| Message ID | 20210414140521.11463-4-a-govindraju@ti.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | CAN TRANSCEIVER: Add support for CAN transceivers | expand |
On 14.04.2021 19:35:18, Aswath Govindraju wrote: > Add binding documentation for TI TCAN104x CAN transceivers. > > Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> > --- > .../bindings/phy/ti,tcan104x-can.yaml | 56 +++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 57 insertions(+) > create mode 100644 Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml > > diff --git a/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml > new file mode 100644 > index 000000000000..4abfc30a97d0 > --- /dev/null > +++ b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml > @@ -0,0 +1,56 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: "http://devicetree.org/schemas/phy/ti,tcan104x-can.yaml#" > +$schema: "http://devicetree.org/meta-schemas/core.yaml#" > + > +title: TCAN104x CAN TRANSCEIVER PHY > + > +maintainers: > + - Aswath Govindraju <a-govindraju@ti.com> > + > +properties: > + $nodename: > + pattern: "^tcan104x-phy" > + > + compatible: > + enum: > + - ti,tcan1042 > + - ti,tcan1043 Can you ensure that the 1042 has only the standby gpio and the 1043 has both? > + > + '#phy-cells': > + const: 0 > + > + standby-gpios: > + description: > + gpio node to toggle standby signal on transceiver > + maxItems: 1 > + > + enable-gpios: > + description: > + gpio node to toggle enable signal on transceiver > + maxItems: 1 > + > + max-bitrate: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: > + max bit rate supported in bps > + minimum: 1 > + > +required: > + - compatible > + - '#phy-cells' > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/gpio/gpio.h> > + > + transceiver1: tcan104x-phy { > + compatible = "ti,tcan1043"; > + #phy-cells = <0>; > + max-bitrate = <5000000>; > + standby-gpios = <&wakeup_gpio1 16 GPIO_ACTIVE_LOW>; > + enable-gpios = <&main_gpio1 67 GPIO_ACTIVE_LOW>; AFAICS the enable gpio is active high. Marc
Hi Marc, On 14/04/21 9:03 pm, Marc Kleine-Budde wrote: > On 14.04.2021 19:35:18, Aswath Govindraju wrote: >> Add binding documentation for TI TCAN104x CAN transceivers. >> >> Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> >> --- >> .../bindings/phy/ti,tcan104x-can.yaml | 56 +++++++++++++++++++ >> MAINTAINERS | 1 + >> 2 files changed, 57 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml >> >> diff --git a/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml >> new file mode 100644 >> index 000000000000..4abfc30a97d0 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml >> @@ -0,0 +1,56 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: "http://devicetree.org/schemas/phy/ti,tcan104x-can.yaml#" >> +$schema: "http://devicetree.org/meta-schemas/core.yaml#" >> + >> +title: TCAN104x CAN TRANSCEIVER PHY >> + >> +maintainers: >> + - Aswath Govindraju <a-govindraju@ti.com> >> + >> +properties: >> + $nodename: >> + pattern: "^tcan104x-phy" >> + >> + compatible: >> + enum: >> + - ti,tcan1042 >> + - ti,tcan1043 > > Can you ensure that the 1042 has only the standby gpio and the 1043 has both? > In the driver, it is the way the flags have been set for ti,tcan1042 and ti,tcan1043. >> + >> + '#phy-cells': >> + const: 0 >> + >> + standby-gpios: >> + description: >> + gpio node to toggle standby signal on transceiver >> + maxItems: 1 >> + >> + enable-gpios: >> + description: >> + gpio node to toggle enable signal on transceiver >> + maxItems: 1 >> + >> + max-bitrate: >> + $ref: /schemas/types.yaml#/definitions/uint32 >> + description: >> + max bit rate supported in bps >> + minimum: 1 >> + >> +required: >> + - compatible >> + - '#phy-cells' >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + #include <dt-bindings/gpio/gpio.h> >> + >> + transceiver1: tcan104x-phy { >> + compatible = "ti,tcan1043"; >> + #phy-cells = <0>; >> + max-bitrate = <5000000>; >> + standby-gpios = <&wakeup_gpio1 16 GPIO_ACTIVE_LOW>; >> + enable-gpios = <&main_gpio1 67 GPIO_ACTIVE_LOW>; > > AFAICS the enable gpio is active high. > I will correct this in the respin. Thanks, Aswath > Marc >
