hwmon: (coretemp) Improve support for TjMax detection on Atom CPUs
Atom CPUs don't have a register to retrieve TjMax. Detection so far was
incomplete. Use the X86 model ID to improve it.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 42c2f43..2271683 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -191,6 +191,24 @@
return tdata->valid ? sprintf(buf, "%d\n", tdata->temp) : -EAGAIN;
}
+struct tjmax {
+ char const *id;
+ int tjmax;
+};
+
+static struct tjmax __cpuinitconst tjmax_table[] = {
+ { "CPU D410", 100000 },
+ { "CPU D425", 100000 },
+ { "CPU D510", 100000 },
+ { "CPU D525", 100000 },
+ { "CPU N450", 100000 },
+ { "CPU N455", 100000 },
+ { "CPU N470", 100000 },
+ { "CPU N475", 100000 },
+ { "CPU 230", 100000 },
+ { "CPU 330", 125000 },
+};
+
static int __cpuinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id,
struct device *dev)
{
@@ -202,6 +220,13 @@
int err;
u32 eax, edx;
struct pci_dev *host_bridge;
+ int i;
+
+ /* explicit tjmax table entries override heuristics */
+ for (i = 0; i < ARRAY_SIZE(tjmax_table); i++) {
+ if (strstr(c->x86_model_id, tjmax_table[i].id))
+ return tjmax_table[i].tjmax;
+ }
/* Early chips have no MSR for TjMax */