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usb: typec: mux: fsa4480: add regulator support

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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>
This commit is contained in:
Michael Grzeschik 2025-04-04 01:02:20 +02:00 committed by Greg Kroah-Hartman
parent f41f7b3d9d
commit 89ecf10514
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/typec/mux/fsa4480.c
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@ -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");