69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* Copyright (C) 2013 Sascha Hauer <s.hauer@pengutronix.de>
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* Copyright (C) 2015 Marc Kleine-Budde <mkl@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <bootstate.h>
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#include <driver.h>
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#include <init.h>
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#include <malloc.h>
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#include <of.h>
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#include <string.h>
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#include <linux/err.h>
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static int bootstate_probe(struct device_d *dev)
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{
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struct device_node *np = dev->device_node;
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struct bootstate *bootstate;
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const char *alias;
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const char *backend_type = NULL;
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int ret;
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if (!np)
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return -EINVAL;
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alias = of_alias_get(np);
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if (!alias)
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alias = "bootstate";
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bootstate = bootstate_new_from_node(alias, np);
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if (IS_ERR(bootstate))
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return PTR_ERR(bootstate);
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of_property_read_string(np, "backend-type", &backend_type);
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if (!strcmp(backend_type, "state"))
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ret = bootstate_backend_state(bootstate, np);
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else if (!strcmp(backend_type, "nv"))
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ret = bootstate_backend_nv(bootstate);
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else
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return -EINVAL;
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return ret;
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}
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static __maybe_unused struct of_device_id bootstate_ids[] = {
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{
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.compatible = "barebox,bootstate",
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}, {
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/* sentinel */
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}
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};
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static struct driver_d bootstate_driver = {
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.name = "bootstate",
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.probe = bootstate_probe,
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.of_compatible = DRV_OF_COMPAT(bootstate_ids),
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};
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device_platform_driver(bootstate_driver);
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