[PATCH 07/10] platform: mips: cpu_hwmon: Disable driver on unsupported hardware

[Jiaxun Yang]

cpu_hwmon is unsupported on CPUs without loongson_chiptemp
register and csr.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
---
 drivers/platform/mips/cpu_hwmon.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/platform/mips/cpu_hwmon.c b/drivers/platform/mips/cpu_hwmon.c
index d8c5f9195f85..2ac2f31090f9 100644
--- 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;
 

-- 
2.43.0