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For chips with security enabled, it's only possible to load firmware with a valid signature pattern. If key_id is not zero, it indicates a security chip, and the driver will not load the config file. - Example log for a security chip. Bluetooth: hci0: RTL: examining hci_ver=0c hci_rev=000a lmp_ver=0c lmp_subver=8922 Bluetooth: hci0: RTL: rom_version status=0 version=1 Bluetooth: hci0: RTL: btrtl_initialize: key id 1 Bluetooth: hci0: RTL: loading rtl_bt/rtl8922au_fw.bin Bluetooth: hci0: RTL: cfg_sz 0, total sz 71301 Bluetooth: hci0: RTL: fw version 0x41c0c905 - Example log for a normal chip. Bluetooth: hci0: RTL: examining hci_ver=0c hci_rev=000a lmp_ver=0c lmp_subver=8922 Bluetooth: hci0: RTL: rom_version status=0 version=1 Bluetooth: hci0: RTL: btrtl_initialize: key id 0 Bluetooth: hci0: RTL: loading rtl_bt/rtl8922au_fw.bin Bluetooth: hci0: RTL: loading rtl_bt/rtl8922au_config.bin Bluetooth: hci0: RTL: cfg_sz 6, total sz 71307 Bluetooth: hci0: RTL: fw version 0x41c0c905 Tested-by: Hilda Wu <hildawu@realtek.com> Signed-off-by: Nial Ni <niall_ni@realsil.com.cn> Signed-off-by: Max Chou <max.chou@realtek.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
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.