1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/gnss/sirfstar.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: SiRFstar GNSS Receiver Device Tree Bindings 8 9maintainers: 10 - Johan Hovold <johan@kernel.org> 11 12description: 13 The SiRFstar GNSS receivers have incarnated over the years in different 14 chips, starting from the SiRFstarIII which was a chip that was introduced in 15 2004 and used in a lot of dedicated GPS devices. In 2009 SiRF was acquired 16 by CSR (Cambridge Silicon Radio) and in 2012 the CSR GPS business was 17 acquired by Samsung, while some products remained with CSR. In 2014 CSR 18 was acquired by Qualcomm who still sell some of the SiRF products. 19 20 SiRF chips can be used over UART, I2C or SPI buses. 21 22allOf: 23 - $ref: gnss-common.yaml# 24 25properties: 26 compatible: 27 enum: 28 - csr,gsd4t 29 - csr,csrg05ta03-icje-r 30 - fastrax,uc430 31 - linx,r4 32 - wi2wi,w2sg0004 33 - wi2wi,w2sg0008i 34 - wi2wi,w2sg0084i 35 36 reg: 37 description: 38 The I2C Address, SPI chip select address. Not required on UART buses. 39 40 vcc-supply: 41 description: 42 Main voltage regulator, pin names such as 3V3_IN, VCC, VDD. 43 44 reset-gpios: 45 maxItems: 1 46 description: An optional active low reset line, should be flagged with 47 GPIO_ACTIVE_LOW. 48 49 sirf,onoff-gpios: 50 maxItems: 1 51 description: GPIO used to power on and off device, pin name ON_OFF. 52 53 sirf,wakeup-gpios: 54 maxItems: 1 55 description: GPIO used to determine device power state, pin names such 56 as RFPWRUP, WAKEUP. 57 58required: 59 - compatible 60 - vcc-supply 61 62unevaluatedProperties: false 63 64examples: 65 - | 66 #include <dt-bindings/gpio/gpio.h> 67 serial { 68 gnss { 69 compatible = "wi2wi,w2sg0084i"; 70 vcc-supply = <&gnss_vcc_reg>; 71 reset-gpios = <&gpio0 15 GPIO_ACTIVE_LOW>; 72 sirf,onoff-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>; 73 sirf,wakeup-gpios = <&gpio0 17 GPIO_ACTIVE_HIGH>; 74 current-speed = <38400>; 75 }; 76 }; 77