On Sun, May 21, 2017 at 12:44:03PM +0200, H. Nikolaus Schaller wrote:
Add driver for Wi2Wi W2SG0004/84 GPS module connected through uart.
Use serdev API hooks to monitor and forward the UART traffic to /dev/BTn and turn on/off the module. It also detects if the module is turned on (sends data) but should be off, e.g. if it was already turned on during boot or power-on-reset.
Additionally, rfkill block/unblock can be used to control an external LNA (and power down the module if not needed).
The driver concept is based on code developed by NeilBrown neilb@suse.de but simplified and adapted to use the new serdev API introduced in 4.11.
Signed-off-by: H. Nikolaus Schaller hns@goldelico.com
.../devicetree/bindings/misc/wi2wi,w2sg0004.txt | 20 + .../devicetree/bindings/vendor-prefixes.txt | 1 +
Please split binding patches.
drivers/misc/Kconfig | 16 + drivers/misc/Makefile | 1 + drivers/misc/w2sg0004.c | 646 +++++++++++++++++++++ include/linux/w2sg0004.h | 27 + 6 files changed, 711 insertions(+) create mode 100644 Documentation/devicetree/bindings/misc/wi2wi,w2sg0004.txt create mode 100644 drivers/misc/w2sg0004.c create mode 100644 include/linux/w2sg0004.h
diff --git a/Documentation/devicetree/bindings/misc/wi2wi,w2sg0004.txt b/Documentation/devicetree/bindings/misc/wi2wi,w2sg0004.txt new file mode 100644 index 000000000000..b7125c7a598c --- /dev/null +++ b/Documentation/devicetree/bindings/misc/wi2wi,w2sg0004.txt @@ -0,0 +1,20 @@ +Wi2Wi GPS module connected through UART
+Should be a subnode of the SoC UART it is connected to (serdev).
+Required properties: +- compatible: wi2wi,w2sg0004 or wi2wi,w2sg0084
Reformat to one per line.
+- on-off-gpio: the GPIO that controls the module's on-off toggle input
Does enable-gpios or powerdown-gpios work as those are semi-standard names. Also, need to state the active state.
+Optional properties: +- lna-suppy: an (optional) LNA regulator that is enabled together with the GPS receiver
typo
+Example:
+&uart2 {
- gps: w2sg0004 {
w2sg0004: gps {
The node name should be generic. The label can be whatever you like.
compatible = "wi2wi,w2sg0004";lna-supply = <&vsim>; /* LNA regulator */on-off-gpios = <&gpio5 17 GPIO_ACTIVE_HIGH>; /* GPIO_145: trigger for turning on/off w2sg0004 */};+}; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index c03d20140366..c56b3181b266 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -345,6 +345,7 @@ voipac Voipac Technologies s.r.o. wd Western Digital Corp. wetek WeTek Electronics, limited. wexler Wexler +wi2wi Wi2Wi, Inc. winbond Winbond Electronics corp. winstar Winstar Display Corp. wlf Wolfson Microelectronics