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 --- arch/arm/mach-imx/imx8m/soc.c | 49 +++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+)
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index 59335356b5..e4e56079cf 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -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