From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
To: hzpeterchen@gmail.com, Ulf Hansson <ulf.hansson@linaro.org>,
Sebastian Reichel <sre@kernel.org>,
Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>,
David Woodhouse <dwmw2@infradead.org>,
Krzysztof Kozlowski <k.kozlowski@samsung.com>,
Javier Martinez Canillas <javier@osg.samsung.com>,
linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org,
linux-pm@vger.kernel.or, Alan Stern <stern@rowland.harvard.edu>,
linux-usb@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>, Kukjin Kim <kgene@kernel.org>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Subject: [PATCH v3 10/12] EXAMPLE CODE: usb: hub: Power sequence the ports on activation
Date: Wed, 01 Jun 2016 10:02:19 +0200 [thread overview]
Message-ID: <1464768141-25420-11-git-send-email-k.kozlowski@samsung.com> (raw)
In-Reply-To: <1464768141-25420-1-git-send-email-k.kozlowski@samsung.com>
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 <k.kozlowski@samsung.com>
---
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 <linux/mutex.h>
#include <linux/random.h>
#include <linux/pm_qos.h>
+#include <linux/pwrseq.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
@@ -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
next prev parent reply other threads:[~2016-06-01 8:10 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-01 8:02 [PATCH v3 00/12] usb/mmc/power: Generic power sequence (and fix USB/LAN when TFTP booting) Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 01/12] power/mmc: Move pwrseq drivers to power/pwrseq Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 02/12] MAINTAINERS: Retain Ulf Hansson as the same maintainer of pwrseq Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 03/12] power: pwrseq: Enable COMPILE_TEST for drivers Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 04/12] power: pwrseq: Remove mmc prefix from mmc_pwrseq Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 05/12] power: pwrseq: Generalize mmc_pwrseq operations by removing mmc prefix Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 06/12] power: pwrseq: simple: Add support for regulator and generic property Krzysztof Kozlowski
2016-06-03 2:02 ` Rob Herring
2016-06-03 12:35 ` Krzysztof Kozlowski
2016-06-06 3:22 ` Peter Chen
2016-06-07 9:29 ` Krzysztof Kozlowski
2016-06-08 19:03 ` Rob Herring
2016-06-09 2:34 ` Chen-Yu Tsai
2016-06-09 5:11 ` Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 07/12] power: pwrseq: Add support for USB hubs with external power Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 08/12] usb: hub: Handle deferred probe Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 09/12] EXAMPLE CODE: usb: port: Parse pwrseq phandle from Device Tree Krzysztof Kozlowski
2016-06-01 8:57 ` Stephen Boyd
2016-06-01 9:06 ` Krzysztof Kozlowski
2016-06-01 12:05 ` Peter Chen
2016-06-01 18:16 ` Stephen Boyd
2016-06-02 1:24 ` Peter Chen
2016-06-01 8:02 ` Krzysztof Kozlowski [this message]
2016-06-01 8:02 ` [PATCH v3 11/12] ARM: dts: exynos: Switch the buck8 to GPIO mode on Odroid U3 Krzysztof Kozlowski
2016-06-01 8:02 ` [PATCH v3 12/12] ARM: dts: exynos: Fix LAN and HUB after bootloader initialization " Krzysztof Kozlowski
2016-06-01 11:59 ` Peter Chen
2016-06-02 7:26 ` Krzysztof Kozlowski
2016-06-02 7:58 ` Peter Chen
2016-06-06 20:43 ` [PATCH v3 00/12] usb/mmc/power: Generic power sequence (and fix USB/LAN when TFTP booting) Heiko Stübner
2016-06-07 6:03 ` Krzysztof Kozlowski
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