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arm: mach-k3: am62p: fixup thermal cooling device by cpu number

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TI AM62Px devices support CPU throttling based on thermal alerts.
However, the device tree assumes a 4-core configuration. Since the AM62P
also supports 2-core configurations, add a fixup to dynamically adjust
the cooling-device nodes within thermal zones based on the actual number
of CPU cores available.

Signed-off-by: João Paulo Gonçalves <joao.goncalves@toradex.com>
This commit is contained in:
João Paulo Gonçalves
2025-06-23 14:39:56 -03:00
committed by Tom Rini
parent 9e672e4260
commit 7f4baa866d
1 changed files with 37 additions and 0 deletions
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37
arch/arm/mach-k3/am62px/am62p5_fdt.c
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@@ -6,6 +6,7 @@
#include <asm/arch/k3-common-fdt.h>
#include <asm/hardware.h>
#include <fdt_support.h>
#include <fdtdec.h>
static void fdt_fixup_cores_wdt_nodes_am62p(void *blob, int core_nr)
{
@@ -49,12 +50,48 @@ static void fdt_fixup_cpu_freq_nodes_am62p(void *blob, int max_freq)
}
}
static void fdt_fixup_thermal_cooling_device_cpus_am62p(void *blob, int core_nr)
{
static const char * const thermal_path[] = {
"/thermal-zones/main0-thermal/cooling-maps/map0",
"/thermal-zones/main1-thermal/cooling-maps/map0",
"/thermal-zones/main2-thermal/cooling-maps/map0"
};
int node, cnt, i, ret;
u32 cooling_dev[12];
for (i = 0; i < ARRAY_SIZE(thermal_path); i++) {
int new_count = core_nr * 3; /* Each CPU has 3 entries */
int j;
node = fdt_path_offset(blob, thermal_path[i]);
if (node < 0)
continue;
cnt = fdtdec_get_int_array_count(blob, node, "cooling-device",
cooling_dev, ARRAY_SIZE(cooling_dev));
if (cnt < 0)
continue;
for (j = 0; j < new_count; j++)
cooling_dev[j] = cpu_to_fdt32(cooling_dev[j]);
ret = fdt_setprop(blob, node, "cooling-device", cooling_dev,
new_count * sizeof(u32));
if (ret < 0)
printf("Error %s, cooling-device setprop failed %d\n",
thermal_path[i], ret);
}
}
int ft_system_setup(void *blob, struct bd_info *bd)
{
fdt_fixup_cores_wdt_nodes_am62p(blob, k3_get_core_nr());
fdt_fixup_video_codec_nodes_am62p(blob, k3_has_video_codec());
fdt_fixup_canfd_nodes_am62p(blob, k3_has_canfd());
fdt_fixup_thermal_critical_trips_k3(blob, k3_get_max_temp());
fdt_fixup_thermal_cooling_device_cpus_am62p(blob, k3_get_core_nr());
fdt_fixup_cpu_freq_nodes_am62p(blob, k3_get_a53_max_frequency());
fdt_fixup_reserved(blob, "tfa", CONFIG_K3_ATF_LOAD_ADDR, 0x80000);
fdt_fixup_reserved(blob, "optee", CONFIG_K3_OPTEE_LOAD_ADDR, 0x1800000);