On Mon, Oct 21, 2019 at 05:41:15PM +0200, Nuno Sá wrote: > Document the LTC2947 device devicetree bindings. > > Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx> Applied with Rob's Reviewed-by:. Guenter > --- > Changes in v2: > * Add license identifier; > * Fix the uint32-array properties; > * Set maximum at the same indent as allOf in adi,accumulation-deadband-microamp; > * Set enum at the same indent as allOf in adi,gpio-out-pol; > * Use spi instead of spi0 on the example; > > Changes in v3: > * Nothing changed. > > .../bindings/hwmon/adi,ltc2947.yaml | 104 ++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 105 insertions(+) > create mode 100644 Documentation/devicetree/bindings/hwmon/adi,ltc2947.yaml > > diff --git a/Documentation/devicetree/bindings/hwmon/adi,ltc2947.yaml b/Documentation/devicetree/bindings/hwmon/adi,ltc2947.yaml > new file mode 100644 > index 000000000000..ae04903f34bf > --- /dev/null > +++ b/Documentation/devicetree/bindings/hwmon/adi,ltc2947.yaml > @@ -0,0 +1,104 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/bindings/hwmon/adi,ltc2947.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Analog Devices LTC2947 high precision power and energy monitor > + > +maintainers: > + - Nuno Sá <nuno.sa@xxxxxxxxxx> > + > +description: | > + Analog Devices LTC2947 high precision power and energy monitor over SPI or I2C. > + > + https://www.analog.com/media/en/technical-documentation/data-sheets/LTC2947.pdf > + > +properties: > + compatible: > + enum: > + - adi,ltc2947 > + > + reg: > + maxItems: 1 > + > + clocks: > + description: > + The LTC2947 uses either a trimmed internal oscillator or an external clock > + as the time base for determining the integration period to represent time, > + charge and energy. When an external clock is used, this property must be > + set accordingly. > + maxItems: 1 > + > + adi,accumulator-ctl-pol: > + description: > + This property controls the polarity of current that is accumulated to > + calculate charge and energy so that, they can be only accumulated for > + positive current for example. Since there are two sets of registers for > + the accumulated values, this entry can also have two items which sets > + energy1/charge1 and energy2/charger2 respectively. Check table 12 of the > + datasheet for more information on the supported options. > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32-array > + - minItems: 2 > + maxItems: 2 > + items: > + enum: [0, 1, 2, 3] > + default: 0 > + > + adi,accumulation-deadband-microamp: > + description: > + This property controls the Accumulation Dead band which allows to set the > + level of current below which no accumulation takes place. > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 > + maximum: 255 > + default: 0 > + > + adi,gpio-out-pol: > + description: > + This property controls the GPIO polarity. Setting it to one makes the GPIO > + active high, setting it to zero makets it active low. When this property > + is present, the GPIO is automatically configured as output and set to > + control a fan as a function of measured temperature. > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [0, 1] > + default: 0 > + > + adi,gpio-in-accum: > + description: > + When set, this property sets the GPIO as input. It is then used to control > + the accumulation of charge, energy and time. This function can be > + enabled/configured separately for each of the two sets of accumulation > + registers. Check table 13 of the datasheet for more information on the > + supported options. This property cannot be used together with > + adi,gpio-out-pol. > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32-array > + - minItems: 2 > + maxItems: 2 > + items: > + enum: [0, 1, 2] > + default: 0 > + > +required: > + - compatible > + - reg > + > + > +examples: > + - | > + spi { > + #address-cells = <1>; > + #size-cells = <0>; > + > + ltc2947_spi: ltc2947@0 { > + compatible = "adi,ltc2947"; > + reg = <0>; > + /* accumulation takes place always for energ1/charge1. */ > + /* accumulation only on positive current for energy2/charge2. */ > + adi,accumulator-ctl-pol = <0 1>; > + }; > + }; > +... > diff --git a/MAINTAINERS b/MAINTAINERS > index 318332b6a411..e2ba1a182052 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -9638,6 +9638,7 @@ F: drivers/hwmon/ltc2947-core.c > F: drivers/hwmon/ltc2947-spi.c > F: drivers/hwmon/ltc2947-i2c.c > F: drivers/hwmon/ltc2947.h > +F: Documentation/devicetree/bindings/hwmon/adi,ltc2947.yaml > > LTC4306 I2C MULTIPLEXER DRIVER > M: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
