Hi Rob, Am 22.02.2017 um 14:34 schrieb Rob Herring: > On Tue, Feb 21, 2017 at 8:29 PM, Andreas Färber <afaerber@xxxxxxx> wrote: >> One limitation is currently the lack of an IAP140 clk driver. Patch 4/4 works >> around that for UART0 with a fixed-clock. > > The PXA1928 clock driver should be close to what you need. They are > supposed to be very similar. Where do you see that in mainline? Not in drivers/clk/pxa/ at least. I'm certain the acorn-marvell tree has a PXA1908 clk driver somewhere, too, I just haven't ported it yet. >> Andreas Färber (8): >> Documentation: arm: Marvell: Document IAP140 >> tty: serial: Suppress deprecated SERIAL_PXA on arm64 >> tty: serial: 8250_pxa: Implement mmp earlycon > > You should not use the pxa serial driver. AFAICT, it was separate to > add DMA support, but now the base 8250 driver supports DMA. The base > 8250 driver works with the PXA1928 and should also work with the > PXA1908. Do you personally have one? I didn't spot a pxa1928 DT in mainline. So, by my reading both 8250_of.c and 8250_pxa.c list "mrvl,mmp-uart" for the platform driver. Is that really intentional? What the early_pxa earlycon does is set the register shift and then reuse the 8250 core - that looks perfectly valid to me. Are you possibly mixing that up with the non-8250 pxa serial driver that I am already suppressing one patch earlier? While at it, are you aware that we have two drivers, one pxa and one mmp, that bind to "marvell,pdma-1.0"? That seemed wrong to me, too. Regards, Andreas -- SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
