linux-kernel - Re: [PATCH V2 3/8] dt-bindings: regulator: document stpmic1 pmic regulators

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Message-ID: <20180925212532.GA23630@bogus>
Date:   Tue, 25 Sep 2018 16:25:32 -0500
From:   Rob Herring <robh@...nel.org>
To:     Pascal PAILLET-LME <p.paillet@...com>
Cc:     "dmitry.torokhov@...il.com" <dmitry.torokhov@...il.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "lee.jones@...aro.org" <lee.jones@...aro.org>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "wim@...ux-watchdog.org" <wim@...ux-watchdog.org>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
        "benjamin.gaignard@...aro.org" <benjamin.gaignard@...aro.org>,
        "eballetbo@...il.com" <eballetbo@...il.com>
Subject: Re: [PATCH V2 3/8] dt-bindings: regulator: document stpmic1 pmic
 regulators

On Fri, Sep 07, 2018 at 12:59:44PM +0000, Pascal PAILLET-LME wrote:
> From: pascal paillet <p.paillet@...com>
> 
> The STPMIC1 regulators supply power to the application processor as well as
> to the external system peripherals such as DDR, Flash memories and system
> devices.
> 
> Signed-off-by: pascal paillet <p.paillet@...com>
> ---
> changes in v2:
> * the hardware component has been renamed from stpmu1 to stpmic1 !
> * replace _ with - in properties name
> * remove deprecated regulator-compatible from the example
> Rob, the st,mask_reset name is taken from the data-sheet. I have modified the 
> description. I hope there is no confusion with bit masking know.
> 
>  .../bindings/regulator/st,stpmic1-regulator.txt    | 68 ++++++++++++++++++++++
>  1 file changed, 68 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/regulator/st,stpmic1-regulator.txt
> 
> diff --git a/Documentation/devicetree/bindings/regulator/st,stpmic1-regulator.txt b/Documentation/devicetree/bindings/regulator/st,stpmic1-regulator.txt
> new file mode 100644
> index 0000000..a3f4762
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/regulator/st,stpmic1-regulator.txt
> @@ -0,0 +1,68 @@
> +STMicroelectronics STPMIC1 Voltage regulators
> +
> +Regulator Nodes are optional depending on needs.
> +
> +Available Regulators in STPMIC1 device are:
> +  - buck1 for Buck BUCK1
> +  - buck2 for Buck BUCK2
> +  - buck3 for Buck BUCK3
> +  - buck4 for Buck BUCK4
> +  - ldo1 for LDO LDO1
> +  - ldo2 for LDO LDO2
> +  - ldo3 for LDO LDO3
> +  - ldo4 for LDO LDO4
> +  - ldo5 for LDO LDO5
> +  - ldo6 for LDO LDO6
> +  - vref_ddr for LDO Vref DDR
> +  - boost for Buck BOOST
> +  - pwr_sw1 for VBUS_OTG switch
> +  - pwr_sw2 for SW_OUT switch
> +
> +Switches are fixed voltage regulators with only enable/disable capability.
> +
> +Optional properties:
> +- st,mask-reset: mask reset for this regulator: the regulator configuration
> +  is maintained during pmic reset.

State this is boolean.

> +- regulator-pull-down: enable high pull down
> +  if not specified light pull down is used
> +- regulator-over-current-protection:
> +    if set, all regulators are switched off in case of over-current detection
> +    on this regulator,
> +    if not set, the driver only sends an over-current event.
> +- interrupt-parent: phandle to the parent interrupt controller

This is implied. And actually not needed as the parent node is an 
'interrupt-controller'.

> +- interrupts: index of current limit detection interrupt
> +- <regulator>-supply: phandle to the parent supply/regulator node
> +	each regulator supply can be described except vref_ddr.
> +
> +Example:
> +regulators {
> +	compatible = "st,stpmic1-regulators";
> +
> +	ldo6-supply = <&v3v3>;
> +
> +	vdd_core: buck1 {
> +		regulator-name = "vdd_core";
> +		interrupts = <IT_CURLIM_BUCK1 0>;
> +		interrupt-parent = <&pmic>;
> +		st,mask-reset;
> +		regulator-pull-down;
> +		regulator-min-microvolt = <700000>;
> +		regulator-max-microvolt = <1200000>;
> +	};
> +
> +	v3v3: buck4 {
> +		regulator-name = "v3v3";
> +		interrupts = <IT_CURLIM_BUCK4 0>;
> +		interrupt-parent = <&mypmic>;

Different parent from buck1?
> +
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +	};
> +
> +	v1v8: ldo6 {
> +		regulator-name = "v1v8";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		regulator-over-current-protection;
> +	};
> +};
> -- 
> 1.9.1