imx8m: fixup thermal trips
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>
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index 5933535..e4e5607 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -1203,6 +1203,48 @@
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 @@
#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