From: robh@kernel.org (Rob Herring)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 1/6] binding-doc: power: pwrseq-generic: add binding doc for generic power sequence library
Date: Fri, 29 Jul 2016 16:09:43 -0500 [thread overview]
Message-ID: <20160729210943.GA2200@rob-hp-laptop> (raw)
In-Reply-To: <1469007629-31757-2-git-send-email-peter.chen@nxp.com>
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 at 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 at 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
>
next prev parent reply other threads:[~2016-07-29 21:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-20 9:40 [PATCH v3 0/6] power: add power sequence library Peter Chen
2016-07-20 9:40 ` [PATCH v3 1/6] binding-doc: power: pwrseq-generic: add binding doc for generic " Peter Chen
2016-07-29 2:09 ` Peter Chen
2016-07-29 21:09 ` Rob Herring [this message]
2016-07-20 9:40 ` [PATCH v3 2/6] power: add " Peter Chen
2016-07-29 20:06 ` [v3,2/6] " Matthias Kaehlcke
2016-08-01 1:58 ` Peter Chen
2016-08-02 3:32 ` Peter Chen
2016-07-20 9:40 ` [PATCH v3 3/6] binding-doc: usb: usb-device: add optional properties for power sequence Peter Chen
2016-07-29 21:11 ` Rob Herring
2016-07-20 9:40 ` [PATCH v3 4/6] usb: core: add power sequence handling for USB devices Peter Chen
2016-07-27 16:25 ` Joshua Clayton
2016-07-28 1:45 ` Peter Chen
2016-07-28 16:18 ` Joshua Clayton
2016-07-20 9:40 ` [PATCH v3 5/6] usb: chipidea: let chipidea core device of_node equal's glue layer device of_node Peter Chen
2016-07-21 9:14 ` Russell King - ARM Linux
2016-07-21 9:20 ` Peter Chen
2016-07-21 9:41 ` Russell King - ARM Linux
2016-07-21 10:12 ` Peter Chen
2016-07-20 9:40 ` [PATCH v3 6/6] ARM: dts: imx6qdl-udoo.dtsi: fix onboard USB HUB property Peter Chen
2016-07-28 15:56 ` [PATCH v3 0/6] power: add power sequence library Joshua Clayton
2016-07-28 16:41 ` Fabio Estevam
2016-08-01 14:55 ` Joshua Clayton
2016-08-01 16:29 ` Fabio Estevam
2016-08-02 1:08 ` Peter Chen
2016-07-29 1:46 ` Peter Chen
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