From a3c0c3e79066c78b890c078998c8c6bd577f1d21 Mon Sep 17 00:00:00 2001 From: Puthikorn Voravootivat Date: Tue, 30 Sep 2014 11:18:56 -0700 Subject: bq27x00_battery: Fix flag reading for bq27742 This patch fix the following issues. - Flag for bq27742 is 2 bytes contracy to 1 byte for older hardware - Don't read FLAG_CI as bq27742 does not have it - Use Battery full capacity register as last measure discharge Signed-off-by: Puthikorn Voravootivat Reviewed-by: Benson Leung Signed-off-by: Sebastian Reichel --- drivers/power/bq27x00_battery.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers/power/bq27x00_battery.c') diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c index 5b9f0eacb20a..e3bacfe3bcd0 100644 --- a/drivers/power/bq27x00_battery.c +++ b/drivers/power/bq27x00_battery.c @@ -254,9 +254,11 @@ static inline int bq27x00_battery_read_nac(struct bq27x00_device_info *di) { int flags; bool is_bq27500 = di->chip == BQ27500; + bool is_bq27742 = di->chip == BQ27742; bool is_higher = bq27xxx_is_chip_version_higher(di); + bool flags_1b = !(is_bq27500 || is_bq27742); - flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500); + flags = bq27x00_read(di, BQ27x00_REG_FLAGS, flags_1b); if (flags >= 0 && !is_higher && (flags & BQ27000_FLAG_CI)) return -ENODATA; @@ -436,13 +438,14 @@ static void bq27x00_update(struct bq27x00_device_info *di) bool is_bq27500 = di->chip == BQ27500; bool is_bq27425 = di->chip == BQ27425; bool is_bq27742 = di->chip == BQ27742; + bool flags_1b = !(is_bq27500 || is_bq27742); - cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500); + cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, flags_1b); if ((cache.flags & 0xff) == 0xff) /* read error */ cache.flags = -1; if (cache.flags >= 0) { - if (!is_bq27500 && !is_bq27425 + if (!is_bq27500 && !is_bq27425 && !is_bq27742 && (cache.flags & BQ27000_FLAG_CI)) { dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n"); cache.capacity = -ENODATA; @@ -470,9 +473,7 @@ static void bq27x00_update(struct bq27x00_device_info *di) bq27x00_battery_read_time(di, BQ27x00_REG_TTF); } - if (!is_bq27742) - cache.charge_full = - bq27x00_battery_read_lmd(di); + cache.charge_full = bq27x00_battery_read_lmd(di); cache.health = bq27x00_battery_read_health(di); } cache.temperature = bq27x00_battery_read_temperature(di); -- cgit v1.2.3