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imx8m: fixup thermal trips

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Fixup thermal trips in Linux device tree according to SoC thermal
grade.

Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Tested-by: Adam Ford <aford173@gmail.com>
This commit is contained in:
Andrejs Cainikovs 2022-05-27 15:20:42 +02:00 • committed by Stefano Babic
parent bfa9306e14
commit 0543a1ed27
1 changed files with 49 additions and 0 deletions
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49
arch/arm/mach-imx/imx8m/soc.c
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@ -1203,6 +1203,48 @@ static int cleanup_nodes_for_efi(void *blob)
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;
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)
{
#ifdef CONFIG_IMX8MQ
@ -1345,6 +1387,13 @@ usb_modify_speed:
#endif
cleanup_nodes_for_efi(blob);
if (fixup_thermal_trips(blob, "cpu-thermal"))
printf("Failed to update cpu-thermal trip(s)");
if (IS_ENABLED(CONFIG_IMX8MP) &&
fixup_thermal_trips(blob, "soc-thermal"))
printf("Failed to update soc-thermal trip(s)");
return 0;
}
#endif