From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Chen Subject: [RFC PATCH 2/2] usb: Example for how to use device node at usb device driver Date: Fri, 8 Jan 2016 13:44:24 +0800 Message-ID: <1452231864-11171-3-git-send-email-peter.chen@freescale.com> References: <1452231864-11171-1-git-send-email-peter.chen@freescale.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1452231864-11171-1-git-send-email-peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org> Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, balbi-l0cyMroinI0@public.gmane.org, arnd-r2nGTMty4D4@public.gmane.org, valentin.longchamp-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org, Peter Chen List-Id: devicetree@vger.kernel.org In this example, we take HUB driver as an example to show how to get properties in USB device driver if this device has device node. Signed-off-by: Peter Chen --- arch/arm/boot/dts/imx6sx-sdb.dtsi | 9 +++++++++ drivers/usb/core/hub.c | 8 ++++++++ 2 files changed, 17 insertions(+) diff --git a/arch/arm/boot/dts/imx6sx-sdb.dtsi b/arch/arm/boot/dts/imx6sx-sdb.dtsi index 94ac400..fe0fd95 100644 --- a/arch/arm/boot/dts/imx6sx-sdb.dtsi +++ b/arch/arm/boot/dts/imx6sx-sdb.dtsi @@ -275,6 +275,15 @@ vbus-supply = <®_usb_otg2_vbus>; dr_mode = "host"; status = "okay"; + + #address-cells = <1>; + #size-cells = <0>; + hub: genesys@01 { + compatible = "05e3,0608"; + reg = <0x01>; + delay-duration-us = <50>; + }; + }; &usdhc2 { diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 4c77001..1babfd4 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include @@ -1748,6 +1749,7 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id) struct usb_device *hdev; struct usb_hub *hub; int ret; + u32 duration_us = 0; desc = intf->cur_altsetting; hdev = interface_to_usbdev(intf); @@ -1873,6 +1875,12 @@ descriptor_error: return ret; } + of_property_read_u32(hdev->dev.of_node, "delay-duration-us", &duration_us); + if (duration_us > 0) { + usleep_range(duration_us, duration_us + 10); + dev_info(&hdev->dev, "The delay is %d us\n", duration_us); + } + if (hub_configure(hub, endpoint) >= 0) return 0; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 From: peter.chen@freescale.com (Peter Chen) Date: Fri, 8 Jan 2016 13:44:24 +0800 Subject: [RFC PATCH 2/2] usb: Example for how to use device node at usb device driver In-Reply-To: <1452231864-11171-1-git-send-email-peter.chen@freescale.com> References: <1452231864-11171-1-git-send-email-peter.chen@freescale.com> Message-ID: <1452231864-11171-3-git-send-email-peter.chen@freescale.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org In this example, we take HUB driver as an example to show how to get properties in USB device driver if this device has device node. Signed-off-by: Peter Chen --- arch/arm/boot/dts/imx6sx-sdb.dtsi | 9 +++++++++ drivers/usb/core/hub.c | 8 ++++++++ 2 files changed, 17 insertions(+) diff --git a/arch/arm/boot/dts/imx6sx-sdb.dtsi b/arch/arm/boot/dts/imx6sx-sdb.dtsi index 94ac400..fe0fd95 100644 --- a/arch/arm/boot/dts/imx6sx-sdb.dtsi +++ b/arch/arm/boot/dts/imx6sx-sdb.dtsi @@ -275,6 +275,15 @@ vbus-supply = <®_usb_otg2_vbus>; dr_mode = "host"; status = "okay"; + + #address-cells = <1>; + #size-cells = <0>; + hub: genesys at 01 { + compatible = "05e3,0608"; + reg = <0x01>; + delay-duration-us = <50>; + }; + }; &usdhc2 { diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 4c77001..1babfd4 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include @@ -1748,6 +1749,7 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id) struct usb_device *hdev; struct usb_hub *hub; int ret; + u32 duration_us = 0; desc = intf->cur_altsetting; hdev = interface_to_usbdev(intf); @@ -1873,6 +1875,12 @@ descriptor_error: return ret; } + of_property_read_u32(hdev->dev.of_node, "delay-duration-us", &duration_us); + if (duration_us > 0) { + usleep_range(duration_us, duration_us + 10); + dev_info(&hdev->dev, "The delay is %d us\n", duration_us); + } + if (hub_configure(hub, endpoint) >= 0) return 0; -- 1.9.1