From 4b226c2cf04eb373369d298fa00181b0eec71233 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Pali=20Roh=C3=A1r?= Date: Tue, 1 Nov 2011 01:43:05 +0100 Subject: [PATCH] bq27x00_battery: Report -ENODATA if bq27000 battery was not calibrated MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit * CI (Capacity Inaccurate) flag is set after full reset on bq27000 battery * when is set, all capacity properties should be reported incorrectly, because there was no learning cycle and battery was not calibrated * instead reporting incorrect values, report -ENODATA Signed-off-by: Pali Rohár Signed-off-by: Anton Vorontsov --- drivers/power/bq27x00_battery.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c index a531122..6c8dfdb 100644 --- a/drivers/power/bq27x00_battery.c +++ b/drivers/power/bq27x00_battery.c @@ -56,6 +56,7 @@ #define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */ #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */ #define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */ +#define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */ #define BQ27000_FLAG_FC BIT(5) #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */ @@ -265,12 +266,20 @@ static void bq27x00_update(struct bq27x00_device_info *di) cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, is_bq27500); if (cache.flags >= 0) { - cache.capacity = bq27x00_battery_read_rsoc(di); + if (!is_bq27500 && (cache.flags & BQ27000_FLAG_CI)) { + cache.capacity = -ENODATA; + cache.time_to_empty = -ENODATA; + cache.time_to_empty_avg = -ENODATA; + cache.time_to_full = -ENODATA; + cache.charge_full = -ENODATA; + } else { + cache.capacity = bq27x00_battery_read_rsoc(di); + cache.time_to_empty = bq27x00_battery_read_time(di, BQ27x00_REG_TTE); + cache.time_to_empty_avg = bq27x00_battery_read_time(di, BQ27x00_REG_TTECP); + cache.time_to_full = bq27x00_battery_read_time(di, BQ27x00_REG_TTF); + cache.charge_full = bq27x00_battery_read_lmd(di); + } cache.temperature = bq27x00_read(di, BQ27x00_REG_TEMP, false); - cache.time_to_empty = bq27x00_battery_read_time(di, BQ27x00_REG_TTE); - cache.time_to_empty_avg = bq27x00_battery_read_time(di, BQ27x00_REG_TTECP); - cache.time_to_full = bq27x00_battery_read_time(di, BQ27x00_REG_TTF); - cache.charge_full = bq27x00_battery_read_lmd(di); cache.cycle_count = bq27x00_battery_read_cyct(di); /* We only have to read charge design full once */ -- 2.7.4