serial: sirf: add a new uart type support

in CSR A7DA SoC, uart6 located at BT module and it need multiple clock
sources, so for "sirf,marco-bt-uart" compatible uarts, drivers take 3
clock sources and enable them.

this patch also replaces clk_get by devm_clk_get function and fix DT
binding document in which we missed to fix when we added marco platform
in commit 909102db44f "serial: sirf: add support for Marco chip".

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 15 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/serial/sirf-uart.txt b/Documentation/devicetree/bindings/serial/sirf-uart.txt
index a2dfc6522a91..3acdd969edf1 100644
--- a/Documentation/devicetree/bindings/serial/sirf-uart.txt
+++ b/Documentation/devicetree/bindings/serial/sirf-uart.txt
@@ -1,7 +1,9 @@
 * CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter *
 
 Required properties:
-- compatible : Should be "sirf,prima2-uart" or "sirf, prima2-usp-uart"
+- compatible : Should be "sirf,prima2-uart", "sirf, prima2-usp-uart",
+                "sirf,marco-uart" or "sirf,marco-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
@@ -31,3 +33,15 @@ usp@b0090000 {
         rts-gpios = <&gpio 15 0>;
         cts-gpios = <&gpio 46 0>;
 };
+
+for uart use in BT module,
+uart6: uart@11000000 {
+        cell-index = <6>;
+        compatible = "sirf,marco-bt-uart", "sirf,marco-uart";
+        reg = <0x11000000 0x1000>;
+        interrupts = <0 100 0>;
+        clocks = <&clks 138>, <&clks 140>, <&clks 141>;
+        clock-names = "uart", "general", "noc";
+        fifosize = <128>;
+        status = "disabled";
+}