From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Angus Ainslie (Purism)" Subject: [PATCH v2 4/4] power: bq25890_charger.c: Read back the current battery voltage Date: Wed, 25 Jul 2018 13:46:30 -0600 Message-ID: <20180725194630.10414-5-angus@akkea.ca> References: <20180725194630.10414-1-angus@akkea.ca> Return-path: In-Reply-To: <20180725194630.10414-1-angus@akkea.ca> Sender: linux-kernel-owner@vger.kernel.org To: Krzysztof Kozlowski Cc: angus.ainslie@puri.sm, Sebastian Reichel , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, "Angus Ainslie (Purism)" List-Id: linux-pm@vger.kernel.org The part has the capability of reading the current battery voltage Signed-off-by: Angus Ainslie (Purism) --- drivers/power/supply/bq25890_charger.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c index f4cf2987996b..60ccd6c2b7ad 100644 --- a/drivers/power/supply/bq25890_charger.c +++ b/drivers/power/supply/bq25890_charger.c @@ -464,6 +464,20 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM); break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + if (!state.online) { + val->intval = 0; + break; + } + + ret = bq25890_field_read(bq, F_SYSV); /* read measured value */ + if (ret < 0) + return ret; + + /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ + val->intval = 2304000 + ret * 20000; + break; + default: return -EINVAL; } @@ -672,6 +686,7 @@ static enum power_supply_property bq25890_power_supply_props[] = { POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, + POWER_SUPPLY_PROP_VOLTAGE_NOW, }; static char *bq25890_charger_supplied_to[] = { -- 2.17.1