| Message ID | 20200905133230.1014581-3-j.neuschaefer@gmx.net (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Netronix embedded controller driver for Kobo and Tolino ebook readers | expand |
On Sat, Sep 05, 2020 at 03:32:22PM +0200, Jonathan Neuschäfer wrote: > This EC is found in e-book readers of multiple brands (e.g. Kobo, > Tolino), and is typically implemented as a TI MSP430 microcontroller. > > It controls different functions of the system, such as power on/off, > RTC, PWM for the backlight. The exact functionality provided can vary > between boards. > > Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> > --- > v2: > - Add the plaintext DT binding for comparison > > > For reference, here is the binding in text form: > > Netronix Embedded Controller > > This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and > is typically implemented as a TI MSP430 microcontroller. > > > Required properties: > - compatible: should be "netronix,ntxec" > - reg: The I2C address of the EC > > Optional properties: > - system-power-controller: > See Documentation/devicetree/bindings/power/power-controller.txt > - interrupts or interrupts-extended > - interrupt-controller > - #interrupt-cells: Should be 1 > > Optional subnodes: > > Sub-nodes are identified by their compatible string. > > compatible string | description > --------------------------------|-------------------------------------- > netronix,ntxec-pwm | PWM (used for backlight) > netronix,ntxec-rtc | real time clock > > > Example: > > &i2c3 { > pinctrl-names = "default"; > pinctrl-0 = <&pinctrl_i2c3>; > status = "okay"; > > ec: embedded-controller@43 { > pinctrl-names = "default"; > pinctrl-0 = <&pinctrl_ntxec>; > > compatible = "netronix,ntxec"; > reg = <0x43>; > system-power-controller; > interrupt-parent = <&gpio4>; > interrupts = <11 IRQ_TYPE_EDGE_FALLING>; > interrupt-controller; > #interrupt-cells = <1>; > > pwm { > compatible = "netronix,ntxec-pwm"; > #pwm-cells = <2>; > }; > > rtc { > compatible = "netronix,ntxec-rtc"; > interrupts-extended = <&ec 15>; > interrupt-names = "alarm"; > }; > }; > }; > --- > .../bindings/mfd/netronix,ntxec.yaml | 57 +++++++++++++++++++ > 1 file changed, 57 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml > > diff --git a/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml > new file mode 100644 > index 0000000000000..596df460f98eb > --- /dev/null > +++ b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml > @@ -0,0 +1,57 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mfd/netronix,ntxec.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Netronix Embedded Controller > + > +maintainers: > + - Jonathan Neuschäfer <j.neuschaefer@gmx.net> > + > +description: | > + This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and > + is typically implemented as a TI MSP430 microcontroller. > + > + > +properties: > + compatible: > + const: netronix,ntxec > + > + reg: > + items: > + - description: The I2C address of the EC > + > + system-power-controller: > + type: boolean > + description: See Documentation/devicetree/bindings/power/power-controller.txt > + > + interrupts: > + minItems: 1 > + description: > + The EC can signal interrupts via a GPIO line > + > +required: > + - compatible > + - reg additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/irq.h> > + i2c { > + #address-cells = <1>; > + #size-cells = <0>; > + > + ec: embedded-controller@43 { > + pinctrl-names = "default"; > + pinctrl-0 = <&pinctrl_ntxec>; > + > + compatible = "netronix,ntxec"; > + reg = <0x43>; > + system-power-controller; > + interrupt-parent = <&gpio4>; > + interrupts = <11 IRQ_TYPE_EDGE_FALLING>; > + interrupt-controller; > + #interrupt-cells = <1>; These need to be documented too. > + }; > + }; > -- > 2.28.0 >
On Mon, Sep 14, 2020 at 06:50:34PM -0600, Rob Herring wrote: > On Sat, Sep 05, 2020 at 03:32:22PM +0200, Jonathan Neuschäfer wrote: > > This EC is found in e-book readers of multiple brands (e.g. Kobo, > > Tolino), and is typically implemented as a TI MSP430 microcontroller. [...] > > +required: > > + - compatible > > + - reg > > additionalProperties: false Ok, I'll add that. > > + interrupt-controller; > > + #interrupt-cells = <1>; > > These need to be documented too. Interrupt support is something I haven't really worked out yet for this (set of) binding(s). My idea here was to have the embedded-controller node act as an interrupt controller, and the subnodes use specific interrupts that are relevant for their functionality. I think I'll rather omit the interrupt-controller and #interrupt-cells properties now, and add them later if they become necessary. If the pwm and rtc nodes are merged into the main node, I don't think they will become necessary. Thanks, Jonathan Neuschäfer
diff --git a/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml new file mode 100644 index 0000000000000..596df460f98eb --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/netronix,ntxec.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Netronix Embedded Controller + +maintainers: + - Jonathan Neuschäfer <j.neuschaefer@gmx.net> + +description: | + This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and + is typically implemented as a TI MSP430 microcontroller. + + +properties: + compatible: + const: netronix,ntxec + + reg: + items: + - description: The I2C address of the EC + + system-power-controller: + type: boolean + description: See Documentation/devicetree/bindings/power/power-controller.txt + + interrupts: + minItems: 1 + description: + The EC can signal interrupts via a GPIO line + +required: + - compatible + - reg + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + i2c { + #address-cells = <1>; + #size-cells = <0>; + + ec: embedded-controller@43 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_ntxec>; + + compatible = "netronix,ntxec"; + reg = <0x43>; + system-power-controller; + interrupt-parent = <&gpio4>; + interrupts = <11 IRQ_TYPE_EDGE_FALLING>; + interrupt-controller; + #interrupt-cells = <1>; + }; + };
This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and is typically implemented as a TI MSP430 microcontroller. It controls different functions of the system, such as power on/off, RTC, PWM for the backlight. The exact functionality provided can vary between boards. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> --- v2: - Add the plaintext DT binding for comparison For reference, here is the binding in text form: Netronix Embedded Controller This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and is typically implemented as a TI MSP430 microcontroller. Required properties: - compatible: should be "netronix,ntxec" - reg: The I2C address of the EC Optional properties: - system-power-controller: See Documentation/devicetree/bindings/power/power-controller.txt - interrupts or interrupts-extended - interrupt-controller - #interrupt-cells: Should be 1 Optional subnodes: Sub-nodes are identified by their compatible string. compatible string | description --------------------------------|-------------------------------------- netronix,ntxec-pwm | PWM (used for backlight) netronix,ntxec-rtc | real time clock Example: &i2c3 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_i2c3>; status = "okay"; ec: embedded-controller@43 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_ntxec>; compatible = "netronix,ntxec"; reg = <0x43>; system-power-controller; interrupt-parent = <&gpio4>; interrupts = <11 IRQ_TYPE_EDGE_FALLING>; interrupt-controller; #interrupt-cells = <1>; pwm { compatible = "netronix,ntxec-pwm"; #pwm-cells = <2>; }; rtc { compatible = "netronix,ntxec-rtc"; interrupts-extended = <&ec 15>; interrupt-names = "alarm"; }; }; }; --- .../bindings/mfd/netronix,ntxec.yaml | 57 +++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml -- 2.28.0