[PATCH v3 1/3] of: address: Add parent_bus_addr to struct of_pci_range

[Manivannan Sadhasivam]

On Mon, Sep 30, 2024 at 02:44:53PM -0400, Frank Li wrote:
> Introduce field 'parent_bus_addr' in of_pci_range to retrieve untranslated
> CPU address information.
> 
> Refer to the diagram below to understand that the bus fabric in some
> systems (like i.MX8QXP) does not use a 1:1 address map between input and
> output.
> 
> Currently, many drivers use .cpu_addr_fixup() callback hardcodes that

s/drivers/controller drivers/

> translation in the code, e.g., "cpu_addr & CDNS_PLAT_CPU_TO_BUS_ADDR",
> "cpu_addr + BUS_IATU_OFFSET", etc, even though those translations *should*
> be described via DT.
> 

It'd be useful to mention which driver has the mentioned fixup as an example.

- Mani

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