From 0383024f811aa469df258039807810fc3793a105 Mon Sep 17 00:00:00 2001 From: Jonathan Bakker Date: Mon, 4 May 2020 15:12:58 -0700 Subject: power: supply: max17040: Correct voltage reading According to the datasheet available at (1), the bottom four bits are always zero and the actual voltage is 1.25x this value in mV. Since the kernel API specifies that voltages should be in uV, it should report 1250x the shifted value. 1) https://datasheets.maximintegrated.com/en/ds/MAX17040-MAX17041.pdf Signed-off-by: Jonathan Bakker Signed-off-by: Sebastian Reichel --- drivers/power/supply/max17040_battery.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/power') diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index 8a1f0ee493aa..48aa44665e2f 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -126,7 +126,7 @@ static void max17040_get_vcell(struct i2c_client *client) vcell = max17040_read_reg(client, MAX17040_VCELL); - chip->vcell = vcell; + chip->vcell = (vcell >> 4) * 1250; } static void max17040_get_soc(struct i2c_client *client) -- cgit v1.2.3