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d8c80bb3b5
Adding phy calibration sequence for USB 3.0 DRD PHY present on Exynos5420/5800 systems. This calibration facilitates setting certain PHY parameters viz. the Loss-of-Signal (LOS) Detector Threshold Level, as well as Tx-Vboost-Level for Super-Speed operations. Additionally we also set proper time to wait for RxDetect measurement, for desired PHY reference clock, so as to solve issue with enumeration of few USB 3.0 devices, like Samsung SUM-TSB16S 3.0 USB drive on the controller. We are using CR_port for this purpose to send required data to override the LOS values. On testing with USB 3.0 devices on USB 3.0 port present on SMDK5420, and peach-pit boards should see following message: usb 2-1: new SuperSpeed USB device number 2 using xhci-hcd and without this patch, should see below shown message: usb 1-1: new high-speed USB device number 2 using xhci-hcd [Also removed unnecessary extra lines in the register macro definitions] Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> [adapted to use phy_calibrate as entry point] Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.