| Message ID | 1469007629-31757-2-git-send-email-peter.chen@nxp.com |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Wed, Jul 20, 2016 at 05:40:24PM +0800, Peter Chen wrote: > Add binding doc for generic power sequence library. > > Signed-off-by: Peter Chen <peter.chen@nxp.com> > Acked-by: Philipp Zabel <p.zabel@pengutronix.de> > --- > .../bindings/power/pwrseq/pwrseq-generic.txt | 48 ++++++++++++++++++++++ > 1 file changed, 48 insertions(+) > create mode 100644 Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt > > diff --git a/Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt b/Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt > new file mode 100644 > index 0000000..48bb3e1 > --- /dev/null > +++ b/Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt > @@ -0,0 +1,48 @@ > +The generic power sequence library > + > +Some hard-wired devices (eg USB/MMC) need to do power sequence before > +the device can be enumerated on the bus, the typical power sequence > +like: enable USB PHY clock, toggle reset pin, etc. But current > +Linux device driver lacks of such code to do it, it may cause some > +hard-wired devices works abnormal or can't be recognized by > +controller at all. The power sequence will be done before this device > +can be found at the bus. > + > +The power sequence properties is under the device node. > + > +Optional properties: > +- clocks: the input clock for device. > +- reset-gpios: Should specify the GPIO for reset. > +- reset-duration-us: the duration in microsecond for assert reset signal. > + > +Below is the example of USB power sequence properties on USB device > +nodes which have two level USB hubs. > + > +&usbotg1 { > + vbus-supply = <®_usb_otg1_vbus>; > + pinctrl-names = "default"; > + pinctrl-0 = <&pinctrl_usb_otg1_id>; > + status = "okay"; > + > + #address-cells = <1>; > + #size-cells = <0>; > + genesys: hub@1 { > + compatible = "usb5e3,608"; > + reg = <1>; > + > + clocks = <&clks IMX6SX_CLK_CKO>; > + reset-gpios = <&gpio4 5 GPIO_ACTIVE_LOW>; /* hub reset pin */ > + reset-duration-us = <10>; > + > + #address-cells = <1>; > + #size-cells = <0>; > + asix: ethernet@1 { > + compatible = "usbb95,1708"; > + reg = <1>; > + > + clocks = <&clks IMX6SX_CLK_IPG>; > + reset-gpios = <&gpio4 6 GPIO_ACTIVE_LOW>; /* ethernet_rst */ > + reset-duration-us = <15>; > + }; > + }; > +}; > -- > 1.9.1 Rob, would you please help to ack dts changes in this series if you are ok with them?
On Wed, Jul 20, 2016 at 05:40:24PM +0800, Peter Chen wrote: > Add binding doc for generic power sequence library. > > Signed-off-by: Peter Chen <peter.chen@nxp.com> > Acked-by: Philipp Zabel <p.zabel@pengutronix.de> > --- > .../bindings/power/pwrseq/pwrseq-generic.txt | 48 ++++++++++++++++++++++ > 1 file changed, 48 insertions(+) > create mode 100644 Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt Acked-by: Rob Herring <robh@kernel.org> > > diff --git a/Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt b/Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt > new file mode 100644 > index 0000000..48bb3e1 > --- /dev/null > +++ b/Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt > @@ -0,0 +1,48 @@ > +The generic power sequence library > + > +Some hard-wired devices (eg USB/MMC) need to do power sequence before > +the device can be enumerated on the bus, the typical power sequence > +like: enable USB PHY clock, toggle reset pin, etc. But current > +Linux device driver lacks of such code to do it, it may cause some > +hard-wired devices works abnormal or can't be recognized by > +controller at all. The power sequence will be done before this device > +can be found at the bus. > + > +The power sequence properties is under the device node. > + > +Optional properties: > +- clocks: the input clock for device. > +- reset-gpios: Should specify the GPIO for reset. > +- reset-duration-us: the duration in microsecond for assert reset signal. > + > +Below is the example of USB power sequence properties on USB device > +nodes which have two level USB hubs. > + > +&usbotg1 { > + vbus-supply = <®_usb_otg1_vbus>; > + pinctrl-names = "default"; > + pinctrl-0 = <&pinctrl_usb_otg1_id>; > + status = "okay"; > + > + #address-cells = <1>; > + #size-cells = <0>; > + genesys: hub@1 { > + compatible = "usb5e3,608"; > + reg = <1>; > + > + clocks = <&clks IMX6SX_CLK_CKO>; > + reset-gpios = <&gpio4 5 GPIO_ACTIVE_LOW>; /* hub reset pin */ > + reset-duration-us = <10>; > + > + #address-cells = <1>; > + #size-cells = <0>; > + asix: ethernet@1 { > + compatible = "usbb95,1708"; > + reg = <1>; > + > + clocks = <&clks IMX6SX_CLK_IPG>; > + reset-gpios = <&gpio4 6 GPIO_ACTIVE_LOW>; /* ethernet_rst */ > + reset-duration-us = <15>; > + }; > + }; > +}; > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt b/Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt new file mode 100644 index 0000000..48bb3e1 --- /dev/null +++ b/Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt @@ -0,0 +1,48 @@ +The generic power sequence library + +Some hard-wired devices (eg USB/MMC) need to do power sequence before +the device can be enumerated on the bus, the typical power sequence +like: enable USB PHY clock, toggle reset pin, etc. But current +Linux device driver lacks of such code to do it, it may cause some +hard-wired devices works abnormal or can't be recognized by +controller at all. The power sequence will be done before this device +can be found at the bus. + +The power sequence properties is under the device node. + +Optional properties: +- clocks: the input clock for device. +- reset-gpios: Should specify the GPIO for reset. +- reset-duration-us: the duration in microsecond for assert reset signal. + +Below is the example of USB power sequence properties on USB device +nodes which have two level USB hubs. + +&usbotg1 { + vbus-supply = <®_usb_otg1_vbus>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_usb_otg1_id>; + status = "okay"; + + #address-cells = <1>; + #size-cells = <0>; + genesys: hub@1 { + compatible = "usb5e3,608"; + reg = <1>; + + clocks = <&clks IMX6SX_CLK_CKO>; + reset-gpios = <&gpio4 5 GPIO_ACTIVE_LOW>; /* hub reset pin */ + reset-duration-us = <10>; + + #address-cells = <1>; + #size-cells = <0>; + asix: ethernet@1 { + compatible = "usbb95,1708"; + reg = <1>; + + clocks = <&clks IMX6SX_CLK_IPG>; + reset-gpios = <&gpio4 6 GPIO_ACTIVE_LOW>; /* ethernet_rst */ + reset-duration-us = <15>; + }; + }; +};