Messages in this thread | | | Subject | Re: [RFC PATCH 0/2] serial: 8250_dw: IO space + polling mode support | From | Andy Shevchenko <> | Date | Mon, 26 Feb 2018 11:53:48 +0200 |
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On Mon, 2018-02-26 at 09:33 +0000, John Garry wrote: > On 23/02/2018 17:31, Andy Shevchenko wrote: > > On Fri, 2018-02-23 at 11:02 +0000, John Garry wrote: > > > On 23/02/2018 10:30, Andy Shevchenko wrote: > > > > On Fri, 2018-02-23 at 02:42 +0800, John Garry wrote:
> > > We require it for a development board for our hip06 platform. > > > > Okay, and this particular platform uses Synopsys IP? > > As I see this uart is really a virtual 8250, so HW details like apb > clocks and the like are hidden, so may not be relevant.
Good to know.
> However I will check with the BMC team to know the specific details.
> > > > > for supporting an 8250-compatible UART with > > > > > the following profile/features: > > > > > - platform device > > > > > - polling mode (i.e. no interrupt support) > > > > > - ACPI FW > > > > > > > > Elaborate this one, please. > > > > > > So we need to define our own HID here, and cannot use PNP > > > compatible > > > CID > > > (like PNP0501) as we cannot use the 8250 PNP driver. > > > > Why not? What are the impediments? > > > > To support the host controller for this device, we will create an > MFD, > i.e. platform device, per slave device.
There is no answer here...
> > > This is related to the Hisi LPC ACPI support, where we would > > > create > > > an > > > MFD (i.e. platform device) for the UART. > > > > Why you can't do properly in ACPI?
No answer here either.
Sorry, but with this level of communication it's no go for the series.
-- Andy Shevchenko <andriy.shevchenko@linux.intel.com> Intel Finland Oy
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