wlcore: spi: add wl18xx support

Add support for using with both wl12xx and wl18xx.

- all wilink family needs special init command for entering wspi mode.
  extra clock cycles should be sent after the spi init command while the
  cs pin is high.
- Use inverted chip select for sending a dummy 4 bytes command that
  completes the init stage.

Signed-off-by: Eyal Reizer <eyalr@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 32 insertions, 9 deletions

diff --git a/Documentation/devicetree/bindings/net/wireless/ti,wlcore,spi.txt b/Documentation/devicetree/bindings/net/wireless/ti,wlcore,spi.txt
index 9180724e182c..8f9ced076fe1 100644
--- a/Documentation/devicetree/bindings/net/wireless/ti,wlcore,spi.txt
+++ b/Documentation/devicetree/bindings/net/wireless/ti,wlcore,spi.txt
@@ -1,19 +1,30 @@
-* Texas Instruments wl1271 wireless lan controller
+* Texas Instruments wl12xx/wl18xx wireless lan controller
 
-The wl1271 chip can be connected via SPI or via SDIO. This
+The wl12xx/wl18xx chips can be connected via SPI or via SDIO. This
 document describes the binding for the SPI connected chip.
 
 Required properties:
-- compatible :          Should be "ti,wl1271"
+- compatible :          Should be one of the following:
+    * "ti,wl1271"
+    * "ti,wl1273"
+    * "ti,wl1281"
+    * "ti,wl1283"
+    * "ti,wl1801"
+    * "ti,wl1805"
+    * "ti,wl1807"
+    * "ti,wl1831"
+    * "ti,wl1835"
+    * "ti,wl1837"
 - reg :                 Chip select address of device
 - spi-max-frequency :   Maximum SPI clocking speed of device in Hz
-- ref-clock-frequency : Reference clock frequency
 - interrupt-parent, interrupts :
                         Should contain parameters for 1 interrupt line.
                         Interrupt parameters: parent, line number, type.
-- vwlan-supply :        Point the node of the regulator that powers/enable the wl1271 chip
+- vwlan-supply :        Point the node of the regulator that powers/enable the
+                        wl12xx/wl18xx chip
 
 Optional properties:
+- ref-clock-frequency : Reference clock frequency (should be set for wl12xx)
 - clock-xtal :          boolean, clock is generated from XTAL
 
 - Please consult Documentation/devicetree/bindings/spi/spi-bus.txt
@@ -21,16 +32,28 @@ Optional properties:
 
 Examples:
 
+For wl12xx family:
 &spi1 {
-	wl1271@1 {
+	wlcore: wlcore@1 {
 		compatible = "ti,wl1271";
-
 		reg = <1>;
 		spi-max-frequency = <48000000>;
-		clock-xtal;
-		ref-clock-frequency = <38400000>;
 		interrupt-parent = <&gpio3>;
 		interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
 		vwlan-supply = <&vwlan_fixed>;
+		clock-xtal;
+		ref-clock-frequency = <38400000>;
+	};
+};
+
+For wl18xx family:
+&spi0 {
+	wlcore: wlcore@0 {
+		compatible = "ti,wl1835";
+		reg = <0>;
+		spi-max-frequency = <48000000>;
+		interrupt-parent = <&gpio0>;
+		interrupts = <27 IRQ_TYPE_EDGE_RISING>;
+		vwlan-supply = <&vwlan_fixed>;
 	};
 };