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Platforms using DesignWare IP use dw_pci_msi_bottom_irq_chip for configuring the MSI controller logic within the DesignWare IP. However certain platforms like Keystone (K2G) which uses DesignWare IP have their own MSI controller logic. For handling such platforms, the irqchip ops use msi_irq_ack(), msi_set_irq(), msi_clear_irq() callback functions. Add support to use different msi_irq_chip with default set to dw_pci_msi_bottom_irq_chip. This is in preparation to get rid of msi_irq_ack(), msi_set_irq(), msi_clear_irq() and other Keystone specific dw_pcie_host_ops. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.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 Restructured Text 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.