On 15.04.2021 11:57:20, Aswath Govindraju wrote: > Hi Marc, > > On 14/04/21 9:03 pm, Marc Kleine-Budde wrote: > > On 14.04.2021 19:35:18, Aswath Govindraju wrote: > >> Add binding documentation for TI TCAN104x CAN transceivers. > >> > >> Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> > >> --- > >> .../bindings/phy/ti,tcan104x-can.yaml | 56 +++++++++++++++++++ > >> MAINTAINERS | 1 + > >> 2 files changed, 57 insertions(+) > >> create mode 100644 Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml > >> > >> diff --git a/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml > >> new file mode 100644 > >> index 000000000000..4abfc30a97d0 > >> --- /dev/null > >> +++ b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml > >> @@ -0,0 +1,56 @@ > >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > >> +%YAML 1.2 > >> +--- > >> +$id: "http://devicetree.org/schemas/phy/ti,tcan104x-can.yaml#" > >> +$schema: "http://devicetree.org/meta-schemas/core.yaml#" > >> + > >> +title: TCAN104x CAN TRANSCEIVER PHY > >> + > >> +maintainers: > >> + - Aswath Govindraju <a-govindraju@ti.com> Can you create a maintainers entry for this file with your address? > >> + > >> +properties: > >> + $nodename: > >> + pattern: "^tcan104x-phy" > >> + > >> + compatible: > >> + enum: > >> + - ti,tcan1042 > >> + - ti,tcan1043 > > > > Can you ensure that the 1042 has only the standby gpio and the 1043 has both? > > > > In the driver, it is the way the flags have been set for ti,tcan1042 and > ti,tcan1043. I was wondering if we would enforce in the DT the 1042 has exactly one the standby GPIO and the 1043 has exactly the standby and the enable GPIO. On the other hand the HW might have pulled one or the other pin high or low and only one of the pins is connected to a GPIO. > >> + > >> + '#phy-cells': > >> + const: 0 > >> + > >> + standby-gpios: > >> + description: > >> + gpio node to toggle standby signal on transceiver > >> + maxItems: 1 > >> + > >> + enable-gpios: > >> + description: > >> + gpio node to toggle enable signal on transceiver > >> + maxItems: 1 > >> + > >> + max-bitrate: > >> + $ref: /schemas/types.yaml#/definitions/uint32 > >> + description: > >> + max bit rate supported in bps > >> + minimum: 1 > >> + > >> +required: > >> + - compatible > >> + - '#phy-cells' > >> + > >> +additionalProperties: false > >> + > >> +examples: > >> + - | > >> + #include <dt-bindings/gpio/gpio.h> > >> + > >> + transceiver1: tcan104x-phy { > >> + compatible = "ti,tcan1043"; > >> + #phy-cells = <0>; > >> + max-bitrate = <5000000>; > >> + standby-gpios = <&wakeup_gpio1 16 GPIO_ACTIVE_LOW>; > >> + enable-gpios = <&main_gpio1 67 GPIO_ACTIVE_LOW>; > > > > AFAICS the enable gpio is active high. > > > > I will correct this in the respin. Marc
Hi Marc, On 15/04/21 1:08 pm, Marc Kleine-Budde wrote: > On 15.04.2021 11:57:20, Aswath Govindraju wrote: >> Hi Marc, >> >> On 14/04/21 9:03 pm, Marc Kleine-Budde wrote: >>> On 14.04.2021 19:35:18, Aswath Govindraju wrote: >>>> Add binding documentation for TI TCAN104x CAN transceivers. >>>> >>>> Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> >>>> --- >>>> .../bindings/phy/ti,tcan104x-can.yaml | 56 +++++++++++++++++++ >>>> MAINTAINERS | 1 + >>>> 2 files changed, 57 insertions(+) >>>> create mode 100644 Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml >>>> >>>> diff --git a/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml >>>> new file mode 100644 >>>> index 000000000000..4abfc30a97d0 >>>> --- /dev/null >>>> +++ b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml >>>> @@ -0,0 +1,56 @@ >>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >>>> +%YAML 1.2 >>>> +--- >>>> +$id: "http://devicetree.org/schemas/phy/ti,tcan104x-can.yaml#" >>>> +$schema: "http://devicetree.org/meta-schemas/core.yaml#" >>>> + >>>> +title: TCAN104x CAN TRANSCEIVER PHY >>>> + >>>> +maintainers: >>>> + - Aswath Govindraju <a-govindraju@ti.com> > > Can you create a maintainers entry for this file with your address? I don't see this being done for other phy yamls in