From dae95f0dfe9ad94922c940d3c0522d53284b4deb Mon Sep 17 00:00:00 2001 From: Marc Jones Date: Tue, 4 Apr 2017 17:29:38 -0600 Subject: amd/pi/hudson: Add GPIO get function Add a basic GPIO get function. Note that GPIO set, ACPI/GPE, and other features should come in future commits. Future changes to be modeled on the other soc/ gpio functions. Change-Id: I8f681865715ab947b525320a6f9fc63af1334b59 Signed-off-by: Marc Jones Reviewed-on: https://review.coreboot.org/19159 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- src/southbridge/amd/pi/hudson/gpio.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 src/southbridge/amd/pi/hudson/gpio.c (limited to 'src/southbridge/amd/pi/hudson/gpio.c') diff --git a/src/southbridge/amd/pi/hudson/gpio.c b/src/southbridge/amd/pi/hudson/gpio.c new file mode 100644 index 0000000000..5b2eb4c161 --- /dev/null +++ b/src/southbridge/amd/pi/hudson/gpio.c @@ -0,0 +1,28 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2015 Google Inc. + * Copyright (C) 2015 Intel Corporation + * Copyright (C) 2017 Advanced Micro Devices, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include "gpio.h" + +int gpio_get(gpio_t gpio_num) +{ + uint32_t reg; + + reg = read32((void*)(uintptr_t)gpio_num); + + return !!(reg & GPIO_PIN_STS); +} -- cgit v1.2.3