On MSM8939 the last sensor has calibration data that cannot be extracted in
one big read.
Rather than have a lot of MSM8939 specific code this series makes a generic
modification to allow any other calibration data that is non-contiguous to
be extracted and recovered.
For example s9-p2 takes bits 1-5 from @4b and bit 13 from @4d. The bit from
bit13 then becomes the sixth bit in the calibration data.
tsens_s9_p2: s9-p2@4b {
reg = <0x4b 0x1>;
bits = <1 5>;
};
tsens_s9_p2_msb: s9-p2-msb@4d {
reg = <0x4d 0x1>;
bits = <13 1>;
};
A register desciptor is introduced in the driver which takes the place of
the previous unsigned int hw_ids array in struct tsens_plat_data.
This new structure contains the previous hardware id and two variables
p1_shift and p2_shift.
If p1_shift or p2_shift is non-zero then this tells
tsens_read_calibration() to search for sX-pY-msb where msb means "most
significant bits".
The value at p1_shift/p2_shift is then used to right shift the value read
from sX-pY-msb and or that value into the base value from sX-pY.
The nvmem 'bits' field provides the mask.
Bryan O'Donoghue (3):
thermal/drivers/tsens: Add error/debug prints to calibration read
thermal/drivers/tsens: Describe sensor registers via a structure
thermal/drivers/tsens: Extract and shift-in optional MSB
drivers/thermal/qcom/tsens-v0_1.c | 56 +++++++++++++++++++++++++++++--
drivers/thermal/qcom/tsens.c | 50 ++++++++++++++++++++++++---
drivers/thermal/qcom/tsens.h | 16 ++++++++-
3 files changed, 115 insertions(+), 7 deletions(-)
--
2.39.2
