From adcf04c9f8fce54e65f11bae2fbd37c1282ef128 Mon Sep 17 00:00:00 2001 From: Phil Reid Date: Tue, 11 Jul 2017 17:43:43 +0800 Subject: [PATCH] power: supply: sbs-battery: Add delay when changing capacity mode bit At least with the Inspired Energy compatible batteries a delay is required after setting the capacity mode bit from amp to watts or the reverse. Setting the bit and then immediately pooling the status register results in an unknown error being returned in the register. Add the delay results in and ok status being return. This was also seen when reading the charge and energy registers where the wrong value was returned for the requested mode. Signed-off-by: Phil Reid Tested-by: Michael Heinemann Signed-off-by: Sebastian Reichel --- drivers/power/supply/sbs-battery.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/power/supply/sbs-battery.c b/drivers/power/supply/sbs-battery.c index a5eacc4b35e3..b19a73176910 100644 --- a/drivers/power/supply/sbs-battery.c +++ b/drivers/power/supply/sbs-battery.c @@ -14,6 +14,7 @@ * more details. */ +#include #include #include #include @@ -527,6 +528,8 @@ static enum sbs_battery_mode sbs_set_battery_mode(struct i2c_client *client, if (ret < 0) return ret; + usleep_range(1000, 2000); + return original_val & BATTERY_MODE_MASK; }