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