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:
> > > There is a requirement
> > Where?
> We require it for a development board for our hip06 platform.
Okay, and this particular platform uses Synopsys IP?
> > > 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
> (like PNP0501) as we cannot use the 8250 PNP driver.
Why not? What are the impediments?
> This is related to the Hisi LPC ACPI support, where we would create
> MFD (i.e. platform device) for the UART.
Why you can't do properly in ACPI?
> > > - IO port iotype
> > > - 16550-compatible
> > >
> > > For OF, we have 8250_of.c, and for PNP device we have 8250_pnp.c
> > > drivers. However there does not seem to any driver satisfying
> > > the above requirements. So this RFC is to find opinion on
> > > modifying the Synopsys DW 8250_dw.c driver to support these
> > > generic features.
> > Synopsys 8250 is a particular case of platform drivers. It doesn't
> > satisfy "8250-compatible UART" requirement.
> Right, but I wanted to try to use the generic parts of the driver to
> support this UART to save writing yet another driver.
It's still odd. Why this one, why not 8250_foo_bar to touch instead?
Andy Shevchenko <andriy.shevche...@linux.intel.com>
Intel Finland Oy