This is a note to let you know that I've just added the patch titled
hwmon: (coretemp) Improve support for TjMax detection on Atom CPUs
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hwmon-coretemp-improve-support-for-tjmax-detection-on-atom-cpus.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 41e58a1f2b90c88d94b4bd84beb9927a4c2704e9 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@xxxxxxxxxxxx>
Date: Sun, 17 Jun 2012 18:05:05 +0200
Subject: hwmon: (coretemp) Improve support for TjMax detection on Atom CPUs
From: Guenter Roeck <linux@xxxxxxxxxxxx>
commit 41e58a1f2b90c88d94b4bd84beb9927a4c2704e9 upstream.
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@xxxxxxxxxxxx>
Signed-off-by: Jean Delvare <khali@xxxxxxxxxxxx>
Cc: Qiang Huang <h.huangqiang@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hwmon/coretemp.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -191,6 +191,24 @@ static ssize_t show_temp(struct device *
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 @@ static int __cpuinit adjust_tjmax(struct
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 */
Patches currently in stable-queue which might be from linux@xxxxxxxxxxxx are
queue-3.4/hwmon-coretemp-add-support-for-atom-d2000-and-n2000-series-cpu-models.patch
queue-3.4/hwmon-applesmc-always-read-until-end-of-data.patch
queue-3.4/hwmon-coretemp-add-support-for-atom-ce4110-4150-4170.patch
queue-3.4/hwmon-coretemp-improve-support-for-tjmax-detection-on-atom-cpus.patch
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