From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755477AbcEEMfA (ORCPT ); Thu, 5 May 2016 08:35:00 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:29311 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750905AbcEEMe4 (ORCPT ); Thu, 5 May 2016 08:34:56 -0400 X-AuditID: cbfec7f4-f796c6d000001486-2c-572b3deb7935 From: Krzysztof Kozlowski To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-mmc@vger.kernel.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, Ulf Hansson , Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse , Greg Kroah-Hartman , Mark Brown Cc: tjakobi@math.uni-bielefeld.de, m.szyprowski@samsung.com, hverkuil@xs4all.nl, Krzysztof Kozlowski , Bartlomiej Zolnierkiewicz Subject: [RFC v2 00/13] usb/mmc/power: Fix USB/LAN when TFTP booting Date: Thu, 05 May 2016 14:34:13 +0200 Message-id: <1462451666-17945-1-git-send-email-k.kozlowski@samsung.com> X-Mailer: git-send-email 1.9.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrOLMWRmVeSWpSXmKPExsVy+t/xa7qvbbXDDbY+NbDYOGM9q8XUh0/Y LCY9ec9sMf/IOVaLiSsnM1s0L17PZnFq8jMmi9cvDC02Pb7GanF51xw2iyP/+xktPvceYbSY cX4fk8WiZa3MFmuP3GW3OL27xKJt9QdWi+Nrwx2EPHbOusvusXmFlsemVZ1sHneu7WHz2D93 DVBoSb3Hv2PsHn1bVjF6fN4k53Hq62f2AK4oLpuU1JzMstQifbsErowty26yFFyXqzi2fRFr A+NCsS5GTg4JAROJi1f7WCBsMYkL99azdTFycQgJLGWUmDphAxOE08gkcWfqBbAqNgFjic3L l4BViQjcYJZ4tXMyM4jDLLCDUeLvsjtgVcICLhIv5v4GSnBwsAioSsz7ygcS5hVwl+h9/I8R Yp2cxMljk1knMHIvYGRYxSiaWppcUJyUnmuoV5yYW1yal66XnJ+7iRESvF92MC4+ZnWIUYCD UYmH98B8rXAh1sSy4srcQ4wSHMxKIrzywNAX4k1JrKxKLcqPLyrNSS0+xCjNwaIkzjt31/sQ IYH0xJLU7NTUgtQimCwTB6dUA6PO4vPlmYeaTrtfP+whIF6UblP7ft/JVbJ26T5J65ZON5F4 IN0WUh5l/eaW5JVH8tN7p5RVGZk4cq/1u/0rgGtyfpDiqXlcBx187W4lBk+dmsJ79cvBJNe0 J4dXdZ9z0asPvqnOVLTx76natgwnln9dW862NRY1CmjyvOnSesPMmLvGPuRAjBJLcUaioRZz UXEiAP7lwhdaAgAA Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, This is a different, second try to fix usb3503+lan on Odroid U3 board if it was initialized by bootloader (e.g. for TFTP boot). First version: http://www.spinics.net/lists/linux-usb/msg140042.html Problem ======= When Odroid U3 (usb3503 + smsc95xx + max77686) boots from network (TFTP), the usb3503 and LAN smsc95xx do not show up in "lsusb". Hard-reset is required, e.g. by suspend to RAM. The actual TFTP boot does not have to happen. Just "usb start" from U-Boot is sufficient. >>From the schematics, the regulator is a supply only to LAN, however without toggling it off/on, the usb3503 hub won appear neither. Solution ======== This is very similar to the MMC pwrseq behavior so the idea is to: 1. Move MMC pwrseq drivers to generic place, 2. Extend the pwrseq-simple with regulator toggling, 3. Add support to USB hub and port core for pwrseq, 4. Toggle the regulator when needed. Issues ====== I am not familiar with USB subsystem, so please kindly guide me where USB related code should be placed. In the code there are still some issues to solve (FIXME/TODO notes). If the approach is okay, I will improve the patchset. However at this point - IT WORKS, which is nice. :) Best regards, Krzysztof Krzysztof Kozlowski (13): usb: misc: usb3503: Clean up on driver unbind power/mmc: Move pwrseq drivers to power/pwrseq MAINTAINERS: Retain Ulf Hansson as the same maintainer of pwrseq power: pwrseq: Enable COMPILE_TEST for drivers power: pwrseq: Remove mmc prefix from mmc_pwrseq power: pwrseq: Generalize mmc_pwrseq operations by removing mmc prefix power: pwrseq: simple: Add support for toggling regulator usb: hub: Handle deferred probe power: pwrseq: Add support for USB hubs with external power usb: hub: Power sequence the ports on activation usb: port: Parse pwrseq phandle from Device Tree ARM: dts: exynos: Switch the buck8 to GPIO mode on Odroid U3 ARM: dts: exynos: Fix LAN and HUB after bootloader initialization on Odroid U3 .../devicetree/bindings/mmc/mmc-pwrseq-simple.txt | 2 + MAINTAINERS | 8 +++ arch/arm/boot/dts/exynos4412-odroid-common.dtsi | 2 +- arch/arm/boot/dts/exynos4412-odroidu3.dts | 7 ++ drivers/mmc/Kconfig | 2 - drivers/mmc/core/Makefile | 3 - drivers/mmc/core/core.c | 8 +-- drivers/mmc/core/host.c | 2 +- drivers/mmc/core/pwrseq.h | 52 -------------- drivers/power/Kconfig | 1 + drivers/power/Makefile | 1 + drivers/{mmc/core => power/pwrseq}/Kconfig | 21 ++++-- drivers/power/pwrseq/Makefile | 3 + drivers/{mmc/core => power/pwrseq}/pwrseq.c | 80 +++++++++++++++++----- drivers/{mmc/core => power/pwrseq}/pwrseq_emmc.c | 15 ++-- drivers/{mmc/core => power/pwrseq}/pwrseq_simple.c | 73 ++++++++++++++++---- drivers/usb/core/hub.c | 17 ++++- drivers/usb/core/hub.h | 3 + drivers/usb/core/port.c | 15 ++++ drivers/usb/misc/usb3503.c | 28 ++++++++ include/linux/mmc/host.h | 4 +- include/linux/pwrseq.h | 60 ++++++++++++++++ 22 files changed, 294 insertions(+), 113 deletions(-) delete mode 100644 drivers/mmc/core/pwrseq.h rename drivers/{mmc/core => power/pwrseq}/Kconfig (65%) create mode 100644 drivers/power/pwrseq/Makefile rename drivers/{mmc/core => power/pwrseq}/pwrseq.c (50%) rename drivers/{mmc/core => power/pwrseq}/pwrseq_emmc.c (89%) rename drivers/{mmc/core => power/pwrseq}/pwrseq_simple.c (64%) create mode 100644 include/linux/pwrseq.h -- 1.9.1