iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

hwmon: (k10temp) Add support for temperature offsets

Browse Source 
Add support for handling temperature offset values for various AMD CPUs,
similar to the code used in the coretemp driver for Intel CPUs. This is
primarily for Ryzen CPUs (which has documented temperature offsets),
but the code is kept generic to simplify adding additional CPUs.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2017-09-04 18:33:53 -07:00
parent 9af0a9aecd
commit 1b50b77635
1 changed files with 30 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/hwmon/k10temp.c
View File

@ -71,6 +71,24 @@ static DEFINE_MUTEX(nb_smu_ind_mutex);
struct k10temp_data {
struct pci_dev *pdev;
void (*read_tempreg)(struct pci_dev *pdev, u32 *regval);
int temp_offset;
};
struct tctl_offset {
u8 model;
char const *id;
int offset;
};
static const struct tctl_offset tctl_offset_table[] = {
{ 0x17, "AMD Ryzen 7 1600X", 20000 },
{ 0x17, "AMD Ryzen 7 1700X", 20000 },
{ 0x17, "AMD Ryzen 7 1800X", 20000 },
{ 0x17, "AMD Ryzen Threadripper 1950X", 27000 },
{ 0x17, "AMD Ryzen Threadripper 1920X", 27000 },
{ 0x17, "AMD Ryzen Threadripper 1950", 10000 },
{ 0x17, "AMD Ryzen Threadripper 1920", 10000 },
{ 0x17, "AMD Ryzen Threadripper 1910", 10000 },
};
static void read_tempreg_pci(struct pci_dev *pdev, u32 *regval)
@ -110,6 +128,7 @@ static ssize_t temp1_input_show(struct device *dev,
data->read_tempreg(data->pdev, &regval);
temp = (regval >> 21) * 125;
temp -= data->temp_offset;
return sprintf(buf, "%u\n", temp);
}
@ -217,6 +236,7 @@ static int k10temp_probe(struct pci_dev *pdev,
struct device *dev = &pdev->dev;
struct k10temp_data *data;
struct device *hwmon_dev;
int i;
if (unreliable) {
if (!force) {
@ -242,6 +262,16 @@ static int k10temp_probe(struct pci_dev *pdev,
else
data->read_tempreg = read_tempreg_pci;
for (i = 0; i < ARRAY_SIZE(tctl_offset_table); i++) {
const struct tctl_offset *entry = &tctl_offset_table[i];
if (boot_cpu_data.x86 == entry->model &&
strstr(boot_cpu_data.x86_model_id, entry->id)) {
data->temp_offset = entry->offset;
break;
}
}
hwmon_dev = devm_hwmon_device_register_with_groups(dev, "k10temp", data,
k10temp_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);