On Sat, Jun 06, 2020 at 12:44:00AM +0200, Sebastian Reichel wrote: > Add new charge-current-limit feature to gpio-charger. > > Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> > --- > .../bindings/power/supply/gpio-charger.yaml | 31 ++++ > drivers/power/supply/gpio-charger.c | 140 ++++++++++++++++++ > 2 files changed, 171 insertions(+) > > diff --git a/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml b/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml > index 30eabbb14ef3..e11cfdc68a51 100644 > --- a/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml > +++ b/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml > @@ -39,6 +39,25 @@ properties: > maxItems: 1 > description: GPIO indicating the charging status > > + charge-current-limit-gpios: > + minItems: 1 > + maxItems: 32 > + description: GPIOs used for current limiting > + > + charge-current-limit-mapping: > + description: List of touples with current in uA and a GPIO bitmap (in s/touples/tuples/ > + this order). The touples must be provided in descending order of the and here. > + current limit. > + $ref: /schemas/types.yaml#/definitions/uint32-matrix > + items: > + items: > + - description: > + Current limit in uA > + - description: > + Encoded GPIO setting. Bit 0 represents last GPIO from the > + charge-current-limit-gpios property. Bit 1 second to last > + GPIO and so on. Seems a bit odd that bit N doesn't represent index N of the gpios. > + > required: > - compatible > > @@ -47,6 +66,12 @@ anyOf: > - gpios > - required: > - charge-status-gpios > + - required: > + - charge-current-limit-gpios > + > +dependencies: > + charge-current-limit-gpios: [ charge-current-limit-mapping ] > + charge-current-limit-mapping: [ charge-current-limit-gpios ] > > additionalProperties: false > > @@ -60,4 +85,10 @@ examples: > > gpios = <&gpd 28 GPIO_ACTIVE_LOW>; > charge-status-gpios = <&gpc 27 GPIO_ACTIVE_LOW>; > + > + charge-current-limit-gpios = <&gpioA 11 GPIO_ACTIVE_HIGH>, > + <&gpioA 12 GPIO_ACTIVE_HIGH>; > + charge-current-limit-mapping = <2500000 0x00>, // 2.5 A => both GPIOs low > + <700000 0x01>, // 700 mA => GPIO A.12 high > + <0 0x02>; // 0 mA => GPIO A.11 high > };
