Commit 50844aaf authored by Charles Keepax's avatar Charles Keepax Committed by DidntRead
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switch: arizona: Correct handling of external resistance for low values 



For external resistance values < 4 ohms we might currently set a high
short circuit impedance than we have to. Correct this by taking the
external resistance into account.

Change-Id: Idbb68a39c5ee763284b8763d218af89353f74e6c
Signed-off-by: default avatarCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
parent da5ecd5f

drivers/switch/switch-arizona.c

+5 −2
Original line number Diff line number Diff line
@@ -3242,11 +3242,14 @@ static int arizona_extcon_probe(struct platform_device *pdev) 
	hpdet_short = pdata->hpdet_short_circuit_imp + pdata->hpdet_ext_res;



	if (hpdet_short < ARIZONA_HP_SHORT_IMPEDANCE) {

		hpdet_short = ARIZONA_HP_SHORT_IMPEDANCE - pdata->hpdet_ext_res;



		dev_warn(arizona->dev,

			 "Increasing HP short circuit impedance from %d to %d\n",

			 pdata->hpdet_short_circuit_imp,

			 ARIZONA_HP_SHORT_IMPEDANCE);

		pdata->hpdet_short_circuit_imp = ARIZONA_HP_SHORT_IMPEDANCE;

			 hpdet_short);



		pdata->hpdet_short_circuit_imp = hpdet_short;

	} else if (pdata->hpdet_short_circuit_imp >= HP_LOW_IMPEDANCE_LIMIT) {

		pdata->hpdet_short_circuit_imp = HP_LOW_IMPEDANCE_LIMIT - 1;

	}