dts/gs101-common-gps.dtsi

// SPDX-License-Identifier: GPL-2.0
/*
 * Common GPS device tree for for Google slider/whitefin
 *
 * Copyright (c) 2020 Google, LLC
 *    https://www.google.com
 */

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <arm64/exynos/exynos-pinctrl.h>


&spi_5 {
  #address-cells = <1>;
  #size-cells = <0>;
  status = "okay";
  pinctrl-names = "default";
  pinctrl-0 = <&spi5_bus &spi5_cs_func>;

  dma-mode;
  dmas = <&pdma0 10 &pdma0 11>;
  swap-mode = <1>;

  bcm4775@0 {
    compatible = "ssp-spi,bcm4775";
    reg = <0>;
    spi-max-frequency = <26000000>;
    spi-cpol;
    spi-cpha;

    pinctrl-names = "default";
    pinctrl-0 =
    <&gps_host_req &gps_mcu_req &gps_mcu_resp &gps_nstandby>;

    mcu-req-gpios = <&gpp1 1 GPIO_ACTIVE_HIGH>;
    nstandby-gpios= <&gpp0 2 GPIO_ACTIVE_LOW>;

    controller-data {
    samsung,spi-feedback-delay = <1>;
    samsung,spi-chip-select-mode = <0>;
    };
  };
};

&pinctrl_4 {
  gps_mcu_req: gps-mcu-req {
    samsung,pins = "gpp1-1";
    samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
    samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
    samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
    samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
  };
  gps_nstandby: gps-nstandby {
    samsung,pins ="gpp0-2";
    samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
    samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
    samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
    samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
  };
};

/ {
	fragment@bbd_pps {
		target-path = "/";
		__overlay__ {
			bbd_pps {
				compatible = "bbd-pps-gpio";
				status = "okay";
				gpios = <&gpp17 1 GPIO_ACTIVE_HIGH>;
				pinctrl-names = "default";
				assert-falling-edge = <0>;
			};
		};
	};
};