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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2017
* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
*/
#include <common.h>
#include <dm.h>
#include <log.h>
#include <dm/lists.h>
#include "gdsys_soc.h"
/**
* struct gdsys_soc_priv - Private data for gdsys soc bus
* @fpga: The gdsys IHS FPGA this bus is associated with
*/
struct gdsys_soc_priv {
struct udevice *fpga;
};
static const struct udevice_id gdsys_soc_ids[] = {
{ .compatible = "gdsys,soc" },
{ /* sentinel */ }
};
int gdsys_soc_get_fpga(struct udevice *child, struct udevice **fpga)
{
struct gdsys_soc_priv *bus_priv;
if (!child->parent) {
debug("%s: Invalid parent\n", child->name);
return -EINVAL;
}
if (!device_is_compatible(child->parent, "gdsys,soc")) {
debug("%s: Not child of a gdsys soc\n", child->name);
return -EINVAL;
}
bus_priv = dev_get_priv(child->parent);
*fpga = bus_priv->fpga;
return 0;
}
static int gdsys_soc_probe(struct udevice *dev)
{
struct gdsys_soc_priv *priv = dev_get_priv(dev);
struct udevice *fpga;
int res = uclass_get_device_by_phandle(UCLASS_MISC, dev, "fpga",
&fpga);
if (res == -ENOENT) {
debug("%s: Could not find 'fpga' phandle\n", dev->name);
return -EINVAL;
}
if (res == -ENODEV) {
debug("%s: Could not get FPGA device\n", dev->name);
return -EINVAL;
}
priv->fpga = fpga;
return 0;
}
U_BOOT_DRIVER(gdsys_soc_bus) = {
.name = "gdsys_soc_bus",
.id = UCLASS_SIMPLE_BUS,
.of_match = gdsys_soc_ids,
.probe = gdsys_soc_probe,
.priv_auto = sizeof(struct gdsys_soc_priv),
};
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