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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2024 NXP
*/
#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
#include <asm/arch/sys_proto.h>
static void disable_thermal_cpu_nodes(void *blob, u32 num_disabled_cores, u32 max_cores)
{
static const char * const thermal_path[] = {
"/thermal-zones/cpu-thermal/cooling-maps/map0"
};
int nodeoff, cnt, i, ret, j;
u32 num_le32 = max_cores * 3;
u32 *cooling_dev = (u32 *)malloc(num_le32 * sizeof(__le32));
if (!cooling_dev) {
printf("failed to alloc cooling dev\n");
return;
}
for (i = 0; i < ARRAY_SIZE(thermal_path); i++) {
nodeoff = fdt_path_offset(blob, thermal_path[i]);
if (nodeoff < 0)
continue; /* Not found, skip it */
cnt = fdtdec_get_int_array_count(blob, nodeoff, "cooling-device",
cooling_dev, num_le32);
if (cnt < 0)
continue;
if (cnt != num_le32)
printf("Warning: %s, cooling-device count %d\n", thermal_path[i], cnt);
for (j = 0; j < cnt; j++)
cooling_dev[j] = cpu_to_fdt32(cooling_dev[j]);
ret = fdt_setprop(blob, nodeoff, "cooling-device", &cooling_dev,
sizeof(__le32) * (num_le32 - num_disabled_cores * 3));
if (ret < 0) {
printf("Warning: %s, cooling-device setprop failed %d\n",
thermal_path[i], ret);
continue;
}
printf("Update node %s, cooling-device prop\n", thermal_path[i]);
}
free(cooling_dev);
}
int disable_cpu_nodes(void *blob, const char * const *nodes_path, u32 num_disabled_cores,
u32 max_cores)
{
u32 i = 0;
int rc;
int nodeoff;
if (max_cores == 0 || (num_disabled_cores > (max_cores - 1)))
return -EINVAL;
i = max_cores - num_disabled_cores;
for (; i < max_cores; i++) {
nodeoff = fdt_path_offset(blob, nodes_path[i]);
if (nodeoff < 0)
continue; /* Not found, skip it */
debug("Found %s node\n", nodes_path[i]);
rc = fdt_del_node(blob, nodeoff);
if (rc < 0) {
printf("Unable to delete node %s, err=%s\n",
nodes_path[i], fdt_strerror(rc));
} else {
printf("Delete node %s\n", nodes_path[i]);
}
}
disable_thermal_cpu_nodes(blob, num_disabled_cores, max_cores);
return 0;
}
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