From: Baskaran Kannan <bakannan@xxxxxxx>
Signed-off-by: Baskaran Kannan <Baski.Kannan@xxxxxxx>
---
drivers/hwmon/k10temp.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c
index 489ad0b1bc74..a79aac0596e5 100644
--- a/drivers/hwmon/k10temp.c
+++ b/drivers/hwmon/k10temp.c
@@ -77,6 +77,12 @@ static DEFINE_MUTEX(nb_smu_ind_mutex);
#define ZEN_CUR_TEMP_RANGE_SEL_MASK BIT(19)
#define ZEN_CUR_TEMP_TJ_SEL_MASK GENMASK(17, 16)
+/*
+ * AMD's Industrial processor 3255 supports temperature from -40 deg to 105 deg Celsius.
+ * Do not round off to zero for negative Tctl or Tdie values.
+ */
+#define AMD_I3255_STR "3255"
+
struct k10temp_data {
struct pci_dev *pdev;
void (*read_htcreg)(struct pci_dev *pdev, u32 *regval);
@@ -86,6 +92,7 @@ struct k10temp_data {
u32 show_temp;
bool is_zen;
u32 ccd_offset;
+ bool disp_negative; /*Flag set for AMD i3255. Family 17h, Model 0x0-0xf */
};
#define TCTL_BIT 0
@@ -204,9 +211,15 @@ static int k10temp_read_temp(struct device *dev, u32 attr, int channel,
switch (channel) {
case 0: /* Tctl */
*val = get_raw_temp(data);
+ if (*val < 0 && (data->disp_negative == false) ){
+ *val = 0;
+ }
break;
case 1: /* Tdie */
*val = get_raw_temp(data) - data->temp_offset;
+ if (*val < 0 && (data->disp_negative == false) ){
+ *val = 0;
+ }
break;
case 2 ... 13: /* Tccd{1-12} */
amd_smn_read(amd_pci_dev_to_node_id(data->pdev),
@@ -401,6 +414,11 @@ static int k10temp_probe(struct pci_dev *pdev, const struct pci_device_id *id)
data->pdev = pdev;
data->show_temp |= BIT(TCTL_BIT); /* Always show Tctl */
+ if (boot_cpu_data.x86 == 0x17 &&
+ strstr(boot_cpu_data.x86_model_id, AMD_I3255_STR)) {
+ data->disp_negative = true;
+ }
+
if (boot_cpu_data.x86 == 0x15 &&
((boot_cpu_data.x86_model & 0xf0) == 0x60 ||
(boot_cpu_data.x86_model & 0xf0) == 0x70)) {
--
2.25.1
