mirror of
https://github.com/torvalds/linux.git
synced 2026-04-19 23:34:00 -04:00
094b10cb79
The CSR GSD4t is a CSR product using the SiRFstarIV core, and the CSR CSRG05TA03-ICJE-R is a CSR product using the SiRFstarV core. These chips have a SRESETN line that can be pulled low to hard reset the chip and in some designs this is connected to a GPIO, so add this as an optional property. Update the example with a reset line so users see that it need to be tagged as active low. Cc: devicetree@vger.kernel.org Cc: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20220317225844.1262643-4-linus.walleij@linaro.org
77 lines
2.0 KiB
YAML
77 lines
2.0 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/gnss/sirfstar.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: SiRFstar GNSS Receiver Device Tree Bindings
|
|
|
|
maintainers:
|
|
- Johan Hovold <johan@kernel.org>
|
|
|
|
description:
|
|
The SiRFstar GNSS receivers have incarnated over the years in different
|
|
chips, starting from the SiRFstarIII which was a chip that was introduced in
|
|
2004 and used in a lot of dedicated GPS devices. In 2009 SiRF was acquired
|
|
by CSR (Cambridge Silicon Radio) and in 2012 the CSR GPS business was
|
|
acquired by Samsung, while some products remained with CSR. In 2014 CSR
|
|
was acquired by Qualcomm who still sell some of the SiRF products.
|
|
|
|
SiRF chips can be used over UART, I2C or SPI buses.
|
|
|
|
allOf:
|
|
- $ref: gnss-common.yaml#
|
|
|
|
properties:
|
|
compatible:
|
|
enum:
|
|
- csr,gsd4t
|
|
- csr,csrg05ta03-icje-r
|
|
- fastrax,uc430
|
|
- linx,r4
|
|
- wi2wi,w2sg0004
|
|
- wi2wi,w2sg0008i
|
|
- wi2wi,w2sg0084i
|
|
|
|
reg:
|
|
description:
|
|
The I2C Address, SPI chip select address. Not required on UART buses.
|
|
|
|
vcc-supply:
|
|
description:
|
|
Main voltage regulator, pin names such as 3V3_IN, VCC, VDD.
|
|
|
|
reset-gpios:
|
|
maxItems: 1
|
|
description: An optional active low reset line, should be flagged with
|
|
GPIO_ACTIVE_LOW.
|
|
|
|
sirf,onoff-gpios:
|
|
maxItems: 1
|
|
description: GPIO used to power on and off device, pin name ON_OFF.
|
|
|
|
sirf,wakeup-gpios:
|
|
maxItems: 1
|
|
description: GPIO used to determine device power state, pin names such
|
|
as RFPWRUP, WAKEUP.
|
|
|
|
required:
|
|
- compatible
|
|
- vcc-supply
|
|
|
|
unevaluatedProperties: false
|
|
|
|
examples:
|
|
- |
|
|
#include <dt-bindings/gpio/gpio.h>
|
|
serial {
|
|
gnss {
|
|
compatible = "wi2wi,w2sg0084i";
|
|
vcc-supply = <&gnss_vcc_reg>;
|
|
reset-gpios = <&gpio0 15 GPIO_ACTIVE_LOW>;
|
|
sirf,onoff-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
|
|
sirf,wakeup-gpios = <&gpio0 17 GPIO_ACTIVE_HIGH>;
|
|
current-speed = <38400>;
|
|
};
|
|
};
|