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// SPDX-License-Identifier: GPL-2.0+
/*
* Calxeda Highbank/Midway "system registers" bus driver
*
* There is a "clocks" subnode inside the top node, which groups all clocks,
* both programmable PLLs as well as fixed clocks.
* Simple allow the DT enumeration to look inside this node, so that we can
* read the fixed clock frequencies using the DM clock framework.
*
* Copyright (C) 2019 Arm Ltd.
*/
#include <common.h>
#include <dm.h>
#include <dm/lists.h>
static int hb_sregs_scan_fdt_dev(struct udevice *dev)
{
ofnode clock_node, node;
/* Search for subnode called "clocks". */
ofnode_for_each_subnode(clock_node, dev_ofnode(dev)) {
if (!ofnode_name_eq(clock_node, "clocks"))
continue;
/* Enumerate all nodes inside this "clocks" subnode. */
ofnode_for_each_subnode(node, clock_node)
lists_bind_fdt(dev, node, NULL, NULL, false);
return 0;
}
return -ENOENT;
}
static const struct udevice_id highbank_sreg_ids[] = {
{ .compatible = "calxeda,hb-sregs" },
{}
};
U_BOOT_DRIVER(hb_sregs) = {
.name = "hb-sregs",
.id = UCLASS_SIMPLE_BUS,
.bind = hb_sregs_scan_fdt_dev,
.of_match = highbank_sreg_ids,
};
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