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Commit a2e5118c authored by Pali Rohár's avatar Pali Rohár Committed by Lars-Peter Clausen
Browse files

bq27x00: Fix CURRENT_NOW property 



According to the bq27000 datasheet the current should be calculated by
the following formula:
    current = AI * 3570 / 20

This patch adjust the drivers code accordingly.

Signed-off-by: default avatarPali Rohár <pali.rohar@gmail.com>
Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Acked-by: default avatarRodolfo Giometti <giometti@linux.it>
Tested-by: default avatarGrazvydas Ignotas <notasas@gmail.com>
parent 0e9f3049

drivers/power/bq27x00_battery.c

+5 −2
Original line number Diff line number Diff line
@@ -44,6 +44,8 @@ 
#define BQ27500_FLAG_DSC		BIT(0)

#define BQ27500_FLAG_FC			BIT(9)



#define BQ27000_RS			20 /* Resistor sense */



/* If the system has several batteries we need a different name for each

 * of them...

 */
@@ -149,7 +151,7 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di) 


	if (di->chip == BQ27500) {

		/* bq27500 returns signed value */

		curr = (int)(s16)curr;

		curr = (int)((s16)curr) * 1000;

	} else {

		ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di);

		if (ret < 0) {
@@ -160,9 +162,10 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di) 
			dev_dbg(di->dev, "negative current!\n");

			curr = -curr;

		}

		curr = curr * 3570 / BQ27000_RS;

	}



	return curr * 1000;

	return curr;

}



/*