guenter, i want to use these three tmp102 temp1_input, max and max_hys in dsi2hdmi(adv7533) driver to enable or disabled based on temperature range. https://github.com/vinaysimha/kernel-msm/commit/8ee2b9104fa56765320d4846086d91b8271f5609 dsi2hdmi operating temperature range is -10 to 85 deg C, we will enable dsi2hdmi only when temperate in operating range otherwise will disable the chip. On Thu, Feb 21, 2019 at 11:25 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > > On Thu, Feb 21, 2019 at 08:21:09PM +0530, Vinay Simha B N wrote: > > hi, > > > > could you please suggest, how to export_symbol the tmp102 temp1_input, max > > and max_hyst values to another kernel driver? > > > > We can acess the values > > from filp_open("/sys/class/hwmon/hwmon1/temp1_input", O_RDONLY, 0); in > > kernel space, but is there better apporach to access the values in the > > kernel space. > > > There is no in-kernel API to do that, and I do not immediately see > the purpose. Either case, accessing the sysfs attribute directly is > as wrong as it can get, if for nothing else since there is no guarantee > that this will always be the hwmon1 device. > > Can you explain what you are trying to do ? > > Thanks, > Guenter -- regards, vinaysimha
