Meson8b and Meson8m2 use a 5-bit wide TSC (temperature sensor coefficient). The SAR ADC registers however can only store (the lower) 4 bits. The fifth (upper-most) bit is stored inside the MESON_HHI_DPLL_TOP_0[9] register from the HHI register area. This adds a syscon property to the HHI register area so a driver can fetch the HHI register map and store the fifth TSC bit in there. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> --- .../devicetree/bindings/iio/adc/amlogic,meson-saradc.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt index 325090e43ce6..75c775954102 100644 --- a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt +++ b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt @@ -23,6 +23,10 @@ Required properties: - #io-channel-cells: must be 1, see ../iio-bindings.txt Optional properties: +- amlogic,hhi-sysctrl: phandle to the syscon which contains the 5th bit + of the TSC (temperature sensor coefficient) on + Meson8b and Meson8m2 (which used to calibrate the + temperature sensor) - nvmem-cells: phandle to the temperature_calib eFuse cells - nvmem-cell-names: if present (to enable the temperature sensor calibration) this must contain "temperature_calib" -- 2.20.1
