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authorPatrick Venture <venture@google.com>2017-09-11 15:41:55 -0700
committerGuenter Roeck <linux@roeck-us.net>2017-10-29 18:36:03 -0700
commit762b1e88801357770889d013c5d20fe110d1f456 (patch)
treee4db5c5231a055fa8086c62986faa76807d7617c /drivers/hwmon
parentfd53f62160e5fcea18f6adcddd40ba429dc127b6 (diff)
downloadlinux-762b1e88801357770889d013c5d20fe110d1f456.tar.bz2
hwmon: (aspeed-pwm-tacho) increase fan tach period
The previous value reduced the time required to determine the fan value, however, it's also used as the final timeout mechanism. The prevous value would work for any fan speed greater than around 3k RPM. This increased value, lets the fan speeds return quickly but will wait longer to handle speeds below 3k RPM. Testing: this value was determined through experimentation on the ast2400 on the Quanta-q71l. This configurations runs 8 fans attached to the controller. Signed-off-by: Patrick Venture <venture@google.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/aspeed-pwm-tacho.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hwmon/aspeed-pwm-tacho.c b/drivers/hwmon/aspeed-pwm-tacho.c
index 69b97d45e3cb..f914e5f41048 100644
--- a/drivers/hwmon/aspeed-pwm-tacho.c
+++ b/drivers/hwmon/aspeed-pwm-tacho.c
@@ -161,7 +161,7 @@
* 11: reserved.
*/
#define M_TACH_MODE 0x02 /* 10b */
-#define M_TACH_UNIT 0x00c0
+#define M_TACH_UNIT 0x0210
#define INIT_FAN_CTRL 0xFF
/* How long we sleep in us while waiting for an RPM result. */