10 +46,28 @@ Required properties for the control loop parameters:
>  Optional properties for the control loop parameters:
>  - nvidia,cg-scale: Boolean value, see the field DFLL_PARAMS_CG_SCALE in the TRM.
>  
> +Optional properties for mode selection:
> +- nvidia,pwm-to-pmic: Use PWM to control regulator rather then I2C.
> +

Do we need this property? Seems that we should be able to detect if it
is I2C or PWM based upon the other properties.

Cheers
Jon

-- 
nvpublic