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4642d34a43
The Aspeed 2400/2500 families have a variant of UHCI which requires some quirks to the driver to work: - The register offsets are different. We add a remapping helper. - All accesses have to be done via 32-bit loads and stores. We force all accessors to use readl/writel. This is of no consequence for reads as we never read "in the middle" of a register. For writes it also works fine as the registers only actually implement the bits we try to write (16-bit for the registers accessed with writew and 8-bit for the register accessed with writeb), so always using a 32-bit write will have no negative effect. We never do partial writes. - The resume detect interrupt is broken - The number of ports is (optionally) provided via the device-tree Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Alan Stern <stern@rowland.harvard.edu> -- v2. Remove the bulk of the #ifdef's drivers/usb/host/Kconfig | 6 ++++- drivers/usb/host/uhci-hcd.c | 17 +++++++++++--- drivers/usb/host/uhci-hcd.h | 51 ++++++++++++++++++++++++++++++++++++++++ drivers/usb/host/uhci-platform.c | 22 ++++++++++++++++- 4 files changed, 91 insertions(+), 5 deletions(-) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.