Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1896e93d authored by Ajay Agarwal's avatar Ajay Agarwal
Browse files

phy: msm: usb: Add module param for PHY charger detection 



If Data lines are cut off from PMI and PMI still doing charger
detection, then we get an extcon notification from PMI with
charger type as USB_FLOAT. Add a module parameter which if set,
will queue PHY based charger detection to notify actual charger
type and current to PMI.
Usage of the module param 'chg_detection_for_float_charger':
   echo Y > /sys/module/phy_msm_usb/parameters/chg_detection_for_float_charger

Change-Id: Ibdd2e69ea47440d13ca845b0418da9c485e81d2e
Signed-off-by: default avatarAjay Agarwal <ajaya@codeaurora.org>
parent 2431b7df

drivers/usb/phy/phy-msm-usb.c

+19 −4
Original line number Diff line number Diff line
@@ -273,6 +273,11 @@ static int dcp_max_current = IDEV_CHG_MAX; 
module_param(dcp_max_current, int, 0644);

MODULE_PARM_DESC(dcp_max_current, "max current drawn for DCP charger");



static bool chg_detection_for_float_charger;

module_param(chg_detection_for_float_charger, bool, 0644);

MODULE_PARM_DESC(chg_detection_for_float_charger,

	"Whether to do PHY based charger detection for float chargers");



static struct msm_otg *the_msm_otg;

static bool debug_bus_voting_enabled;
@@ -2974,10 +2979,20 @@ static void msm_otg_set_vbus_state(int online) 
			set_bit(ID, &motg->inputs);

	}



	if (test_bit(B_SESS_VLD, &motg->inputs) &&

	     get_psy_type(motg) == POWER_SUPPLY_TYPE_UNKNOWN &&

	     !motg->chg_detection)

	/*

	 * Enable PHY based charger detection in 2 cases:

	 * 1. PMI not capable of doing charger detection and provides VBUS

	 *    notification with UNKNOWN psy type.

	 * 2. Data lines have been cut off from PMI, in which case it provides

	 *    VBUS notification with FLOAT psy type and we want to do PHY based

	 *    charger detection by setting 'chg_detection_for_float_charger'.

	 */

	if (test_bit(B_SESS_VLD, &motg->inputs) && !motg->chg_detection) {

		if ((get_psy_type(motg) == POWER_SUPPLY_TYPE_UNKNOWN) ||

		    (get_psy_type(motg) == POWER_SUPPLY_TYPE_USB_FLOAT &&

		     chg_detection_for_float_charger))

			motg->chg_detection = true;

	}



	if (motg->chg_detection)

		queue_delayed_work(motg->otg_wq, &motg->chg_work, 0);