diff options
| author |   Ezequiel Garcia <ezequiel.garcia@free-electrons.com> | 2014-05-06 13:59:49 -0300 |
|---|---|---|
| committer |   Zhang Rui <rui.zhang@intel.com> | 2014-05-15 17:12:48 +0800 |
| commit | fd2c94d5a32297c63b025b54b71aa24ccc0596ed (patch) | |
| tree | 62fb40a3d929a24e18aa4272ec7a24df39405df6 /drivers/thermal/armada_thermal.c | |
| parent | thermal: armada: Pass the platform_device to init_sensor() (diff) | |
| download | linux-dev-fd2c94d5a32297c63b025b54b71aa24ccc0596ed.tar.xz linux-dev-fd2c94d5a32297c63b025b54b71aa24ccc0596ed.zip | |
thermal: armada: Allow to specify an 'inverted readout' sensor
In order to support inverted-formula thermal sensor readout, this commit
introduces an 'inverted' field in the SoC-specific structure which
allows to specify an inversion of the temperature formula.
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal/armada_thermal.c')
| -rw-r--r-- | drivers/thermal/armada_thermal.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c index 6fd648337e63..f84d9f077fe2 100644 --- a/drivers/thermal/armada_thermal.c +++ b/drivers/thermal/armada_thermal.c @@ -56,6 +56,7 @@ struct armada_thermal_data { unsigned long coef_b; unsigned long coef_m; unsigned long coef_div; + bool inverted; /* Register shift and mask to access the sensor temperature */ unsigned int temp_shift; @@ -138,7 +139,10 @@ static int armada_get_temp(struct thermal_zone_device *thermal, m = priv->data->coef_m; div = priv->data->coef_div; - *temp = (b - (m * reg)) / div; + if (priv->data->inverted) + *temp = ((m * reg) - b) / div; + else + *temp = (b - (m * reg)) / div; return 0; } |