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| author | Guenter Roeck <linux@roeck-us.net> | 2012-10-09 12:45:23 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2012-12-05 10:55:55 -0800 |
| commit | 2fa5222efeb4a76597ceace21c0435d49a34715e (patch) | |
| tree | 67381036996eba50dab2ff07cceeb580876cfa33 | |
| parent | d9b24e373d160ffd56633cc9a4b2e4013c2682d1 (diff) | |
| download | linux-2fa5222efeb4a76597ceace21c0435d49a34715e.tar.gz linux-2fa5222efeb4a76597ceace21c0435d49a34715e.tar.bz2 linux-2fa5222efeb4a76597ceace21c0435d49a34715e.zip | |
hwmon: (coretemp) Use model table instead of if/else to identify CPU models
Make the code easier to extend and easier to adjust by using a model table
listing CPU models, stepping/mask, and associated TjMax.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
| -rw-r--r-- | drivers/hwmon/coretemp.c | 41 |
1 files changed, 27 insertions, 14 deletions
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index 1653d0ddd1d0..81c248dad4ba 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -211,6 +211,28 @@ static const struct tjmax __cpuinitconst tjmax_table[] = { { "CPU CE4170", 110000 }, /* Model 0x1c, stepping 10 */ }; +struct tjmax_model { + u8 model; + u8 mask; + int tjmax; +}; + +#define ANY 0xff + +static const struct tjmax_model __cpuinitconst tjmax_model_table[] = { + { 0x1c, 10, 100000 }, /* D4xx, N4xx, D5xx, N5xx */ + { 0x1c, ANY, 90000 }, /* Z5xx, N2xx, possibly others + * Note: Also matches 230 and 330, + * which are covered by tjmax_table + */ + { 0x26, ANY, 90000 }, /* Atom Tunnel Creek (Exx), Lincroft (Z6xx) + * Note: TjMax for E6xxT is 110C, but CPU type + * is undetectable by software + */ + { 0x27, ANY, 90000 }, /* Atom Medfield (Z2460) */ + { 0x36, ANY, 100000 }, /* Atom Cedar Trail/Cedarview (N2xxx, D2xxx) */ +}; + static int __cpuinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device *dev) { @@ -229,20 +251,11 @@ static int __cpuinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, return tjmax_table[i].tjmax; } - /* Atom CPUs */ - - if (c->x86_model == 0x1c) { - /* - * TjMax for stepping 10 CPUs (N4xx, N5xx, D4xx, D5xx) - * is 100 degrees C, for all others it is 90 degrees C. - */ - if (c->x86_mask == 10) - return 100000; - return 90000; - } else if (c->x86_model == 0x26 || c->x86_model == 0x27) { - return 90000; - } else if (c->x86_model == 0x36) { - return 100000; + for (i = 0; i < ARRAY_SIZE(tjmax_model_table); i++) { + const struct tjmax_model *tm = &tjmax_model_table[i]; + if (c->x86_model == tm->model && + (tm->mask == ANY || c->x86_mask == tm->mask)) + return tm->tjmax; } /* Early chips have no MSR for TjMax */ |