diff options
| author |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2021-06-18 13:46:32 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-06-21 21:16:31 +1000 |
| commit | 48b545b8018db61ab4978d29c73c16b9fbfad12c (patch) | |
| tree | e0af16bb18cc8c57058e2b27000f14c1f55fc908 /arch/powerpc/boot | |
| parent | powerpc/xics: Add a native ICS backend for microwatt (diff) | |
| download | linux-dev-48b545b8018db61ab4978d29c73c16b9fbfad12c.tar.xz linux-dev-48b545b8018db61ab4978d29c73c16b9fbfad12c.zip | |
powerpc/microwatt: Use standard 16550 UART for console
This adds support to the Microwatt platform to use the standard
16550-style UART which available in the standalone Microwatt FPGA.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/YMwXGCTzedpQje7r@thinks.paulus.ozlabs.org
Diffstat (limited to 'arch/powerpc/boot')
| -rw-r--r-- | arch/powerpc/boot/dts/microwatt.dts | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/arch/powerpc/boot/dts/microwatt.dts b/arch/powerpc/boot/dts/microwatt.dts index 04e5dd92270e..974abbdda249 100644 --- a/arch/powerpc/boot/dts/microwatt.dts +++ b/arch/powerpc/boot/dts/microwatt.dts @@ -6,6 +6,10 @@ model-name = "microwatt"; compatible = "microwatt-soc"; + aliases { + serial0 = &UART0; + }; + reserved-memory { #size-cells = <0x02>; #address-cells = <0x02>; @@ -89,12 +93,6 @@ }; }; - chosen { - bootargs = ""; - ibm,architecture-vec-5 = [19 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 40 00 40]; - }; - soc@c0000000 { compatible = "simple-bus"; #address-cells = <1>; @@ -119,5 +117,22 @@ #interrupt-cells = <2>; }; + UART0: serial@2000 { + device_type = "serial"; + compatible = "ns16550"; + reg = <0x2000 0x8>; + clock-frequency = <100000000>; + current-speed = <115200>; + reg-shift = <2>; + fifo-size = <16>; + interrupts = <0x10 0x1>; + }; + }; + + chosen { + bootargs = ""; + ibm,architecture-vec-5 = [19 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 + 00 00 00 00 00 00 00 00 40 00 40]; + stdout-path = &UART0; }; }; |