On 01/03/2018 19:52, Andy Shevchenko wrote:
On Tue, 2018-02-27 at 00:40 +0800, John Garry wrote:
> This patchset supports the IPMI-bt device attached to the Low-Pin-
> Count
> interface implemented on Hisilicon Hip06/Hip07 SoC.
> -----------
> | LPC host|
> | |
> -----------
> |
> _____________V_______________LPC
> | |
> V V
> ------------
> | BT(ipmi)|
> ------------
>
> When master accesses those peripherals beneath the Hip06/Hip07 LPC, a
> specific
> LPC driver is needed to make LPC host generate the standard LPC I/O
> cycles with
> the target peripherals'I/O port addresses. But on curent arm64 world,
> there is
> no real I/O accesses. All the I/O operations through in/out accessors
> are based
> on MMIO ranges; on Hip06/Hip07 LPC the I/O accesses are performed
> through driver
> specific accessors rather than MMIO.
> To solve this issue and keep the relevant existing peripherals'
> drivers untouched,
> this patchset:
> - introduces a generic I/O space management framework, logical PIO,
> to support
> I/O operations on host controllers operating either on MMIO
> buses or on buses
> requiring specific driver I/O accessors;
> - redefines the in/out accessors to provide a unified interface for
> both MMIO
> and driver specific I/O operations. Using logical PIO, th call of
> in/out() from
> the host children drivers, such as ipmi-si, will be redirected to
> the
> corresponding device-specific I/O hooks to perform the I/O
> accesses.
>
> Based on this patch-set, all the I/O accesses to Hip06/Hip07 LPC
> peripherals can
> be supported without any changes on the existing ipmi-si driver.
>
> The whole patchset has been tested on Hip07 D05 board both using DTB
> and ACPI.
>
I did a review and don't see the patch 8 is ready to go.
So, to move things forward I may suggest to reorder series that some
small preparation stuff can go first w/o dependency to the actual Logic
PIO / LPC.
Hi Andy,
As mentioned in the reply to patch #8, as a practical exercise I don't
see the reason to change it now. Let's conclude that issue first before
deciding on patchset revising.
Thanks very much,
John
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