Re: [PATCH 3/7] thermal: mediatek: add calibration item

Eduardo Valentin
2019-02-06T00:49:04Z

On Mon, Feb 04, 2019 at 06:31:41PM +0100, Matthias Brugger wrote:
>
>
> On 01/02/2019 08:38, michael.kao@mediatek.com wrote:
> > From: Michael Kao <michael.kao@mediatek.com>
> >
> > Add calibration item in thermal_data to support
> > the project with different calibration coefficient.
> >
> > Signed-off-by: Michael Kao <michael.kao@mediatek.com>
> > ---
> > drivers/thermal/mtk_thermal.c | 19 ++++++++++++++++++-
> > 1 file changed, 18 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> > index 07f8ad7..45c6587 100644
> > --- a/drivers/thermal/mtk_thermal.c
> > +++ b/drivers/thermal/mtk_thermal.c
> > @@ -105,6 +105,9 @@
> > /* The number of sensing points per bank */
> > #define MT8173_NUM_SENSORS_PER_ZONE 4
> >
> > +/* The calibration coefficient of sensor */
> > +#define MT8173_CALIBRATION 165
> > +
>
> Calibration value is the same for all SoCs (including mt8183), we can define it
> once and use it in all mtk_thermal structs.

Well, on patch 7 we have:

+#define MT8183_CALIBRATION 153

>
> Regards,
> Matthias
>
>
> > /*
> > * Layout of the fuses providing the calibration data
> > * These macros could be used for MT8173, MT2701, and MT2712.
> > @@ -147,6 +150,9 @@ enum {
> > /* The number of sensing points per bank */
> > #define MT2701_NUM_SENSORS_PER_ZONE 3
> >
> > +/* The calibration coefficient of sensor */
> > +#define MT2701_CALIBRATION 165
> > +
> > /* MT2712 thermal sensors */
> > #define MT2712_TS1 0
> > #define MT2712_TS2 1
> > @@ -162,12 +168,18 @@ enum {
> > /* The number of sensing points per bank */
> > #define MT2712_NUM_SENSORS_PER_ZONE 4
> >
> > +/* The calibration coefficient of sensor */
> > +#define MT2712_CALIBRATION 165
> > +
> > #define MT7622_TEMP_AUXADC_CHANNEL 11
> > #define MT7622_NUM_SENSORS 1
> > #define MT7622_NUM_ZONES 1
> > #define MT7622_NUM_SENSORS_PER_ZONE 1
> > #define MT7622_TS1 0
> >
> > +/* The calibration coefficient of sensor */
> > +#define MT7622_CALIBRATION 165
> > +
> > struct mtk_thermal;
> >
> > struct thermal_bank_cfg {
> > @@ -188,6 +200,7 @@ struct mtk_thermal_data {
> > const int *sensor_mux_values;
> > const int *msr;
> > const int *adcpnp;
> > + const int cali_val;
> > struct thermal_bank_cfg bank_data[];
> > };
> >
> > @@ -295,6 +308,7 @@ struct mtk_thermal {
> > .num_banks = MT8173_NUM_ZONES,
> > .num_sensors = MT8173_NUM_SENSORS,
> > .vts_index = mt8173_vts_index,
> > + .cali_val = MT8173_CALIBRATION,
> > .bank_data = {
> > {
> > .num_sensors = 2,
> > @@ -330,6 +344,7 @@ struct mtk_thermal {
> > .num_banks = 1,
> > .num_sensors = MT2701_NUM_SENSORS,
> > .vts_index = mt2701_vts_index,
> > + .cali_val = MT2701_CALIBRATION,
> > .bank_data = {
> > {
> > .num_sensors = 3,
> > @@ -356,6 +371,7 @@ struct mtk_thermal {
> > .num_banks = 1,
> > .num_sensors = MT2712_NUM_SENSORS,
> > .vts_index = mt2712_vts_index,
> > + .cali_val = MT2712_CALIBRATION,
> > .bank_data = {
> > {
> > .num_sensors = 4,
> > @@ -376,6 +392,7 @@ struct mtk_thermal {
> > .num_banks = MT7622_NUM_ZONES,
> > .num_sensors = MT7622_NUM_SENSORS,
> > .vts_index = mt7622_vts_index,
> > + .cali_val = MT7622_CALIBRATION,
> > .bank_data = {
> > {
> > .num_sensors = 1,
> > @@ -402,7 +419,7 @@ static int raw_to_mcelsius(struct mtk_thermal *mt, int sensno, s32 raw)
> > raw &= 0xfff;
> >
> > tmp = 203450520 << 3;
> > - tmp /= 165 + mt->o_slope;
> > + tmp /= mt->conf->cali_val + mt->o_slope;
> > tmp /= 10000 + mt->adc_ge;
> > tmp *= raw - mt->vts[sensno] - 3350;
> > tmp >>= 3;
> >