[PATCH 2/3] hwmon: Driver for OMAP3 temperature sensor

Pavel Machek pavel at ucw.cz
Sat Dec 27 11:24:31 PST 2014


> OMAP34xx and OMAP36xx processors contain a register in the syscon area,
> which can be used to determine the SoCs temperature. This patch provides
> a DT based driver for the temperature sensor based on an older driver
> written by Peter De Schrijver for the Nokia N900 and N9.
> Signed-off-by: Sebastian Reichel <sre at kernel.org>

I did clk_enable -> clk_prepare_enable conversion, as described in
another email.

I got occasional error reading:

root at n900:~# cat /sys/class/hwmon/hwmon0/device/temp_input
root at n900:~# cat /sys/class/hwmon/hwmon0/device/temp_input
cat: /sys/class/hwmon/hwmon0/device/temp_input: Input/output error
root at n900:~# cat /sys/class/hwmon/hwmon0/device/temp_input

Nothing in dmesg. It takes few tries to reproduce..

On other attempt, it hung hard:

root at n900:~# cat /sys/class/hwmon/hwmon0/device/temp_input ; cat
/sys/class/hwmon/hwmon0/device/temp_input  ;cat
/sys/class/hwmon/hwmon0/device/temp_input ; cat



Best regards,
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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