diff options
| author | Angus Ainslie <angus@akkea.ca> | 2021-11-18 19:18:45 +0300 |
|---|---|---|
| committer | Sebastian Reichel <sebastian.reichel@collabora.com> | 2021-12-02 20:27:06 +0300 |
| commit | 9652c02428f3992129b73321fee32fe60b77c90f (patch) | |
| tree | bbc4e41c7b064d2a6ee4166217aac6244cd666ae /drivers/power/supply/bq25890_charger.c | |
| parent | 0838a3bfcd1b0c8d2ce38afcc94b81920486dabd (diff) | |
| download | linux-9652c02428f3992129b73321fee32fe60b77c90f.tar.xz | |
power: bq25890: add POWER_SUPPLY_PROP_TEMP
Add the POWER_SUPPLY_PROP_TEMP and a NTC 10K percent VREGN to degrees LUT.
Make sure that a conversion is forced when the power supply is offline so
the temperature is valid.
Signed-off-by: Angus Ainslie <angus@akkea.ca>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power/supply/bq25890_charger.c')
| -rw-r--r-- | drivers/power/supply/bq25890_charger.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c index 34ec186a2e9a..78da6e7a8b5b 100644 --- a/drivers/power/supply/bq25890_charger.c +++ b/drivers/power/supply/bq25890_charger.c @@ -266,6 +266,7 @@ enum bq25890_table_ids { /* lookup tables */ TBL_TREG, TBL_BOOSTI, + TBL_TSPCT, }; /* Thermal Regulation Threshold lookup table, in degrees Celsius */ @@ -280,6 +281,28 @@ static const u32 bq25890_boosti_tbl[] = { #define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl) +/* NTC 10K temperature lookup table in tenths of a degree */ +static const u32 bq25890_tspct_tbl[] = { + 850, 840, 830, 820, 810, 800, 790, 780, + 770, 760, 750, 740, 730, 720, 710, 700, + 690, 685, 680, 675, 670, 660, 650, 645, + 640, 630, 620, 615, 610, 600, 590, 585, + 580, 570, 565, 560, 550, 540, 535, 530, + 520, 515, 510, 500, 495, 490, 480, 475, + 470, 460, 455, 450, 440, 435, 430, 425, + 420, 410, 405, 400, 390, 385, 380, 370, + 365, 360, 355, 350, 340, 335, 330, 320, + 310, 305, 300, 290, 285, 280, 275, 270, + 260, 250, 245, 240, 230, 225, 220, 210, + 205, 200, 190, 180, 175, 170, 160, 150, + 145, 140, 130, 120, 115, 110, 100, 90, + 80, 70, 60, 50, 40, 30, 20, 10, + 0, -10, -20, -30, -40, -60, -70, -80, + -90, -10, -120, -140, -150, -170, -190, -210, +}; + +#define BQ25890_TSPCT_TBL_SIZE ARRAY_SIZE(bq25890_tspct_tbl) + struct bq25890_range { u32 min; u32 max; @@ -308,7 +331,8 @@ static const union { /* lookup tables */ [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} }, - [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} } + [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} }, + [TBL_TSPCT] = { .lt = {bq25890_tspct_tbl, BQ25890_TSPCT_TBL_SIZE} } }; static int bq25890_field_read(struct bq25890_device *bq, @@ -388,6 +412,7 @@ static bool bq25890_is_adc_property(enum power_supply_property psp) switch (psp) { case POWER_SUPPLY_PROP_VOLTAGE_NOW: case POWER_SUPPLY_PROP_CURRENT_NOW: + case POWER_SUPPLY_PROP_TEMP: return true; default: @@ -528,6 +553,15 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, val->intval = ret * -50000; break; + case POWER_SUPPLY_PROP_TEMP: + ret = bq25890_field_read(bq, F_TSPCT); + if (ret < 0) + return ret; + + /* convert TS percentage into rough temperature */ + val->intval = bq25890_find_val(ret, TBL_TSPCT); + break; + default: return -EINVAL; } @@ -713,6 +747,7 @@ static const enum power_supply_property bq25890_power_supply_props[] = { POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_TEMP, }; static char *bq25890_charger_supplied_to[] = { |