linux-kernel - Re: [PATCH v4 2/3] mfd: document DT bindings for Qualcomm SPMI PMICs

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Date:	Wed, 24 Sep 2014 10:14:41 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Stanimir Varbanov <svarbanov@...sol.com>
Cc:	Kumar Gala <galak@...eaurora.org>,
	Stephen Boyd <sboyd@...eaurora.org>,
	David Collins <collinsd@...eaurora.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Grant Likely <grant.likely@...aro.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	Courtney Cavin <courtney.cavin@...ymobile.com>,
	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	Josh Cartwright <joshc@...eaurora.org>
Subject: Re: [PATCH v4 2/3] mfd: document DT bindings for Qualcomm SPMI PMICs

On Mon, 04 Aug 2014, Stanimir Varbanov wrote:
> Kumar, Stephen, David can I have your Acked/Reviewed-by tag for 2/3 and
> if possible for 3/3. The last patch can wait because currently we don't
> have child peripherals. Thanks.

No one seems to have an opinion, negative or otherwise.

Applied, thanks.

> On 08/01/2014 05:30 PM, Stanimir Varbanov wrote:
> > Document DT bindings used to describe the Qualcomm SPMI PMICs.
> > 
> > Signed-off-by: Stanimir Varbanov <svarbanov@...sol.com>
> > ---
> >  .../devicetree/bindings/mfd/qcom,spmi-pmic.txt     |   64 ++++++++++++++++++++
> >  1 files changed, 64 insertions(+), 0 deletions(-)
> >  create mode 100644 Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt
> > new file mode 100644
> > index 0000000..7182b88
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt
> > @@ -0,0 +1,64 @@
> > +          Qualcomm SPMI PMICs multi-function device bindings
> > +
> > +The Qualcomm SPMI series presently includes PM8941, PM8841 and PMA8084
> > +PMICs.  These PMICs use a QPNP scheme through SPMI interface.
> > +QPNP is effectively a partitioning scheme for dividing the SPMI extended
> > +register space up into logical pieces, and set of fixed register
> > +locations/definitions within these regions, with some of these regions
> > +specifically used for interrupt handling.
> > +
> > +The QPNP PMICs are used with the Qualcomm Snapdragon series SoCs, and are
> > +interfaced to the chip via the SPMI (System Power Management Interface) bus.
> > +Support for multiple independent functions are implemented by splitting the
> > +16-bit SPMI slave address space into 256 smaller fixed-size regions, 256 bytes
> > +each. A function can consume one or more of these fixed-size register regions.
> > +
> > +Required properties:
> > +- compatible:      Should contain one of:
> > +                     "qcom,pm8941"
> > +                     "qcom,pm8841"
> > +                     "qcom,pma8084"
> > +                     or generalized "qcom,spmi-pmic".
> > +- reg:             Specifies the SPMI USID slave address for this device.
> > +                   For more information see:
> > +                   Documentation/devicetree/bindings/spmi/spmi.txt
> > +
> > +Required properties for peripheral child nodes:
> > +- compatible:      Should contain "qcom,xxx", where "xxx" is a peripheral name.
> > +
> > +Optional properties for peripheral child nodes:
> > +- interrupts:      Interrupts are specified as a 4-tuple. For more information
> > +                   see:
> > +                   Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
> > +- interrupt-names: Corresponding interrupt name to the interrupts property
> > +
> > +Each child node of SPMI slave id represents a function of the PMIC. In the
> > +example below the rtc device node represents a peripheral of pm8941
> > +SID = 0. The regulator device node represents a peripheral of pm8941 SID = 1.
> > +
> > +Example:
> > +
> > +	spmi {
> > +		compatible = "qcom,spmi-pmic-arb";
> > +
> > +		pm8941@0 {
> > +			compatible = "qcom,pm8941", "qcom,spmi-pmic";
> > +			reg = <0x0 SPMI_USID>;
> > +
> > +			rtc {
> > +				compatible = "qcom,rtc";
> > +				interrupts = <0x0 0x61 0x1 IRQ_TYPE_EDGE_RISING>;
> > +				interrupt-names = "alarm";
> > +			};
> > +		};
> > +
> > +		pm8941@1 {
> > +			compatible = "qcom,pm8941", "qcom,spmi-pmic";
> > +			reg = <0x1 SPMI_USID>;
> > +
> > +			regulator {
> > +				compatible = "qcom,regulator";
> > +				regulator-name = "8941_boost";
> > +			};
> > +		};
> > +	};
> > 
> 
> 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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