platform: mips: cpu_hwmon: Disable driver on unsupported hardware

commit f4d430d upstream. cpu_hwmon is unsupported on CPUs without loongson_chiptemp register and csr. Cc: [email protected] Signed-off-by: Jiaxun Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
Kaz205 · Jul 31, 2024 · 2146177 · 2146177
1 parent 21bd5c7
commit 2146177
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/platform/mips/cpu_hwmon.c b/drivers/platform/mips/cpu_hwmon.c
@@ -139,6 +139,9 @@ static int __init loongson_hwmon_init(void)
 		csr_temp_enable = csr_readl(LOONGSON_CSR_FEATURES) &
 				  LOONGSON_CSRF_TEMP;
 
+	if (!csr_temp_enable && !loongson_chiptemp[0])
+		return -ENODEV;
+
 	nr_packages = loongson_sysconf.nr_cpus /
 		loongson_sysconf.cores_per_package;