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dt-bindings: gnss: add sirfstar binding

Add binding for SiRFstar-based GNSS receivers.

Note that while four compatible-strings are initially added representing
devices which differ in which I/O interfaces they support, they
otherwise essentially share the same feature set.

Pin and supply names vary slightly, as do some recommended timings.

Note that the wakeup gpio is not intended to be used as a wakeup source,
but rather to detect the current power state of the device (active or
hibernate).

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Johan Hovold 2018-06-01 10:22:57 +02:00 committed by Greg Kroah-Hartman
parent 1ad69f10e3
commit 176193b7dd
3 changed files with 57 additions and 0 deletions

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@ -0,0 +1,45 @@
SiRFstar-based GNSS Receiver DT binding
SiRFstar chipsets are used in GNSS-receiver modules produced by several
vendors and can use UART, SPI or I2C interfaces.
Please see Documentation/devicetree/bindings/gnss/gnss.txt for generic
properties.
Required properties:
- compatible : Must be one of
"fastrax,uc430"
"linx,r4"
"wi2wi,w2sg0008i"
"wi2wi,w2sg0084i"
- vcc-supply : Main voltage regulator (pin name: 3V3_IN, VCC, VDD)
Required properties (I2C):
- reg : I2C slave address
Required properties (SPI):
- reg : SPI chip select address
Optional properties:
- sirf,onoff-gpios : GPIO used to power on and off device (pin name: ON_OFF)
- sirf,wakeup-gpios : GPIO used to determine device power state
(pin name: RFPWRUP, WAKEUP)
- timepulse-gpios : Time pulse GPIO (pin name: 1PPS, TM)
Example:
serial@1234 {
compatible = "ns16550a";
gnss {
compatible = "wi2wi,w2sg0084i";
vcc-supply = <&gnss_reg>;
sirf,onoff-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
sirf,wakeup-gpios = <&gpio0 17 GPIO_ACTIVE_HIGH>;
};
};

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@ -124,6 +124,7 @@ excito Excito
ezchip EZchip Semiconductor
fairphone Fairphone B.V.
faraday Faraday Technology Corporation
fastrax Fastrax Oy
fcs Fairchild Semiconductor
firefly Firefly
focaltech FocalTech Systems Co.,Ltd
@ -203,6 +204,7 @@ licheepi Lichee Pi
linaro Linaro Limited
linksys Belkin International, Inc. (Linksys)
linux Linux-specific binding
linx Linx Technologies
lltc Linear Technology Corporation
logicpd Logic PD, Inc.
lsi LSI Corp. (LSI Logic)

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--- Documentation/devicetree/bindings/vendor-prefixes.txt
+++ Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -395,6 +397,7 @@ vot Vision Optical Technology Co., Ltd.
wd Western Digital Corp.
wetek WeTek Electronics, limited.
wexler Wexler
+wi2wi Wi2Wi, Inc.
winbond Winbond Electronics corp.
winstar Winstar Display Corp.
wlf Wolfson Microelectronics