From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Jones Subject: Re: [PATCH v10 1/2] mfd: AXP20x: Add bindings documentation Date: Thu, 26 Mar 2015 08:26:17 +0000 Message-ID: <20150326082617.GB5951@x1> References: <1424431168-25157-1-git-send-email-wens@csie.org> <1424431168-25157-2-git-send-email-wens@csie.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <1424431168-25157-2-git-send-email-wens@csie.org> Sender: linux-kernel-owner@vger.kernel.org To: Chen-Yu Tsai Cc: Samuel Ortiz , Mark Brown , Liam Girdwood , Maxime Ripard , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Carlo Caione , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org On Fri, 20 Feb 2015, Chen-Yu Tsai wrote: > From: Carlo Caione >=20 > Bindings documentation for the AXP20x driver. In this file also > sub-nodes are documented. >=20 > Signed-off-by: Carlo Caione > [wens@csie.org: clarify interrupt source for the axp PMIC] > [wens@csie.org: explain dcdc-workmode in detail and trim lines to 80 = chars] > [wens@csie.org: make regulator supplies optional if using unregulated= input] > [wens@csie.org: use cubieboard2 regulator nodes as example] > [wens@csie.org: x-powers,dcdc-workmode default changed to 'current ha= rdware > setting'] > [wens@csie.org: reorganized regulator related properties into separat= e > section.] > Signed-off-by: Chen-Yu Tsai > --- > Documentation/devicetree/bindings/mfd/axp20x.txt | 96 ++++++++++++++= ++++++++++ > 1 file changed, 96 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mfd/axp20x.txt Applied, thanks. > diff --git a/Documentation/devicetree/bindings/mfd/axp20x.txt b/Docum= entation/devicetree/bindings/mfd/axp20x.txt > new file mode 100644 > index 000000000000..98685f291a72 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mfd/axp20x.txt > @@ -0,0 +1,96 @@ > +AXP202/AXP209 device tree bindings > + > +The axp20x family current members : > +axp202 (X-Powers) > +axp209 (X-Powers) > + > +Required properties: > +- compatible: "x-powers,axp202" or "x-powers,axp209" > +- reg: The I2C slave address for the AXP chip > +- interrupt-parent: The parent interrupt controller > +- interrupts: SoC NMI / GPIO interrupt connected to the PMIC's IRQ p= in > +- interrupt-controller: axp20x has its own internal IRQs > +- #interrupt-cells: Should be set to 1 > + > +Optional properties: > +- x-powers,dcdc-freq: defines the work frequency of DC-DC in KHz > + (range: 750-1875). Default: 1.5MHz > +- -supply: a phandle to the regulator supply node. May be omi= tted if > + inputs are unregulated, such as using the IPSOUT output > + from the PMIC. > + > +- regulators: A node that houses a sub-node for each regulator. Regu= lators > + not used but preferred to be managed by the OS should be > + listed as well. > + See Documentation/devicetree/bindings/regulator/regulator.txt > + for more information on standard regulator bindings. > + > +Optional properties for DCDC regulators: > +- x-powers,dcdc-workmode: 1 for PWM mode, 0 for AUTO (PWM/PFM) mode > + Default: Current hardware setting > + The DCDC regulators work in a mixed PWM/PFM mode, > + using PFM under light loads and switching to PWM > + for heavier loads. Forcing PWM mode trades efficiency > + under light loads for lower output noise. This > + probably makes sense for HiFi audio related > + applications that aren't battery constrained. > + > + > +AXP202/AXP209 regulators, type, and corresponding input supply names= : > + > +Regulator Type Supply Name Notes > +--------- ---- ----------- ----- > +DCDC2 : DC-DC buck : vin2-supply > +DCDC3 : DC-DC buck : vin3-supply > +LDO1 : LDO : acin-supply : always on > +LDO2 : LDO : ldo24in-supply : shared supply > +LDO3 : LDO : ldo3in-supply > +LDO4 : LDO : ldo24in-supply : shared supply > +LDO5 : LDO : ldo5in-supply > + > +Example: > + > +axp209: pmic@34 { > + compatible =3D "x-powers,axp209"; > + reg =3D <0x34>; > + interrupt-parent =3D <&nmi_intc>; > + interrupts =3D <0 IRQ_TYPE_LEVEL_LOW>; > + interrupt-controller; > + #interrupt-cells =3D <1>; > + > + regulators { > + x-powers,dcdc-freq =3D <1500>; > + > + vdd_cpu: dcdc2 { > + regulator-always-on; > + regulator-min-microvolt =3D <1000000>; > + regulator-max-microvolt =3D <1450000>; > + regulator-name =3D "vdd-cpu"; > + }; > + > + vdd_int_dll: dcdc3 { > + regulator-always-on; > + regulator-min-microvolt =3D <1000000>; > + regulator-max-microvolt =3D <1400000>; > + regulator-name =3D "vdd-int-dll"; > + }; > + > + vdd_rtc: ldo1 { > + regulator-always-on; > + regulator-min-microvolt =3D <1200000>; > + regulator-max-microvolt =3D <1400000>; > + regulator-name =3D "vdd-rtc"; > + }; > + > + avcc: ldo2 { > + regulator-always-on; > + regulator-min-microvolt =3D <2700000>; > + regulator-max-microvolt =3D <3300000>; > + regulator-name =3D "avcc"; > + }; > + > + ldo3 { > + /* unused but preferred to be managed by OS */ > + }; > + }; > +}; --=20 Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org =E2=94=82 Open source software for ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog