From mboxrd@z Thu Jan 1 00:00:00 1970 From: Krzysztof Kozlowski Subject: [PATCH v3 10/12] EXAMPLE CODE: usb: hub: Power sequence the ports on activation Date: Wed, 01 Jun 2016 10:02:19 +0200 Message-ID: <1464768141-25420-11-git-send-email-k.kozlowski@samsung.com> References: <1464768141-25420-1-git-send-email-k.kozlowski@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <1464768141-25420-1-git-send-email-k.kozlowski@samsung.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: hzpeterchen@gmail.com, Ulf Hansson , Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse , Krzysztof Kozlowski , Javier Martinez Canillas , linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-pm@vger.kernel.or, Alan Stern , linux-usb@vger.kernel.org, Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Kukjin Kim , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Cc: Greg Kroah-Hartman , Bartlomiej Zolnierkiewicz List-Id: devicetree@vger.kernel.org The autodetection of attached USB device might not work on certain boards where the power is delivered externally. These devices also might require a hard reset. Use pwrseq for that in USB hub. Signed-off-by: Krzysztof Kozlowski --- drivers/usb/core/hub.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index c421745b84aa..46d9f9aedacc 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include @@ -1663,6 +1664,15 @@ static int hub_configure(struct usb_hub *hub, usb_hub_adjust_deviceremovable(hdev, hub->descriptor); + /* FIXME: When do the pre-power-on? */ + /* + for (i = 0; i < maxchild; i++) + pwrseq_pre_power_on(hub->ports[i]->pwrseq); + */ + + for (i = 0; i < maxchild; i++) + pwrseq_post_power_on(hub->ports[i]->pwrseq); + hub_activate(hub, HUB_INIT); return 0; -- 1.9.1