mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-23 03:23:47 +00:00
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
|
// 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,
|
||
|
|
};
|