From: Peter Chen <peter.chen-KZfg59tc24xl57MIdRCFDg@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 <peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org> 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 [thread overview] Message-ID: <1452231864-11171-3-git-send-email-peter.chen@freescale.com> (raw) In-Reply-To: <1452231864-11171-1-git-send-email-peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.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 <peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org> --- 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 <linux/random.h> #include <linux/pm_qos.h> #include <linux/of_platform.h> +#include <linux/of.h> #include <asm/uaccess.h> #include <asm/byteorder.h> @@ -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
WARNING: multiple messages have this Message-ID (diff)
From: peter.chen@freescale.com (Peter Chen) To: linux-arm-kernel@lists.infradead.org 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 [thread overview] Message-ID: <1452231864-11171-3-git-send-email-peter.chen@freescale.com> (raw) In-Reply-To: <1452231864-11171-1-git-send-email-peter.chen@freescale.com> 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 <peter.chen@freescale.com> --- 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 <linux/random.h> #include <linux/pm_qos.h> #include <linux/of_platform.h> +#include <linux/of.h> #include <asm/uaccess.h> #include <asm/byteorder.h> @@ -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
next prev parent reply other threads:[~2016-01-08 5:44 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-01-08 5:44 [RFC PATCH 0/2] USB: let the USB device know device node Peter Chen 2016-01-08 5:44 ` Peter Chen [not found] ` <1452231864-11171-1-git-send-email-peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org> 2016-01-08 5:44 ` [RFC PATCH 1/2] USB: core: let " Peter Chen 2016-01-08 5:44 ` Peter Chen [not found] ` <1452231864-11171-2-git-send-email-peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org> 2016-01-08 8:22 ` Arnd Bergmann 2016-01-08 8:22 ` Arnd Bergmann 2016-01-09 8:56 ` Peter Chen 2016-01-09 8:56 ` Peter Chen 2016-01-08 14:32 ` Rob Herring 2016-01-08 14:32 ` Rob Herring [not found] ` <CAL_JsqKwATxGiqJ_MNV6_pur1dUEVOzH+iB8yY+kWA0y2gWbNg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-01-09 9:05 ` Peter Chen 2016-01-09 9:05 ` Peter Chen 2016-01-09 15:20 ` Rob Herring 2016-01-09 15:20 ` Rob Herring 2016-01-08 22:50 ` Alan Stern 2016-01-08 22:50 ` Alan Stern [not found] ` <Pine.LNX.4.44L0.1601081746080.21467-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org> 2016-01-09 9:32 ` Peter Chen 2016-01-09 9:32 ` Peter Chen 2016-01-08 5:44 ` Peter Chen [this message] 2016-01-08 5:44 ` [RFC PATCH 2/2] usb: Example for how to use device node at usb device driver Peter Chen [not found] ` <1452231864-11171-3-git-send-email-peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org> 2016-01-08 8:26 ` Arnd Bergmann 2016-01-08 8:26 ` Arnd Bergmann 2016-01-09 8:57 ` Peter Chen 2016-01-09 8:57 ` Peter Chen
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=1452231864-11171-3-git-send-email-peter.chen@freescale.com \ --to=peter.chen-kzfg59tc24xl57midrcfdg@public.gmane.org \ --cc=arnd-r2nGTMty4D4@public.gmane.org \ --cc=balbi-l0cyMroinI0@public.gmane.org \ --cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org \ --cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \ --cc=linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=mark.rutland-5wv7dgnIgG8@public.gmane.org \ --cc=pawel.moll-5wv7dgnIgG8@public.gmane.org \ --cc=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \ --cc=stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org \ --cc=valentin.longchamp-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.