From: Michael Grzeschik <m.grzeschik@pengutronix.de>
Date: Thu, 3 Apr 2025 23:02:20 +0000 (+0200)
Subject: usb: typec: mux: fsa4480: add regulator support
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=89ecf105143b39c22f49c18da451e88578e08c03;p=users%2Fjedix%2Flinux-maple.git

usb: typec: mux: fsa4480: add regulator support

The fsa4480 vcc lane could be driven by some external regulator.
This patch is adding support to enable the regulator before probing.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250404-ml-topic-typec-mux-fs4480-v1-1-475377ef22a3@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/typec/mux/fsa4480.c b/drivers/usb/typec/mux/fsa4480.c
index f71dba8bf07c9..c54e42c7e6a16 100644
--- a/drivers/usb/typec/mux/fsa4480.c
+++ b/drivers/usb/typec/mux/fsa4480.c
@@ -12,6 +12,7 @@
 #include <linux/regmap.h>
 #include <linux/usb/typec_dp.h>
 #include <linux/usb/typec_mux.h>
+#include <linux/regulator/consumer.h>
 
 #define FSA4480_DEVICE_ID	0x00
  #define FSA4480_DEVICE_ID_VENDOR_ID	GENMASK(7, 6)
@@ -273,6 +274,10 @@ static int fsa4480_probe(struct i2c_client *client)
 	if (IS_ERR(fsa->regmap))
 		return dev_err_probe(dev, PTR_ERR(fsa->regmap), "failed to initialize regmap\n");
 
+	ret = devm_regulator_get_enable_optional(dev, "vcc");
+	if (ret && ret != -ENODEV)
+		return dev_err_probe(dev, ret, "Failed to get regulator\n");
+
 	ret = regmap_read(fsa->regmap, FSA4480_DEVICE_ID, &val);
 	if (ret)
 		return dev_err_probe(dev, -ENODEV, "FSA4480 not found\n");