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imx: imx9: fixup thermal trips from fuses

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Read i.MX9 CPU temp grade from fuses and fixup thermal trips in Linux
device-tree accordingly.

Based on commit 0543a1ed27 ("imx8m: fixup thermal trips")

Signed-off-by: Primoz Fiser <primoz.fiser@norik.com>
This commit is contained in:
Primoz Fiser 2024-01-11 13:56:25 +01:00 committed by Fabio Estevam
parent 0e00632a83
commit 3233349fa6
1 changed files with 45 additions and 0 deletions
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45
arch/arm/mach-imx/imx9/soc.c
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@ -507,8 +507,53 @@ int print_cpuinfo(void)
return 0;
}
static int fixup_thermal_trips(void *blob, const char *name)
{
int minc, maxc;
int node, trip;
node = fdt_path_offset(blob, "/thermal-zones");
if (node < 0)
return node;
node = fdt_subnode_offset(blob, node, name);
if (node < 0)
return node;
node = fdt_subnode_offset(blob, node, "trips");
if (node < 0)
return node;
get_cpu_temp_grade(&minc, &maxc);
fdt_for_each_subnode(trip, blob, node) {
const char *type;
int temp, ret;
type = fdt_getprop(blob, trip, "type", NULL);
if (!type)
continue;
temp = 0;
if (!strcmp(type, "critical"))
temp = 1000 * (maxc - 5);
else if (!strcmp(type, "passive"))
temp = 1000 * (maxc - 10);
if (temp) {
ret = fdt_setprop_u32(blob, trip, "temperature", temp);
if (ret)
return ret;
}
}
return 0;
}
int ft_system_setup(void *blob, struct bd_info *bd)
{
if (fixup_thermal_trips(blob, "cpu-thermal"))
printf("Failed to update cpu-thermal trip(s)");
return 0;
}