the Documentation/devicetree/bindings/phy folder. Also, scripts/get_maintainer.pl is giving the names of maintainers after reading the yaml files too. Thanks, Aswath > >>>> + >>>> +properties: >>>> + $nodename: >>>> + pattern: "^tcan104x-phy" >>>> + >>>> + compatible: >>>> + enum: >>>> + - ti,tcan1042 >>>> + - ti,tcan1043 >>> >>> Can you ensure that the 1042 has only the standby gpio and the 1043 has both? >>> >> >> In the driver, it is the way the flags have been set for ti,tcan1042 and >> ti,tcan1043. > > I was wondering if we would enforce in the DT the 1042 has exactly one > the standby GPIO and the 1043 has exactly the standby and the enable > GPIO. > > On the other hand the HW might have pulled one or the other pin high or > low and only one of the pins is connected to a GPIO. > >>>> + >>>> + '#phy-cells': >>>> + const: 0 >>>> + >>>> + standby-gpios: >>>> + description: >>>> + gpio node to toggle standby signal on transceiver >>>> + maxItems: 1 >>>> + >>>> + enable-gpios: >>>> + description: >>>> + gpio node to toggle enable signal on transceiver >>>> + maxItems: 1 >>>> + >>>> + max-bitrate: >>>> + $ref: /schemas/types.yaml#/definitions/uint32 >>>> + description: >>>> + max bit rate supported in bps >>>> + minimum: 1 >>>> + >>>> +required: >>>> + - compatible >>>> + - '#phy-cells' >>>> + >>>> +additionalProperties: false >>>> + >>>> +examples: >>>> + - | >>>> + #include <dt-bindings/gpio/gpio.h> >>>> + >>>> + transceiver1: tcan104x-phy { >>>> + compatible = "ti,tcan1043"; >>>> + #phy-cells = <0>; >>>> + max-bitrate = <5000000>; >>>> + standby-gpios = <&wakeup_gpio1 16 GPIO_ACTIVE_LOW>; >>>> + enable-gpios = <&main_gpio1 67 GPIO_ACTIVE_LOW>; >>> >>> AFAICS the enable gpio is active high. >>> >> >> I will correct this in the respin. > > Marc >
On 15.04.2021 14:41:57, Aswath Govindraju wrote: > >>>> +++ b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml > > Can you create a maintainers entry for this file with your address? > > I don't see this being done for other phy yamls in the > Documentation/devicetree/bindings/phy folder. Also, > scripts/get_maintainer.pl is giving the names of maintainers after > reading the yaml files too. Nice! Clever script. Marc
diff --git a/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml new file mode 100644 index 000000000000..4abfc30a97d0 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/phy/ti,tcan104x-can.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: TCAN104x CAN TRANSCEIVER PHY + +maintainers: + - Aswath Govindraju <a-govindraju@ti.com> + +properties: + $nodename: + pattern: "^tcan104x-phy" + + compatible: + enum: + - ti,tcan1042 + - ti,tcan1043 + + '#phy-cells': + const: 0 + + standby-gpios: + description: + gpio node to toggle standby signal on transceiver + maxItems: 1 + + enable-gpios: + description: + gpio node to toggle enable signal on transceiver + maxItems: 1 + + max-bitrate: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + max bit rate supported in bps + minimum: 1 + +required: + - compatible + - '#phy-cells' + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + + transceiver1: tcan104x-phy { + compatible = "ti,tcan1043"; + #phy-cells = <0>; + max-bitrate = <5000000>; + standby-gpios = <&wakeup_gpio1 16 GPIO_ACTIVE_LOW>; + enable-gpios = <&main_gpio1 67 GPIO_ACTIVE_LOW>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 84ef96a444c3..e666d33af10d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4046,6 +4046,7 @@ W: https://github.com/linux-can T: git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can.git T: git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git F: Documentation/devicetree/bindings/net/can/ +F: Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml F: drivers/net/can/ F: include/linux/can/bittiming.h F: include/linux/can/dev.h
Add binding documentation for TI TCAN104x CAN transceivers. Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> --- .../bindings/phy/ti,tcan104x-can.yaml | 56 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 57 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml