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These changes are specific to some driver that may be used by multiple boards or socs. The most significant change in here is the move of the samsung iommu code from a platform specific in-kernel interface to the generic iommu subsystem. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJPuevXAAoJEIwa5zzehBx3D8YQAKfoY3TFjJ9KmJgk69/pc7cf Of0rvX+35NezGFljIyRdspz+DsV+vhJravwdVxOagRKvVBOb9qnZIXnl3gkLnTw4 dCVMFMqCwXhBeXlXCzHSeRmt2+4/fmJnr7jr4xh9omOAJ9BZv5ftmKNW4zP5wr1L +9HBwzkxlVisR4NCz2q66YBjsV2dXA3dv2hZxEFkUdQFYJGqZoUXLYHF9yno20i3 knKNXEyAFYFUKHiFVBQJ1tYGmZlaIjw14g+GTqzZay2Pi/HjUXfrPd0VwNkBzZf/ H1N3/cf4GJ2+K/zYqh+H/Xjf/Fjkp1dFNhlUQ7+l5Jwbu7C1B2euvwTO4OaqrfdD 7eqG3+uIKhPO2Z8ZySLFgx4ghybtwgZrAwOjsa+ymTugqPbiWYB/zZR1iWu5DMk/ TnNb6P3ciP+WMpoMFh1kXRc/eCCCHtuQ0rLRxizSX6HIpxWvjYFNLH7L3wS+KtlB 7vsS764d1JFW318bsdBi+V/LWRVXeSWWetTzdzDcM/Syz3ZqfPy7e3Ge6qx0lvYe 5ojgzKwVqpJenZdt91UC16cMXNqDTzmZObz6LOCmVm1mB5kYSgEHYxAQQvuGFjXT 28kGyBQNsBboJGaYh2O/CTsVXnHnaPXrtDDWMDacWNwwPYnnA2L8lUNfAg1DgA1j Z6CO8Knfct01EpQLtybK =hgkg -----END PGP SIGNATURE----- Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull arm-soc driver specific updates from Olof Johansson: "These changes are specific to some driver that may be used by multiple boards or socs. The most significant change in here is the move of the samsung iommu code from a platform specific in-kernel interface to the generic iommu subsystem." Fix up trivial conflicts in arch/arm/mach-exynos/Kconfig * tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (28 commits) mmc: dt: Consolidate DT bindings iommu/exynos: Add iommu driver for EXYNOS Platforms ARM: davinci: optimize the DMA ISR ARM: davinci: implement DEBUG_LL port choice ARM: tegra: Add SMMU enabler in AHB ARM: tegra: Add Tegra AHB driver Input: pxa27x_keypad add choice to set direct_key_mask Input: pxa27x_keypad direct key may be low active Input: pxa27x_keypad bug fix for direct_key_mask Input: pxa27x_keypad keep clock on as wakeup source ARM: dt: tegra: pinmux changes for USB ULPI ARM: tegra: add USB ULPI PHY reset GPIO to device tree ARM: tegra: don't hard-code USB ULPI PHY reset_gpio ARM: tegra: change pll_p_out4's rate to 24MHz ARM: tegra: fix pclk rate ARM: tegra: reparent sclk to pll_c_out1 ARM: tegra: Add pllc clock init table ARM: dt: tegra cardhu: basic audio support ARM: dt: tegra30.dtsi: Add audio-related nodes ARM: tegra: add AUXDATA required for audio ...
To understand all the Linux-USB framework, you'll use these resources: * This source code. This is necessarily an evolving work, and includes kerneldoc that should help you get a current overview. ("make pdfdocs", and then look at "usb.pdf" for host side and "gadget.pdf" for peripheral side.) Also, Documentation/usb has more information. * The USB 2.0 specification (from www.usb.org), with supplements such as those for USB OTG and the various device classes. The USB specification has a good overview chapter, and USB peripherals conform to the widely known "Chapter 9". * Chip specifications for USB controllers. Examples include host controllers (on PCs, servers, and more); peripheral controllers (in devices with Linux firmware, like printers or cell phones); and hard-wired peripherals like Ethernet adapters. * Specifications for other protocols implemented by USB peripheral functions. Some are vendor-specific; others are vendor-neutral but just standardized outside of the www.usb.org team. Here is a list of what each subdirectory here is, and what is contained in them. core/ - This is for the core USB host code, including the usbfs files and the hub class driver ("khubd"). host/ - This is for USB host controller drivers. This includes UHCI, OHCI, EHCI, and others that might be used with more specialized "embedded" systems. gadget/ - This is for USB peripheral controller drivers and the various gadget drivers which talk to them. Individual USB driver directories. A new driver should be added to the first subdirectory in the list below that it fits into. image/ - This is for still image drivers, like scanners or digital cameras. ../input/ - This is for any driver that uses the input subsystem, like keyboard, mice, touchscreens, tablets, etc. ../media/ - This is for multimedia drivers, like video cameras, radios, and any other drivers that talk to the v4l subsystem. ../net/ - This is for network drivers. serial/ - This is for USB to serial drivers. storage/ - This is for USB mass-storage drivers. class/ - This is for all USB device drivers that do not fit into any of the above categories, and work for a range of USB Class specified devices. misc/ - This is for all USB device drivers that do not fit into any of the above categories.