Merge branch 'earlycon-dt' into for-next

2 files changed, 42 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
new file mode 100644
index 0000000..246c795
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
@@ -0,0 +1,33 @@
+* NXP SC16IS7xx advanced Universal Asynchronous Receiver-Transmitter (UART)
+
+Required properties:
+- compatible: Should be one of the following:
+  - "nxp,sc16is740" for NXP SC16IS740,
+  - "nxp,sc16is741" for NXP SC16IS741,
+  - "nxp,sc16is750" for NXP SC16IS750,
+  - "nxp,sc16is752" for NXP SC16IS752,
+  - "nxp,sc16is760" for NXP SC16IS760,
+  - "nxp,sc16is762" for NXP SC16IS762.
+- reg: I2C address of the SC16IS7xx device.
+- interrupt-parent: The phandle for the interrupt controller that
+  services interrupts for this IC.
+- interrupts: Should contain the UART interrupt
+- clocks: Reference to the IC source clock.
+
+Optional properties:
+- gpio-controller: Marks the device node as a GPIO controller.
+- #gpio-cells: Should be two. The first cell is the GPIO number and
+  the second cell is used to specify the GPIO polarity:
+    0 = active high,
+    1 = active low.
+
+Example:
+        sc16is750: sc16is750@51 {
+                compatible = "nxp,sc16is750";
+                reg = <0x51>;
+                clocks = <&clk20m>;
+                interrupt-parent = <&gpio3>;
+                interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
+                gpio-controller;
+                #gpio-cells = <2>;
+        };
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 4384217..4946d8e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -883,6 +883,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			which are not unmapped.
 
 	earlycon=	[KNL] Output early console device and options.
+
 		uart[8250],io,<addr>[,options]
 		uart[8250],mmio,<addr>[,options]
 		uart[8250],mmio32,<addr>[,options]
@@ -892,6 +893,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			(mmio) or 32-bit (mmio32).
 			The options are the same as for ttyS, above.
 
+		pl011,<addr>
+			Start an early, polled-mode console on a pl011 serial
+			port at the specified address. The pl011 serial port
+			must already be setup and configured. Options are not
+			yet supported.
+
+		smh	Use ARM semihosting calls for early console.
+
 	earlyprintk=	[X86,SH,BLACKFIN,ARM]
 			earlyprintk=vga
 			earlyprintk=efi