01 Jul, 2014
1 commit
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On latest i.MX6 SOC with thermal calibration data of 0x5A100000,
the critical trip temperature will be an invalid value and
cause system auto shutdown as below log:thermal thermal_zone0: critical temperature reached(42 C),shutting down
So, with universal formula for thermal sensor, only room
temperature point is calibrated, which means the calibration
data read from fuse only has valid data of bit [31:20], others
are all 0, the critical trip point temperature can NOT depend
on the hot point calibration data, here we set it to 20 C higher
than default passive temperature.Signed-off-by: Anson Huang
Acked-by: Shawn Guo
Signed-off-by: Zhang Rui
08 Apr, 2014
1 commit
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Thermal sensor used to need two calibration points which are
in fuse map to get a slope for converting thermal sensor's raw
data to real temperature in degree C. Due to the chip calibration
limitation, hardware team provides an universal formula to get
real temperature from internal thermal sensor raw data:Slope = 0.4297157 - (0.0015976 * 25C fuse);
Update the formula, as there will be no hot point calibration
data in fuse map from now on.Signed-off-by: Anson Huang
Acked-by: Shawn Guo
Signed-off-by: Zhang Rui
06 Jan, 2014
2 commits
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As per previous changes on thermal framework API,
registering a new thermal zone does not require
a const thermal zone ops.Thus, this patch removes the flag from imx thermal zone ops.
Cc: Zhang Rui
Cc: Grant Likely
Cc: Rob Herring
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Signed-off-by: Eduardo Valentin
Signed-off-by: Zhang Rui
03 Jan, 2014
1 commit
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Thermal sensor needs pll3_usb_otg when measuring temperature,
otherwise the temperature read will be incorrect, so need to
enable this clk before sensor working, for alarm function,
as hardware will take measurement periodically, so we should
keep this clk always on once alarm function is enabled.Signed-off-by: Anson Huang
Acked-by: Shawn Guo
Signed-off-by: Zhang Rui
02 Jan, 2014
2 commits
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Add the module device table declaration so the module can be loaded
automatically at boot time.Signed-off-by: Russell King
Acked-by: Shawn Guo
Acked-by: Eduardo Valentin
Signed-off-by: Zhang Rui -
Fixes regression introduced by:
commit 37713a1e8e4c1a1067ad4c99296f78d3c82ed9c4
Author: Philipp Zabel
Date: Thu Aug 1 18:33:12 2013 +0200thermal: imx: implement thermal alarm interrupt handling
The commit 37713a1e8e4 makes imx thermal sensor always powered up as alarm
function is enabled, but the suspend callback of imx thermal returns
success only if thermal sensor is powered down, so it will always returns
fail hence break system's suspend, this patch disables imx thermal sensor
before suspend and re-enable it after resume.Signed-off-by: Anson Huang
Acked-by: Shawn Guo
Signed-off-by: Zhang Rui
15 Aug, 2013
2 commits
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Enable automatic measurements at 10 Hz and use the alarm interrupt to react
more quickly to sudden temperature changes above the passive or critical
temperature trip points.Signed-off-by: Philipp Zabel
Acked-by: Shawn Guo
Signed-off-by: Zhang Rui -
Set passive and critical trip point values depending on the maximum die
temperature stored in the OCOTP fuses. This allows higher trip points
for industrial and automotive rated i.MX6 SoCs.
Also allow to configure the passive trip point from userspace.Signed-off-by: Philipp Zabel
Acked-by: Shawn Guo
Signed-off-by: Zhang Rui
13 Aug, 2013
1 commit
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This is based on the initial imx thermal work done by
Rob Lee (Not sure if the email address is still
valid). Since he is no longer interested in the work and I have
rewritten a significant amount of the code, I just took the authorship
over from him.It adds the imx thermal support using Temperature Monitor (TEMPMON)
block found on some Freescale i.MX SoCs. The driver uses syscon regmap
interface to access TEMPMON control registers and calibration data, and
supports cpufreq as the cooling device.Signed-off-by: Shawn Guo
Signed-off-by: Eduardo Valentin
