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A mirror of the official Linux kernel repository just in case
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USBTrdTim must be programmed to 0x5 when phy has a UTMI+ 16-bit wide interface or 0x9 when it has a 8-bit wide interface. GUSBCFG reset value (Value After Reset: 0x1400) sets USBTrdTim to 0x5. In case of 8-bit UTMI+, without clearing GUSBCFG.USBTRDTIM mask, USBTrdTim results in 0xD (0x5 | 0x9). That's why we need to clear GUSBCFG.USBTRDTIM mask before setting USBTrdTim value, to ensure USBTrdTim is correctly set in case of 8-bit UTMI+. Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.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.