On 8/19/2022 2:11 AM, Guenter Roeck wrote:
On Wed, Aug 17, 2022 at 05:43:21AM +0000, Eliav Farber wrote:
This change adds debugfs to read and write TS coefficients - g, h, j and
cal5.
The coefficients can vary between product and product, so to calibrate
them it can be very useful to to be able to modify them on the fly.
e.g.
cat /sys/kernel/debug/940f23d0000.pvt/ts_coeff_cal5
4096
echo 83000 > sys/kernel/debug/940f23d0000.pvt/ts_coeff_g
What happens if you write 0 into all those attributes, or 0xffffffff ?
The driver equation is:
T = G + H * (n / cal5 - 0.5) + J * F
So I added protection for cal5 not being 0.
Besides that there is no limitation on what these values can be.
I can't really think of any other logical limitation I can apply.
--
Regards, Eliav
