5.4-stable review patch. If anyone has any objections, please let me know.
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From: Artur Weber aweber.kernel@gmail.com
[ Upstream commit 30cc7b0d0e9341d419eb7da15fb5c22406dbe499 ]
The charge input threshold voltage register on the MAX77693 PMIC accepts four values: 0x0 for 4.3v, 0x1 for 4.7v, 0x2 for 4.8v and 0x3 for 4.9v. Due to an oversight, the driver calculated the values for 4.7v and above starting from 0x0, rather than from 0x1 ([(4700000 - 4700000) / 100000] gives 0).
Add 1 to the calculation to ensure that 4.7v is converted to a register value of 0x1 and that the other two voltages are converted correctly as well.
Fixes: 87c2d9067893 ("power: max77693: Add charger driver for Maxim 77693") Signed-off-by: Artur Weber aweber.kernel@gmail.com Reviewed-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Link: https://lore.kernel.org/r/20250316-max77693-charger-input-threshold-fix-v1-1... Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/power/supply/max77693_charger.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/power/supply/max77693_charger.c b/drivers/power/supply/max77693_charger.c index a2c5c9858639f..ef3482fa4023e 100644 --- a/drivers/power/supply/max77693_charger.c +++ b/drivers/power/supply/max77693_charger.c @@ -556,7 +556,7 @@ static int max77693_set_charge_input_threshold_volt(struct max77693_charger *chg case 4700000: case 4800000: case 4900000: - data = (uvolt - 4700000) / 100000; + data = ((uvolt - 4700000) / 100000) + 1; break; default: dev_err(chg->dev, "Wrong value for charge input voltage regulation threshold\n");