| Message ID | 20180619194450.6353-2-nm@ti.com |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | serial: 8250_omap: Add compatible for AM654 UART | expand |
On Tue, Jun 19, 2018 at 02:44:49PM -0500, Nishanth Menon wrote: > AM654 uses a UART controller that is only partially compatible with > existing 8250 UART. UART DMA integration is substantially different > and even a match against standard 8250 or omap4 would result in > non-working UART once DMA is enabled by default. > > Introduce a specific compatible to help build up the differences in > follow on patches. > > Cc: Sekhar Nori <nsekhar@ti.com> > Cc: Vignesh R <vigneshr@ti.com> > Signed-off-by: Nishanth Menon <nm@ti.com> > --- Acked-by: Rob Herring <robh@kernel.org> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/serial/omap_serial.txt b/Documentation/devicetree/bindings/serial/omap_serial.txt index 4b0f05adb228..c35d5ece1156 100644 --- a/Documentation/devicetree/bindings/serial/omap_serial.txt +++ b/Documentation/devicetree/bindings/serial/omap_serial.txt @@ -1,6 +1,7 @@ OMAP UART controller Required properties: +- compatible : should be "ti,am654-uart" for AM654 controllers - compatible : should be "ti,omap2-uart" for OMAP2 controllers - compatible : should be "ti,omap3-uart" for OMAP3 controllers - compatible : should be "ti,omap4-uart" for OMAP4 controllers
AM654 uses a UART controller that is only partially compatible with existing 8250 UART. UART DMA integration is substantially different and even a match against standard 8250 or omap4 would result in non-working UART once DMA is enabled by default. Introduce a specific compatible to help build up the differences in follow on patches. Cc: Sekhar Nori <nsekhar@ti.com> Cc: Vignesh R <vigneshr@ti.com> Signed-off-by: Nishanth Menon <nm@ti.com> --- Changes since RFC: * DT binding has been split out as it's own patch and commit message elaborated RFC: https://patchwork.kernel.org/patch/10447641/ Documentation/devicetree/bindings/serial/omap_serial.txt | 1 + 1 file changed, 1 insertion(+)