mirrors/u-boot
1
0
Fork 0
mirror of https://source.denx.de/u-boot/u-boot.git synced 2026-05-06 05:06:13 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

armv8/fsl-layerscape: fdt: Remove offline cores from cooling device maps

Browse Source 
Some processor families use a generic device tree, and rely on u-boot
fixups to massage that for lower core count personalities (i.e. NXP
LX2* family). For example, the LX2160A device tree will be used and
then modified to offline non-existent cores when running on an 8-core
LX2080A.

However, the cooling maps still contain references to the non-existent
core phandles, resulting in:

    OF: /thermal-zones/cluster6-7-thermal/cooling-maps/map0:
        could not find phandle 15

Rebuild the cooling maps as non-existent cores are deleted.

Signed-off-by: Anthony Pighin <anthony.pighin@nokia.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Anthony Pighin (Nokia) 2025-12-03 16:25:39 +00:00 committed by Peng Fan
parent e672d4a472
commit ff7c10d89b
1 changed files with 57 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
arch/arm/cpu/armv8/fsl-layerscape/fdt.c
View File

@ -12,6 +12,7 @@
#include <asm/cache.h>
#include <linux/libfdt.h>
#include <fdt_support.h>
#include <malloc.h>
#include <phy.h>
#ifdef CONFIG_FSL_LSCH3
#include <asm/arch/fdt.h>
@ -48,6 +49,61 @@ int fdt_fixup_phy_connection(void *blob, int offset, phy_interface_t phyc)
}
#ifdef CONFIG_MP
static void fdt_fixup_thermal_cooling_device(void *blob, int cpu_off)
{
int cnt, idx, len;
int map, maps;
int offline, phandle;
int ret;
int zone, zones;
u32 *tbl;
struct fdtdec_phandle_args dev;
zones = fdt_subnode_offset(blob, 0, "thermal-zones");
if (zones < 0)
return;
offline = fdt_get_phandle(blob, cpu_off);
fdt_for_each_subnode(zone, blob, zones) {
maps = fdt_subnode_offset(blob, zone, "cooling-maps");
if (maps < 0)
continue;
fdt_for_each_subnode(map, blob, maps) {
if (!fdt_getprop(blob, map, "cooling-device", &len))
continue;
cnt = fdtdec_parse_phandle_with_args(blob, map,
"cooling-device",
"#cooling-cells",
0, -1, NULL);
if (cnt <= 0)
continue;
tbl = (u32 *)malloc(len);
if (!tbl)
return;
idx = 0;
for (int i = 0; i < cnt; i++) {
ret = fdtdec_parse_phandle_with_args(blob, map,
"cooling-device",
"#cooling-cells",
0, i,
&dev);
if (ret < 0)
goto skip_update;
phandle = fdt_get_phandle(blob, dev.node);
if (phandle == offline)
continue;
tbl[idx++] = cpu_to_fdt32(phandle);
for (int j = 0; j < dev.args_count; j++)
tbl[idx++] = cpu_to_fdt32(dev.args[j]);
}
fdt_setprop(blob, map, "cooling-device", tbl,
(idx*sizeof(*tbl)));
skip_update:
free(tbl);
}
}
}
void ft_fixup_cpu(void *blob)
{
int off;
@ -73,6 +129,7 @@ void ft_fixup_cpu(void *blob)
if (reg) {
core_id = fdt_read_number(reg, addr_cells);
if (!test_bit(id_to_core(core_id), &mask)) {
fdt_fixup_thermal_cooling_device(blob, off);
fdt_del_node(blob, off);
off = off_prev;
}