extcon: intel-mrfld: Sync hardware and software state on init

extcon driver for Basin Cove PMIC shadows the switch status used for dwc3 DRD to detect a change in the switch position. This change initializes the status at probe time. Cc: [email protected] Fixes: 492929c ("extcon: mrfld: Introduce extcon driver for Basin Cove PMIC") Reviewed-by: Andy Shevchenko <[email protected]> Signed-off-by: Ferry Toth <[email protected]> Signed-off-by: Chanwoo Choi <[email protected]>
sm00th · Jun 21, 2021 · ecb5bdf · ecb5bdf
1 parent 009c9aa
commit ecb5bdf
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/drivers/extcon/extcon-intel-mrfld.c b/drivers/extcon/extcon-intel-mrfld.c
@@ -197,6 +197,7 @@ static int mrfld_extcon_probe(struct platform_device *pdev)
 	struct intel_soc_pmic *pmic = dev_get_drvdata(dev->parent);
 	struct regmap *regmap = pmic->regmap;
 	struct mrfld_extcon_data *data;
+	unsigned int status;
 	unsigned int id;
 	int irq, ret;
 
@@ -244,6 +245,14 @@ static int mrfld_extcon_probe(struct platform_device *pdev)
 	/* Get initial state */
 	mrfld_extcon_role_detect(data);
 
+	/*
+	 * Cached status value is used for cable detection, see comments
+	 * in mrfld_extcon_cable_detect(), we need to sync cached value
+	 * with a real state of the hardware.
+	 */
+	regmap_read(regmap, BCOVE_SCHGRIRQ1, &status);
+	data->status = status;
+
 	mrfld_extcon_clear(data, BCOVE_MIRQLVL1, BCOVE_LVL1_CHGR);
 	mrfld_extcon_clear(data, BCOVE_MCHGRIRQ1, BCOVE_CHGRIRQ_ALL);