From 89ecf105143b39c22f49c18da451e88578e08c03 Mon Sep 17 00:00:00 2001 From: Michael Grzeschik Date: Fri, 4 Apr 2025 01:02:20 +0200 Subject: [PATCH] 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 Reviewed-by: Heikki Krogerus Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20250404-ml-topic-typec-mux-fs4480-v1-1-475377ef22a3@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/mux/fsa4480.c | 5 +++++ 1 file changed, 5 insertions(+) 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 #include #include +#include #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"); -- 2.51.0