• Mark M. Hoffman's avatar
    [PATCH] i2c: Add lm78 sensor chip support · 7adb9a28
    Mark M. Hoffman authored
    This patch vs. 2.5.70 adds support for LM78, LM78-J, and LM79 sensors
    chips based on lm_sensors project CVS.  This works on one of my boards.
    
    I want to draw attention to something I did with this driver by
    comparing it to it87.c in 2.5.70:
    
    > #define IT87_INIT_TEMP_HIGH_1 600
    > #define IT87_INIT_TEMP_LOW_1  200
    
    The hardware uses degrees C, and sysfs uses degrees C * 1000.  But
    these #defines are apparently in units of degrees C * 10.  This
    arbitrary intermediate representation bugs me.  And given the new 2.5
    sysfs standard, it's unnecessary.
    
    In this patch for lm78, I rewrote the conversion routines in terms
    of the sysfs units - getting rid of the intermediate nonsense.  If
    there are no objections, I'm going to start passing patches to do
    this to the other sensor chip drivers in 2.5 as well.  It would be
    nice to get some help with this too... especially since I don't
    have all that hardware at hand to test the results.
    7adb9a28
lm78.c 28.3 KB