From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- .../devicetree/bindings/serial/sirf-uart.txt | 47 ++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 kernel/Documentation/devicetree/bindings/serial/sirf-uart.txt (limited to 'kernel/Documentation/devicetree/bindings/serial/sirf-uart.txt') diff --git a/kernel/Documentation/devicetree/bindings/serial/sirf-uart.txt b/kernel/Documentation/devicetree/bindings/serial/sirf-uart.txt new file mode 100644 index 000000000..f0c39261c --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/serial/sirf-uart.txt @@ -0,0 +1,47 @@ +* CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter * + +Required properties: +- compatible : Should be "sirf,prima2-uart", "sirf, prima2-usp-uart", + "sirf,atlas7-uart" or "sirf,atlas7-bt-uart" which means + uart located in BT module and used for BT. +- reg : Offset and length of the register set for the device +- interrupts : Should contain uart interrupt +- fifosize : Should define hardware rx/tx fifo size +- clocks : Should contain uart clock number + +Optional properties: +- sirf,uart-has-rtscts: we have hardware flow controller pins in hardware +- rts-gpios: RTS pin for USP-based UART if sirf,uart-has-rtscts is true +- cts-gpios: CTS pin for USP-based UART if sirf,uart-has-rtscts is true + +Example: + +uart0: uart@b0050000 { + cell-index = <0>; + compatible = "sirf,prima2-uart"; + reg = <0xb0050000 0x1000>; + interrupts = <17>; + fifosize = <128>; + clocks = <&clks 13>; +}; + +On the board-specific dts, we can put rts-gpios and cts-gpios like + +usp@b0090000 { + compatible = "sirf,prima2-usp-uart"; + sirf,uart-has-rtscts; + rts-gpios = <&gpio 15 0>; + cts-gpios = <&gpio 46 0>; +}; + +for uart use in BT module, +uart6: uart@11000000 { + cell-index = <6>; + compatible = "sirf,atlas7-bt-uart", "sirf,atlas7-uart"; + reg = <0x11000000 0x1000>; + interrupts = <0 100 0>; + clocks = <&clks 138>, <&clks 140>, <&clks 141>; + clock-names = "uart", "general", "noc"; + fifosize = <128>; + status = "disabled"; +} -- cgit 1.2.3-korg